• Polymer Science and Technology
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• v.19 no.6
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• pp.490-498
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• 2008

• Journal of the Korean Chemical Society
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• v.51 no.3
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• pp.258-264
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• 2007

Novel fluoride sensory systems have been successfully developed. Previously developed method of the fluoride-induced lactonization to fluorescent molecules was detailed, and newly developed fluoride-induced aromatic cyclization scheme was introduced. Based on the strategies using the specific affinity of fluoride to silicon, our systems are highly selective for fluoride ion. Incorporation of the developed sensor to a conjugated polymer has successfully enhanced its sensitivity to fluoride ion.

• Clean Technology
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• v.20 no.4
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• pp.415-424
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• 2014

In this study, two kinds of polymer (PPQX-2hdPTZ (P1), POPQX-2hdPTZ (P2)) were synthesised by Suzuki coupling reaction based on phenothiazine derivative as electron-donor and quinoxaline derivative as electron-acceptor. Microwave synthesis workstation was used to shorten the polymerization time and increase the degree of polymerization. The physical, thermal stability, optical and electrochemical properties of the synthesized polymer were confirmed. The thermal stability of two polymers was outstanding as the initial decomposition temperature was $323-328^{\circ}C$. And additional substituted alkoxy chain on P2 showed higher degree of polymerization. An analysis of electrochemical properties, all polymer had similar HOMO energy level values. Device was fabricated by ITO/PEDOT:PSS/active layer/$BaF_2$/Al structure and photovoltaic properties were confirmed. Each device has a different film thickness and the resulting change in PCE was confirmed. As a result the thinner thickness of the film showed a high efficiency ($PCE_{max}:P1=1.0%$, P2 = 1.1%).

• Polymer Science and Technology
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• v.18 no.4
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• pp.319-325
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• 2007

• Proceedings of the Optical Society of Korea Conference
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• 2000.02a
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• pp.104-105
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• 2000

1963년 Pope 등에 의해 anthracene 단결정에서 전기 발광(Electroluminescence, EL)이 처음 발견되었지만 실용성의 문제로 크게 각광을 받지는 못했다. 그후로 진공 증착 방법이 고안되고, 1987년 Tang 등에 의해 8-hydroxyquinoline aluminium(Alq$_3$)이라는 색소를 승화시켜 발광층으로 하는 박막 형태의 소자가 개발되면서 유기물로 만들어진 발광다이오드(LED)에 대한 연구가 활발해 졌다. 또한, 1990년 영국의 케임브리지 대학에서 공액고분자인 poly(p-phenylenevinylene)(PPV)를 이용해서 만든 LED가 개발된 이후, 고분자 LED에 대한 연구가 활발히 진행되어오고 있다. $^{(1)}$ (중략)

• Journal of Adhesion and Interface
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• v.25 no.2
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• pp.69-74
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• 2024

Soft actuators can be applied to various fields such as the medical industry and manufacturing industry due to the flexibility and smooth movement resulted from their constituent materials. Stimuli-responsive hydrogels are a class of materials that can show large volume changes due to various surrounding stimuli and thus is suitable as a soft actuator material. However, because the change in volume of the stimuli-responsive hydrogel depends on the rate of temperature change and the rate at which the solvent diffuses into the polymer network, in most typical operating conditions, the response time of the actuator is slow due to inefficient heat transfer and diffusion process. In this study, a conjugated polymer was introduced into polydiethylacrylamide, a thermoresponsive hydrogel, to implement a soft actuator driven by light, and the improvement in response time by the photothermal effect of the conjugated polymer was investigated. It was confirmed that the response time was improved by 41% by the introduction of the conjugated polymer, due to the improvement in heat transfer efficiency. Finally, a soft gripper using the hydrogel with improved response time was fabricated and the response time of the gripper was investigated.

• Polymer(Korea)
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• v.38 no.2
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• pp.188-192
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• 2014

In this work, it is possible to simply improve the molecular ordering of a conjugated polymer thin film by dipping into poor solvent. The structural order, optical, and electrical properties of poly(3-hexylthiophene) (P3HT) films were profoundly influenced by dipping time and solubility of solvent. Especially the dipping time in methylene chloride was controlled to efficiently improve the molecular ordering of the P3HT. The correlation between the structural order and the electrical properties was used to optimize the dipping time in the appropriate solvent.

• Proceedings of the Korean Fiber Society Conference
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• 2002.04a
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• pp.437-438
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• 2002

Poly(vinylidene fluoride)(PVDF)는 우수한 화학적 특성을 갖는 불소계 고분자로서 엔지니어링 플라스틱, 압전성 소재 및 봉합사용 소재로 이용되고 있다. 최근에는 PVDF의 화학적 개질을 통하여 전도성 고분자나 탄소섬유화 등의 기능성 소재로 만들려는 연구가 흥미롭게 이루어지고 있다. PVDF를 알칼리 처리하여 주쇄에 공액이중결합을 도입함으로써 전도성 고분자용 소재 또는 접착력이 개선된 PVDF 소재를 만들 수 있다. (중략)

• Proceedings of the Korean Fiber Society Conference
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• 2003.10b
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• pp.159-160
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• 2003

금속과 유사한 전도성을 가진 공액이중결합의 전기전도성 고분자를 사용한 Langmuir-Blodett (LB) 막의 제조에 관한 연구는 그 범위가 넓으며, 지금까지 많은 연구 논문들이 보고되고 있다[1]. 특히 전도성이 뛰어난 polyaniline, polypyrrole, polythiophene은 전도성과 stability가 우수하여 전기 전도성 LB 막에 대한 연구들이 많이 진행되어 왔다[2]. 본 연구에서는 이와 같은 전기전도성 유기물질을 사용한 전도성 LB막이 수직방향에 비해 수평방향의 전기전도도가 크다는 전기적 장점을 이용하여 전도성 LB막을 제조하기 위해 새로운 전도성 고분자를 합성하여 전기 전도성을 띄는 LB 막을 제조하였다[3,4]. (중략)

• Proceedings of the Korean Fiber Society Conference
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• 2007.11a
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• pp.459-460
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• 2007

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