氧化石墨烯接枝聚乙二醇单甲醚相变材料的制备及性能

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为解决相变材料聚乙二醇单甲醚(MPEG)在使用过程中存在易泄漏和导热系数低的问题,采用化学和物理相结合的方法制备了一种以海绵状氧化石墨烯(SG)为载体的定形相变材料FSPCM.利用红外光谱仪、拉曼光谱仪、差示扫描量热仪、热台和导热系数仪对FSPCM的化学结构、相变性能、高温热定形效果进行测试.结果表明:MPEG通过物理吸附和酯化反应成功负载到SG上,当FSPCM中SG的质量分数为6% 时,其相变温度为37.5℃,熔融焓为129.7 J/g,焓值效率高达95.2%,且在250℃时仍具有较好的高温热定形效果.将FSPCM与聚丙烯(PP)共混成型后,共混材料的相变温度为32.9℃,熔融焓为12.1 J/g,共混材料的导热系数相比纯PP提高了35%,表明该定形相变材料有望应用于聚丙烯相变纤维.
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