Chinese Journal of Applied Chemistry ›› 2020, Vol. 37 ›› Issue (7): 764-771.DOI: 10.11944/j.issn.1000-0518.2020.07.190360

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Influence of the Core Forming Block Length of Polystyrene-b-Poly(acrylic acid) Template on the Size and Properties of Polyaniline

ZHANG Yanhui, WANG Lin, MUSLIM Arzugul*, LAN Haidie   

  1. Electrochemical Engineering Center,School of Chemistry and Chemical Engineering,Xinjiang Normal University,Urumqi 830054,China
  • Received:2019-12-30 Published:2020-07-01 Online:2020-07-07
  • Contact: MUSLIM Arzugul, professor; Tel:0991-4332091; E-mail:arzu_hma@sina.com; Research interests:electroactive polymer materials
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.51763023), and the Scientific Research Plan for Universities of Xinjiang(No.XJEDU2017S028)

Abstract: Use of amphiphilic block copolymers as templates is one of the effective methods to construct conducting polymer nanostructures and adjust their morphologies and sizes. The change of the length of core-forming block has a significant effect on their micellization behavior, and then changes the morphology and size of conducting polymers limited by their micelle morphology. The change of morphology and size will inevitably lead to the change of electrochemical properties of conducting polymers. In this paper, the morphology and size of polyaniline (PANI) were controlled and its electrochemical performance was optimized by block copolymer template induction. Polystyrene-b-poly(acrylic acid) (PSx-b-PAA70, x=38, 64, 101) was successfully synthesized by reversible addition-fragmentation chain transfer radical polymerization (RAFT) and its self-assembled micelles were used as templates to prepare PANI. When the length of core forming block is shorter, the PANI shows rod-like particles with diameters 100~200 nm. When x=101, PANI presents spatial network structure and has the highest discharge specific capacitance. When the current density is 1 A/g, its discharge specific capacity can reach 386.71 F/g.

Key words: polystyrene-b-poly(acrylic acid), block copolymer template, polyaniline, capacitance