氨基功能化石墨烯/水性聚氨酯复合材料的制备与性能研究  

Preparation and properties of amino-functionalized graphene/polyurethane composites

作　　者：李晓萱[1] 王忠娟[1] 伍胜利[1,2] 

机构地区：[1]合肥工业大学化学与化工学院,安徽合肥230009 [2]安徽省食品药品检验研究院,安徽合肥230051

出　　处：《合肥工业大学学报（自然科学版）》2016年第1期128-133,共6页Journal of Hefei University of Technology：Natural Science

基　　金：安徽省高等学校自然科学研究资助项目(KJ2012B141)

摘　　要：文章以2,4-甲苯二异氰酸酯(2,4-TDI)为架桥剂,制备了表面含伯胺基的功能化石墨烯(N-FGNs)。然后将其与末端含异氰酸酯的聚氨酯树脂混合,通过伯氨基与异氰酸酯之间的反应制备了两者之间存在共价键的石墨烯/水性聚氨酯(N-FGNs/WPU)复合材料。透射电镜(TEM)和扫描电镜(SEM)表征结果表明,N-FGNs可均匀分散在聚氨酯中,同时两者之间存在很强的界面作用力。当N-FGNs的添加量为1.0%时,该N-FGNs/WPU复合材料的拉伸强度相对于纯的WPU材料提升了77%,40℃时的储能模量E′提高了930%,断裂伸长率仅下降了4%。The functionalized graphene N-FGNs containing primary amino groups in the surface was prepared with toluene diisocyanate（2,4-TDI） as bridge-agent. Then it was mixed with polyurethane resin containing isocyanate groups（-NCO） in the end, and polyurethane/graphene composite of the covalent bond between the two was prepared by the reaction of primary amino groups and isocyanate groups. Transmission electron microscopy（TEM） and scanning electron microscope（SEM） pictures showed that N-FGNs dispersed in polyurethane uniformly, while there was a very strong interfacial force between the two materials. When the content of N-FGNs was 1.0%, the tensile strength of the N-FGNs/WPU composite was improved by 77% in comparison with pure PU material, storage modulus E′ increased 930%, and elongation rate at fracture dropped only 4%.

关 键 词：石墨烯 水性聚氨酯 力学性能 热稳定性 

分 类 号：TQ334.1[化学工程—橡胶工业]