聚酰胺6/氧化石墨烯复合材料的制备及其性能

摘要

To study the effect of graphene oxide (GO) on the compatibility and mechanical properties of polyamide 6,graphene oxide was prepared by improved Hummers methods,then acyl-chloride-modified graphene oxide was obtained after graphene oxide was activated by thionyl chloride. Subsequently,amino-functionalized graphene oxide was prepared by the reaction of ammonia and graphene oxide and the graphene oxide grafting polyamide 6 composites were obtained by in situ polymerization method. It was characterized by the scanning electron microscope (SEM). In addition,the compatibility of the material was studied by the dispersion experiment in formic acid,and the tensile test was used to test the mechanical properties of the material. It was found that the material was successfully prepared. graphene oxide was dispersed evenly and steadily in formic acid,and its compatibility in formic acid was significantly improved. The tensile strength and Young's modulus of the composites were 133 MPa and 736 MPa respectively when the amino-functionalized graphene oxide was 0.1 wt.％.%为研究氧化石墨烯对聚酰胺6的相容性和力学性能的影响,以天然鳞片石墨为原料,采用改良的Hummers方法制备氧化石墨烯,用氯化亚砜将其活化得到酰氯修饰氧化石墨烯,再与氨气反应制备氨基化氧化石墨烯,采用原位聚合法制备出聚酰胺6/氧化石墨烯复合材料,利用扫描电子显微镜对其进行表征分析,通过在甲酸中的分散实验研究该材料的相容性,并利用拉伸实验测试其力学性能.结果表明:聚酰胺6成功以化学键形式键接到氨基化氧化石墨烯表面;氧化石墨烯在聚酰胺6基体中呈现均匀稳定分散;氧化石墨烯均匀分散于甲酸中,其在甲酸中的相容性得到了明显改善;氨基化氧化石墨烯质量分数为0.1％时,聚酰胺6/氧化石墨烯的拉伸强度和杨氏模量分别达到133和736 MPa.