• 文献标题:   Graphene and poly(ionic liquid) modified polyurethane sponges with enhanced flame-retardant properties
  • 文献类型:   Article
  • 作  者:   WEI HJ, ZHU ZQ, SUN HX, MU P, LIANG WD, LI A
  • 作者关键词:   graphene, ionic liquid, polyurethane
  • 出版物名称:   JOURNAL OF APPLIED POLYMER SCIENCE
  • ISSN:   0021-8995 EI 1097-4628
  • 通讯作者地址:   Lanzhou Univ Technol
  • 被引频次:   7
  • DOI:   10.1002/app.45477
  • 出版年:   2017

▎ 摘  要

Graphene (Gr) and poly(ionic liquid) (PIL) modified polyurethane (PU) sponges with enhanced flame-retardant properties were prepared by the direct dip coating of Gr and ionic liquid (IL) monomers onto a PU sponge followed by the polymerization of IL monomers under thermal initiation. With a content of 1.5% Gr in IL, the limiting oxygen index (LOI) of PU-PIL-Gr was 26.1%, whereas the neat PU sponge showed an LOI of only 17.9%. The horizontal flame test results indicate that PIL-Gr prevented horizontal flame spread and eliminated melt dripping. Compared with that of the neat PU sponge, the peak heat release rate of PU-PIL-Gr decreased about 22.0%. These improvements on flame retardancy might have been due to a hybrid flame retardant originating from Gr (which acted as carbon source) and PIL (which contained the flame-retardant elements) in the PU sponge and the formation of protective layers, which isolated the oxygen and heat more effectively. (c) 2017 Wiley Periodicals, Inc.