聚甲基丙烯酸甲酯/石墨烯复合材料研究

Research on polymethyl methacrylate/graphene composite materials

采用原位聚合法制备了聚甲基丙烯酸甲酯(PMMA)/石墨烯(GNS)复合材料,通过扫描电显镜、X射线衍射、红外光谱和热重分析以及力学性能和电阻率测试对产物的形貌和结构进行了表征,研究了GNS含量对复合材料性能的影响。结果表明,PMMA与GNS成功复合,引入GNS可明显改善PMMA的性能,当GNS质量分数为1.5%时,复合材料呈明显的韧性断裂特征,弹性模量、断裂应力和断裂伸长率分别达到426.2 MPa,12.7 MPa,13.9%,比PMMA提高了97.2%,130.1%,78.2%。热稳定性最优,T_(max)达到394.7℃,比PMMA提高了25.6℃。电导率达到4.89×10^(-2)S/cm,比PMMA提高了12个数量级。

The polymethyl methacrylate(PMMA)/graphene(GNS)composite material was prepared by in-situ polymerization.The morphology and structure were characterized and the effect of GNS content on the properties of composite materials was investigated by scanning electron microscope,X-ray diffraction,infrared spectroscopy,thermogravimetric analysis and testings of mechanical properties and resistivity. The results showed that PMMA and GNS were successfully combined. The performance of PMMA could be significantly improved by the introduction of GNS. When the mass fraction of GNS was 1.5%,the composite had obvious ductile fracture characteristics,and the elastic modulus,fracture stress and elongation at fracture reached 426.2 MPa,12.7 MPa,13.9%,respectively,which were higher 97.2%,130.1% and 78.2% than those of PMMA. The thermal stability was the best and T_(max) reached 394.7 ℃,which was 25.6 ℃higher than that of PMMA. The conductivity reached 4.89 ×10^(-2) S/cm,which was 12 orders of magnitude higher than that of PMMA.