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将依次经过化学改性和还原得到的含有自由氨基的氧化石墨烯(r GO-NH2)作为共聚单体,与商品化的二胺单体和二酐单体在相关有机溶剂中进行原位无规溶液共缩聚得到前驱体溶液,然后在玻璃板上流延成膜后再进行热酰亚胺化得到一系列不同含量的还原的氧化石墨烯/聚酰亚胺(r GO/PI)纳米复合材料.通过对r GO-NH2的化学结构、组成和微观形貌的一系列测试和表征来证实上述改性和还原,以及为后续的聚合反应奠定基础.通过对所得纳米复合材料的性能进行测试后发现:当r GO-NH2的加入量为2 wt%时,其Tg、在N2和空气气氛中的T5%较PI分别升高了17.9、32.7和46.7 K,拉伸强度、拉伸模量和断裂伸长率分别增加了40.6%、16.7%和187.8%.除此之外,它的平均接触角(SCA)值增加到103.8°.与此同时,通过观察微观结构形貌来进一步了解r GO-NH2的加入量对相关性能的影响.
The free amino group-containing graphene oxide (rGO-NH2) obtained by chemical modification and reduction in that order was used as a comonomer in the presence of a commercially available diamine monomer and a dianhydride monomer in a related organic solvent The solution was co-condensed to obtain a precursor solution, which was then film-cast on a glass plate and then thermally imidized to obtain a series of different reduced GO / PI nanocomposites .A series of tests and characterization of the chemical structure, composition and morphology of r GO-NH2 were used to confirm the above modification and reduction and to lay the foundation for the subsequent polymerization.After the properties of the obtained nanocomposites were tested It was found that the Tg, the T5% in N2 and air atmosphere increased by 17.9, 32.7 and 46.7 K, respectively, when r GO-NH2 was added at 2 wt%, and the tensile strength, tensile modulus and Elongation at break increased by 40.6%, 16.7% and 187.8% respectively. In addition, its average contact angle (SCA) increased to 103.8 °. In the meantime, further study of the morphology of the microstructures by r Effect of -NH2 Addition on Related Performance.