应用化学 ›› 2020, Vol. 37 ›› Issue (7): 764-771.DOI: 10.11944/j.issn.1000-0518.2020.07.190360

• 研究论文 • 上一篇    下一篇

聚苯乙烯-b-聚丙烯酸模板剂成核段长度对聚苯胺尺寸及性能的影响

张艳慧, 王琳, 阿孜古丽·木尔赛力木*, 兰海蝶   

  1. 新疆师范大学化学化工学院,电化学技术与应用工程研究中心 乌鲁木齐 830054
  • 收稿日期:2019-12-30 出版日期:2020-07-01 发布日期:2020-07-07
  • 通讯作者: 阿孜古丽·木尔赛力木,教授; Tel:0991-4332091; E-mail:arzu_hma@sina.com; 研究方向:电活性高分子材料
  • 基金资助:
    国家自然科学基金(51763023)和新疆高校科研计划(XJEDU2017S028)资助

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)

摘要: 以两亲性嵌段共聚物为模板是构筑导电聚合物纳米结构并对其形貌尺寸进行调控的有效方法之一。 嵌段共聚物成核段长度的变化对其胶束化行为有显著影响,进而也会改变受限于其胶束形貌的导电聚合物的形貌尺寸。 形貌尺寸的变化必然导致导电聚合物电化学性能变化。 本文欲通过嵌段共聚物模板诱导实现对聚苯胺(PANI)形貌尺寸的调控并使其电化学性能得到优化,采用可逆加成-断裂链转移自由基聚合(RAFT)法成功合成了嵌段共聚物聚苯乙烯-b-聚丙烯酸PSx-b-PAA70(x=38、64、101)并以其胶束为“模板”制备了窄相对分子质量分布的PANI。 在成核段(PS)长度较短时,模板诱导形成的棒状PANI颗粒,直径为100~200 nm。当 x=101时PANI呈现空间网状结构,其放电比容量高于其它样品,在电流密度为1 A/g时,其放电比容量可达386.71 F/g。

关键词: 聚苯乙烯-b-聚丙烯酸, 嵌段共聚物模板, 聚苯胺, 电容特性

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