• 文献标题:   Free-standing graphene films embedded in epoxy resin with enhanced thermal properties
  • 文献类型:   Article
  • 作  者:   BUSTERO I, GAZTELUMENDI I, OBIETA I, MENDIZABAL MA, ZURUTUZA A, ORTEGA A, ALONSO B
  • 作者关键词:   functional composite, nanocomposite, polymermatrix composites pmcs, thermal propertie, scanning electron microscopy sem
  • 出版物名称:   ADVANCED COMPOSITES HYBRID MATERIALS
  • ISSN:   2522-0128 EI 2522-0136
  • 通讯作者地址:   TECNALIA
  • 被引频次:   5
  • DOI:   10.1007/s42114-020-00136-6
  • 出版年:   2020

▎ 摘  要

The poor thermal conductivity of polymer composites has long been a deterrent to their increased use in high-end aerospace or defence applications. This study describes a new approach for the incorporation of graphene in an epoxy resin, through the addition of graphene as free-standing film in the polymeric matrix. The electrical and thermal conductivity of composites embedding two different free-standing graphene films was compared to composites with embedded carbon nanotube buckypapers (CNT-BP). Considerably higher thermal conductivity values than those achieved with conventional dispersing methods of graphene or CNTs in epoxy resins were obtained. The characterisation was complemented with a study of the structure at the microscale by cross-sectional scanning electron microscopy (SEM) images and a thermogravimetric analysis (TGA). The films are preconditioned in order to incorporate them into the composites, and the complete manufacturing process proposed allows the production and processing of these materials in large batches. The high thermal conductivity obtained for the composites opens the way for their use in demanding thermal management applications, such as electronic enclosures or platforms facing critical temperature loads.