活性可控聚合制备水溶性单壁碳纳米管

摘要: 利用一种活性可控聚合方法——可逆加成断裂链转移（RAFT）聚合将水溶性聚合物以共价键接枝到单壁碳纳米管的表面，从而制得一种水溶性的单壁碳纳米管(SWCNT)。RAFT聚合采用丙烯酸作为单体，双硫酯(PhCS(S)CH(CH3)Ph)为链移剂。结果表明：聚丙烯酸（PAA）已通过共价键接到单壁碳纳米管表面。经RAFT聚合得到的单壁碳纳米管表面接枝聚丙烯酸（PAAgSWCNT）在水中的溶解性得到了显著改善。

Abstract: Water-soluble singlewalled carbon nanotubes (SWCNTs) were prepared by grafting water-soluble polymer to their surface by a kind of controlled/living radical polymerization. Reversible addition-fragmentation chain transfer polymerization was used for this purpose using acrylic acid as a monomer and a dithio compound, PhCS(S)CH(CH3)Ph, as a chain transfer agent that was covalently bonded to the surface of the SWCNTs. Results showed that poly (acrylic acid) (PAA) was covalently connected to the surface of the SWCNTs and the resultant product, PAA grafted SWCNTs, had a high solubility in water.