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- Title
Graphene and poly(ionic liquid) modified polyurethane sponges with enhanced flame-retardant properties.
- Authors
Wei, Huijuan; Zhu, Zhaoqi; Sun, Hanxue; Mu, Peng; Liang, Weidong; Li, An
- Abstract
ABSTRACT 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. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45477.
- Subjects
POLYMERIZED ionic liquids; SPONGE (Material); GRAPHENE; FIREPROOFING agents; SURFACE coatings; POLYMERIZATION
- Publication
Journal of Applied Polymer Science, 2017, Vol 134, Issue 44, pn/a
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.45477