• 한국의류학회지
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• 제23권4호
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• pp.584-592
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• 1999

Highly conductive polyaniline(PAn)-nylon 6 composite fabric was prepared by immersing the nylon 6 fabric in 0.5M aniline+0.35M HCl aqueous solution at 4$0^{\circ}C$ for 2hours, Polymerization was then followed by mixing the prepared oxidant and dopant solution(0.5M(NH4)2S2O+0.35M HCl) to the diffusion bath at 5$^{\circ}C$ for 30 minutes. The conductivity of prepared PAn-nylon 6 composite fabrics reached as high as 0.5$\times$10-1S/cm. Their conductivity were significantly affected by the aniline and oxidant concentration. As compared to those of nylon 6 fabric heat of fusion melting point the degree of crystallinity and tensile strength of PAn-nylon 6 did not significantly changed by inclusion of PAn. In the aspect of serviceability wheras the fabric conductivity was significantly decreased after multiple washion no significant changes in the fabric conductivity were observed after abrading the composite fabric over 50 cycles. However we found that the fabric conductivity could be recovered by acid re-doping with HCl.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2015년도 제49회 하계 정기학술대회 초록집
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• pp.224-224
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• 2015

Gel have enormous applicable region due to inherently high stretchability and bio-compatibility. Here, we fabricated highly stretchable electronic conductive organogels which have long-term stability in environment. By introducing a dialysis step which can incorporate conducting polymer, PEDOT, on the procedure of gel synthesis, residual ions inside the gel were removed. In addition, we replaced the water with organic solvent, EG, inside the gels which is high stability in air. Unlike conventional hydrogels, there are no ionic conduction occurred and electrochemically driven current was prevented during electrical voltage was applied. The fabricated organogels are hardly dried during air exposure, and only electrically conductive without any electrochemical reaction at even high voltage. In order to utilize as stretchable conductor, we demonstrated a LED array circuit using the conductive organogels as electrical interconnects. It was successfully operative even stretched up to 300% strain.

• Journal of Information Display
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• 제4권1호
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• pp.17-23
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• 2003

A thermoset type anisotropic conductive adhesive film (ACAF) comprising epoxy resin and natural butyl rubber (NBR) as the binder, micro-encapsulated imidazole as the curing agent, and Ni/Au coated polymer bead as a conductive particle has been studied. These films have been prepared to respond to requirements such as improved contact resistance, current status less of than 60 ${\mu}m$ and reliability. These films can also be used for connection between the ITO glass for LCD panel and the flexible circuit board. The curing conditions for the connection were 40, 20 and 15 seconds at 150, 170 and 190 $^{\circ}C$, respectively. The initial contact resistance and adhesion strength were 0.5 ${\Omega}/square$ and 0.4 kg/cm under the condition of 30 kgf/$^{cm}^2}$, respectively. After completing one thousand thermal shock cycling tests between -15 $^{\circ}C$ and 100 $^{\circ}C$, the contact resistance was maintained below 0.7 ${\Omega}/square$. Durability against high temperature (80$^{\circ}C$) and high humidity (85 % RH) was also tested to confirm long-term stability (1000 hrs) of the conduction.

• 한국융합학회논문지
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• 제13권4호
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• pp.331-337
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• 2022

전기자동차용 배터리 하우징 소재로 사용되고 있는 금속 소재에서 경량소재로 대체하기 위한 열가소성복합재료를 제조하였다. 매트릭스 소재는 고분자 소재인 나일론 6를 사용 하였으며 방열 성능을 부여하기 위해 열전도도가 높은 Boron Nitrate(BN)를 사용하였다. 동일한 필러의 함량 및 입자 크기에 따른 열전도성 고분자 복합재료의 방열 특성을 분석하였다. 필러의 함량이 증가할수록 열전도도 값이 증가하였으며, 입자크기가 60~70㎛인 BN의 함량이 50%인 복합재료의 경우 1.4W/mK 이상 열전도도를 나타내었다. 입자 크기가 클수록 입자 간 계면 접촉면이 넓어져 Thermal path가 이루어짐을 확인하였다. 제조된 열전도성 고분자복합재료를 이용하여 배터리 하우징을 제작하였으며 셀의 충방전 동안 온도 변화를 관찰하여 배터리 하우징의 대체 소재로서의 가능성을 확인하였다.

• 전기화학회지
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• 제19권3호
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• pp.87-94
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• 2016

나노 크기에 비해 부피 변화가 상대적으로 더 큰 서브마이크로미터 크기의 실리콘 음극의 성능 향상을 위해 도전재 역할을 하는 3,6-poly(phenanthrenequinonone) (PPQ) 전도성 고분자 바인더와 카복시기를 가져 결착력이 좋은 poly(acrylic acid) (PAA)를 블렌딩 한 복합 바인더를 도입하였다. PAA를 PPQ와 블렌딩하여 전극을 제조했을 때 결착력이 월등히 증가하였고 충방전실험 결과 PPQ 바인더를 단독으로 사용한 전극보다 안정된 수명 특성을 나타냈다. PPQ와 PAA의 함량 비율을 2:1, 1:1, 1:2(무게비)로 하여 각 전극의 수명 특성을 비교했을 때, PPQ의 함량이 가장 큰 전극(2:1, QA21)이 50번째 사이클에서 가장 좋은 용량 유지율을 보였다. 이는 PPQ가 입자 간 또는 입자와 집전체 사이에서 도전재로서 존재하여 전자가 이동할 수 있는 통로를 제공해 주고 PAA가 적절한 결착력을 제공해주어 전극의 내부 저항이 가장 작았기 때문이다. PPQ-PAA 복합 바인더를 사용한 전극은 입자 형태의 도전재인 super-P를 전체 전극 무게 대비 20%를 첨가하여 제조한 전극보다도 더 안정적인 수명 특성을 나타내었다.

