2013년 추계 학술대회 우수논문발표상 수상자
WISET 한국공업화학회 젊은 여성 연구자상
1SH-1
Hydrogen production from methanol steam reforming over Cu–Ti–P oxide catalysts 김수정·강미숙*,†
한국전자통신연구원,*영남대학교 화학과 ([email protected]†)
The phosphorous-promoted Cu-Ti oxide (Cu-Ti-P) catalysts, Cu(1.0 mol%) and P(1.0, 2.0, and 4.0 mol%)-incorporated into the framework of Ti(1.0 mol%)O2, that were synthesized using a solvothermal method in the present study, and used for their potential compatibilities in methanol steam reforming. Comparative ex- periments in methanol oxidative steam reforming were also conducted over γ-Al2O3 support. The Cu-Ti-P/γ -Al2O3 catalyst provided significantly higher methanol reforming reactivity compared to that without P compo- nent, and the tendency was similar to the existence of γ-Al2O3 support. We suggest a mechanism that P compo- nent plays an important role of encouraging the Brnsted acid sites, resulted to strongly partial oxidation and ther- mal cracking of methanol to acetaldehyde and CO2 respectively, eventually, it makes increasing the hydrogen yield and suppressing CO generation.
Keywords: Hydrogen production, Methanol oxidative steam reforming, Sovothermal method
1SH-2
CO2 absorption characteristics in aqueous potassium carbonate with 2-methylpiperazine and piperazine
김영은·최정호·남성찬·정순관·윤여일†
한국에너지기술연구원 ([email protected]†)
Absorption by chemical absorbents is a suitable method for CO2 capture from large quantities in the flue gas.
Aqueous K2CO3 solution has high CO2 solubility and low heat of absorption as good as amine solution, while its absorption rate is very slow. Amines as absorption rate promoters have been blended with aqueous K2CO3
solution in order to improve the performance of CO2 absorption rate. In this study, piperazine (PZ) and 2-meth- ylpiperazine (2-MPZ), cyclic diamines were used as a rate promoter. The CO2 absorption capacity and heat of absorption were measured by using vapor-liquid equilibrium (VLE) apparatus and a differential reaction calo- rimeter (DRC), respectively. Aqueous K2CO3/PZ solution and K2CO3/2-MPZ solution had 50% higher CO2 ab- sorption capacity and 23% lower heat of absorption than aqueous monoethanolamine (MEA) solution.
Keywords: CO2 absorption, potassium carbonate, promoter
2P-366
전기방사 공정변수에 따른 키토산과 알진산 섬유의 형태 변화
이수정·남상용†
경상대학교
전기방사법은 다른 나노섬유 제조방법보다 제조방법이 간편하고 구조 및 형태의 제어가 용의하다는 장점을 가지고 있다. 또한 용액의 성질, 조작 조건, 온도 등에 의해 섬유의 생성 및 형태가 조절 된다. 이에 천연고분자인 알진산과 키토 산을 사용하여 섬유화를 시켰으며 이 과정에 키토산 용액의 경우 아세트산과 poly(ethylene oxide)(PEO)의 농도에 따라 jet이 형성되며 섬유의 형태가 생성되는데 결정적인 영향을 끼쳤으며 알진산도 마찬가지로 알진산와 PEO의 농도에 따 라 섬유상의 형성에 직접적인 작용을 한 것을 확인할 수 있었다. 농도 이외에도 노즐과 집전판사이의 거리, 용액의 토출 량, 인가전압에 의해서 섬유상의 형태가 변화되는 것을 관찰하였다, 공정변수에 의해 변화되는 형태는 주사전자현미경 을 통해 확인하였고 적외선 분광기를 통해 섬유화를 확인하였다.
Keywords: electrospinning, sodium alginate, chitosan
대학원 우수논문
2LH-8
Fabrication of Multiscale Porous TiO2 Nanofibers for Dye-Sensitized Solar Cells
황선혜·장정식†
서울대학교 화학생물공학부 ([email protected]†)
Multiscale porous (MSP) TiO2 nanofibers (NFs) are fabricated by a simple electrospinning and etching process with TiO2/SiO2 composite NFs to increase power conversion efficiency (PCE) of dye-sensitized solar cells (DSSCs). TiO2 NFs with different pore structure (small, large, and multiscale) were introduced controlling the sizes of SiO2 nanoparticles (NPs). The surface area of the MSP TiO2 NFs exhibited nine times higher than that of pure TiO2 NFs, providing enhanced light scattering effect, sufficient dye absorption on for light harvesting, and efficient electrolyte contact. As a result, the MSP NFs based DSSCs exhibited an increased current density (Jsc) of 16.3 mA cm−2 and a high PCE (η) of 8.5%, greater than those of only TiO2 NPs based DSSCs (Jsc of 12.0 mA cm−2 and η of 6.0%).
Keywords: porous TiO2 nanofiber, light scattering, multifuction TiO2, dye sensitized solar cells
구두발표 우수논문
2LH-4
Effect of Alkoxy Side Chain on 2,1,3-benzothiadiazole for Donor Acceptor Type Organic Photovoltaics
송관욱·문두경†
건국대학교 ([email protected]†)
Poly(quarterthiophene-alt-benzothiadiazole), PQT12oBT, was synthesized through the Stille coupling reaction.
The UV-visible absorption spectrum exhibited a higher molar absorption coefficient (ε = 44 kM-1cm-1 at 535 nm) in solution state. The HOMO energy levels was -5.18 eV. From the results of X-ray diffraction measure- ments, the lamellar d-spacing of PQT12oBT in out-of-plane direction was determined to be 21.6 Å, and the π-π stacking distance between layers was found to be 4.09 Å, with a slight edge-on orientation. With a 1:1
ratio of PQT12oBT and PC71BM, the values of open circuit voltage (Voc), short circuit current density (Jsc), fill factor (FF), and power conversion efficiency (PCE) were found to be 0.77 V, 8.9 mA/cm2, 62.4%, and 4.2%, respectively.
Keywords: Stille coupling reaction, benzothiadiazole, alkoxy side chains
2LH-2
Synthesis and Electroluminescence Properties of Highly Efficient Dual Core Chromophores Having a Side Group
김승호·이하윤·김범진·신환규·이재현·김중한·이지훈*·박종욱†
가톨릭대학교,*한국교통대학교 ([email protected]†)
This study substituted phenyl and naphthyl, which are different in size, with side groups and systematically changed their position in a dual core composed of anthracene and pyrene to synthesize blue emitting materials with asymmetric or symmetric structures. The study synthesizes 1-Naphthalen-1-yl-6-(10-phenyl-anthracen- 9-yl)-pyrene (Ph-AP-Na) and 1-(10-Naphthalen-1-yl-anthracen-9-yl)-6-phenyl-pyrene (Na-AP-Ph), as the structures asymmetric with 1-Anthracen-9-yl-pyrene (AP-core), a dual core, and 1-Phenyl-6-(10- phenyl-anthracen-9-yl)-pyrene (Ph-AP-Ph) and 1-Naphthalen-1-yl-6-(10-naphthalen-1-yl-anthracen- 9-yl)-pyrene (Na-AP-Na) as those symmetric with AP-core. In compounds, Na-AP-Na which larger naphthyl was substituted in anthracene and pyrene showed the highest EL device efficiency.
