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2-Methacryloxyethyl dimethyl 2-hydroxyethyl ammonium bromide를 이용한 고분자 습도센서의 감습 특성 및 신뢰성
이칠원,공명선,Lee, Chil-Won,Gong, Myoung-Seon 한국공업화학회 1999 공업화학 Vol.10 No.3
암모늄염을 포함하는 고분자 습도센서를 2-methacryloxyethyl dimethyl 2-hydroxyethyl ammonium bromide (MDHAB)/MMA/DAEMA=6/3/1의 공중합체로부터 제조하였다. 감습막은 금/알루미나 전극에 침적법에 의하여 도포하였으며 $5^{\circ}C$, 40%RH, 70%RH, 그리고 90%RH에서 전형적인 임피던스는 각각 $298k{\Omega},\;11k{\Omega}$, 그리고 $2.3k{\Omega}$을 나타내어 감습특성은 저온에서 사용되는 습도 센서로서의 특성에 적합하였다. 온도 의존성 계수는 $5{\sim}20^{\circ}C$에서 $-0.80%RH/^{\circ}C$이었으며 히스테리시스는 ${\pm}2%RH$ 이내에 존재하였다. 응답 속도는 34%RH에서 88%RH로 변화할 때 38초였다. 신뢰성 시험으로서 온도 사이클, 습도 사이클, 고온 고습 저항성, 전기 인가, 장기 방치, 그리고 내수성을 측정하여 습도센서로서의 응용성을 평가하였다. The humidity sensor containing ammonium salt was prepared from the copolymer of 2-methacryloxyethyl dimethyl 2-hydroxyethyl ammonium bromide (MDHAB)/MMA/DAEMA = 6/3/1. The humid membrane was fabricated on the gold/alumina electrode by dipping. The impedances were $298k{\Omega},\;11k{\Omega}$, and $2.3k{\Omega}$ at 40%RH, 70%RH and 90%RH, respectively, at $5^{\circ}C$ and the humidity-sensitive characteristics were suitable for low temperature humidity sensor. The temperature-dependent coefficient between $5^{\circ}C$ and $20^{\circ}C$ was found to be $-0.80%RH/^{\circ}C$ and the hysteresis falled in the ${\pm}2%RH$ range. The response time was found to be 38 sec for the relative humidity ranging from 34%RH to 88%RH at $20^{\circ}C$. The reliabilities such as temperature cycle, humidity cycle, high temperature and humidity resistance, electrical load stability, stability of long-term storage and water durability were measured and evaluated for the application as a humidity sensor.
유기 염료-무기 실리카 하이브리드 안료의 제조와 분산잉크로서 응용
전영민,김종규,공명선,Jeon, Young-Min,Kim, Jong-Gyu,Gong, Myoung-Seon 한국재료학회 2006 한국재료학회지 Vol.16 No.7
Studies were performed on preparation of organic-inorganic hybrid silica dye in a dispersing ink system. The silica was subjected to surface modification using 3-aminopropyltrimethoxysilane (APTMS) in order to promote the chemical reactivity of the raw silica. On the surfaces of the aminosilane-functionalised silica, red vinylsulfone-containing azo dye was adsorbed. The dye was found to have chemically reacted with the aminosilane-grafted silica surface, which was proven by FT-IR spectra. Studies on morphology and microstructure were performed employing scanning electron microscopy. The SEM micrographs and particle size distributions showed that a homogeneous pigment can be obtained employing silica as a core. Particle size distribution was also examined using the technique of dynamic light scattering. The ensuing pigment was subjected to various physicochemical evaluation such as inkjet property, storage stability, color change as inkjet ink using printer, spectrophotometric, microscopic techniques. Studies on hybrid dyes from the silica surface demonstrated that, in general, stable pigments for inkjet dispersion ink were obtained.
졸-겔법을 이용한 실리카 핵을 가지는 하이브리드 안료의 제조와 잉크젯 분산 잉크로서 응용
전영민,김종규,공명선,Jeon, Young-Min,Kim, Jong-Gyu,Gong, Myoung-Seon 한국재료학회 2006 한국재료학회지 Vol.16 No.10
N-(3-triethoxysilylpropyl)-1,4-diaminoanthrquinone-2,3-dicarboximide (TESP-DADI), an organic blue pigment, has been prepared and incorporated into silica solid matrix reacting triethyl orthosilicate (TEOS) via sol-gel method. Morphology and microstructure of resulting hybrid pigment were studied employing SEM and TEM. The micrographs and particle size distributions showed that uniform pigment can be obtained employing TEOS-based sol-gel method forming silica core. Particle size distribution of dispersed pigment in water was examined using the technique of dynamic light scattering. The ensuing pigment dispersion ink was subjected to various physicochemical evaluation such as viscosity, surface tension, inkjet stability, storage stability, and color change as inkjet ink using spectrophotometric, and microscopic techniques.
