Acta Chimica Sinica ›› 2014, Vol. 72 ›› Issue (1): 83-88.DOI: 10.6023/A13101051 Previous Articles     Next Articles



张广萌, 杨继萍, 陈功   

  1. 北京航空航天大学材料科学与工程学院 空天先进材料与服役教育部重点实验室 北京 100191
  • 投稿日期:2013-10-12 发布日期:2013-12-17
  • 通讯作者: 杨继萍,;Tel.:010-82338955
  • 基金资助:

    项目受国家自然科学基金(No. 21174009)资助.

Self-assembly of Tetraaniline-PEG-Tetraaniline Block Copolymer Thin Films

Zhang Guangmeng, Yang Jiping, Chen Gong   

  1. Key Laboratory of Aerospace Advanced Materials and Performance, Ministry of Education, School of Materials Science and Engineering, Beihang University, Beijing 100191
  • Received:2013-10-12 Published:2013-12-17
  • Supported by:

    Project supported by National Natural Science Foundation of China (No. 21174009).

Amphiphilic rod-coil block copolymers containing polyethylene glycol and aniline oligomers can self-assemble into specific aggregation morphologies with different electrochemical performances, which have recently attracted more attention in many fields such as optoelectronic materials, electronics and so on. In this paper, the block copolymer of tetraaniline-polyethylene glycol-tetraaniline (ANI4-PEG-ANI4, PEG600, Mn=600) was prepared using tolylene 2,4-diisocyanate (TDI) as intermediate. At first, tetraaniline was synthesised by 4-aminodiphenyamine through oxidative coupling reaction in an acidic solution. Then, TDI was used to combine tetraaniline and PEG to prepare the triblock copolymer in the presence of N,N-dimethylformamide (DMF). 1H-NMR and FT-IR were combined to confirm the chemical structure of the resulting block copolymer. The self-assembly of the block copolymer thin films was studied in detail. ANI4-PEG-ANI4 block copolymer was dissolved in a mixing solvent with ethanol and DMF. Then the solution was coated on conductive glass ITO to prepare thin films with the same thickness. And the films were dried completely before use. Atomic force microscope (AFM), UV-Vis spectroscopy and cyclic voltammetry (CV) were used to study the self-assembly behaviors of ANI4-PEG-ANI4 block copolymer thin films. The influence of mixing ratio of ethanol/DMF and different annealing solvents on the self-assembly behaviors of ANI4-PEG-ANI4 block copolymer thin films were investigated. The annealing solvents included ethanol, methanol, chloroform and tetrahydrofuran. The results showed that by changing the mixing ratio of ethanol/DMF, the morphologies of the block copolymer thin films could be changed from spheric to rod-like morphologies. And by changing the annealing solvents, the copolymer thin films could self-assemble into such as spheric, rod-like and fibrillar morphologies. The different aggregation structures of the block copolymer thin films exhibited different electrochemical performances. So the aggregation structures of ANI4-PEG-ANI4 block copolymer thin films could be tuned nicely by changing the solvents and annealing solvents.

Key words: tetraaniline, polyethylene glycol, block copolymer, self-assembly, solvent annealing