Using boronic acid functionalization to simultaneously enhance electrical conductivity and thermoelectric performance of free-standing polythiophene film
Using boronic acid functionalization to simultaneously enhance electrical conductivity and thermoelectric performance of free-standing polythiophene film
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利用硼酸功能化同时增强自支撑聚噻吩薄膜的导电性和热电性能
DOI：
10.1016/j.eurpolymj.2020.110208
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发表时间：
2020-12
影响因子：
6
通讯作者：
Weiqiang Zhou
中科院分区：
文献类型：
--
作者：
Huan Kang;Liming Xu;Yue Cai;Youfa Liu;Fengxing Jiang;Jingkun Xu;Weiqiang Zhou
聚(3-噻吩基)硼酸(PtBA)作为一种硼酸功能化的导电聚合物，由于其含硼酸基的特点，已在传感器和电致变色领域得到了广泛的应用，但已有报道的PtBA的电导率很低，仅为2×10−9S cm−1，目前还没有关于PtBA作为热电材料的研究。在本研究中，首次在含有三氟化硼乙醚(体积比为1：1)的乙腈中电合成了高质量的PtBA自支撑薄膜。采用扫描电子显微镜、傅里叶变换红外光谱、紫外-可见光谱和热重分析等手段研究了PtBA薄膜的形貌、结构和热稳定性。值得注意的是，在聚噻吩中引入了硼酸基团，使其塞贝克系数从72.5增加到125.0μV和K−1，电导率从0.014增加到0.027 S cm−1，功率因数从0.0074增加到0.0422μW和−1K−2。
Poly(3-thiophene boronic acid) (PTBA) as a boronic acid functionalized conducting polymer has been developed in sensors and electrochromics due to the characteristic feature of boronic acid groups, however, the previously reported PTBA had a very low electrical conductivity of 2.0 × 10−9S cm−1, and up to day there are no researches on PTBA used as thermoelectric materials. In this study, a free-standing PTBA film with high-quality was firstly electrosynthesized in acetonitrile containing boron trifluoride diethyl etherate (1:1 by volume). SEM, FT-IR, UV–vis and TG were conducted to investigate morphologies, structures and thermal stability of PTBA films. Notably, the introduction of boronic acid groups in polythiophene significantly increases the Seebeck coefficient from 72.5 to 125.0 μV K−1, electrical conductivity from 0.014 to 0.027 S cm−1, and power factor from 0.0074 to 0.0422 μW m−1K−2. Free-standing PTBA film will be a promising material in the field of thermoelectric.
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