炭纤维表面原位生长CNT/CNF及其生长机理  

In-situ growth of CNT/CNF on carbon fiber surface and growth mechanism

作　　者：徐先锋[1,2] 洪龙龙[1] 肖鹏[2] 李辉[1] 卢彩涛 

机构地区：[1]华东交通大学机电工程学院载运工具与装备重点实验室,南昌330013 [2]中南大学粉末冶金国家重点实验室,长沙410083 [3]北京康普锡威科技有限公司,北京101400

出　　处：《粉末冶金材料科学与工程》2013年第5期768-774,共7页Materials Science and Engineering of Powder Metallurgy

基　　金：国家自然科学基金资助项目(51165006);国家重点基础研究发展计划(973计划)基金资助项目(2011CB605804)

摘　　要：以电镀Ni颗粒为催化剂、丙烯(C3H6)为碳源、H2为载气、N2为稀释气体,采用催化化学气相沉积(CCVD)法,在炭纤维表面原位生长碳纳米管/碳纳米纤维(CNT/CNF),并对炭纤维进行表面改性。利用SEM和TEM对生长的CNT/CNF进行表征。利用Raman光谱表征未经处理的炭纤维和由CCVD生长的CNT/CNF炭纤维,对比改性前后的纤维表面结构。结果表明:表面改性可减少纤维表层的无序碳和非晶碳的数量,提高表层的石墨化程度。基于实验分析,提出了1种CCVD生长CNT/CNF的"断裂—吸附—扩散—沉积"机理模型。Using nickel particles as catalysts, C3H6, H2, N2 as carbon source, carrier gas and diluent gas, respectively, the carbon nano-tube/carbon nano-fiber （CNT/CNF） were self-grown on the surface of carbon fibers （CFs） by the method of catalytic chemical vapor deposition （CCVD） to make surface modification of CF. The structures of CNT/CNF were observed by SEM and TEM. Surface structure of untreated and treated carbon fiber （CF） were observed by Raman spectra. The results show that the surface modification can decrease the amount of disordered carbon and amorphous carbon, improve the surface graphitization of carbon fiber. A new ＂Fracture-Adsorption-Diffusion-Deposition＂ mechanism model for CCVD growth of CNT/CNF is suggested based on these analyses.

关 键 词：催化化学气相沉积 碳纳米管 碳纳米纤维 表面改性 生长机理 

分 类 号：TB332[一般工业技术—材料科学与工程]