纺织学报 ›› 2021, Vol. 42 ›› Issue (05): 109-114.doi: 10.13475/j.fzxb.20200900207

• 染整与化学品 • 上一篇    下一篇

等离子体接枝丙烯酸改性聚丙烯腈导电纳米纤维纱线的制备

刘晓倩, 陈玉, 周惠敏, 闫源, 夏鑫()   

  1. 新疆大学 纺织与服装学院, 新疆 乌鲁木齐 830046
  • 收稿日期:2020-09-01 修回日期:2021-01-27 出版日期:2021-05-15 发布日期:2021-05-20
  • 通讯作者: 夏鑫
  • 作者简介:刘晓倩(1995—),女,硕士生。主要研究方向为导电纺织材料。
  • 基金资助:
    国家自然科学基金项目(51763022);新疆自治区研究生教育教学改革项目(XJ2019GY10)

Preparation of polyacrylonitrile conductive nanofiber yarn grafted with acrylic acid using plasma technology

LIU Xiaoqian, CHEN Yu, ZHOU Huimin, YAN Yuan, XIA Xin()   

  1. College of Textile and Clothing, Xinjiang University, Urumqi, Xinjiang 830046, China
  • Received:2020-09-01 Revised:2021-01-27 Online:2021-05-15 Published:2021-05-20
  • Contact: XIA Xin

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摘要：

为提高聚吡咯在聚丙烯腈纳米纤维纱线表面的粘附牢度,增加纳米纤维纱线表面的亲水性,采用常温常压等离子体技术对聚丙烯腈纳米纤维纱线表面进行丙烯酸接枝改性处理,再通过原位聚合法制备聚吡咯导电纳米纤维纱线;探讨了等离子体接枝改性的最佳处理次数和接枝时间,研究了吡咯单体浓度、氧化剂用量、掺杂剂浓度和反应时间等对聚丙烯腈纳米纤维纱线导电性的影响。结果表明:当等离子体处理功率为100 W,接枝时间为4 h,接枝2次时,聚丙烯腈纳米纤维纱线的吸水率由未处理时的227.21%提升至350.31%,纱线的质量增加率可达90%;在吡咯浓度为0.6 mol/L,三氯化铁浓度为0.8 mol/L,盐酸浓度为0.6 mol/L,0 ℃条件下反应4 h时,聚丙烯腈纳米纤维纱线的电导率提高到4.589 S/cm。

关键词: 常温常压等离子体, 接枝, 原位聚合法, 纳米纤维纱线, 电导率, 丙烯酸, 聚吡咯, 聚丙烯纤维

Abstract:

In order to improve the adhesion fastness of polypyrrole on the surface of polyacrylonitrile nanofiber yarn and improve the surface hydrophilicity of nanofiber yarn, the surface of polyacrylonitrile nanofiber yarn was grafted with acrylic acid by plasma technology at ambient temperature and pressure, and the conductive nanofiber yarn of polypyrrole was prepared by in-situ polymerization. The optimal treatment time and grafting time of plasma grafting modification were discussed, and the effects of pyrrole monomer concentration, oxidant dosage, dopant concentration and reaction time on the electrical conductivity of polyacrylonitrile nanofiber yarn were analyzed. The results show that when the plasma power is 100 W, the grafting time is 4 h, the water absorption rate is increased from 227.21% to 350.31%, and the mass increase rate of polypyrrole is up to 90%. With concentrations of pyrrole being 0.6 mol/L, ferric chloride 0.8 mol/L, hydrochloric acid 0.6 mol/L, and the reaction time is 0 ℃ for 4 h, the conductivity of polyacrylonitrile nanofiber yarn is increased to 4.589 S/cm.

Key words: normal temperature and pressure plasma, graft, in-situ polymerization, nanofiber yarn, electrical conductivity, arylic acid, polypyrrole, polyacrylonitrile fiber

中图分类号: 

  • TQ342.83

图1

不同次数等离子体和接枝处理的PAN纳米纤维纱线的扫描电镜照片(×5 000)"

图2

PAN纳米纤维纱线在等离子体和接枝处理时可能发生的反应"

图3

等离子体和接枝处理次数对PAN纳米纤维纱线接枝率和吸水率的影响"

图4

不同吡咯浓度的PAN纳米纤维纱线的表面形貌照片(×500)"

图5

吡咯浓度对PAN纳米纤维纱线质量增加率和电导率的影响"

图6

三氯化铁浓度对PAN纳米纤维纱线质量增加率和电导率的影响"

图7

盐酸浓度对PAN纳米纤维纱线质量增加率和电导率的影响"

图8

反应时间对PAN纳米纤维纱线质量增加率和电导率的影响"

图9

不同PAN试样的红外光谱图"

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