Diazonium functionalization of graphene nanosheets and impact response of aniline modified graphene/bismaleimide nanocomposites

作者：Liu Muchun; Duan Yuexin; Wang Yan; Zhao Yan^*

来源：Materials & Design, 2014, 53: 466-474.

DOI：10.1016/j.matdes.2013.07.027

• Diazonium functionalization
• Aniline modified graphene
• Reduced graphene oxide
• Bismaleimide composites
• Impact strength

For developing high performance of graphene-based nanocomposites, dispersibility of graphene sheets in matrices and interfacial interaction are challenging due to the strong tendency of agglomeration and surface inertia of graphene. Here we report an efficient way to functionalize graphene nanosheets with aniline groups on their surfaces, to attain the functionalized graphene nanosheets (FGS) by diazonium treatment following reduction of graphene oxide with hydrazine hydrate. Two kinds of nanocomposites based on diallyl bisphenol A modified bismaleimide (BMI-BA) resin which was filled with functionalized graphene and reduced graphene oxide nanosheets were prepared, and the FGS were linked with BMI resin by chemical bonds. The FGS/BMI-BA composite at a loading of 0.3 wt% revealed a 39% increase in impact strength and a slightly improvement in flexural strength, and the resulting composite remains stable at high temperature. This work provides more possibilities for incorporation of graphene into polymer matrices and an efficient method to toughening the BMI resin.

• 出版日期2014-1
• 单位北京航空航天大学