Keywords: OLEDsㆍFluorescence, Blue emitter, Dual core, Side group effect
2LH-6
Investigation on the materials for the joining of α-Al2O3 for sodium-sulfur (NaS) battery 장성필*,**·지미정*·설광희*·신상호*·최병현*,†
*Electronic Materials Team, Korea Institute of Ceramic Engineering & Technology,
**Dept. of Electrical Engineering, Korea University ([email protected]†)
We designed the joining materials for NaS battery and investigated the bonding-strength depending on the surface-treatments or the plating-conditions. Designed joining materials were analyzed by TMA in terms of ma- terial property, and joining temperature was estimated by high-temperature microscope. Joined α-Al2O3 sam- ples were analyzed in terms of bonding-strength and microstructure, thereby joining mechanism was explained.
Keywords: Sodium-Sulfur battery, Joining materials, Surface-treatment, Electroless-plating
포스터발표 우수논문
[생물공학] 1P-6
Development of drug delivery system for the breast cancer treatment
이찬희·백운용·김주승·이우걸†
단국대학교 화학공학과 ([email protected]†)
Breast cancer is one of frequent diseases occurring in women and has serious problems of metastasis and re-
currence after treatment. For the treatment of breast cancer, various methods for the preparation of treatment drugs using chemical synthesis or extraction from natural plants, etc are under investigation. In this study, we ex- amined the efficacy of various drugs on vitro cellular responses. The result demonstrated that factors such as contact time and drug concentrations affected the cellualr responses.
Keywords: bisphosphonate, breast cancer, catechin, scaffold
[생물공학] 1P-17
Biodiesel production by microalga, Dunaliella tertiolecta using plastic photobioreactors in ocean cultivation
정광수·정성균·김수권·이철균†·김지훈·홍한마루·배재한·김희윤·임상민
인하대학교 ([email protected]†)
Microalgae are a monad, they can be performing photosynthesis and important for life on earth as a primary producer. In recent, microalgae have been expected as feedstocks for alternative liquid biofuels of crude oil based fuels because of their high density energy oil and biomass productivities. Microalgae ocean cultivation system has a lot of benefits such as culture temperature controlling by seawater temperature, natural sun light. In this study, we performed microalgae seasonal cultivation utilizing floating plastic photobioreactors on the shore of won is- land to confirm the potential of microalgae cultivation in the ocean. The highest biomass productivity was ach- ieved in the summer by optimal seawater temperature (0.11 g L-1 d-1). However, the biomass productivities in spring and fall were 0.005 g L-1 d-1 and 0.02 g L-1 d-1, respectively, by low seawater temperature. As a result, we confirmed the possibility of microalgae cultivation in the ocean.
Keywords: microalgae, biodisel, Dunaliella tertioecta
[생물공학] 1P-23
Improved productivity of biodiesel through semi-continuous culture process using Neochloris oleoabundas
윤세영·장원석*·심상준†
고려대학교,*한국지역난방공사 기술연구소 ([email protected]†)
To overcome energy crisis and human enhanced global warming effect recently, biodiesel as an alternative en- ergy source has being considered. A modified culture mode called semi-continuous culture was applied to im- prove fatty acid productivity in Neochloris oleoabundans and compared with conventional batch culture system.
Through the semi-continuous culture except 1st cycle, this study achieved the enhanced fatty acid productivity of 22.42 mg·L-1·d-1 meanwhile, conventional batch culture acquired the productivity of 15.62 mg·L-1·d-1. This study shows that the fatty acid productivity could be improved by applying semi-continuous culture process in outdoor condition.
Keywords: Microalgae culture mode, Fatty acid productivity, Neochloris oleoabundans, Outdoor cultivation
[생물공학] 1P-44
Optimization of microwell-based cell docking in microvalve-integrated microfluidic device 송 강·정헌호·장성찬·이창수†
충남대학교 ([email protected]†)
In this paper, we develope a novel cell docking system that combines with microvalves and microwells. Con-
ventional cell docking device based on micro-well suffers from generation of dead volume and shear stress within micro-wells resulting in low efficiency of cell docking, limitation of nutrient, and low cell viability. The efficiency of cell docking into microwells is varied with several experimental parameters including flow rate, cell concen- tration, micro-valve pressure, and shape of microstructure. Integration of microvalve on microwells is able to minimize the behavior of dead volume and eddy in microwell as well as shear stress. Especially, the microvalves can change flow dynamics to induce localization of cells in desired locations. We examined the effect of micro- valves in the cell docking process by controling the valve pressure, shape, and size. We found the optimal flow rate and valve pressure to obtain high efficiency of cell docking in microwells. Therefore, this microfluidic device could offer a platform for a wide range of applications such as cell based assay and cell biology.
Keywords: microfluidic, microvalve, cell docking
[석유화학 · 윤활유] 1P-70
합성가스 생산에 기여하는 이산화탄소 전환반응
국진우·이시훈†
전북대학교 ([email protected]†)
화석연료의 고갈과 환경 오염에 대한 우려로 인해서 친환경적인 에너지 전환 기술의 개발이 활발히 진행되고 있으며 석유 화학의 기초 원료로 이용될 수 있고 전기부터 대체연료까지 생산할 수 있는 합성가스를 생산하는 가스화 공정이 석유화학 회사들로부터 가장 큰 관심을 받고 있다. 특히 황 함유량이 높아 독성 폐기물로 분류되는 석유 코크스의 안정 적인 처리와 이를 통한 합성가스의 생산은 석유화학 회사에 큰 이익을 제공해 줄 것이다. 그러나 높은 황 함유량, 낮은 반응성, 가스화 반응성 연구 미비 등이 석유 코크스 가스화의 확산을 가로막는 장애물이 되었다. 따라서 본 연구에서는 국내에서 발생되는 석유 코크스와 저급탄을 이용하여 가스화 공정에서 발생하는 이산화탄소 전환 반응을 열천칭 반응기 와 TGA를 이용하여 연구하였다. 부분 산화 반응에 비해 매우 느리게 진행되나 이산화탄소 전환 반응은 가스화 공정에서 일산화탄소의 추가 발생에 기여하고 있다.
