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라텍스 기법에 의한 폴리스티렌/그래핀 나노필러 나노복합재료의 제조 및 물성

Preparation and Properties of Polystyrene/Graphene Nanofiller Nanocomposites via Latex Technology

  • 염효열 (수원대학교 공과대학 신소재공학과) ;
  • 나효열 (수원대학교 공과대학 신소재공학과) ;
  • 정대원 (수원대학교 공과대학 신소재공학과) ;
  • 이성재 (수원대학교 공과대학 신소재공학과)
  • Yeom, Hyo Yeol (Department of Polymer Engineering, The University of Suwon) ;
  • Na, Hyo Yeol (Department of Polymer Engineering, The University of Suwon) ;
  • Chung, Dae-Won (Department of Polymer Engineering, The University of Suwon) ;
  • Lee, Seong Jae (Department of Polymer Engineering, The University of Suwon)
  • 투고 : 2014.10.04
  • 심사 : 2014.12.09
  • 발행 : 2015.05.25

초록

고분자 재료에 전기 전도성을 부여하기 위해 그래핀 기반의 나노필러를 도입하여 전도성 나노복합재료를 제조하였다. 그래핀 나노필러는 폴리스티렌(PS) 입자와 수계 분산이 용이하도록 산화 그래핀(GO) 및 poly(styrene sulfonate)가 도포된 환원된 산화 그래핀(PSS-RGO)을 사용하였다. GO는 흑연으로부터 modified Hummers 방법으로 합성하였으며, PSS-RGO는 GO가 분산된 PSS 용액을 hydrazine monohydrate로 환원시켜 제조하였다. 라텍스 기법으로 제조한 PS/GO 및 PS/PSS-RGO 나노복합재료의 모폴로지, 유변물성 및 전기적 물성을 고찰하였다. GO 및 PSS-RGO 나노필러는 PS 매트릭스 내에 잘 분산된 모폴로지를 보여 주었다. 그래핀 나노필러 함량에 따른 유변학적, 전기적 임계점은 GO가 0.28, 0.51 wt%로 나타났고 PSS-RGO는 0.50, 1.01 wt%로 나타났다. PS/GO 나노복합재료가 우수한 전기 전도도를 보여주는 이유는 성형시의 열처리에 의해 GO가 환원되어 전기적 물성을 부분적으로 회복했기 때문으로 판단된다.

Electrically conductive polymer nanocomposites were prepared by the inclusion of graphene-based nanofillers. Graphene oxide (GO) and reduced graphene oxide wrapped by poly(styrene sulfonate) (PSS-RGO) were used as nanofillers to make good dispersion with the aqueous dispersion of polystyrene (PS) particles. GO sheets were synthesized by the modified Hummers' method from graphite, and PSS-RGO sheets were prepared by the reduction of GO-dispersed PSS solution with hydrazine monohydrate. Morphology and properties of PS/GO and PS/PSS-RGO nanocomposites via latex technology were investigated. Both nanofillers showed well dispersed morphology in PS matrix. Rheological and electrical percolation thresholds were 0.28 and 0.51 wt% for GO, and 0.50 and 1.01 wt% for PSS-RGO respectively. It is speculated that PS/GO nanocomposites showed better conductivity than PS/PSS-RGO counterparts due to the partial recovery of GO by thermal reduction during molding.

키워드

과제정보

연구 과제 주관 기관 : 한국연구재단

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피인용 문헌

  1. Flexible free-standing composite films having 3D continuous structures of hollow graphene ellipsoids vol.23, pp.6, 2015, https://doi.org/10.1007/s13233-015-3072-7