Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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TiO2-SiO2 Nanocomposite Fibers Prepared by Electrospinning of Ti-PCS Mixed Solution

Ti-PCS 혼합용액의 전기방사를 통해 제조된 TiO2-SiO2 나노복합 섬유

  • Shin, Dong-Geun (Korea Institute of Ceramic Engineering and Technology) ;
  • Jin, Eun-Ju (Solar Ceramics Company) ;
  • Lee, Yoon-Joo (Korea Institute of Ceramic Engineering and Technology) ;
  • Kwon, Woo-Tek (Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Younghee (Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Soo-Ryong (Korea Institute of Ceramic Engineering and Technology) ;
  • Riu, Doh-Hyung (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
  • Received : 2014.07.24
  • Accepted : 2014.09.04
  • Published : 2015.06.01
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Abstract

Nanostructured $TiO_2-SiO_2$ 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 $SiO_2$ microfibers with nano-crystalline $TiO_2$ 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 heat-treatment up to $1200^{\circ}C$ and they were finely dispersed in the amorphous $SiO_2$ matrix.

$TiO_2-SiO_2$ 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) 혼합용액을 전기방사한 후 이를 적절한 산화분위기에서 열처리하여 부직포상의 $TiO_2-SiO_2$ 나노복합섬유를 만들 수 있는데, 이는 기존의 졸겔공정에 의해 제조되는 섬유보다 더 쉽고 안정적인 방법이다. 공정 중 방사된 섬유를 산화분위기에서 $1200^{\circ}C$ 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 균일하게 분포하였다.

Keywords

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