Keywords: 이산화탄소, 석유 코크스, 석탄
[에너지저장변환] 1P-85
Face-on Structure formed Isoindigo-based Copolymer for Polymer Solar Cells
최민희·송관욱·한용운·문두경†
건국대학교 ([email protected]†)
The use of isoindigo(iI) as a new acceptor in conjugated systems taking advantage of the D-A approach for OPVs. Isoindigo has strong electron-withdrawing character due to its two lactam rings. Their broad absorption spectra, high extinction coefficients, and appropriate energy levels inspired us to modify their chemical structures and explore their PV performance further. In this work, we present the synthesis and detailed characterization of low band gap copolymer semiconductors which are prepared from the combination of the isoindigo unit with thiophene moieties via Stille coupling. The synthesized polymers are showed physical, optical, electrochemical and photovoltaic properties. Therefore, structure-property relationships caused by a difference of donor have been observed.
Keywords: isoindigo, thiophene, C-T type polymer, OPVs, Stille coupling reaction
[에너지저장변환] 1P-88
Stimuli responsive polymer surface coating for antifouling effect 이강석·Abdullah-Al-Nahain·이소영·박성영†
한국교통대학교 ([email protected]†)
pH and DTT responsive surface with highly fouling resistance is reported using poly[(hydroxyethylmethacry- late-g-benzoic acid)-co-(dimethylaminoethyl methacrylate-g-2-chloro-3', 4'-dihydroxyacetophenone)]
[poly[(HEMA-BA)-co-(DMAEMA-CCDP), P1] as coating material. After that, redox responsive disulfide con- taining amine end capped Pluronic [Plu-S-S-NH2, P2] was introduced to P1 via formation benzoic imine bond where polyethylene glycol (PEG) plays as antifouling agent. X-ray photoelectron spectroscopy (XPS) and contact angle demonstrated adhesion of P1 and deposition of P2 onto P1 coated substrates. SEM showed reattachment of Hela cells from P2 layered P1 coated substrates (P2-P1) after pretreated at lower pH and higher DTT. This P2- P1 on the substrates can play an essential role as antifouling behavior with well tuned cell attachment and detachment.
Keywords: cell adhesion, catechol, surface coating, stimuli responsive
[에너지저장변환] 1P-92
Universal coating of polystyrene beads by catechol conjugated graft copolymer and as functionalization with various nanoparticles
정찬진·박성영†
한국교통대학교 ([email protected]†)
A universal method to modify polystyrene beads (PSBs) using catechol moiety 2-chloro-3', 4’-dihydroxy- acetophenone (CCDP) conjugated to poly(ethylene glycol)-g-poly(dimethylaminoethyl methacrylate) [PEG-g- PDMAEMA, QC-PEG] is proposed. CCDP of QC-PEG is adhered onto PSBs under alkali condition where PVP was added as stabilizer. The modified PSBs (MPSBs) was functionalized by depositing silver nanoparticles (SNPs) as antimicrobial, iron oxide nanoparticle (IONPs) as magnet and TiO2 as photocatalyst. Modification and func- tionalization of the MPSBs were rectified by scanning electron microscope (SEM), X-ray photoelectron micro- scope (XPS) and UV-vis spectrometer. The functionalized MPSBs show outstanding antimicrobial activities against gram-positive and negative bacteria for containing SNPs while photocatalytic behaviour was found against methylene blue after depositing TiO2.
Keywords: Modification, functionalization, polystyrene bead, catechol, photocatalyst, antimicrobial, magnetic
[에너지저장변환] 1P-111
Enhanced performance of Inverted organic solar cells with Au Nanoparticle
백경훈·허수원·송관욱·문두경†
건국대학교 ([email protected]†)
Organic photovoltaics(OPVs) have attracted a lot of interest due to lightweight, flexibility and low cost.
However, there are some shortcomings such as corrosion of ITO by acidic PEDOT:PSS. So, many studies were focused on inverted structure of OPV. In inverted structure of OPVs, metal oxide was widely used as an electron collecting layer. To increase the power conversion efficiency, enhanced photon-harvesting property was required.
So we introduced metal nanoparticle into the metal oxide layer. Metal nanoparticles exhibit localized surface plasmon resonance (LSPR) that couple to incident light, and they can also reflect and scatter light. In this study, we fabricated inverted OPV devices with metal oxide layer, which was introduced Au nanoparticle by changing size. As a result, the power conversion efficiency of fabricated devices was enhanced.
Keywords: inverted solar cell, Au nanoparticle, photon-harvesting
[에너지저장변환] 1P-122
N-doped Microporous Carbons for Enhancing CO2 Capture Performance
이슬이·허영정·최용기·이상운·한인기·박수진†
인하대학교 ([email protected]†)
In this work, we have prepared N-doped microporous carbons by one-pot pyrolyzing method without activa- tion process as a function of N content. The microcrystalline characteristics were studied XRD. The features and morphologies were observed SEM measurements. The textural properties were investigated by N2/77 K and vapor isotherms. The CO2 adsorption/desorption performance was evaluated using a TGA at 40oC. From the results, it was found that the nitrogen-function groups on carbon surfaces had contributed to enhance the CO2 adsorption in the CO2/N2 atmospheres.
Keywords: CO2 capture, Microporous carbons, Nitrogen functional groups
[에너지저장변환] 1P-147
On the Origin of Electrocatalytic Oxygen Reduction Reaction on Electrospun Nitrogen-Carbon Species 신동윤*·정범균*·문봉진**,***·전홍래*·신현준****·백재윤****·이재영*,***,†
*광주과학기술원 환경공학부,**광주과학기술원 물리 광과학과,***Ertl center,****포항가속기연구소 ([email protected]†)
Nitrogen-doped carbon (N-C) is a promising alternative electrocatalyst for oxygen reduction reaction (ORR) to replace the expensive Pt, but the origin of electrocatalytic ORR activity of various N-C materials is still unclear. In this study, we show our facile approach to the synthesis of highly active metal-free N-C catalyst with the chemical treatments including hydroxide activation and complete metal leaching. Through the detailed investigation on the origin of ORR electrocatalysis for electrospun N-C nanofibers, we revealed that pyrrolic-N and highly graphitized carbon are mainly responsible for the enhanced ORR activity of metal-free N-C nanofiber and embedded Co metal is involved in the creation of the pyrrolic-N site.
Keywords: oxygen reduction reaction, non-noble metal catalyst, electrospinning, N-doped carbon
[에너지저장변환] 1P-148
Change ion conductivity over Sulfonization time of
Polystyrene-block-poly-(ethylene-ran-butylene)-block-polystyrene (SEBS)
박혜선·홍창국†
전남대학교 ([email protected]†)
Currently commercialized Nafion is perfuorinated polymer ion exchange membrane. Nafion has the advantage of high ionic conductivity but has the disadvantage of high cost. IN 50mol% of the styrene SEBS based on the degree of sulfonation, similar to Nafion performace was reported. Similarly, the fine structure of Nafion ion ex-
change channels, but because of non-crossliking, sulfonated SEBS thends to be swelling in the water. Therefore make membrande which sulfonsuccinic acid(SSA) by using the cross-linking agent is not soluble in water and has ability to diliver the hydrogen ions. Chlorosulfonic acid by using sulfonization agent were measured ionic conductivity as a time dependent.
