基于碳纳米管的LB膜制备技术  

Preparation Technology of Carbon Nanotube LB Films

作　　者：郭晓燕[1] 彭倚天[1] 胡元中[1] 王慧[1] 

机构地区：[1]清华大学精密仪器与机械学系

出　　处：《纳米技术与精密工程》2008年第5期317-321,共5页Nanotechnology and Precision Engineering

基　　金：国家重点基础研究发展计划(973)项目(2003CB716201);高等学校博士学科点专项科研基金资助项目(20060003025)

摘　　要：采用混酸处理法对碳纳米管进行了羧化改性,然后进一步运用十八胺双性分子对羧化改性后的碳纳米管进行了表面修饰,深入探讨了基于双性分子表面改性后碳纳米管的LB膜制备过程,并分析了其制备工艺中超声时间、酸量和氧化处理等实验参数对羧化改性的影响,制备出了基于碳纳米管的单层及多层LB膜,初步研究了硅基底表面碳纳米管LB膜的减摩性能.实验结果表明,带有双性分子的十八胺可通过一定的实验条件连接到碳纳米管表面,通过双性分子的亲油性而有效改善碳纳米管在有机溶剂中的溶解性,为碳纳米管LB膜的制备提供了必要条件;此种碳纳米管LB膜可在低载荷下,将硅基底的耐磨性能提高50%以上.In this paper we made carbon nanotube （CNT） carboxyl modified with acid, and then functionalized CNT with octadecylamine（ODA）. Extensive study has been performed to the Langmuir-Blodgett （LB） films preparation of functionalized CNTS. The effects of hypersonic time, acid quantity, oxidation and other experimental factors on preparation were discussed in detail. Monolayer and multilayer CNT LB films were prepared to study the antifriction of CNT LB film on silicon. The results show that, under certain experimental conditions, CNTS could be functionalized by ODA, which has both hydrophilic and hydrophobic groups. The solubility of functionalized CNTS in organic solvents is remarkably improved because of the existence of hydrophobic groups, which makes it possible to prepare CNT LB films. This kind of CNT LB film can improve the wear-resistance of silicon by over 50% under lower load.

关 键 词：碳纳米管 羧化改性 表面修饰 LB膜 

分 类 号：TB383.1[一般工业技术—材料科学与工程]