碳纳米管的表面改性及在铜基复合材料中的应用  

Surface modification of carbon nanotubes and its application in copper matrix composites

作　　者：周泉竹 徐海波[1,2] 杜敏 芦永红[1] ZHOU Quanzhu;XU Haibo;DU Min;LU Yonghong(College of Chemistry and Chemical Engineering,Ocean University of China,QingdaO266100,China;Qingdao Haida Haixi New Materials Co.,Ltd.,QingdaO266100,China)

机构地区：[1]中国海洋大学化学化工学院,山东青岛266100 [2]青岛海大海烯新材料有限公司,山东青岛266100

出　　处：《功能材料》2019年第4期4201-4206,共6页Journal of Functional Materials

摘　　要：对碳纳米管进行表面改性,能够显著提高碳纳米管的表面活性、分散稳定性及与基材的结合性,提高其在复合材料中的增强效果。以电化学制备石墨烯量子点(GQDs)作为分散剂和交联剂,对多壁碳纳米管表面(MWCNTs)进行非共价键改性得到MWCNTs/GQDs复合材料。并将改性后的MWCNTs/GQDs复合材料与商品化超细铜粉进行复合,得到具有良好导电性和抗氧化性的铜基复合材料(MWCNTs/GQDs/Cu)。结果表明,水溶液中,GQDs通过π-π键吸附在MWCNTs表面,使MWCNTs的稳定浓度高达1.0 g/L。3.0%(质量分数)的MWCNTs/GQDs复合材料与商品化超细铜粉复合后,其电导率提高5.67%IACS,抗氧化温度提高53.0℃。Surface modification of carbon nanotube can significantly improve their surface activity,dispersion stability and the compatibility between carbon nanotube and matrix material,thereby improving the reinforcing effect in the composite material.In this paper,graphene quantum dots(GQDs)prepared by electrochemical methods were used as dispersants and crosslinkers to modify the surface of multi-walled carbon nanotubes(MWCNTs)by non-covalent bonds to obtain MWCNTs/GQDs composites.The modified MWCNTs/GQDs composites were combined with commercial ultrafine copper powder to obtain copper matrix composites(MWCNTs/GQDs/Cu)with good electrical conductivity and oxidation resistance.Results show that GQDs were adsorbed on the surface of MWCNTs byπ-πbond in aqueous solution,and the stable concentration of MWCNTs was as high as1.0 g/L.When the 3.0wt%MWCNTs/GQDs composite was combined with the commercial ultrafine copper powder,the electrical conductivity increased by 5.67%IACS and the oxidation temperature increased by 53.0℃.

关 键 词：碳纳米管 石墨烯量子点 表面改性 铜基复合材料 抗氧化性 

分 类 号：TB304[一般工业技术—材料科学与工程] TB333