为了改善多壁碳纳米管的分散性,通过丙烯酸和羟基化多壁碳纳米管的酯化反应将双键引入到碳纳米管的表面,同时利用原子转移自由基聚合合成端基为卤素的苯乙烯-b-甲基丙烯酸羟乙酯嵌段共聚物,并通过对双键的加成反应,将嵌段共聚物引入到多壁碳纳米管的表面,实现了碳纳米管的化学修饰.通过FTIR、TGA和TEM技术对产物进行了表征,结果表明:嵌段共聚物通过共价键接枝到碳纳米管表面,其含量为42.9%,平均约277个碳原子接枝一条聚合物链;修饰后的MWCNTs在乙醇中分散良好.
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