高分散性氧化石墨烯基杂化体的制备及其热稳定性增强

摘要

利用有机偶联剂,通过酯化反应合成了聚乙二醇单甲醚(MPEG750)修饰的功能性氧化石墨烯纳米材料(GO-MPEG750),实现了氧化石墨烯基纳米杂化材料在任意极性及非极性溶剂中的高分散性能.利用溶剂共混技术所制聚合物复合材料中,作为纳米填料的GO-MPEG750只需质量分数1％的负载量就可以显著地提高聚乙二醇(PEG4000)的热稳定性,起始降解温度提高了63℃.该材料在阻燃材料等领域具有一定的潜在应用价值.%Graphene oxide (GO) was modified with polyethylene glycol mono-methyl ether 750 (MPEG750) by esterification to increase its dispersibility in solvents and a GO/PEG-4000 composite was prepared by solution blending. Results showed that the GO-MPEG750 is dispersible in both polar and nonpolar solvents. The thermal stability of the PEG4000 could be improved significantly by adding as little as 1 mass% of the GO-MPEG750 in PEG44300 as a nanofiller. The incipient degradation temperature was increased by 63 ℃ for the composite, suggesting a promising use of dispersible GO-MPEG750 to increase the thermal stability of flame retardants in industry.