새로운 Poly ( enaryloxynitriles ) 의 합성과 그 열적 성질
김병구,배장순,공명선 ( Byung Gu Kim,Jang Soon Bae,Myoung Seon Gong ) 한국공업화학회 1995 공업화학 Vol.6 No.4
주쇄에 다양한 화학 구조를 가진 새로운 poly(enaryloxynitriles)을 p-bis(1-chloro-2,2-dicyanovinyl)benzene (2)과 sulfide, sulfone, azo, acetal, imide, ether 그리고 ester 결합을 포함한 디 페놀 유도체의 나트륨 염과 계면중합에 의하여 합성하였다. 생성된 중합체는 고유 점도가 0.12∼0.45 dL/g이었으며 중량 평균 분자량은 9000∼12000이었다. 그들 중합체는 극성 반양자성 용매에 매우 잘 녹았으며 alkyl, acetal, ester를 가진 diphenol로부터 합성된 중합체는 THF나 aceton에도 매우 잘 녹았다. 그러나 중합체의 DMF 용액으로 부터 용매 증발후 단단하고 부서지시 쉬운 막이 형성되었다. 중합체들은 350℃에서 열경화 반응이 진행되어 불용성 물질이 형성되었다. 거의 모든 중합체가 350∼450℃사이에서 10% 중량 감량을 유지하였으며, 500℃에서 잔사량은 70∼85%로서 열안정성을 보여주었다. New poly(enaryloxynitriles) with a variety of chemical structure in the main chain were prepared by interfacial polymerization of p-bis(1-chloro-2,2-dicyanovinyl) benzene (2) with disodium salts of diphenol derivatives containing sulfide, sulfone, azo, acetal, imide, ether and ester group. The resulting polymers possess inherent viscosities of 0.12∼0.45 dL/g and Mw in the range 9000∼12000. They are easily soluble in polar aprotic solvents. The polymers derived from diphenols with alkyl, acetal and ester units were even soluble in common organic solvents such as THF and acetone. Brittle and hard films can be cast from DMF solutions. These polymers show a large exotherm in differnetial scanning calorimetry and undergo a curing reaction around 350℃ to form insoluble materials. Almost all the poly (enaryloxynitriles) retained a 10% weight loss being recorded between 350∼450℃ in nitrogen and displayed 70∼85% residual weight at 500℃.
광가교성 Sulfonated Polyimide 전해질 고분자를 이용한 습도센서의 제조 및 특성 분석
임동인(Dong In Lim),공명선(Myoung Seon Gong) 한국고분자학회 2012 폴리머 Vol.36 No.4
칼콘기를 포함하는 광가교성 sulfonated polyimide(SPI) 전해질 고분자를 칼콘기를 가지는 실란 커플링제가 처 리된 알루미나 전극에 도포하여 습도센서를 제조하였다. SPI 필름 중 bis(tetramethyl)ammonium 2,2`-benzidinedisulfonate (Me4N-BDS)/4,4`-diaminochalcone(DAC)/pyromellitic dianhydride(PA)= 90/10/100 이루어진 습도센서는 20과 95 %RH 영역에서 4.48부터 2.1 kΩ까지 변화하며 좋은 직선성(Y = -0.04528X+7.69446, R2 = 0.99675)을 보여주었다. 33 %RH 와 94 %RH 사이에서 흡습과 제습과정의 응답속도는 약 79초이며, 가교화된 SPI 필름은 습도를 빠르게 검지할 수 있는 매우 효율적인 감습재료이다. 온도 의존성 계수는 -0.49 %RH/˚C이며 습도센서로서 응용시 온도 보상이 필요하다. 또한 센서의 기재를 칼콘을 포함하는 실란 커플링제로 처리한 센서는 가교와 동시에 기재에 접합되어 480시간 이상 내수성, 고온과 고습 안정성 및 장기 안정성이 뛰어남을 알 수 있었다. 이렇게 가교화된 SPI는 상용화된 센서 보다 우수한 특성을 보이는 재료로서 응용 가능성을 보여주었다. Photocurable sulfonated polyimide (SPI) polyelectrolyte containing chalcone group was prepared and fabricated on an alumina electrode pretreated with chalcone-containing silane-coupling agent. SPI films with bis(tetramethyl)ammonium 2,2`-benzidinedisulfonate (Me4N-BDS)/4,4`-diaminochalcone (DAC)/pyromellitic dianhydride (PA)= 90/10/100 possessed very linear response(Y = -0.04528X+7.69446, R2 = 0.99675) and showed resistance changing from 4.48 to 2.1kΩ between 20 and 95 %RH. The response time for absorption and desorption measurements between 33 and 94 %RH% was about 79 s, which affirmed the high efficiency of crosslinked SPI film for rapid detection of humidity. A negative temperature coefficient showing -0.49 %RH/˚C was found and proper temperature compensation should be considered in future applications. Moreover, pretreatment of the substrates with chalcone-containing silane-coupling agent was performed to improve the water durability and the stability of the humidity sensors at a high humidity and a high temperature and long-term stability for 480 h. The crosslinked SPI films anchored to electrode substrate could be a promising material for the fabrication of efficient humidity sensors with superior characteristics compared to the commercially available sensors.