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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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原位无规共缩聚制备高性能石墨烯/聚酰亚胺纳米复合材料
DOI: 10.11777/j.issn1000-3304.2015.15090, PP. 1402-1413
Keywords: 原位无规共缩聚,石墨烯,聚酰亚胺,纳米复合材料
Abstract:
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(rGO-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(rGO/PI)纳米复合材料.通过对rGO-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rGO-NH2的加入量为2wt%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46.7K,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rGO-NH2的加入量对相关性能的影响.
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