尼龙6基碳纤维/石墨烯多尺度复合材料的力学与导电性能

Mechanical and electrical properties of nylon-6-based carbon fiber/graphene multiscale composites

为了提高尼龙6的力学强度与导电性能,设计合成了1种聚二烯丙基二甲基氯化铵(PDDA)改性石墨烯包覆碳纤维(CF)复合填料。通过太阳光极化剥离氧化石墨的方式制备石墨烯,并利用聚合电解质进行表面改性。采用酸氧化表面处理CF,通过静电吸引自组装合成多尺度结构石墨烯/CF复合填料(C-SG)。复合材料断裂面形貌的SEM图像观察结果表明,与CF和石墨烯相比,C-SG在PA6基体中具有更好的分散性和相容性。此外,复合材料的冲击强度、弯曲响度以及导电性能均得到了不同程度的提升。

To improve the mechanical strength and electrical conductivity of nylon-6（PA6）,the composite filler of modified graphene-coated carbon fiber using poly（diallyldimethylammonium chloride）（PDDA）was designed and synthesized The graphene was prepared by the polarized exfoliation of graphite oxide（GO）using sunlight,then its surface was modified by apolyelectrolyte.The surface of carbon fiber（CF）was functionalized by acid oxidization.The multiscale structure was realized via electrostatic interaction between the positively charged solar graphene（SG）and oppositely charged CF by homogeneous mixing.Scanning electron microscopy images of the fracture surface of the PA6 composites show that the carbon fiber-graphene multiscale structure possesses better dispersion and compatibility than those of individual CF and SG.In addition,the impact strength,bending properties and electrical conductivity of the PA6 composites are enhanced to some degree.