表面改性碳纳米管/天然橡胶复合材料的制备及性能研究  

Preparation and Properties of Surface Modified Carbon Nanotubes/NR Composites

作　　者：刘盼 崔继文 刘影[1] 王闪 朱风帅 韩晶杰[1] LIU Pan;CUI Jiwen;LIU Ying;WANG Shan;ZHU Fengshuai;HAN Jingjie(Qingdao University of Science and Technology,Qingdao 266061,China)

机构地区：[1]青岛科技大学化工学院,山东青岛266061

出　　处：《橡胶工业》2021年第3期191-195,共5页China Rubber Industry

摘　　要：采用多巴胺对多壁碳纳米管(MWCNTs)进行非共价改性,得到多巴胺改性MWCNTs(简称PCNT)。将PCNT作为填料加入天然胶乳中制备PCNT/天然橡胶(NR)复合材料,并研究其性能。透射电子显微镜(TEM)分析结果表明MWCNTs经过多巴胺改性后在水中的分散效果明显改善。PCNT/NR复合材料的拉伸强度和撕裂强度明显提高,拉伸强度由22.7 MPa升至28.4 MPa,撕裂强度由26 kN·m^(-1)升至40 kN·m^(-1)。多巴胺用量适当的PCNT在NR基体中分散更均匀,填料与橡胶的相互作用较强,能够形成较好的填料网络结构,PCNT/NR复合材料的表面电阻显著降低。Dopamine modified MWCNTs(PCNT) were obtained by non-covalent modification of multiwalled carbon nanotubes(MWCNTs) with dopamine. PCNT was added into natural rubber latex(NRL) as a filler,PCNT/natural rubber(NR) composites were prepared,and their properties were studied. Transmission electron microscopy(TEM) analysis showed that the dispersion of dopamine modified MWCNTs in water was significantly improved. The tensile strength and tear strength of PCNT/NR composites increased significantly,the tensile strength increased from 22. 7 MPa to 28. 4 MPa,and the tear strength increased from 26 kN·m-1 to 40 kN·m-1. PCNT with proper dopamine amount was more uniformly dispersed in NR matrix,then the interaction between filler and rubber was stronger,a better filler network structure was formed,and the surface resistance of PCNT/NR composites was significantly reduced.

关 键 词：碳纳米管 多巴胺 表面改性 天然胶乳 天然橡胶 复合材料 分散性 电性能 

分 类 号：TQ332[化学工程—橡胶工业] TQ330.383