Keywords: ionic conductivity, sulfonization, SEBS
[에너지저장변환] 1P-153
Reversely fabricated dye-sensitized solar cells 임정민†·김현아*·한치환**
UNIST,*Korea Conformity Laboratories,**KIER-UNIST Advanced Center for Energy ([email protected]†)
We report a novel structure of dye sensitized solar cells (DSSC) with reversed form. This was done by con- structing all the components together as one substrate in the following order: platinum, silica layer, titanium di- oxide layer, and indium-doped tin oxide layer. To separate the photoanode from the photocathode and to make room for electrolytes, a layer of silica nanoparticle was introduced. With this new structure, a power conversion efficiency of 5.4% was achieved with comparable current density and open circuit voltage values to the conven- tional structure. Moreover, the present approach could be an encouraging new direction in research while provid- ing for the fabrication of hybrid-tandem solar cells.
Keywords: solar cell, reverse, dye-sensitized solar cell
[에너지저장변환] 1P-174
Electromagnetic Interference Shielding Effectiveness of EVO/epoxy/MWCNT Nanocomposites 임윤지·박미라·서민강*·김학용·David S. KIM**·박수진***,†
전북대학교, *한국탄소융합기술원,**대구국제학교,***인하대학교 ([email protected]†)
In this work, the effect of multi-walled carbon nanotube (MWCNT) on the electromagnetic interference shield- ing effectiveness (EMI SE) of epoxidized vegetable oil (EVO)/epoxy/MWCNT nanocomposites was examined. The EVO was synthesized and characterized using fourier transform infrared (FT-IR) spectra, nuclear magnetic reso- nance (NMR), and gel permeation chromatograph (GPC). The electric resistance of the nanocomposites was tested using a 4-point-probe electric resistivity tester. The EMI SE of the nanocomposites was evaluated by means of the reflection and adsorption methods. From the result, it was found that the EMI SE was enhanced with increas- ing the MWCNT content, which played a key factor to determine the EMI SE.
Keywords: Electromagnetic interference shielding effectiveness, Epoxidized vegetable oil, Epoxy, Multi-walled carbon nanotubes
[정밀화학] 1P-215
Manufacture of N-TiO2 coated activated carbon pellets and removal properties of VOCs
조세호·김예솔·김민일·이다영·이영석†
충남대학교 ([email protected]†)
In this study, N doped TiO2 (N-TiO2) coated activated carbon pellet (ACP) manufactured using sol-gel and solid state heat treatment of urea and evaluated removal property of volatile organic compounds (VOCs). The
removal property of N-TiO2 coated ACP was investigated under the light emitting diods lamp using benzene gas.
The increment of titanium tetra isopropoxide contents lead to the increased TiO2 coating amount of ACP surface.
In these removal results of benzene, breakthrough time of N-TiO2 coated ACP is 2.0 times better than uncoated ACP.
Keywords: VOCs, Activated carbon pellet, N doped TiO2, breakthrough time
[정밀화학] 1P-218
SI 열화학 수소 제조 공정에서 반회분식 조건 하 HIx 용액을 이용한 분젠 반응의 상 분리 특성
김효섭·안병태·김종석·김영호†
충남대학교 ([email protected]†)
SI(Sulfur-Iodine) 공정은 열화학 수소 제조 공정은 오염물질의 배출 없이 대량의 수소를 생산할 수 있는 유망한 공정 으로 잘 알려져 있다. 최근 발표된 SI 통합 공정의 흐름도에 의하면 HI 분해 반응 단계에서 분젠 반응 단계로 HI, I2 및 H2O를 주로 포함하는 HIx 용액이 공급되는 것으로 보고되었다. 따라서 우리는 HIx 용액을 이용한 분젠 반응으로부 터 얻은 생성물들의 상 분리 특성 및 조성에 대한 종합적인 결과를 제공하기 위한 목적으로 분젠 반응을 수행하였다.
반회분식 조건하에서 실험이 진행되었으며, 공정 변수로써 반응 온도, I2 및 물 공급 농도가 변화되었다.
Keywords: Hydrogen production, Sulfur-Iodine process, Bunsen reaction, HIx solution
[정밀화학] 1P-232
유용성 Ferrocene계 친환경 연료첨가제 합성에 관한 연구
김형희·오성희·공호열·이동구·정근우†
한국화학연구원 ([email protected]†)
세계적으로 환경오염에 대한 관심이 급증하고 있는 가운데, 자동차 및 선박용 연료의 배기가스에 대한 규제가 한층 강화되고 있다. 이러한 환경규제에 대응하기 위한 한 가지 방안으로 Ferrocene을 각종 연료에 첨가제로 사용하여 연소 효율을 높이려는 시도가 있었으나, Ferrocene 자체의 오일에 대한 낮은 용해도로 인해 실제적용에 제한점이 있었다.
본 연구에서는 오일에 대한 Ferrocene의 용해도를 높여주기 위해 Alkyl side chain을 직접 도입하여 유용성의 신규 Ferrocene계 물질을 성공적으로 합성했으며, 특히 일반적으로 Friedel-crafts 알킬화 반응시 사용되는 AlCl3 촉매, Chlorinated solvent를 사용하지 않는 합성법을 개발하였다. 합성된 신규 Ferrocene계 물질은 점도가 있는 액상 형태로 얻어졌으며, 오일과 아주 잘 섞이는 물리적 성질을 보여주었다. 또한 Fe 함량은 8-10% 정도로 실제 연료첨가제로서의 적용 가능성을 확인하였다.
Keywords: Ferrocene, 연료첨가제
[정밀화학] 1P-236
높은 삼중항 에너지를 갖는 Al 화합물을 이용한 고효율 녹색 인광 소자 개발
오찬석·이준엽†
단국대학교 ([email protected]†)
높은 삼중항 에너지를 가지는 Al 화합물인 tris(2-(oxazol-2-yl)phenoxy)aluminum (AlO3)를 녹색 인광 호스트 재 료로서 합성하였다. AlO3 화합물은 HOMO -6.06 ev, LUMO -2.77ev로 측정되었으며, 삼중항 에너지는 녹색 인광 호스트 재료에 쓰일 수 있는 2.75 ev를 보였다. AlO3는 녹색 인광 도펀트인 iridium (III) tris(2-phenylpyridine)를 이용 하여 제작한 소자에서 22.3%에 높은 양자효율을 보였다.
