定向碳纳米管薄膜的制备及可控浸润性  

Controllable wettability and preparation of aligned carbon nanotubes film

作　　者：李刚[1] 李志刚[1] 徐先锋[1] 

机构地区：[1]华东交通大学机电工程学院,江西南昌330013

出　　处：《材料热处理学报》2013年第7期12-15,共4页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金项目(51165006);江西省自然基金项目(2011ZBAB215035和20122BAB206029);江西省对外科技合作项目(20121BDH80016);江西省教育厅科技项目(GJJ13343)

摘　　要：利用热化学气相沉积系统(CVD),用乙炔为碳源,氮气为载气,氢气为还原气体,氨气为刻蚀气体,在单晶硅上制备定向碳纳米管薄膜。通过扫描电镜(SEM)观察不同反应温度对碳纳米管薄膜的形貌影响,并通过接触角测量仪评估薄膜的浸润性。结果表明,生长温度对碳纳米管薄膜的定向性程度及其尺度有很大的影响,温度太低不利于定向碳纳米管的形成,太高也会阻碍定向生长,适合定向碳纳米管生长的温度在850℃左右;通过生长温度改变碳纳米管薄膜的表面微观形貌就可以大幅度地调控其表面的浸润性能,从亲水79.9°到超疏水155.4°。碳纳米管的定向程度、尺寸和浸润性等特性可以用生长温度来加以调控。The vertically well-aligned multi-walled carbon nanotubes（CNTs） film was grown on a large area of nickel-deposited single silicon substrate by thermal chemical vapor deposition（CVD） using C2H2 gas at different reaction temperatures.The effects of growth temperature on the surface morphology of CNTs were studied by SEM and wettability of CNTs was evaluated by contact meter.Growth temperature on the orientation of the CNTs film has a great impact,the suitable growth temperature is around 850 ℃,and low temperature or high temperature all hinder the directional growth of aligned CNTs.The change of surface morphology of the CNTs film through the growth temperature can substantially control the surface wetting properties,from hydrophilicity of 79.9° to superhydrophobicity of 155.4°.The results demonstrate that the orientation degree,the diameter and wettability of CNTs can be controlled with the growth temperature.

关 键 词：碳纳米管 生长温度 浸润性 接触角 可控性 

分 类 号：TB383[一般工业技术—材料科学与工程]