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无机材料学报

无机材料学报 ›› 2023, Vol. 38 ›› Issue (11): 1338-1344.DOI: 10.15541/jim20230197

• 研究论文 • 上一篇    下一篇

UiO-67基导电复合材料的制备及其热电性能研究

江润璐1(), 吴鑫1, 郭昊骋1, 郑琦1(), 王连军1(), 江莞1,2   

  1. 1.东华大学 1. 材料科学与工程学院, 纤维改性国家重点实验室
    2.功能材料研究中心, 上海 201620
  • 收稿日期:2023-04-18 修回日期:2023-05-23 出版日期:2023-06-16 网络出版日期:2023-06-16
  • 通讯作者: 王连军, 教授. E-mail: wanglj@dhu.edu.cn;
    郑 琦, 副教授. E-mail: qi.zheng@dhu.edu.cn
  • 作者简介:江润璐(1998-), 女, 硕士研究生. E-mail: jrl15316882687@163.com
  • 基金资助:
    中央高校基本科研业务费专项资金(2232020A-02)

UiO-67 Based Conductive Composites: Preparation and Thermoelectric Performance

JIANG Runlu1(), WU Xin1, GUO Haocheng1, ZHENG Qi1(), WANG Lianjun1(), JIANG Wan1,2   

  1. 1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
    2. Institute of Functional Materials, Donghua University, Shanghai 201620, China
  • Received:2023-04-18 Revised:2023-05-23 Published:2023-06-16 Online:2023-06-16
  • Contact: WANG Lianjun, professor. E-mail: wanglj@dhu.edu.cn;
    ZHEN Qi, associate professor. E-mail: qi.zheng@dhu.edu.cn
  • About author:About author: JIANG Runlu (1998-), female, Master candidate. E-mail: jrl15316882687@163.com
  • Supported by:
    Fundamental Research Funds for the Central University(2232020A-02)

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摘要：

热电材料能够实现热能与电能之间直接转换, 在绿色制冷、废热回收等领域具有广阔的应用前景。目前, 对热电材料的研究主要集中在无机半导体材料和导电高分子材料上, 虽然取得了很大进展, 但探索其它新型热电材料仍具有重要意义。金属-有机框架(Metal-Organic frameworks, MOFs)是一种由有机配体和金属离子或团簇通过配位键形成的晶态多孔材料, 具有独特的多孔结构以及组分结构可调等优势, 在一定程度上可以满足“电子晶体-声子玻璃”的要求。本研究采用导电客体分子促进电荷传输的策略, 将导电高分子聚3,4-乙烯二氧噻吩(PEDOT)原位聚合到锆基MOFs材料UiO-67中, 利用MOFs的有序孔道对PEDOT分子链的限域作用, 提升复合材料的电子传导能力。制备得到的PEDOT/UiO-67的电学性能研究表明, 该复合材料室温电导率最高可达5.96×10−3 S·cm−1, 比PEDOT高出1个数量级。同时, 该材料具有热电性能响应, 室温功率因子(Power Factor, PF)最高可达3.67×10−2 nW·m−1·K−2。本工作以MOF的有序孔道为反应平台, 通过简单的原位聚合合成方法构建了导电聚合物/ MOFs导电材料, 为进一步开发MOFs基热电材料提供了参考。

关键词: 金属-有机框架, 聚3,4-乙烯二氧噻吩(PEDOT), 电子传输, 热电性能

Abstract:

Thermoelectric materials are functional materials that can realize the direct conversion between heat and electricity, which have great prospects in the field of green refrigeration and waste heat recovery. To date, researches on thermoelectric materials mainly focus on semiconducting inorganic materials and conductive polymers. Although great progress has been made regarding material design and performance improvement, it is still of great significance to explore and expand thermoelectric candidates for potential application. Metal-organic frameworks (MOFs) are porous extended solids formed by coordination bonds between organic ligands and metal ions or metal clusters. They are promising candidates in the field of thermoelectrics due to their unique porous structure as well as tunable composition and structure, which could meet the requirement of "electron crystal-phonon glass". In this work, conductive polymer, poly(3, 4-vinyl dioxythiophene) (PEDOT) was in-situ polymerized in Zr-based MOFs UiO-67 through “conductive guest-promoted transport” approach. The confined effects originated from porous structures of MOFs on molecular chains of PEDOT effectively improve electrical conductivity of the composites. As a result, the prepared composites exhibit an electrical conductivity up to 5.96×10−3 S·cm−1 at room temperature, which is one order of magnitude higher than the corresponding PEDOT. Correspondingly, their power factor (PF) is up to 3.67×10−2 nW·m−1·K−2 at room temperature. In conclusion, this work uses ordered porous structures of MOFs as reaction platform and constructs conductive polymer/MOFs conductive materials by facile in-situ polymerization methods, providing a reference for further development of MOFs-based thermoelectric materials.

Key words: metal-organic framework, poly(3,4-ethyldioxythiophene), electrical conductivity, thermoelectric property

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