中文摘要：

通过静电吸附的方法在玻璃纤维（GF）表面包覆了乙烯-马来酸酐共聚物（EMA）或／和多壁碳纳米管（MWCNT），制备得到了GF-EMA、GF-MWCNT和GF-EMA-MWCNT3种混杂增强体，并采用熔融共混将3种增强体用于改性尼龙6（PA6）和尼龙6／碳纳米管（CNT）复合体系．结果表明，玻璃纤维表面的EMA能够使PA6分子链产生交联结构，并有效改善GF与PA6之间的界面结合，因此显著提高复合材料的力学性能．与GF增强PA6体系相比，PA6／GF-EMA复合体系的拉伸强度、弯曲强度和模量分别提高了11．4％、21．5％和28．9％．GF-MWCNT混杂结构由于玻璃纤维表面存在致密的、分散均匀的MWCNT导电网络，能够有效地提升PA6／CNT复合体系的导电性能，相比于GF增强的PA6／CNT复合材料，GF-MWCNT增强体系的表面电阻率下降了约2个数量级．GF-EMA-MWCNT混杂结构能够结合GF-EMA和GF-MWCNT两者的功效，其增强的复合材料具有优异的力学和导电性能．

英文摘要：

The surfaces of glass fiber were coated with ethylene-maleic anhydride copolymer or/and muhiwalled carbon nanotube through electrostatic absorption method, thus GF-EMA, GF-MWCNT and GF- EMA-MWCNT hybrid reinforcements were prepared. Nylon 6 and nylon 6/carbon nanotube based composites reinforced with as-prepared hybrid reinforcements were fabricated by meh mixing. The results have shown that the acid anhydride groups of the EMA copolymer can react with the amino groups of the PA6 resin to form cross-linked structures. Meanwhile,the EMA on the glass fiber surfaces can significantly improve the interracial adhesion between GF and PA6 matrix, thus enhance the mechanical properties of the GF-EMA reinforced composites. Compared to PA/GF composites, the measured tensile strength, flexural strength and modulus of PA/GF-EMA composites increased by 11.4% , 21.5% and 28.9% , respectively. The incorporation of GF- MWCNT reinforcements effectively enhanced the electrical properties of PA6/CNT composites due to the compact and well-dispersed MWCNT conductive network formed on the fiber surfaces. The surface electrical resistivity of GF-MWCNT reinforced PA6/CNT composites was reduced by about 2 orders of magnitude compared to that of the PA6/GF/CNT composites. The GF-EMA-MWCNT hybrid structures can combine the modification effect of GF-EMA and GF-MWCNT structures, thus the GF-EMA-MWCNT reinforced composites exhibited improvements of mechanical and electrical properties at the same time.