Page 56 - 《精细化工》2020年第5期
P. 56
第 37 卷第 5 期 精 细 化 工 Vol.37, No.5
202 0 年 5 月 FINE CHEMICALS May 2020
功能材料
PEDOT:PSS 导电自支撑薄膜的合成与表征
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马小涵 ,胡云平 ,言驿鹏 ,宾月珍
(1. 大连理工大学 化工学院 高分子材料系,辽宁 大连 116024;2. 湘潭中微新材料有限公司,湖南 湘
潭 411100)
摘要:以 3,4-乙烯二氧噻吩(EDOT)为原料,聚对苯乙烯磺酸钠(PSS-Na)为分散剂和掺杂剂,通过化学氧化
合成法在水体系中聚合制备了聚(3,4-乙烯二氧噻吩):聚苯乙烯磺酸(PEDOT:PSS)悬浮液,通过真空抽滤法制备
了 PEDOT:PSS 自支撑柔性导电薄膜。通过 FTIR、UV-Vis 对聚合产物结构进行了表征与确证,通过四探针电导
率测试、SEM、拉伸断裂强度测试对 PEDOT:PSS 薄膜的导电性、微观形貌与力学性能进行了表征。结果表明,
成功制备了 PEDOT:PSS 目标产物,在氧化剂过硫酸铵与单体 EDOT 物质的量比为 0.875 时达到最佳电导率
(19.19 S/cm)。自支撑薄膜厚度约 18 μm,在 25 ℃,40%~60%相对湿度范围内拉伸强度达到 45~60 MPa,具
有良好的导电性与机械性能。
关键词:PEDOT:PSS;导电高分子;真空抽滤;自支撑薄膜;功能材料
中图分类号:TM24;TB324 文献标识码:A 文章编号:1003-5214 (2020) 05-0906-06
Synthesis and characterization of poly(3,4-ethylenedioxythiophene):
poly(styrenesulfonate) free-standing conductive film
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MA Xiaohan , HU Yunping , YAN Yipeng , BIN Yuezhen
(1. Department of Polymer Science & Materials, School of Chemical Engineering, Dalian University of Technology,
Dalian 116024, Liaoning, China; 2. Xiangtan Zhongwei Nanotech Co., Ltd., Xiangtan 411100, Hunan, China)
Abstract: Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) suspension was prepared
by chemical oxidation synthesis in water system using 3,4-ethylenedioxythiophene (EDOT) as monomer,
poly(sodium-p-styrenesulfonate) (PSS-Na) as dispersant and doping agent. PEDOT:PSS free-standing
flexible conductive film was prepared by vacuum filtration. The structure of the polymerized product was
characterized by FTIR and UV-Vis. The conductivity, morphology and mechanical properties of
PEDOT:PSS film were characterized by four-probe conductivity test, SEM and tensile strength test,
respectively. The results showed that PEDOT:PSS was successfully prepared. The prepared film
achieved an optimal conductivity of 19.19 S/cm when the mole ratio of oxidant (NH 4) 2S 2O 8 to EDOT
monomer was 0.875. The thickness of the free-standing film was about 18 μm. The tensile strength of the
free-standing film reached 45~60 MPa at 25 ℃ and in the range from 40% to 60% relative humidity.
This indicated that the prepared PEDOT:PSS free-standing film possessed both good conductivity and
mechanical properties.
Key words: PEDOT:PSS; conductive polymer; vacuum filtration; free-standing film;functional materials
随着个人信息平台与物联网的发展,柔性、可 接安装在人类皮肤上等,输出物理或化学信号,从
穿戴电子器件需求的增长已经渗透到现代电子工 而实现疾病诊断、健康监测或身体运动监测等方面
业、材料工业和诸多相关多学科领域中,其要求传 的功能 [1-3] 。柔性可穿戴电子器件的发展对于推动中
感器能够附着于织物表面,或使用胶黏带、皮带直 国生命健康、医疗卫生、人工智能等方面的进一步
收稿日期:2019-11-18; 定用日期:2020-01-14; DOI: 10.13550/j.jxhg.20191088
基金项目:国家自然科学基金(21374014)
作者简介:马小涵(1994—),女,硕士生,E-mail:570950821@qq.com。联系人:宾月珍(1966—),女,教授,E-mail:binyz@dlut.edu.cn。