Keywords: Aluminium, Host, Green, Phosphorescent
[정밀화학] 1P-240
SI 수소 제조 공정에서 분젠 반응 단계의 상 분리 효율 향상을 위한 HIx 상/H2SO4 상의 부피비 변화 특성
금영섭·김효섭·안병태·김종석·김영호†
충남대학교 ([email protected]†)
SI(Surfur-Iodine) 열화학 수소 제조 공정 내 분젠 반응 단계에서 생성되는 H2SO4상은 HIx 상보다 상대적으로 적은 양이 형성된다. 특히, HIx(HI+I2+H2O) 용액이 주로 존재하는 조건에서 수행된 분젠 반응에서는 매우 적은 양의 H2SO4 상이 형성되어 상 분리를 원활하게 진행하는 것이 어렵다. 이에 따라 상 분리 효율 향상을 위한 각 생성물의 부피 및 부피 비 변화에 따른 상 분리 특성을 연구할 필요성이 대두되었다. 이를 위해 본 연구에서는 분젠 반응의 생성물인 H2SO4 상 용액과 HIx 상 용액을 임의로 제조하여 혼합한 후 각 상의 부피 비에 따른 상 분리 특성을 규명하고자 하였다.
더 나아가 혼합 전과 후의 조성 비교를 통해 혼합 용액의 부피 비가 조성에 미치는 영향을 확인하였다.
Keywords: Sulfur-Iodine process, Bunsen reaction, Volume ratio, Phase separation
[정밀화학] 1P-244
Effects of Pore Structures on Electrochemical Behaviors of Activated Carbon by Polymeric Precursor
이혜민·김홍건*·김병주·안계혁†
한국탄소융합기술원,*전주대학교 탄소융합공학과 ([email protected]†)
In this study, activated carbons (ACs) were prepared for supercapacitor electrode applications by using poly- meric precursor under various activation conditions. The surface morphologies and structural characteristics of activated carbons were observed by SEM and XRD, respectively. The N2 adsorption isotherm characteristics at 77K were confirmed by BET and DR equations. From the results, specific surface areas and total pore volume of the porous carbons were determined as 1200~2400 m2/g and 0.53~1.22 cm3/g, respectively. It was also ob- served that various pore size distributions were found to be depended on the functions of activation time and temperature. The ACs were applied as an electrode for EDLCs and analyzed in relation to the activation conditions.
Keywords: activated carbons, steam activation, physical activation, electric double layer capacitor
[정밀화학] 1P-264
Redox and pH-sensitive novel polymeric nanoparticle of antifungal agent
장재영·김남홍·김원석·박준규·남정표·박성철·최창용·장미경·나재운†
순천대학교 ([email protected]†)
In this study, redox and pH-sensitive novel polymeric nanoparticle was prepared for efficient delivery of anti- fungal drug. Amphotericin B (AmB) was mainly used in medical filed, which was effective in the fungal infection.
But AmB has a few problems, nephrotoxicity, high insolubility and toxicity. Poly(Ethylene glycol)(PEG) was con- jugated to improve solubility of AmB, and that was grafted to O-carboxymethyl chitosan with disulfide bond.
The nanoparticle was charicterized by fourier transform infrared spectroscopy (FT-IR), proton nuclear magnetic resonance spectroscopy (1H-NMR), dynamic light scattering (DLS) and high-performance liquid chromatography (HPLC). This research was supported by Basic Science Research Program through the National Research Foun-
dation of korea (NRF) funded by the Ministry of education. Science and Technology (NRF-2012R1A2A2A01014898).
Keywords: antifungal drug, nanoparticle, fungal infection, pH-sensitive release
[정보전자 · 소재] 1P-279
Highly efficient phosphorescent organic light-emitting diodes using novel iridium(Ⅲ) complexes as yellow-green dopants
서정아·공명선·이준엽†
단국대학교 ([email protected]†)
We have designed and synthesized novel Ir(Ⅲ) complexes with 2-(dibenzo[b,d]thiophen-4-yl)pyridine (DTPN) or 2- phenyl(pyrido[3,4-b]benzothiophene) (DTNP) main ligand as a yellow-green emitter. Iridium(Ⅲ) bis(2- (dibenzo[b.d]thiophen-4yl)pyridinato-N,C2)(picolinate) [Ir(DTPN)2pic] and Iridium(Ⅲ) bis(2-phenyl(pyrido[3,4-b]
benzothiophenato-N,C2)(picolinate) [Ir(DTNP)2pic] showed an emission wavelength of 541nm and 561nm, respectively. The [Ir(DTNP)2pic] dopant was evaluated as the dopant material for yellow green phosphorescent organic light-emitting diodes and high quantum efficiencies of 22.3% was obtained.
Keywords: PhOLED, iridium complex, dopant material
[정보전자 · 소재] 1P-292
Synthesis and Electroluminescent Properties of New Phenothiazyl Derivatives
강현미·김수강·이창준·이지훈*·박종욱†
가톨릭대학교,*한국교통대학교 ([email protected]†)
The starbust amine m-MTDATA or CuPc compound acting the role of the hole injection layer(HIL), has been inserted to improve device efficiency and durability. CuPc is one of the most stable HIL compound so it applies many OLEDs devices. But it absorbs slightly blue and red light, it can't use fabrication of full color display. And m-MTDATA has also disadvantage of low Tg. We propose new HIL materials by using phenothiazine moiety which is new functional group for organic materials. We synthesized the new conjugated compounds, 10,10'-Bis- (4-tert-butyl-phenyl)-10H,10'H-[3,3']biphenothiazinyl ( t-BPBP ), 10’-(4-tert-Butyl-phenyl)10'H[10,3';7'10"]
terphenothiazine (t-BPTP) and 7,7'-Diphenothiazyl-10,10’-bis-(4-tert-butyl-phenyl)-10H,10'H[3,3'] bi- phenothiazinyl (DP-t-BPBP). We characterized optical and electroluminescent(EL) properties of this material.
Keywords: OLED, HIL
[정보전자 · 소재] 1P-308
Synthesis and Properties of Poly(10-octylphenothiazine-3,7-diyl-alt-tetraoctyloxy-2,7-spirofluorene) for OLEDs
정효철·강지승·이지훈*·박종욱†
가톨릭대학교,*한국교통대학교 ([email protected]†)
Phenothiazine is a well-known heterocyclic compound including electron-riched sulfur and nitrogen hetero- atoms. Molecules and polymers containing phenoxazine or phenothiazine moieties have recently attracted much research interest because of their unique electro-optical properties and their resulting potentials in devices. We report the synthesis and properties of new phenothiazyl polymer, Poly(10-octyl-10H-phenothiazine-3,7-diyl)
(POP)(I), Poly(tetraoctyloxyspirofluorene-2,7-diyl) (PTOSF)(II) and Poly(10-octylphenothiazine-3,7-diyl-alt- tetraoctyloxy-2,7- spirofluorene)(POTOSF)(III), which were polymerized by Yamamoto reaction. We charac- terized optical properties of these materials.
