纤维素硝酸酯在MWCNTs／PMMA复合体系中的助分散作用  

Nitrocellulose-aided Dispersion of MWCNTs in MWCNTs/PMMA Nanocomposites

作　　者：宫世云[1] 张文龙[1] 谢刚[2] Bandyopadhyay Sri 赵洪[4] 

机构地区：[1]哈尔滨理工大学材料科学与工程学院,黑龙江哈尔滨150040 [2]黑龙江大学化学化工与材料学院,黑龙江哈尔滨150080 [3]School of Materials Science and Engineering,University of New South Wales,Sydney 2052,Australia [4]哈尔滨理工大学电气与电子工程学院,黑龙江哈尔滨150080

出　　处：《材料科学与工程学报》2013年第1期11-16,共6页Journal of Materials Science and Engineering

基　　金：黑龙江省自然科学基金资助项目(B200506);黑龙江省博士后流动站资助项目(LRB05-098)

摘　　要：引进一种碳纳米管的分散剂纤维素硝酸酯,研究纤维素硝酸酯在MWCNTs/PMMA复合体系中的助分散作用和可能的机理。通过观察MWCNTs在液体中的沉降情况评价纤维素硝酸酯的助分散效果;采用原位本体聚合法制备MWCNTs/PMMA复合材料并测试其耐划痕性和硬度。观察实验显示,酸处理和未酸处理的MWCNTs均能够稳定地悬浮于含有纤维素硝酸酯的MMA溶液中。测试结果表明,含有纤维素硝酸酯的酸处理MWCNTs/PMMA复合材料的耐划痕性比纯PMMA的提升了67%,布氏硬度提升了14%。纤维素硝酸酯的使用解决了MWCNTs在基体单体MMA中的沉降问题,其助MWCNTs分散作用优良。Nitrocellulose was introduced as a dispersant, and nitrocellulose-aided dispersion and possible mechanisms of MWCNTs in MWCNTs/PMMA composites were studied. MWCNTs dispersion behavior in liquids was evaluated through MWCNTs sedimentation in the liquids. MWCNTs/PMMA nanocomposites were prepared using in situ bulk polymerization, and both scratch resistance and Brinell hardness of the composites were measured. Sedimentation experiments show that both as received and acid-treated MWCNTs can suspend stably in MMA monomer liquid containing the surfactant nitrocellulose without any MWCNTs sedimentation. Measurement results demonstrate that the scratch resistance and the hardness of the acid-treated MWCNTs/ PMMA composite containing nitrocellulose are increased by 67% and 14%, respectively, compared with that of pure PMMA. Nitrocellulose is found to play an excellent role in dispersion of the MWCNTs, and application of the nitrocellulose as a dispersant may solve the problem of MWCNTs sedimentation in MMA monomer.

关 键 词：纤维素硝酸酯 聚甲基丙烯酸甲酯 碳纳米管 聚合物基纳米复合材料 分散剂 耐划痕性 

分 类 号：TQ050.4[化学工程]