• 한국재료학회지
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• 제18권12호
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• pp.664-668
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• 2008

Vapor phase polymerization of a conductive polymer on a $SiO_2$ surface can offer an easy and convenient means to depositing pure and conductive polymer thin films. However, the vapor phase deposition is generally associated with very poor adhesion as well as difficulty when patterning the polymer thin film onto an oxide dielectric substrate. For a significant improvement of the patternability and adhesion of Poly(3-hexylthiophene) (P3HT) thin film to a $SiO_2$ surface, the substrate was pre-patterned with n-octadecyltrichlorosilane (OTS) molecules using a ${\mu}$-contact printing method. The negative patterns were then backfilled with each of three amino-functionalized silane self-assembled monolayers (SAMs) of (3-aminopropyl) trimethoxysilane (APS), N-(2-aminoethyl)-aminopropyltrimethoxysilane (EDA), and (3- trimethoxysilylpropyl)diethylenetriamine (DET). The quality and electrical properties of the patterned P3HT thin films were investigated with optical and atomic force microscopy and a four-point probe. The results exhibited excellent selective deposition and significantly improved adhesion of P3HT films to a $SiO_2$ surface. In addition, the conductivity of polymeric thin films was relatively high (${\sim}13.51\;S/cm$).

• 폴리머
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• 제29권2호
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• pp.161-165
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• 2005

Octamethylcyclotetrasiloxane$(D_4)$과 1,3,5-trimethyl-1,3,5-triphenylcyclotrisiloxane$(D_3^{MePh})$을 1,1,3,3,-tetramethyl-1,3-divinylsiloxane(MVS)과 평형중합시켜 dimethylsiloxane과 methylphenylsiloxane block unit를 갖는 $\alpha,\omega-vinyl$ poly(dimethyl-methylphenyl)siloxane prepolymer(VPMPS)를 제조하였으며 또한 $D_4$와 1,3,5-trimethyl-1,3,5-trifluoropropylcyclotrisiloxane $(D_3^{M3,F3P})$을 1,1,3,3-tetramethyldisiloxane과 평형중합시켜 dimethylsiloxane과 methyltrifluoropropyl siloxane block unit를 갖는 $\alpha,\omega-hydrogen$ poly(dimethyl-methyltrifluoropropyl)siloxane prepolymer(HPDMFS)를 제조하였다. VPMPS, HPDMFS, 열전도 필터 및 촉매를 고속교반기에 가하고 $130^{\circ}C$에서 컴파운딩하여 저경도 poly(organosiloxane) rubber를 제조하였으며 이의 가교밀도는 $115^{\circ}C$에서 oscillation rheometer를 이용하여 측정하였다. 열전도성 충전제로 구상 알루미나를 Horsfield's packing model에 따라 평균입자경의 분포를 조절하여 제조한 composite TC-POXR-2의 열전도도가 1.13 W/mK, 그리고 TC-POXR-4가 1.19 W/mK였으며 이는 단일입자경을 갖는 충전제를 가하여 제조한 경우보다 높은 열전도성을 나타내었다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 C
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• pp.1878-1880
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• 2001

In order to fabricate the stable conductive polymer actuators which are operated in air. Nafion with mixture of LiCl has been used as solid polymer electrolyte material. Based on these materials, beam type and sandwich type actuators have been fabricated and mechanical properties are measured. This kind of all-solid-polymer actuator can be used for practical applications.

• Journal of Electrochemical Science and Technology
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• 제1권1호
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• pp.1-9
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• 2010

Conducting polymer films grown from various aromatic compounds have been evaluated as overcharge protecting additives for lithium ion rechargeable batteries. The polymer films were grown electrochemically under the conditions similar to those encountered during the overcharging processes of lithium batteries and subsequently characterized by potentiodynamic, electrochemical quartz crystal microbalance, electrochemical impedance spectroscopic, and scanning electron microscopic experiments. Results indicate that bicyclic and polycyclic aromatic hydrocarbons would be poor candidates for inhibitors, while biphenyl, terphenyl, and benzene derivatives displayed excellent performances. Mixed polymer films grown from o-terphenyl and p-xylene show the best performance among the candidates.

• Bulletin of the Korean Chemical Society
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• 제27권11호
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• pp.1763-1768
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• 2006

The application of poly(Co(II)-(1,8-diaminonaphthalene))(poly(Co-DAN)) and poly(1,8-diaminonaphthalene) (Poly(1,8-DAN)) to the electrocatalytic reduction of molecular oxygen was investigated, which were electrochemically grown by the potential cycling method on the glassy carbon electrodes. The reduction of oxygen at the polymer and its metal complex polymer coated electrodes were irreversible and diffusion controlled. The Poly(1,8-DAN) and Poly(Co-DAN) films revealed the potential shifts for the oxygen reduction to 30 mV and 110 mV, respectively, in an aqueous solution, compared with that of the bare electrode. Hydrodynamic voltammetry with a rotating ring-disk electrode showed that Poly(1,8-DAN) and Poly(Co-DAN) coated electrodes converted respectively 84% and 22% of $O_2$ to $H_2O$ via a four electron reduction pathway.