Keywords: OLED, Polymer
[정보전자 · 소재] 1P-310
Synthesis of bipolar host materials for thermally activated delayed fluorescence devices
임이랑·이준엽†
단국대학교 ([email protected]†)
In this work, 3-(furo[2,3-b:5,4-b’]dipyridin-3-yl)-N,N-diphenylaniline (3TPAPFP) and 4-(furo[2,3- b:5,4-b’] dipyridin-3-yl)-N,N-diphenylaniline (4TPAPFP) were synthesized as thermally activated delayed fluorescence (TADF) host materials for green fluorescent organic light emitting diodes (OLEDs). Two bipolar hosts combined triphenylamine electron donor and pyrido[3’,2’:4,5]furo[2,3-b]pyridine (PFP) electron acceptor with high electron affinity. Green fluorescent OLEDs were fabricated by doping 1,2,3,5-tetrakis(carbazol-9-yl)- 4,6-dicyanobenzene in these host materials and maximum quantum efficiencies of 3TPAPFP and 4TPAPFP de- vices were 22.1% and 6.6%, respectively.
Keywords: thermally activated delayed fluorescence (TADF), organic light emitting diode (OLED)
[정보전자 · 소재] 1P-319
Synthesis and Characterization of Pyrrolo-perylene Derivatives: A Novel Class of Organic Semiconductors for Solution Processed Organic thin film transistors (OTFTs) 박광훈·김 란*·이기백·황문찬·임재균·안태규**·박찬언**·권순기·김윤희*,†
경상대학교 고분자공학과,*경상대학교 화학과,**포항공과대학교 화학공학과 ([email protected]†)
New pyrrolo-perylene derivatives comprising a new class of organic semiconductor were designed for solution processed OTFTs. Newly designed 2-(naphthalen-2-yl) thiophene end capped pyrrolo-perylene, 3,10-bis (5-(naphthalene-2-yl)thiophen-2-yl)-1-(2-octyldodecyl)-1H-phenanthro[1,10,9,8-cdefg]carbazole(NTPP), and bithiophene end capped pyrrolo-perylene, 3,10-bis ([2,2'-bithiophen]-5-yl)-1-(2-octyldodecyl)- 1H-phenanthro[1,10,9,8-cdefg] carbazole (BTPP), were synthesized by Suzuki coupling and Stille coupling re- action, respectively. The high mobility of BTPP is attributed to high crystallinity with “edge-on” orientation relative to the substrate based on the results of the out-of–plane XRD pattern and DFT calculation using Gaussian as well as AFM.
Keywords: OTFT, Solution process, P-channel transistor, Organic semiconductor
[콜로이드 · 계면화학] 1P-342
Microfluidic Fabrication of Uniform Liposome@Microgel Hybrid Microparticles
정은선·김민경·김진웅†
한양대학교 ([email protected]†)
Liposome has a vesicle structure that encapsulates a region of aqueous solution inside a hydrophobic lipid bilayer. However, its structure is so fragile in the presence of additives with high packing parameters that it is
critical to developing a technique to overcome this drawback. This study introduces a microfluidic approach to stably immobilize liposome in microgel particles, which is liposome@microgel system. For this, we fabricate a capillary-based microfluidic device and generate a liposome-in-oil emulsion. Basically, we observe how the flows in micro- channels affect generation of embryo emulsion drops. Finally, we characterize the particle mor- phology, membrane fluidity, and mesh property.
Keywords: liposome, microgel, microfluidic
[펄프ㆍ제지ㆍ피혁] 1P-359
고분자 전해질을 이용한 전처리에 따른 유기충전제의 특성 변화
김선영·임기백·김병호·이지영†·김철환
경상대학교 임산공학과 / 농업생명과학연구원 ([email protected]†)
최근 판지생산업체에서는 신규자원을 발굴함으로써 주원료의 사용량을 감소시키는 기술을 확보하는데 중점을 두고 있는 추세인데 이러한 기술은 건조에너지를 절약할 뿐만 아니라 국내 제지산업에서 새로운 녹색기술로 자리매김할 수 있을 것으로 판단되고 있다. 선행연구에서는 신규 유기물질로 맥주박과 팜잎을 이용하여 제조된 유기충전제의 효과를 평가했는데 유기충전제의 사용에 따라 벌크상승과 건조에너지 절감과 함께 이들의 사용에 따라 강도저하는 불가피한 것으로 나타났다. 본 연구에서는 맥주박과 팜잎 분말을 함유하고 있는 판지의 강도를 향상시키기 위해 양이온성과 음이 온성 고분자전해질을 이용하여 유기충전제 입자 표면에 고분자층을 형성시키고자 하였다. 이들의 흡착여부를 파악하기 위해 유동전위, 제타포텐셜을 측정하였고 CLSM 이미지를 통해 다층형성을 판단하였다.
Keywords: 전처리, 맥주박, 고분자전해질, 다층형성
[펄프ㆍ제지ㆍ피혁] 1P-370
펄프의 종류가 섬유의 팽윤 특성에 미치는 영향 최은연·조병욱†·원종명
강원대학교 제지공학과 ([email protected]†)
종이의 벌크는 (종이의 두께/평량)에 의해서 계산되는데, 벌크가 높다는 것은 동일한 면적에서 종이의 두께가 두껍다 는 것을 의미한다. 종이의 벌크는 펄프 섬유의 특성 및 제지 공정 인자 들에 의해서 영향을 받는다. 본 연구에서는 종이 의 제조 원가를 저감시키는 방법의 일환으로 종이의 벌크를 향상시키는 기술을 개발하고자 하였다. 벌크 향상 기술을 위한 기초 연구로 펄프의 종류가 섬유의 팽윤 특성에 미치는 영향을 평가하고자 하였다. 섬유의 형태와 화학적 특성은 섬유의 팽윤성 및 유연성에 영향을 미치고 결과적으로 이는 섬유 간 결합면적 및 종이의 벌크에 영향을 미친다. 고해 및 물에서의 자유팽윤이 침엽수 화학펄프, 활엽수 화학펄프, 화학열기계펄프의 팽윤성 및 섬유벽 구조에 미치는 영향을 토론할 것이다.
Keywords: pulp swelling, pore size, bulk
[펄프ㆍ제지ㆍ피혁] 1P-390
비목재 펄프를 혼합 이용한 화장지 제조 김정중·박종문†·정철헌*
충북대학교,*깨끗한나라 ([email protected]†)
나무를 주원료로 사용하는 펄프·제지산업은 산림의 보전 등으로 인해 점점 많은 제약을 받고 있다. 따라서 고급칩엽 수 및 활엽수 천연펄프를 대부분 수입하여 사용하는 화장지 제조업체는 펄프 수입 가격의 상승이 가장 큰 고민거리이다.
