活性可控聚合制备水溶性单壁碳纳米管

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.