石墨烯/聚氨酯复合材料的制备及其力学性能分析  

Preparation of graphene/polyurethane composite material and analysis of its mechanical properties

作　　者：雷东 刘锟 杨富康 裴坤坤 胡国新[2] 高寒阳 LEI Dong;LIU Kun;YANG Fukang;PEI Kunkun;HU Guoxin;GAO Hanyang(School of Mechanical Engineering, HangzhouDianzi University, Hangzhou 310018, China;School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China)

机构地区：[1]杭州电子科技大学机械工程学院,杭州310018 [2]上海交通大学机械与动力工程学院,上海200240

出　　处：《功能材料》2022年第1期1181-1184,1189,共5页Journal of Functional Materials

基　　金：国家自然科学基金项目(51876052,51976118);浙江省属高校基本科研业务费项目(GK199900299012-021)。

摘　　要：采用聚四氢呋喃作为软段,2,4-甲苯二异氰酸酯为硬段,MOCA为扩链剂,物理剥离的石墨烯(GNs)和硅烷偶联剂(APTES)改性的氧化石墨烯(GO)为填料合成了石墨烯/聚氨酯复合材料。通过溶胀平衡实验探究石墨烯与聚氨酯基体的相容性对力学性能的影响。结果表明,两种石墨烯的加入均能提高复合材料体系的交联密度。复合材料的拉伸强度均先增大后减小,损耗因子峰值增大。但改性GO能使阻尼温域拓宽,并且随着添加量的增加,改性GO组的体系交联密度、溶胀比、拉伸强度保持率等均优于GNs组。Using polytetrahydrofuran as the soft segment,2,4-toluene diisocyanate as the hard segment,MOCA as the chain extender,and physically exfoliated graphene(GNs)and silane coupling agent(APTES)modified graphene oxide(GO)as the filler,graphene/polyurethane composite material is prepared.The influence of the compatibility of modified graphene and polyurethane matrix on mechanical properties is explored through swelling equilibrium experiment.The results show that the addition of the two graphenes can increase the crosslinking density of the composite system.The tensile strength of the composite material increases first and then decreases,and the peak loss factor increases.However,the modified GO can broaden the damping temperature range,and with the increase in the amount of addition,the system crosslink density,swelling ratio,and tensile strength retention rate of the modified GO group are better than those of the GNs group.

关 键 词：聚氨酯 石墨烯 硅烷偶联剂 交联密度 拉伸强度 动态力学性能 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]