Chinese Journal of Applied Chemistry ›› 2021, Vol. 38 ›› Issue (10): 1238-1254.DOI: 10.19894/j.issn.1000-0518.210372

• Review • Previous Articles     Next Articles

Progress in Self⁃assembly and Photo⁃responsiveness of Thin Films of Azobenzene⁃Based Liquid Crystalline Block Copolymers

Long-Fei LUO1‡, Yu-Jie LI2‡, Zhi-Hao SHEN1(), Shi-Jun ZHENG2, Xing-He FAN1   

  1. 1Beijing National Laboratory for Molecular Sciences,Key Laboratory of Polymer Chemistry and Physics of Ministry of Education,Center for Soft Matter Science and Engineering,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China
    2College of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450000,China
  • Received:2021-07-29 Accepted:2021-08-31 Published:2021-10-01 Online:2021-10-15
  • Contact: Zhi-Hao SHEN
  • About
  • Supported by:
    National Key R&D Program of China(2018YFB0703702);the National Natural Science Foundation of China(51725301)


As a type of block copolymers (BCPs) containing an azobenzene-containing liquid crystalline (LC) block, azobenzene-based LC BCPs (LCBCPs), have attracted the attention of researchers in the fields of nanotechnology, information storage, and photonics, owing to the combination of the microphase separation of BCPs, the ordered LC structures of LC polymers, and the photo-responsiveness of azobenzene mesogens. In this review, the recent research progresses in self-assembly and photo-responsiveness of thin films of azobenzene-based LCBCPs are summarized. The principles of the excluded volume effect and the surface segregation are introduced. In addition, the influences of the excluded volume effect and the surface segregation on the self-assembled structures and the photo-induced orientation of azobenzene-based LCBCP films are also discussed. The light regulation with different light sources, including linearly polarized light, ultraviolet (UV) light and unpolarized light, on the self-assembled structures of azobenzene-based LCBCPs are described. In addition, the functional applications of azobenzene-based LCBCP films are also briefly introduced. Then, the challenges of current research on the self-assembly of thin films of azobenzene-based LCBCPs are discussed. Finally, the future research prospects of azobenzene-based LCBCPs are proposed.

Key words: Azobenzene liquid crystalline polymer, Photo-responsiveness, Block copolymer, Thin-film self-assembly, Excluded volume effect, Surface segregation, Functional application

CLC Number: