可控构筑亚微米多孔结构复合热电柔性薄膜  

Controlled construction of flexible thermoelectric composite films with submicron porous structure

作　　者：梁丽荣 魏莎莎 邓亮 陈光明 LIANG Lirong;WEI Shasha;DENG Liang;CHEN Guangming(College of Materials Science and Engineering,Shenzhen University,Shenzhen 518071,Guangdong Province,P.R.China)

机构地区：[1]深圳大学材料学院,广东深圳518071

出　　处：《深圳大学学报（理工版）》2023年第3期308-312,共5页Journal of Shenzhen University(Science and Engineering)

基　　金：深圳市基础研究计划资助项目(JCYJ20200109105604088);国家自然科学基金资助项目(51973122)。

摘　　要：为研究柔性与热电性能优异的聚合物基薄膜,以聚醚砜(polyether sulfone,PES)柔性滤膜为基体,通过气相聚合法,构筑具有亚微米多孔结构的聚(3,4-乙烯二氧噻吩)-对甲苯磺酸盐(poly(3,4-ethylenedioxythiophene)-tosilate,PEDOT-Tos)/PES复合热电柔性薄膜,分析氧化剂的质量分数(10%~25%)和气相聚合时间对薄膜微观结构及热电性能的影响.研究结果表明,在氧化剂质量分数为20%,聚合时间为2.5 h时,可得到具有亚微米多孔结构与优异热电性能的PEDOT-Tos/PES复合薄膜,其电导率和Seebeck系数分别为(274±9)S/m和(13.8±0.5)μV/K,并且在一定的弯曲形变下表现出稳定的热电性能.该研究为制备优异柔性与热电性能的自支撑导电聚合物基薄膜提供了简便、可行的方案.To study polymer-based films with excellent flexibility and thermoelectric properties,we controllably construct poly(3,4-ethylenedioxythiophene)-tosylate/polyether sulfone(PEDOT-Tos/PES)thermoelectric composite films with submicron porous structure by vapor-phase polymerization using a PES flexible filter membrane as the substrate.The effects of oxidant mass fraction(10%~25%)and polymerization time on the microstructure and thermoelectric properties of the composite films are investigated.Accordingly,an optimized PEDOT-Tos/PES composite film with submicron porous structure and excellent thermoelectric properties is obtained with an oxidant mass fraction of 20%and a polymerization time of 2.5 h.The prepared composite film exhibits a high electrical conductivity of(274±9)S/m and a large Seebeck coefficient of(13.8±0.5)μV/K.Moreover,it also displays excellent stable thermoelectric properties upon various mechanical bending cycles.This study provides a simple and feasible strategy for the preparation of free-standing conducting polymer-based films with excellent flexibility and thermoelectric properties.

关 键 词：热电材料 聚(3 4-乙烯二氧噻吩) 气相聚合 亚微米多孔结构 热电性能 柔性薄膜 

分 类 号：TB34[一般工业技术—材料科学与工程]