Chin. J. Org. Chem. ›› 2012, Vol. 32 ›› Issue (05): 889-895.DOI: 10.6023/cjoc1202291 Previous Articles     Next Articles

Articles

表面引发原子转移自由基聚合制备聚电解质修饰的碳纳米管

孙庆文a, 于颖b, 张南c, 张法永c   

  1. a 上海交通大学附属胸科医院 上海 200030;
    b 复旦大学生命科学学院 上海 200433;
    c 复旦大学附属华山医院神经外科 上海 200040
  • 收稿日期:2012-02-29 修回日期:2012-03-21 发布日期:2012-04-10
  • 通讯作者: 张法永 E-mail:zhangfayong66@yahoo.com
  • 基金资助:

    上海市科委纳米专项(No. 1052nm03702)资助项目.

Preparation of Polyelectrolyte Functionalized Multiwalled Carbon Nanotubes via Surface-Initiated Atom Transfer Radical Polymerization

Qingwen Suna, Ying Yub, Nan Zhangc, Fayong Zhangc   

  1. a Shanghai Chest Hospital Affilated to Shanghai Jiaotong University, Shanghai 200030;
    b College of Life Science, Fudan University, Shanghai 200433;
    c Neurosurgical Department, Huashan Hospital, Fudan University, Shanghai 200040
  • Received:2012-02-29 Revised:2012-03-21 Published:2012-04-10
  • Supported by:

    Project supported by the Fund of Shanghai Science and Technology Commission (No. 1052nm03702).

Surface modification of multiwalled carbon nanotubes (MWNT) by polyelectrolyte can enhance the dispersibility of carbon nanotubes in various solvents. Hydroxyl groups were firstly introduced onto the surface of carbon nanotubes (CNT) via esterification of glycol with MWNT which previously treated by concentrated HNO3 and then excess thionyl chloride. Initiating sites (MWNT-Br or MWNT-Cl) for atom transfer radical polymerization (ATRP) were formed by reacting MWNT-OH with 2-bromoisobutyryl bromide or 2-chloropropionyl chloride. Grafting polymerization of poly(tert-butyl acrylate) (PtBA) or poly(4-vinylpyridine) (P4VP) from MWNT-Br or MWNT-Cl was carried out by surface-initiated ATRP polymerization. The content of grafted polymer, determined by thermal gravimetric analysis (TGA), was tuned through the feed ratio of monomer to the initiating-sites on MWNT. After hydrolysis (or quaternary amination) of the polymers, different types of polyelectrolyte-functionalized MWNT with good dispersibility in water were prepared successfully. All the materials were well characterized by TGA and infer-red spectrum (IR).

Key words: carbon nanotube, ATRP, polyelectrolyte, surface-initiation