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采用氧化石墨烯还原法制备了石墨烯(GR),同时采用混酸酸化法处理多壁碳纳米管(MWCNTs),以1%(wt,质量分数,下同)的GR和不同含量的酸化MWCNTs作为填料,通过超声搅拌分散-原位聚合法制得抗静电碳系/聚酰亚胺(GR-MWCNTs/PI)复合薄膜,并对复合薄膜的抗静电性能、热稳定性和力学性能进行表征。结果表明,2种碳系材料的添加可明显提高薄膜的导电性、机械性能和抗静电的效果,导电填料的添加对薄膜的热稳定性影响不大,在GR含量为1%,MWCNTs含量为2%时,在560℃时失重率约35%,电阻率为4.44×107Ω·cm,拉伸强度达到88.0MPa,断裂伸长率达到16.23%,拉伸强度和断裂伸长率分别比纯聚酰亚胺提高了122.4%和128.6%。
Graphene (GR) was prepared by the graphene oxide reduction method. Meanwhile, MWCNTs were treated by mixed acid treatment. The content of GR (1%, wt%, same below) and acidified MWCNTs The anti-static carbon / polyimide (GR-MWCNTs / PI) composite films were prepared by ultrasonic dispersion-in-situ polymerization. The anti-static properties, thermal stability and mechanical properties of the composite films were characterized. The results show that the addition of two kinds of carbon-based materials can significantly improve the conductivity, mechanical properties and antistatic effect of the film. The addition of conductive filler has little effect on the thermal stability of the film. When the content of GR is 1% and the content of MWCNTs is 2%, the weight loss rate is about 35% at 560 ℃, the resistivity is 4.44 × 107Ω · cm, the tensile strength reaches 88.0MPa, the elongation at break reaches 16.23%, the tensile strength and elongation at break are respectively higher than pure poly The imides increased by 122.4% and 128.6%.