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Received July 24, 2014
Accepted September 4, 2014
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Ti-PCS 혼합용액의 전기방사를 통해 제조된 TiO2-SiO2 나노복합 섬유
TiO2-SiO2 Nanocomposite Fibers Prepared by Electrospinning of Ti-PCS Mixed Solution
한국세라믹기술원, 153-801 서울 금천구 가산동 233-5 1(주)솔라세라믹, 153-801 서울 금천구 가산동 233-5 2서울과학기술대학교, 139-743 서울 노원구 공릉2동 172
Korea Institute of Ceramic Engineering and Technology, 233-5 Gasan-dong, Guemcheon-gu, Seoul 153-801, Korea 1Business Incubation Center 302, Solar Ceramics Company, KICET, 233-5 Gasan-dong, Guemcheon-gu, Seoul 153-801, Korea 2Department of Materials Science and Engineering, Seoul National University of Science and Technology, 172 Gongreung 2-dong, Nowon-gu, Seoul 139-743, Korea
dgshin73@kicet.re.kr
Korean Chemical Engineering Research, June 2015, 53(3), 276-281(6), 10.9713/kcer.2015.53.3.276 Epub 2 June 2015
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Abstract
TiO2-SiO2 나노복합소재는 자체가 화학적으로 안정할 뿐만 아니라 광학적, 열적 특성이 매우 우수하여 광화학센서, 촉매 등 다양한 분야에 적용되고 있다. 이러한 구조를 구현하는 방법으로 티타늄이 첨가된 폴리카보실란(PCS) 혼합용 액을 전기방사한 후 이를 적절한 산화분위기에서 열처리하여 부직포상의 TiO2-SiO2 나노복합섬유를 만들 수 있는데, 이는 기존의 졸겔공정에 의해 제조되는 섬유보다 더 쉽고 안정적인 방법이다. 공정 중 방사된 섬유를 산화분위기에서 1200 °C 이상까지 열처리하게 되면 크리스토발라이트 기지조직 내에서 아나타제 나노결정상이 매우 균일하게 형성되었다. 또한, 열처리 후 섬유의 표면과 단면은 매우 치밀하고 매끈하였으며 10~20nm 크기의 아나타제 결정입자들이 내부에 균 일하게 분포하였다.
Nanostructured TiO2-SiO2 materials have widely been used as anti-reflecting coating, optical-chemical sensors and catalysts because of their superior optical and thermal properties as well as chemical durability. Web type SiO2 microfibers with nano-crystalline TiO2 were prepared by electrospinning of Ti-PCS mixed solution and oxidation controlled heat-treatment, rather simple than sol-gel process. Nano-crystalline anatase phase were formed for the heattreatment up to 1200 °C and they were finely dispersed in the amorphous SiO2 matrix.
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