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利用静电相互作用在玻璃纤维(GF)表面分别复合纳米二氧化硅(SiO2)和多壁碳纳米管(MWNTs),制备了GF-SiO2、GF-MWNTs复合增强体,并通过转矩流变仪制备了尼龙6(PA6)/GF-SiO2和尼龙6(PA6)/GF-MWNTs复合材料.利用扫描电子显微镜(SEM),示差扫描量热仪(DSC),热机械分析仪(DMA)等手段研究了复合材料的微观结构、热学及力学性能.结果表明,静电复合的方法可以使纳米二氧化硅(nano-SiO2)、多壁碳纳米管(MWNTs)在GF表面达到均匀吸附,复合增强体能加快尼龙6的结晶速度,并使材料的玻璃化温度、动态模量、拉伸强度、结晶温度等明显提高,其中GF-MWNTs对复合材料性能的提高最明显,拉伸强度提升了21%,模量提高了28%.
The composite reinforcements of GF-SiO2 and GF-MWNTs were prepared by the electrostatic interaction between nanosilica (SiO2) and multi-walled carbon nanotubes (MWNTs) on the surface of glass fiber (GF) (PA6) / GF-SiO2 and nylon 6 (PA6) / GF-MWNTs composites were prepared by means of scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and thermomechanical analyzer The microstructures, thermal properties and mechanical properties of the composites were investigated.The results showed that nano-SiO 2 and MWNTs could be uniformly adsorbed on the surface of GF by electrostatic complex method, The crystallization speed, the glass transition temperature, the dynamic modulus, the tensile strength and the crystallization temperature of the nylon 6 were increased obviously. The GF-MWNTs had the most obvious improvement on the properties of the composites, the tensile strength increased by 21% Modulus increased by 28%.