CVD法制备无硫膨胀石墨/碳纳米管复合材料及其导热性能研究  

The Preparation of Sulfur-free Expanded Graphite/Carbon Nanotube Composites by CVD Method and the Study of Their Thermal Conductivity

作　　者：王振廷 王传波 尹吉勇 刘昊洋 WANG Zhenting;WANG Chuanbo;YIN Jiyong;LIU Haoyang(School of Materials Science and Engineering,Heilongjiang University of Science and Technology,Harbin 150022,China)

机构地区：[1]黑龙江科技大学材料科学与工程学院,黑龙江哈尔滨150022

出　　处：《山东化工》2025年第3期8-11,共4页Shandong Chemical Industry

基　　金：石墨烯节能电暖器(项目编号:LJGXCG2022-114)。

摘　　要：通过电化学法制备膨胀石墨,采用CVD法以硝酸铁为催化剂,乙炔为碳源在膨胀石墨层间原位生长碳纳米管,经过碳化石墨化提纯,二辊压延机辊压增密处理后制备出一种复合导热膜。并通过XRD、SEM、EDS对复合材料的组织结构进行表征分析,使用激光导热仪对复合膜进行导热性能测试。研究结果表明,使用硝酸铁作为催化剂,乙炔为碳源成功在膨胀石墨间隙中生长出碳纳米管,管径为20 nm左右。随着通入碳源的减少,碳纳米管的产量也随之减少。制备的复合导热膜的导热性能相对于膨胀石墨膜大幅提高,导热系数提高到804.21 W/(m·K)。Expanded graphite was prepared by electrochemical method,and carbon nanotubes were grown in situ between the layers of expanded graphite using CVD method with iron nitrate as catalyst and acetylene as carbon source.After carbon graphitization purification,a composite thermal conductive film was prepared by roller compaction and densification treatment in a two roll rolling mill.And the microstructure of the composite material was characterized and analyzed by XRD,SEM,EDS,and the thermal conductivity of the composite film was tested using a laser thermal conductivity meter.The research results indicate that using iron nitrate as a catalyst and acetylene as a carbon source,carbon nanotubes with a diameter of about 20 nm were successfully grown in the gaps of expanded graphite.As the amount of carbon source introduced decreases,the yield of carbon nanotubes also decreases.The thermal conductivity of the prepared composite thermal conductive film is significantly improved compared to the expanded graphite film,with a thermal conductivity coefficient of 804.21 W/(m·K).

关 键 词：CVD法 膨胀石墨 碳纳米管 制备工艺 

分 类 号：TQ127.1[化学工程—无机化工] TB383[一般工业技术—材料科学与工程]