화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.39, No.4, 655-661, July, 2015
DOI10.7317/pk.2015.39.4.655  Export Citation
전기 전도성 폴리스티렌/은 나노와이어 나노복합재료의 제조 및 물성
Preparation and Properties of Electrically Conductive Polystyrene/Silver Nanowire Nanocomposites
나효열, Manthiriyappan Sureshkumar1, 이성재†
  • 수원대학교 신소재공학과
  • 1수원대학교 화학과
Hyo Yeol Na, Manthiriyappan Sureshkumar1, and Seong Jae Lee†
  • Department of Polymer Engineering, The University of Suwon, 17 Wauan-gil, Bongdam-eup, Hwaseong, Gyeonggi 445-743, Korea
  • 1Department of Chemistry, The University of Suwon, 17 Wauan-gil, Bongdam-eup, Hwaseong, Gyeonggi 445-743, Korea
E-mail:
초록
은 나노와이어(AgNW)는 높은 형상비와 순도를 지닌 전기 전도성이 매우 우수한 나노필러이다. 본 연구에서 는 폴리스티렌(PS)과 AgNW로 구성된 나노복합재료를 응고침전법으로 제조한 후 나노복합재료의 유변물성 및 전기적 물성에 대해 고찰하였다. PS/AgNW 나노복합재료의 제조에 사용한 AgNW는 폴리올 방법으로 합성하였는데 합성한 AgNW의 평균 크기는 직경 110 nm와 길이 35 μm이었다. PS/AgNW 나노복합재료의 유변물성은 복소 점도 및 저장 탄성률로 해석하였다. 미세구조의 뚜렷한 변화를 보여주기 시작하는 유변학적 임계농도는 AgNW 0.50 vol% 로 나타났다. 이러한 미세구조의 변화는 AgNW와 PS 사슬, AgNW간의 네트워크 형성에 따른 결과로 추론된다. 전기 전도도로 평가한 전기적 물성은 AgNW 첨가에 따라 AgNW간의 네트워크 구조가 형성되면서 급격히 증가하였다. 전기적 임계농도는 AgNW 0.54 vol%에서 나타났으며, 2 vol%에서의 전기 전도도는 약 103 S/m이었다.
Silver nanowire (AgNW) is an excellent electrically conductive nanofiller having high purity and high aspect ratio. In this study, we prepared the nanocomposites composed of polystyrene (PS) and AgNWs by coagulated precipitation and investigated their rheological and electrical properties. AgNWs used in the nanocomposites were synthesized by polyol method, where the average size of the AgNWs was 110 nm in diameter and 35 μm in length. Rheological properties of the PS/AgNW nanocomposites were analyzed with complex viscosity and storage modulus. The rheological percolation threshold showing distinct change in microstructure was AgNW 0.50 vol%. This microstructural change can be attributed to the network formation between AgNW-PS chain and between AgNW-AgNW. The electrical conductivity was abruptly increased by forming network structure between AgNW-AgNW with increasing AgNWs. Electrical percolation threshold was 0.54 vol%, and the conductivity was as high as 103 S/m at 2 vol%.
Keywords:nanocomposite;silver nanowire;rheological properties;electrical properties;percolation threshold
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