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从单壁碳纳米管表面的聚合 - - 制备和描述纳米复合材料

Zhaoling Yao¹, Nadi Braidy, Gianluigi A Botton

¹Departments of Chemistry, Materials Science and Engineering, and the Brockhouse Institute for Materials Research (BIMR), McMaster University, Hamilton, Ontario L8S 4M1, Canada.

Journal of the American Chemical Society

|December 18, 2003

概括

研究人员使用原子转移激素聚合方式将聚合物链连接到碳纳米管上. 虽然聚合是不受控制的,但由此产生的功能化纳米管显示出可调节的溶解性,从不溶性到水溶性形式.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
纳米技术纳米技术

背景情况:

单壁碳纳米管 (SWCNTs) 具有独特的特性,但通常需要对特定应用进行表面修改.
将聚合物植入SWCNT可以提高其可加工性,并引入新的功能.
原子转移基聚合 (ATRP) 是一种用于受控聚合物合成的多功能技术.

研究的目的:

通过ATRP使用聚合物刷来使SWCNT功能化.
为了研究从SWCNT表面的甲基甲基酸盐和三甲基酸盐的聚合.
探索由此产生的聚合物-纳米管结合物的可溶性和性质.

主要方法:

用1,3-双极循环添加的类组对SWCNT的侧墙功能化.
将ATRP启动器连接到功能化的SWCNTs.
甲基甲基酸盐和三甲基酸盐的表面启动聚合.
使用IR,拉曼光谱,DSC,TEM和AFM进行表征.

主要成果:

从SWCNT侧壁成功启动聚合,产生具有很大的聚分散性的高分子量聚合物.
用聚甲基酸功能化的SWCNT是不溶性的.
用聚三乙烯酸功能化的SWCNT在有机溶剂中表现出可溶性.
聚三乙烯酸的脱甲基化产生了水溶性聚乙烯酸功能化SWCNTs.

结论:

在SWCNT上进行表面启动的ATRP是可行的,但目前缺乏对聚合物架构的控制.
通过选择适当的单体和聚合后修饰,可以调整SWCNT-聚合物合物的溶解度.
基于SWCNT的可溶性材料的开发为复合材料,药物输送和传感器的应用开辟了道路.

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