碳纳米管改性方法对聚酰胺11性能影响研究  

Effect of carbon nanotube modification method on properties of polyamide 11

作　　者：李波 龚军[1] 金学义[1] 孟晓宇[2] LI Bo;GONG Jun;JIN Xueyi;MENG Xiaoyu(China Oilfield Services Co,Ltd,Sanhe 065201,China;China University of Petroleum(Beijing),Beijing 102249,China)

机构地区：[1]中海油田服务股份有限公司,河北三河065201 [2]中国石油大学(北京),北京102249

出　　处：《中国塑料》2022年第2期61-66,共6页China Plastics

摘　　要：采用酸处理和聚乙烯亚胺(PEI)表面修饰两种方法对多壁碳纳米管(MWCNTs)进行改性,将改性碳纳米管与聚酰胺11(PA11)熔融共混,制备了聚酰胺11/酸刻蚀碳纳米管(PA11/a-MWCNTs)和聚酰胺11/聚乙烯亚胺接枝碳纳米管(PA11/PEI-MWCNTs)复合材料,并通过扫描电子显微镜(SEM)、热重分析仪(TG)、红外光谱仪(FTIR)、差示扫描量热仪(DSC)等对复合材料的微观形貌、分散性、热稳定性、结晶性能以及力学性能进行了表征。结果表明,通过PEI表面修饰的改性方法制备的复合材料的性能更加优异;当PEI-MWCNTs含量为3%(质量分数,下同)时,PA11/PEI-MWCNTs复合材料的拉伸强度为62.7 MPa,弹性模量为1017 MPa,分别比纯PA11的提高了37%和65%,同时,其结晶度提高了14.6%。In this paper,two surface modification methods,acid treatment and polyethyleneimine(PEI)grafting,were employed to modify multi-walled carbon nanotubes(MWCNTs).The resultant acid-etched MWCNTs(a-MWCNTs)and PEI-grafted MWCNTs(PEI-MWCNTs)were melt blended with polyamide 11(PA11)to obtain the PA11/a-MWCNTs and PA11/PEI-MWCNTs composites.Their microscopic morphology,dispersibility,thermal stability,crystallinity and mechanical properties were investigated using scanning electron microscope,thermogravimetric analyzer,infrared spectrometer,and differential scanning calorimeter.The results indicated that the PA11/PEI-MWCNTs composites exhibited much better performance.When the content of PEI-MWCNTs was 3 wt%,the composites achieved tensile strength of 62.7 MPa and a Young’s modulus of 1017 MPa,which are higher than pure PA11 by 37%and 65%,respectively.In addition,their degree of crystallinity increased by 14.6%.

关 键 词：聚酰胺11 聚乙烯亚胺 多壁碳纳米管 复合材料 

分 类 号：TQ328[化学工程—合成树脂塑料工业]