PEDOT/Te纳米复合纤维的制备与热电性能  

Preparation and Thermoelectric Properties of PEDOT/Te Nanocomposite Fibers

作　　者：孙嘉肖 宋海军 孙权 汤成莉[1] 张礼兵[1] Sun Jiaxiao;Song Haijun;Sun Quan;Tang Chengli;Zhang Libing(College of Information Science and Engineering,Jiaxing University,Jiaxing 314001,China)

机构地区：[1]嘉兴学院信息科学与工程学院,浙江嘉兴314001

出　　处：《微纳电子技术》2023年第1期62-69,共8页Micronanoelectronic Technology

基　　金：浙江省自然科学基金资助项目(LQ20E030015);嘉兴市公益项目(2020AY10010);嘉兴学院大学生科研训练计划项目(CD8517211433)。

摘　　要：分别采用自组装胶束软模板法和化学热还原法制备了一维结构的聚3,4-乙烯二氧噻吩(PEDOT)纳米纤维和Te纳米线,然后通过微量注射泵辅助的挤出成型法制备了不同Te质量分数的PEDOT/Te纳米复合纤维,并进一步采用热压处理提高纤维的热电性能。通过场发射扫描电子显微镜(FESEM)、透射电子显微镜(TEM)、傅里叶变换红外光谱仪(FTIR)、X射线衍射仪(XRD)等对制备的PEDOT纳米纤维、Te纳米线及PEDOT/Te复合导电纤维的微观结构及组成进行了分析,探究了热压处理对导电纤维热电性能的影响。制备的PEDOT/Te纳米复合纤维的电导率随Te质量分数的升高呈下降趋势,Seebeck系数呈上升趋势,在Te质量分数为59%时,Seebeck系数由纯PEDOT的11μV/K升高到18μV/K。热压处理后,复合纤维的电导率和Seebeck系数均得到大幅度提升,主要归因于纤维致密度的提高以及Te纳米线之间更加高效载流子传输通道的构建,最终热压后复合纤维的最大功率因子由0.95μW/mK^(2)升高到3.0μW/mK^(2)。1D poly(3,4-ethylenedioxythiophene)(PEDOT)nanofiber was synthesized by a self-assembled micellar soft-template method,and Te nanowires were prepared by a chemical thermal reduction process.Then an extrusion molding method assisted with micro-injection pump was used to prepare PEDOT/Te nanocomposite fibers with different Te mass fractions.A hot-press process was further used to enhance the thermoelectric properties of the fibers.Field emission scanning electron microscope(FESEM),transmission electron microscope(TEM),Fourier transform infrared spectrometer(FTIR)and X-ray diffractometer(XRD)were used to analyze the microstructure and composition of the PEDOT nanofibers,Te nanorods and PEDOT/Te composite conductive fibers,and to explore the effect of the hot-press process on the thermoelectric properties of the conductive fibers.The electrical conductivity of the prepared PEDOT/Te nanocomposite fiber decreases with the increase of the Te mass fraction,meanwhile the Seebeck coefficient shows a tendency of increase and improves form 11μV/K of the pure PEDOT to 18μV/K when the Te mass fraction is 59%.Due to much denser fibers and a more effective carrier transmission path between the Te nanowires,the electrical conductivity and Seebeck coefficient of the composite fibers are improved significantly.Finally,the maximal power factor of the composite fibers is enhanced from 0.95μW/mK^(2) to 3.0μW/mK^(2) after the hot-press process.

关 键 词：Te纳米线 复合材料 聚3 4-乙烯二氧噻吩(PEDOT) 热电性能 复合纤维 可穿戴电子 

分 类 号：TB33[一般工业技术—材料科学与工程] TB383