• 文献标题:   Compatible cyclophosphazene-functionalized graphene hybrids to improve flame retardancy for epoxy nanocomposites
  • 文献类型:   Article
  • 作  者:   QU LJ, SUI YL, ZHANG CL, LI PH, DAI XY, XU BS
  • 作者关键词:   flame retardancy, compatibility, graphene, epoxy composite, phosphazene
  • 出版物名称:   REACTIVE FUNCTIONAL POLYMERS
  • ISSN:   1381-5148 EI 1873-166X
  • 通讯作者地址:   Jilin Univ
  • 被引频次:   0
  • DOI:   10.1016/j.reactfunctpolym.2020.104697
  • 出版年:   2020

▎ 摘  要

To construct effective interfacial interactions between graphene-based flame retardants and epoxy resin (EP) matrixes, reactive cyclophosphazene was chemically synthesized with amino groups and grafted on graphene oxide (GO) to prepare a flame-retardant fGO nanosheets for EP nanocomposites. The obtained fGO presented good compatibility and endowed the composites with improved thermal stability and dynamic mechanical properties. With a low content of 1.0 wt.% fGO added, the EP nanocomposites exhibited distinctly lowered the peak of heat release rate, total heat release, and total smoke production by 49.0%, 21.1%, and 51.9%. Compact char residue layers and suppressed volatile products indicated the formation of protective char structures derived from fGO nanofillers. The flame-retardant mechanisms were investigated and ascribed to the effects in condensed and gas phases from phosphazene modified graphene components.