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通过对多壁碳纳米管(MWCNTs)表面修饰合成羟基化的MWCNTs,利用羟基化的MWCNTs催化己内酯开环聚合,接着与溴代异丁酰溴反应,合成MWCNTs接枝聚己内酯(PCL)的大分子引发剂,利用该大分子引发剂引发N-异丙基丙烯酰胺单体进行原子转移自由基活性聚合(ATRP),成功制备了MWCNTs/PCL-b-PNIPAM复合材料。利用FTIR、TGA、XRD、NMR及TEM对产物进行表征。考察了MWCNTs/PCL-b-PNIPAM复合材料的结晶性能及在氯仿中的溶混性。XRD结果表明:MWCNTs/PCL-b-PNIPAM复合材料的结晶峰与PCLb-PNIPAM嵌段共聚物基本一致,并且MWCNTs/PCL-b-PNIPAM复合材料在氯仿溶液中有很好的混溶性。
MWCNTs were synthesized by surface modification of multiwalled carbon nanotubes (MWCNTs), the ring-opening polymerization of caprolactone was catalyzed by hydroxylated MWCNTs and then reacted with bromoisobutyryl bromide to synthesize MWCNTs grafted polycaprolactone (PCL). The MWCNTs / PCL-b-PNIPAM composites were successfully prepared by using the macromolecular initiator to initiate the NTA (ATRP) of N-isopropylacrylamide. The products were characterized by FTIR, TGA, XRD, NMR and TEM. The crystallization behavior and miscibility of MWCNTs / PCL-b-PNIPAM composites in chloroform were investigated. The XRD results showed that the crystallization peak of MWCNTs / PCL-b-PNIPAM composites is basically the same as that of PCLb-PNIPAM block copolymer, and the MWCNTs / PCL-b-PNIPAM composites have good miscibility in chloroform solution.