화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.40, No.5, 804-812, September, 2016
DOI10.7317/pk.2016.40.5.804  Export Citation
SiC 마이크로입자와 그래핀 옥사이드가 그래프트된 SiC 나노입자를 포함하는 감압점착제의 열전도도 향상
Enhanced Thermal Conductivity of Pressure Sensitive Adhesives Using Hybrid Fillers of SiC Microparticle and SiC Nanoparticle Grafted Graphene Oxide
부민칸, 박규대, 배영한, 김성룡†
  • 한국교통대학교 나노화학소재공학과
Minh Canh Vu, Gyu-Dae Park, Young-Han Bae, and Sung-Ryong Kim†
  • Department of Polymer Science and Engineering, Korea National University of Transportation, Chungju 27469, Korea
E-mail:
초록
SiC 마이크로입자를 주필러로 사용하고 그래핀 옥사이드가 그래프트된 SiC 나노필러를 보조필러로 사용한 UV 경화형 감압점착제의 열전도도에 대하여 연구하였다. 개질된 SiC 나노필러와 그래핀 옥사이드를 결합시킨 필러(mSiCnano-GO)를 도입한 결과 필러의 침전이 발생하지 않는 균일한 분산을 얻었다. 전체 필러의 함량을 고정시킨 상태에서 SiC 마이크로입자를 mSiCnano-GO로 0.5-2.0 wt% 대체하여 감압점착제의 열전도도와 점착력의 현저한 증가를 관찰하였으나, mSiCnano-GO의 함량이 증가함에 따라 감압점착제의 박리강도는 감소하였다. 40 wt%의 하이브리드 필러를 포함하는 감압점착제의 열전도도는 0.68 W/m·K로 순수 점착제에 비하여 325% 증가하였다. 이와 같은 증가는 보조필러와 기재와의 화학결합과 SiC 마이크로필러와 mSiC-GO 사이에 형성된 열전달 경로 때문으로 여겨진다.
Thermal conductivity of UV-crosslinked pressure sensitive adhesives (PSAs) using SiC microparticle as a main filler and SiC nanoparticle grafted graphene oxide (mSiCnano-GO) as an auxiliary filler have been investigated. The introduction of mSiCnano-GO resulted in a homogeneous distribution of fillers without the sedimentation of SiC microparticle. The thermal conductivity and initial tack of PSAs was significantly increased with substituting 0.5-2.0 wt% of mSiCnano-GO filler for SiC microparticle at a fixed total weight fraction of fillers in PSAs, however, the peel strength of PSAs decreased with increasing the mSiCnano-GO fillers. The PSAs showed the thermal conductivity of 0.68 W/m·K at 40 wt% of hybrid filler content which is a 325% improvement compared to the bare-PSA. It is speculated that the enhancement is due to the auxiliary filler chemically bonded with matrix and the facile formation of heat paths between SiCmicro and mSiCnano-GO.
Keywords:pressure sensitive adhesives;hybrid fillers;thermal conductivity;graphene oxide;grafting
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