PNIPAM/碳纳米管复合水凝胶辐射合成与表征  

Radiation synthesis and characterization of PNIPAM/carbon nanotubes composite hydrogels

作　　者：杨明成[1] 宋卫东[1] 张宏娜[1] 朱军[1] 李召朋[1] 朱诚身[2] 赵惠东[1] 

机构地区：[1]河南省科学院同位素研究所有限责任公司,郑州450015 [2]郑州大学材料科学与工程学院,郑州450052

出　　处：《核技术》2011年第7期517-521,共5页Nuclear Techniques

基　　金：河南省自然科学基金(0611023900)资助

摘　　要：采用辐射聚合方法合成了PNIPAM/碳纳米管(CNTs)复合水凝胶;采用FTIR、TEM等手段对CNTs的微观结构进行了分析和表征;研究了CNTs对PNIPAM/CNTs复合水凝胶溶胀性能和压缩性能的影响。结果表明,采用辐射与混酸处理相结合进行CNTs的修饰,处理后的CNTs的结构发生了明显变化,从缠绕的团簇状分散成较短且末端开口的管,在水中的分散性和稳定性明显提高。PNIPAM/MMT复合水凝胶具有温度敏感性,低临界溶解温度(LCST)均在35°C左右。使用CNTs能改善PNIPAM/CNTs复合水凝胶的压缩性能;且复合水凝胶的压缩性能随CNTs含量的增加而提高。Carbon nanotubes（CNTs） composite hydrogels were synthesized by radiation polymerization.The microstructure of CNTs was characterized by FT-IR and TEM.Effects of the CNTs on swelling and compressive properties of the hydrogels were investigated.Obvious changes were observed in structure of CNTs modified by combining gamma-ray irradiation and mixed acid treatment,becoming shorter tubes with opening ends,and their dispersibility and stability in water were markedly improved.The PNIPAM/CNTs composite hydrogels are temperature sensitive,with a lower critical solution temperature（LCST） of about 35°C.Compression performance of the PNIPAM/ CNTs composite hydrogels was improved,in an upward trend with increasing CNTs contents.

关 键 词：碳纳米管 复合水凝胶 辐射聚合 溶胀性能 压缩性能 

分 类 号：O644[理学—物理化学] O631[理学—化学]