• 文献标题:   Polymer-stabilized graphene dispersions at high concentrations in organic solvents for composite production
  • 文献类型:   Article
  • 作  者:   WAJID AS, DAS S, IRIN F, AHMED HST, SHELBURNE JL, PARVIZ D, FULLERTON RJ, JANKOWSKI AF, HEDDEN RC, GREEN MJ
  • 作者关键词:  
  • 出版物名称:   CARBON
  • ISSN:   0008-6223 EI 1873-3891
  • 通讯作者地址:   Texas Tech Univ
  • 被引频次:   170
  • DOI:   10.1016/j.carbon.2011.09.008
  • 出版年:   2012

▎ 摘  要

We demonstrate a simple and effective technique for dispersing pristine (unfunctionalized) graphene at high concentrations in a wide range of organic solvents by use of a stabilizing polymer (polyvinylpyrrolidone, PVP). These polymer-stabilized graphene dispersions are shown to be highly stable and readily redispersible even after freeze-drying. This technique yields significantly higher graphene concentrations compared to prior studies. An excellent increase in the thermal conductivity of the fluid by the addition of pristine graphene is also demonstrated. These well-dispersed pristine graphene sheets were then used as a strong and conductive nano-filler for polymer composites. Graphene/PVP composites were produced by the bulk polymerization of N-vinylpyrrolidone loaded with dispersed graphene, resulting in excellent load transfer and improved mechanical and electrical properties. (C) 2011 Elsevier Ltd. All rights reserved.