化学修饰方法对聚乙二醇功能化碳纳米管的影响  

Effect of Chemical Modification on Functionalization of Carbon Nanotubes by Poly (ethylene glycol)

作　　者：孙昱飞[1] 吴飞[1] 邓小勇[1] 熊冬梅[1] 赵兵[1] 吴明红[1] 焦正[1] 

机构地区：[1]上海大学环境与化学工程学院纳米化学与生物学研究所,上海200444

出　　处：《无机化学学报》2008年第1期98-104,共7页Chinese Journal of Inorganic Chemistry

基　　金：国家973项目(2006CB705604d);上海市启明星计划(05QMX1423);上海市优秀青年教师科研基金资助

摘　　要：通过酰氯化法与碳二亚胺缩合法(EDC/NHS)制备氨基化聚乙二醇(PEG1500N)修饰的多壁碳纳米管(MWNTs)并采用FTIR、Raman、TEM、原子力显微镜(AFM)、TGA-DTA-DSC、UV-Vis进行表征与分析。实验结果发现:两种方法PEG1500N都能很好地修饰MWNTs,但EDC/NHS缩合法采用更短的反应时间(反应1d),达到了更好的接枝效果。EDC/NHS缩合法提高了碳管上羧基的利用率,接枝率大大提高。TGA-DTA分析表明缩合法接枝率为30%,而酰氯化法(反应4d)为15%。UV-Vis分析表明EDC/NHS缩合法得到的产物溶解性也更好,溶解度由1.19mg.mL-1(酰氯化法得到的产物的溶解度)提高到2mg.mL-1以上。Poly（ethylene glycol）-grafted multi-walled carbon nanotubes were prepared by acylchloride-amidation reaction and EDC/NHS（N-ethyl-N-（3-dimethylaminopropyl）carbodiimide hydrochloride/N-hydroxysuucinimide）activated amidation reaction.The obtained grafted MWNTs were characterized by FTIR,Raman,TEM,atomic force microscopy（AFM）,TGA-DTA-DSC,and UV-Vis spectroscopy.Experimental results indicate that MWNTs could be functionalized well by both the acylchloride-amidation and EDC/NHS activated amidation reactions,but the EDC/NHS activated amidation reaction is more efficient.The EDC/NHS method improves greatly the grafted rate and the efficiency in using of the carboxylic acid moieties at the defect sites of MWNTs.On the basis of thermogravimetric analysis,the grafted rate is estimated to be 30% for EDC/NHS activated amidation reaction,but only 15% for acylchloride-amidation reaction.UV-Vis studies of these polymer-grafted MWNTs indicate a water solubility of about 1.19 mg·mL^-1 for acylchloride-amidation reaction and 2 mg·mL^-1 for EDC/NHS activated amidation reaction.

关 键 词：聚乙二醇1500 多壁碳纳米管 碳二亚胺缩合法 接枝率 

分 类 号：O613.71[理学—无机化学]