4,4′-二苯基甲烷二异氰酸酯共价功能化氧化石墨烯对聚氨酯的修饰作用  

Modification of polyurethane by covalently functionalized graphene oxide with 4,4′-diphenylmethane diisocyanate

作　　者：孔德成 辛晨 赵立莹 张曾 王萍 李再峰[1] KONG De-cheng;XIN Chen;ZHAO Li-ying;ZHANG Zeng;WANG Ping;LI Zai-feng(State Key Laboratory Base of Eco-Chemical Engineering,Qingdao University of Science and Technology,Qingdao 266042,China)

机构地区：[1]青岛科技大学生态化工国家重点实验室培育基地,山东青岛266042

出　　处：《合成橡胶工业》2021年第3期230-230,共1页China Synthetic Rubber Industry

基　　金：Supported by the National Natural Science Foundation of China(21676150,21176126).

摘　　要：通过将氧化石墨烯(GO)与4,4′-二苯基甲烷二异氰酸酯(MDI)共价接枝改性可制备而得大层间距、高反应活性的新型MDI-GO粉体。结果表明,MDI-GO粉体的层间距从0.83 nm扩大至2.43 nm,其在增强聚氨酯弹性体的导热性和机械性能方面效果显著。Graphene has good prospects in the field of polymer reinforcement,because of its excellent thermal,electrical and mechanical properties.However,due to the strongπ-πstacking interaction between graphene sheets,it is difficult to uniformly disperse in the polymer matrix[1].The covalent grafting of isocyanate onto graphene oxide(GO)is an effective method to expand the graphene interlayer spacing and improve the dispersibility[2].In this paper,GO was modified by 4,4′-diphenylmethane diisocyanate(MDI)to obtain MDI-GO powder with high reactivity and interlayer distance of 2.43 nm,and then MDI-GO/polyurethane(PU)composite was prepared with toluene-2,4-diisocyanate,polytetramethylene ether glycol and MDI-GO as raw materials by in-situ reaction.

关 键 词：大间距氧化石墨烯 共价接枝 改性 聚氨酯 导热性 机械性能 

分 类 号：TQ334.1[化学工程—橡胶工业]