화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.14, No.1, 76-81, February, 2003
Export Citation
나노구조 카본블랙/HDPE 복합재료의 전기적 특성: 실란 처리된 카본블랙이 PTC 특성에 미치는 영향
Electrical Behavior of Nanostructured Carbon Black-filled HDPE Composites: Influence of Silane Treatment of Carbon Blacks on PTC Characteristics
박수진†, 송수완, 서민강, 김은경, 신재섭1
  • 한국화학연구원 화학소재연구부, 대전 305-600
  • 1충북대학교 화학과, 청주 361-763
Soo-Jin Park†, Su Wan Song, Min-Kang Seo, EunKyoung Kim, and Jae-Sup Shin1
  • Advanced Materials Division, Korea Research Institute of Chemical Technology, Daejeon 305-600, Korea
  • 1Department of Chemistry, Chungbuk Nationa University, Chongju 361-763, Korea
E-mail:
초록
본 연구에서는 전기 전도성을 띠는 CB/HDPE 나노 복합재료의 NTC (negative temperature coefficient )현상을 제거하기 위하여 카본블랙을 실란 커플링제 0.1 ~ 0.5 wt%의 함량비로 처리하였다. 실란 처리한 카본블랙의 표면특성 변화는 FT-IR을 통하여 확인하였으며, 카본블랙 함량과 입자크기에 따른 PTC(positive temperature coefficient) 현상의 변화를 관찰하였다. 실험 결과, 실란 처리된 카본블랙은 3450 cm-1과 1100 cm-1영역에서 Si-OH피크와 Si-O-CH 피크를 각각 나타내었으며, 이는 실란 커플링제가 카본블랙의 표면에 효과적으로 도입되었음을 보여준다. 가장 큰 PTC 세기를 나타내는 경우는 카본블랙의 함량 30 wt%와 입자크기 80 ~ 90 nm로 만든 복합 재료였다. 또한, 실란 처리를 통해 CB/HDPE 복합재료의 NTC 현상이 사라짐을 확인할 수 있었는데, 이는 카본블랙과 수지간의 계면 결합력 향상에 따른 복합재료 내 카본블랙 입자들의 유동성이 감소하였기 때문이라 사료된다.
In this study, the silane coupling agent was used for the surface treatment of carbon blacks (CB) to reduce the negative temperature coefficient (NTC) of conductive CB/HDPE nanocomposites in the content of 0.1 ~ 0.5 wt%. The change in surface properties of carbon blacks was investigated by using FT-IR spectrometer. Also, the effects of CB content and particle size on positive temperature coefficient (PTC) behavior of the nanocomposites were studied. From FT-IR absorption spectra results, the silane treatment on CB showed the absorption bands at 3450 cm-1 for νSi-OH and 1100 cm-1 for νSi-O-CH, respectively. This meant that silane coupling agent was effectively introduced on carbon black surfaces. The largest PTC intensity of the composites exhibited on the CB contents of 30 wt% and particle size of 80 ~ 90 nm. It was also found that the silane treatment promoted the disappearance of NTC phenomenon. This was probably due to the reduction of mobility of CB particles in the composites, resulting from the improved interfacial binding force between CB and polymer.
Keywords:silane coupling agent;carbon blacks(CB);negative temperature coefficient (NTC);positive temperature coefficient (PTC);interfacial binding force
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