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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

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【Author】 GONG Shi-yun1,ZHANG Wen-long1,XIE Gang2,Bandyopadhyay Sri3,ZHAO Hong4(1.School of Materials Science and Engineering,Harbin University of Science and Technology,Harbin 150080,China; 2.School of Chemistry and Materials Science,Heilongjiang University,Harbin 150080,China; 3.School of Materials Science and Engineering,University of New South Wales,Sydney 2052,Australia; 4.School of Electrical and Electronic Engineering,Harbin University of Science and Technology,Harbin 150080,China)

【机构】哈尔滨理工大学材料科学与工程学院；黑龙江大学化学化工与材料学院； School of Materials Science and Engineering,University of New South Wales；哈尔滨理工大学电气与电子工程学院；

【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。更多还原

【Abstract】 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.更多还原

【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；
【Key words】 nitrocellulose； PMMA； CNTs； polymer-based nanocomposite； dispersant； scratch resistance；

【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)

【文献出处】材料科学与工程学报 ,Journal of Materials Science and Engineering , 编辑部邮箱 ,2013年01期

【分类号】TB383.1
【被引频次】4
【下载频次】181

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