pH-responsive poly(2-diethylaminoethyl methacrylate)-functionalized multiwalled carbon nanotubes  

pH-responsive poly(2-diethylaminoethyl methacrylate)-functionalized multiwalled carbon nanotube

作　　者：LI Wenwen KONG Hao GAO Chao YAN Deyue 

机构地区：[1]College of Chemistry and Chemical Engineering, Shanghai Jiaotong University, Shanghai 200240, China

出　　处：《Chinese Science Bulletin》2005年第20期2276-2280,共5页

基　　金：This work was supported by the National Natural Science Foundation of China(Grant Nos.50473010 and 20304007);Rising-Star Program Foundation of Shanghai(Grant No.03QB 14028);Fok Ying Tung Education Foundation(Grant No.910130).

摘　　要：Poly(2-diethylaminoethyl methacrylate) (PDEAEMA)-coated multiwalled carbon nanotubes (MWNT- PDEAEMA) were successfully prepared by MWNT-surface initiated atom transfer radical polymerization (ATRP). The obtained MWNT-PDEAEMA nanocylinders have a core of MWNT and a shell of PDEAEMA and this core-shell struc- ture was confirmed by TEM observations. The UV-Vis and AFM measurements showed that the MWNT-PDEAEMA exhibited obvious pH sensitivity. The solubility of PDEAEMA-coated MWNT dramatically decreased when pH increased to ca. 7.0. Because of the giant molecular weight of the molecular hybrids and local high density of polymeric grafts linked onto MWNTs, the resulting MWNT-PDEAEMA nanocomposites are easier to aggregate, or more sensitive to pH, as compared with the neat PDEAEMA.Poly（2-diethylaminoethyl methacrylate） （PDEAEMA）-coated multiwalled carbon nanotubes （MWNT-PDEAEMA） were successfully prepared by MWNT-surface initiated atom transfer radical polymerization （ATRP）. The obtained MWNT-PDEAEMA nanocylinders have a core of MWNT and a shell of PDEAEMA and this core-shell structure was confirmed by TEM observations. The UV-Vis and AFM measurements showed that the MWNT-PDEAEMA exhibited obvious pH sensitivity. The solubility of PDEAEMA-coated MWNT dramatically decreased when pH increased to ca. 7.0. Because of the giant molecular weight of the molecular hybrids and local high density of polymeric grafts linked onto MWNTs, the resulting MWNT-PDEAEMA nanocomposites are easier to aggregate, or more sensitive to pH, as compared with the neat PDEAEMA.

关 键 词：碳纳米管 MWNT-PDEAEMA 聚乙烯 PH灵敏度 可溶性 

分 类 号：TB383[一般工业技术—材料科学与工程]