Abstract

Functionalized graphene nanosheets (GO-PA) were synthesized by a facile covalent grafting of graphene oxide (GO) with polyaminosilicone (PA). The structure and morphology of GO-PA were characterized by various measurements. In order to compare the effects of adding GO and GO-PA to thiol-ene (TE), TE/GO and TE/GO-PA nanocomposites were prepared and their fire retardancies were evaluated. The results revealed that the addition of both GO and GO-PA could improve the fire retardancy and residual char of TE nanocomposites, but GO-PA performed much better than GO. Compared with pure TE, the peak heat release rate of the TE/GO-PA nanocomposite was decreased by 31.9% and its residual char was increased from 1.16 to 2.50 wt%. Furthermore, dynamic mechanical thermal analysis showed that the grafting of GO with PA improved the dispersion of the GO sheets in the TE matrix.

摘要

通过将氧化石墨烯（GO）与聚氨基硅氧烷（PA）轻松共价接枝，合成了功能化的石墨烯纳米片（GO-PA）。通过各种测量来表征GO-PA的结构和形态。为了比较将GO和GO-PA添加到硫醇（TE）中的效果，制备了TE / GO和TE / GO-PA纳米复合材料，并评估了它们的阻燃性。结果表明，同时加入GO和GO-PA可以改善TE纳米复合材料的阻燃性和残余炭，但GO-PA的性能要比GO好得多。与纯TE相比，TE / GO-PA纳米复合材料的峰值放热率降低了31.9％，其残留碳从1.16 wt％增加到2.50 wt％。此外，