材料科学
三乙氧基硅烷
复合材料
聚酰亚胺
石墨烯
表面改性
纳米复合材料
原位聚合
极限抗拉强度
摩擦学
聚合物
聚合
化学工程
纳米技术
工程类
图层(电子)
作者
Duxin Li,Yue Chen,Chunguang Xiao,Wenyan Yang
标识
DOI:10.1080/14658011.2018.1493274
摘要
To elucidate the improvement and the principle of graphene modification on the polyimide (PI), (3-aminopropyl) triethoxysilane-modified graphene (PMG), was designed and prepared by anchoring the (3-aminopropyl) triethoxysilane (APTS) chain on the graphene sheet surface, and used to synthesise PI composites by in situ polymerisation. The unique surface modification significantly improved the compatibility and dispersion of graphene in the PI matrix. Tensile strength and Young’s modulus of 1.0PMG/PI was 109.45 MPa and 1.73 GPa, which increased by 54.26 and 86.02% from neat PI, respectively. The tribological properties and mechanism were also discussed. The friction coefficient and wear rate of 1.0PMG/PI (0.287, 2.291×10−5mm3 Nm−1) decreased by 47.53% and 35.06%, respectively. This improvement of the tribological properties was mainly caused by the cooperative interaction of the improved mechanical and thermal properties of the composites and the high self-lubricity of modified graphene.
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