따라서 목재 펄프에 비해 저렴한 가격과 목재 의존도 축소 필요성에 따라 비목재 펄프의 혼합사용 연구가 시급한 과제이 다. 제지분야에서도 straw, bamboo, kenaf 등의 다양한 비목재 자원로 충전제와 펄프로 이용하기 위해 많은 연구를 하 고 있다. 하지만 비목재 펄프는 강도저하 및 백색도 하락, 불안정한 수급 문제를 가지고 있기 때문에 본 연구에서는 비목 재 펄프를 목재 펄프와 혼합하여 화장지 생산을 하는데 기존 화장지의 물성보다 향상 또는 유지시킬 수 있는 최적의 혼합비율을 찾고자 하였다. 실험 결과 비목재 펄프의 혼합비율을 일정한 범위 내에서 증가시켰을 때에도 기존의 화장지 의 물성과 유사한 물성을 구현할 수 있었다.
Keywords: 비목재 펄프, 화장지
[고분자] 1P-398
Synthesis and Photoalignment Properties of New Photopolymers with Different Chemical Structure
양시열·강주희·정승용·윤호규*·최경호·신교직·이상국†
한국생산기술연구원,*고려대학교 ([email protected]†)
The surface-assisted photoalignment control of liquid crystals (LC) has been attracting current attention be- cause of the practical applicability of the rubbing-free production of LC aligning film as well as various optical elements with birefringent characteristics so that the explanation of a photoaligned mechanism of the photoalign- ment control with cinnamate-based polymers is now urgently required. Recently, many studies have been exam- ined in order to improve the photoalignment properties as well as informing the mechanism of the photoalign- ment in the homo and copolymers with diverse side chain based on cinnamate group attached to flexible main chain. In this study, the two kinds of photopolymers, PM6C and PM6PC with different chemical structure between cinnamate group and alkylene spacer are synthesized and investigated the effect of different chemical structure on the photosensitivity and LC alignment properties.
Keywords: cinnamate, Photoinduced, photoalign, photosensitivity
[고분자] 1P-401
Synthesis of soluble copolyimide membranes for biogas upgrading 박채영*,**·김정훈*,†·장봉준*·박희문*·신소라*
*한국화학연구원,**충남대학교 바이오응용화학과 ([email protected]†)
Biogas emits in mixed gases composed 60-65mol% CH4, 35-40mol% CO2, 0.1-0.5 mol% H2S and traces of organic impurities. The upgrading of CH4 is very important in terms of both prevention of global warming and security of renewable energy for vehicle fuels or gas grid injection. Biogas can be efficiently upgraded by remov- ing CO2 and H2S via membrane process. The objective of this study is to develop good membrane materials with high CO2 permeability and high CO2/CH4 selectivity. We have developed novel alicyclic dianhydride-diamine (DOCDA-ODA) based copolyimides with different 20mol% of dianhydrides (6FDA, BPDA and BTDA) using m-cresol as a solvent, respectively. All synthesized copolyimides were characterized by NMR, FT-IR. The thermo mechanical properties analyzed with DSC and TGA. Then, thin dense membranes were prepared from the copo- lyimides to check their gas permeation properties. The copolyimide gas permeability coefficients(P) and ideal se- lectivities were measured with a time-lag apparatus.
Keywords: polyimide, copolyimide
[고분자] 1P-425
Synthesis and characterization of poly(epichlorohydrin-co-1,2-butylene oxide) by cationic ring opening polymerization using a tripropylene glycol initiator in toluene solvent
이재명·노시태†·권정옥·조봉상·김정수
한양대학교 ([email protected]†)
The synthesis of polymeric materials with improved properties and performance has become an attractive field of polymer science. copolymers that provide specific combinations of thermal and physical properties are the suitable materials with good performance toward extreme environmental conditions such as low temperatures and high impact condition, etc. in this study poly(epichlorohydrin-co-1,2-butylene oxide) was synthesized via cati- onic ring-opening polymerization using boron trifluoride etherate as catalyst and toluene as the solvent for the copolymerization using tripropylene glycol initiator system was used. the polymer with different molar ratio of alkylene oxide monomers and epichlorohydrin monomer were synthesized under conditions of 5℃ for 20 h in Toluene solvent. polymer characterization were performed by 1H-NMR, DSC and GPC.
Keywords: cationic polymerization, TPG
[환경ㆍ에너지] 1P-464
Graphene and Graphene Oxide and Their Uses in Barrier Polymers
유병민·신혜진·윤희욱·박호범†
한양대학교 에너지공학과 ([email protected]†)
Graphene has been highlighted for the last decade due to its excellent physical and electrical properties.
Especially, even micro-sized graphene sheets has high aspect ratio with an atomic thickness, graphene is regarded as promising nanomaterial in barrier applications. Even small molecules cannot penetrate through defect-free and single layer graphene sheet, according to simulations and experimental results. There are two major routes to use graphene and its derivatives for barrier applications; applying graphene or its derivatives, such as graphene oxide (GO) and reduced graphene oxide (rGO), on substrates and incorporation of graphene or its derivatives into the polymeric matrix as polymer nanocomposites. In this study, we focused on barrier applications using graphene and GO. As compared to other nanomaterials used in barrier applications, their advantages and current limitations were also discussed together with challenging issues and potential applications for future research.
Keywords: Graphene, Graphene Oxide, Polymer Nanocomposites, Gas Barrier
[환경ㆍ에너지] 1P-475
Preparation of mesoporous carbon supported rhodium-based catalyst
김민지·정순용†·김태완·김철웅·정광은
한국화학연구원 ([email protected]†)
석유대체 자원인 천연가스, 석탄 및 목질계 셀룰로스 등과 같이 가용량이 풍부한 바이오매스로 유래의 합성가스로부 터 열화학적인 촉매 반응을 통하여 고부가 알코올 제조 (syngas-to-alcohols, STA)가 많이 연구 되어 지고 있으며, 여기에서 다양한 다공성 촉매가 사용되고 있다. 최근에 다공성 탄소 촉매가 높은 C2 이상의 고부가 알코올 제조 촉매 담지체로 많이 연구되고 있다. 본 연구에서는 다공성 탄소 지지체에 금속 적용 시 sonochemical method를 적용하여 높은 분산도와 균일한 크기의 금속입자를 가지는 촉매를 제조함으로써 촉매활성의 향상과 알코올 선택도를 향상시키고
자 하였다. 상기 제조된 촉매는 고정층 반응기를 사용하여 STA반응을 실시함으로써 금속담지방법이 반응활성에 미치는 영향을 알아보고자 하였다. 촉매의 물리화학적 및 표면 특성을 질소 물리 흡착-탈착 등온선, X-선 회절 분석(XRD), 투과 전자현미경(TEM)을 사용하여 분석하였다.
