非离子型聚合物改性碳纳米管及其复合材料  

CNT Modified with Nonionic Polymer for Epoxy Resin Composites

作　　者：刘款 刘礼 王幸宜[1] LIU Kuan;LIU Li;WANG Xing-yi(Laboratory for Advanced Materials,Research Institute of Industrial Catalysis,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学化学与分子工程学院,工业催化研究所先进材料研究实验室,上海200237

出　　处：《华东理工大学学报（自然科学版）》2018年第3期362-368,447,共8页Journal of East China University of Science and Technology

基　　金：国家自然科学基金(21477036)

摘　　要：以聚乙二醇二缩水甘油醚(PEE)与二胺单体4,4′-二氨基-3,3′-二叔丁基-二苯甲烷(MBTBA)为原料,在乙醇溶液中发生亲核加成/开环反应制备一种聚乙二醇类的非离子型聚合物(PM)。采用FT-IR、SEM、UV-vis手段分析表明,PM与碳纳米管(CNT)表面相互作用形成C—O—N键、C—O—C键包裹在CNT表面;在二甲基乙酰胺(DMAc)、N-N-二甲基二甲酰胺(DMF)、甲基吡咯烷酮(NMP)、四氢呋喃(THF)及水等溶剂中,CNT-PM呈现高度分散状态达数月。采用共混方法制备CNT-PM与环氧树脂EP-51复合材料,当CNT-PM的添加质量分数为0.7%时,复合材料的冲击性能由纯树脂的(21.7±1.1)kJ/m2提高到(73.5±2.1)kJ/m2,玻璃化转变温度(Tg)从163.8℃提高到180.3℃。Carbon nanotubes（CNTs）are considered to be the ideal reinforcing fillers for polymer matrixes to achieve high performance and multifunction,and have been widely used in a variety of applications such as translation,construction,aerospace and automotive industries because of their outstanding mechanical,electrical and thermal properties.However,the properties of CNT-reinforced composites are still far beyond of what is theoretically predicted.Because of high aspect ratio and intrinsic van der Waals force,CNTs tend to entangle with each other and exist in the form of bundles and ropes.As a result,homogeneous dispersion in media is still not easily obtained,especially in polymers.Furthermore,the bonds associated with the smooth surface of CNTs to the matrix are noncovalent,which results in ubiquitous interfacial slippages and a limited loading transfer from the polymer matrix to CNTs.CNTs are typically pulled out rather than fractured from the polymer matrix under failure.Poly（ethylene glycol）has received significant attention in bio-related applications because of its biocompatibility as well as non-toxicity.In this paper,we used an industrially desirable method to synthesize a nonionic poly（PM）（ether amine）via the reaction of aromatic diamine monomer containing two tert-butyl groups with poly（ethylene glycol）diglycidyl ether.The CNTs modified with PM（CNTs-PM）can be highly dispersed in organic solvents and water with high stability,and also incorporated readily into epoxy to form composites.Characterizations by Fourier transform infrared（FT-IR）,scanning electron microscopy（SEM）and ultra-violet and visible light（UV-vis）show that PM is wrapped on the surface of CNT（CNTPM）through the formation of C—O—N and C—O—C bonds.With an aid of PM,CNT can disperse homogeneously into epoxy matrix,in which a strong interfacial interaction between CNT and epoxy（EP）matrix can be observed.EP/CNT-PM composites presented the improved mechanical properties.The impact strength of composi

关 键 词：碳纳米管 化学修饰 环氧树脂 冲击强度 

分 类 号：O63[理学—高分子化学]