高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (2): 411.

• 研究论文 • 上一篇    下一篇

苯胺四聚体-PEG两亲性嵌段共聚物的合成、表征及自组装行为

郎乐1,2,庄秀丽1,刘亚栋1,2,章培标1,陈学思1,危岩3   

  1. 1. 中国科学院长春应用化学研究所, 生态环境高分子材料重点实验室, 长春 130022;
    2. 中国科学院研究生院, 北京 100039;
    3.爵硕大学化学系, PA 19104, 美国
  • 收稿日期:2010-03-17 修回日期:2010-04-08 出版日期:2010-02-10 发布日期:2011-02-23
  • 通讯作者: 陈学思;危岩 E-mail:xschen@ciac.jl.cn;weiyen@drexel.edu
  • 基金资助:

    国家自然科学基金(批准号: 50773081, 50733003, 50425309)和国家“八六三”计划项目(批准号: 2007AA03Z320)资助.

Synthesis, Characterization and Self-Assembly of PEG-Aniline Tetramer Block Copolymer

LANG Le1,2, ZHUANG Xiu-Li1, LIU Ya-Dong1,2, ZHANG Pei-Biao1, CHEN Xue-Si1*, WEI Yan3*   

  1. 1. Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
    2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China;
    3. Department of Chemistry, Drexel University, Philadelphia, PA 19104, USA
  • Received:2010-03-17 Revised:2010-04-08 Online:2010-02-10 Published:2011-02-23
  • Contact: CHEN Xue-Si;WEI Yan E-mail:xschen@ciac.jl.cn;weiyen@drexel.edu
  • Supported by:

    国家自然科学基金(批准号: 50773081, 50733003, 50425309)和国家“八六三”计划项目(批准号: 2007AA03Z320)资助.

摘要: 以二环己基碳二亚胺(DCC)为缩合剂与聚乙二醇单甲基醚(mPEG)反应的产物再与苯胺四聚体(AT)反应得到了两嵌段共聚物. 采用1H-NMR和FTIR分析方法确认了共聚物的结构,UV-Vis及CV的测试结果表明该共聚物具有良好的电活性特征. 用扫描电镜与光散射的方法对粒径大小进行了测量,共聚物在水溶液中可形成直径125 nm左右的均匀球形组装体,并通过透射电镜确定了组装体的实心结构. 当嵌段共聚物处于中间氧化态时,组装体的尺寸会随着溶液pH值的不同而变化. 对组装体的形成及pH敏感性的可能机理进行了讨论.  

关键词: 苯胺四聚体, 聚乙二醇, 嵌段聚合物, 电活性, 自组装

Abstract: An electroactive block copolymer consisting of methoxy poly(ethylene glycol) (mPEG) and aniline tetramer (AT), mPEG-AT, was synthesized via condensation in the presence of N,N’-dicyclohexylcarbodiimide (DCC). The chemical structure of the copolymer was confirmed by 1H-NMR and FTIR. UV-Vis and cyclic voltammogram methods were used to evaluate the electroactivity of the block copolymer. The particle size was measured by ESEM and DSL methods. The spherical aggregates with diameter of about 125 nm were observed by self-assembly method when the copolymer was dissolved in water. The diameter of spherical aggregates would alter as the variation of aqueous pH when the AT segment was oxidized to its emeraldine form. The possible mechanism of self-assembly of the block copolymer and the pH- sensitivity were discussed.

Key words: Aniline tetramer, PEG, Block copolymer, Electroactive, Self-assembly

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