RGO/ABS/EPDM复合材料的制备及性能研究

Preparation and property of RGO/ABS/EPDM composite

采用改进的Hummer法合成氧化石墨烯(GO),将GO进行热还原得到还原氧化石墨烯(RGO),并通过直接熔融密炼法制备石墨烯/丙烯腈-丁二烯-苯乙烯/三元乙丙橡胶(RGO/ABS/EPDM)复合材料。采用扫描电子显微镜、X射线衍射仪、傅里叶变换红外光谱仪、四探针法等分析手段对复合材料表面形貌、微观结构、导电性能和力学性能进行了表征。结果表明:RGO优先分散于丙烯腈-丁二烯-苯乙烯聚合物(ABS)中,且热还原得到的RGO有效地提高了复合材料的力学性能和导电性能;RGO添加量为2. 5%(wt,质量分数,下同)时,复合材料拉伸强度提高74. 8%,缺口冲击强度提高4. 6%;RGO添加量为1. 5%时,复合材料缺口冲击强度最大,提高19. 8%;随着RGO添加量的增加,复合材料电阻率逐渐下降,当RGO添加量达到2. 5%时,复合材料电阻率下降趋势变缓。

The modified Hummer method was used to prepare the graphene oxide(GO),and the GO was thermal reduced to obtain the RGO(reduced graphene oxide),and then the RGO/ABS/EPDM composite materials were prepared by direct melting and smelting method by combining RGO with ABS and EPDM. The surface morphology,microstructure,conductivity and mechanical properties were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD),Fourier infrared(FT-IR) and four-probe method. The results showed that the RGO was preferentially dispersed in ABS,and the mechanical properties of composite materials(RGO added was 2. 5 wt%,the tensile strength increased by 74. 8 wt%,the impact strength increased by 4. 6 wt%) and electrical conductivity(with the increasing of the quality of RGO,the resistivity was decreased,when added amount of 2. 5%,the resistivity was declined slower than before) were improved effectively by additon the RGO.