Keywords: sonochemical, mesoporous carbon, syn gas to alcohol
[환경ㆍ에너지] 1P-481
알카놀아민계 화학상전이흡수제의 CO2 loading capacity와 반응메커니즘 연구 윤성희*,**·남성찬*·정순관*·장재언**·윤여일*,†
*한국에너지기술연구원,**서울시립대학교 ([email protected]†)
가장 범용적으로 사용하는 MEA(monoethanolamine) 수용액을 이용하여 혼합가스로부터 CO2를 분리하는 대표적 흡 수 공정인 Econamine 공정은 재생 시 3.7 GJ/tonCO2 이상의 높은 에너지가 필요한 단점이 있다. 이러한 단점을 개선하 는 다양한 방법 중에 CO2와 흡수 전후 화학상이 변하는 화학상전이 현상 이용 흡수법이 주목을 받고 있다. 화학상전이 흡수제는 기존 공정에서 흡수제 전체를 가열하는데 대신 고농도 CO2 화학상만을 재생하여 재사용 할 수 있기 때문에 재생 소요에너지를 크게 절감할 수 있다. 본 연구에서는 화학상전이 흡수제의 CO2 loading capacity 비교를 위해 반회 분식 장치를 사용하여 농도는 20wt%, 온도는 40℃, 60℃, 80℃에서 실험을 실시하였다. 반응단계별 화학종 형성 규명 을 위해 NMR분석으로 흡수 메커니즘을 증명하였다
Keywords: greenhouse gas, carbon dioxide absorbent, phase transitional
[환경ㆍ에너지] 1P-509
Reversible Solid Oxide Fuel Cell for Synthetic Fuel Production from Steam and CO2
Asif Mahmood·Saira Bano·Ji Haeng Yu*·이규호† 한국화학연구원,*한국에너지연구원
Reversible solid oxide fuel cells (RSOFCs) also known as solid oxide electrolyzers (SOECs) have gotten much attention during the last decade because of the depletion of the fossil fuel and emission of the greenhouse gases.
The present work was focussed on the development and performance evaluation of the Ni-YSZ/YSZ/LSM-73 cell for the electrochemical reduction of steam and CO2. Experiments were performed in the temperature range of 750-850℃ for both the SOFC and SOEC modes. The electrochemical performance of the cell was investigated in term of iV-curve and electrochemical impedance spectroscopy (EIS). At any temperature, a high current den- sity was observed for H2 oxidation as compared to steam or CO2 reduction under the same magnitude of the applied potential. However, the overall cell performance was found to be increased with temperature because of the favorable thermodynamics and kinetics conditions. Moreover, a slight change in the area specific resistance (ASR) with time in the electrolysis mode operation of cell for 100 hours confirms the good stability of the Ni-YSZ cermet cathode under co-electrlysis conditions.
Keywords: Reversible solid oxide fuel cell, Electrolyzer, Steam, CO2, Electorlysis
[나노] 2P-5
자기조립법을 이용한 광발광 특성을 지닌 마이크로 로드 제조
박상우·이상엽†
연세대학교 ([email protected]†)
마이크로 로드는 기존의 나노 튜브와는 다른 거대분자의 특징을 가지고 있으며, 이러한 특징으로 인해 다양한 디바이 스에서 사용되고 있다. 본 연구에서는 감광제와 형광 특성을 갖는 란탄족 이온을 활용하여 자기 조립법을 통해 마이크로 로드를 제조하고, 이의 발광 특성 및 유기물 감지에 활용 여부를 평가하였다. 감광제 및 형광 물질은 자기조립 특성을 가지고 있지 않으므로 이들을 포함하기 위한 호스트 물질로서 최근 보고된 피롤 유도체 분자의 자기조립 복합체를 사용 하였다. 자기조립 후 마이크로 로드는 감광 효과를 나타내어 란탄 이온으로 에너지 전달을 향상시켜 향상된 광발광 특성 을 나타내었다. 이에 관련된 에너지 전달 및 발광 특성, 그리고 감광제와의 영향이 형광spectroscopy를 통해 분석되었다.
제조된 마이크로 로드는 또한 피롤 분자의 선택적검출에 이용될 수 있음을 제시하였다. 발광 특성 감소는 검지물로 사용 되는 피롤의 농도가 증가함에 따라 비례적으로 나타났다. 본 연구의 결과는 자기조립법을 이용하여 광발광 특성을 지닌 마이크로 로드를 쉽게 제조하고, 이를 특정 유기 분자 검출에 활용할 수 있음을 나타낸다.
Keywords: 광발광, 자기조립
[나노] 2P-9
WO3 nanoparticle-decorated carbon nanofibers for highly sensitive NO2 gas sensor application
이준섭·서영덕·장정식†
서울대학교 ([email protected]†)
WO3 nanoparticle-decorated carbon nanofibers (CNFs) of various diameters were fabricated by single-nozzle co-electrospinning using two phase-separated polymer solutions. Using more polyvinylpyrrolidone (PVP) sol- ution decreased the CNF diameter from 130 to 40 nm and increased the Brunauer-Emmett-Teller (BET) surface area from 147 to 278 m2 g-1. The sensitivity of the hybrid CNF gas sensors increased with decreasing diameter of the CNFs; the minimum detectable level (MDL) was 1 ppm at room temperature for 40 nm hybrid CNFs dis- persed uniformly on the electrode. Furthermore, increasing the amount of decorated WO3 nanonodules on the CNF surface enhanced the sensitivity to NO2 gas. The NO2 sensor made with the hybrid CNFs had sensing per- formance comparable to those made with conventional metal oxide based nanomaterials and pristine carbon nanotubes (CNTs).
Keywords: electrospinning, carbon nanofiber, NO2 gas, chemical sensor, room temperature
[나노] 2P-21
Graphene Oxide-Nanosized Silica Hybrid Materials with High Surface Area
윤지혜·김효원·유병민·박호범†
한양대학교 ([email protected]†)
Cavity engineering has been great attraction in material sciences due to its demand for various applications such as supercapacitor, lithium battery, adsorbents, and membranes. Therefore tremendous efforts have focused the development of newly porous materials with high specific surface area. Nowadays, graphene oxide (GO) has been regarded as a starting material for porous materials due to its easy processability and tunable properties. Namely, the oxygen-functional groups offer the opportunities for chemical functionalization and the carbon provides the chances for activation to prepare porous structures. Here, we have proposed the facile method for preparing po- rous structures based on GO to introduce silica sol-gel process with chemical activation to achieve improved material porosity as well as high specific surface area. The preparing materials were studied on its chemical struc- tures, morphologies, and surface area of GO/silica hybrid with porous structures.
Keywords: Graphene Oxide, Nanosized Silica, Sol-Gel Process, Porous Structures
