羊毛纱线基有机/无机复合热电材料的制备及其性能

Preparation and properties of organic/inorganic composite thermoelectric materials based on wool fibers

为解决传统热电材料柔性差、制备工艺复杂的问题,以羊毛纱线作为热电材料的基底,采用溶液法配制了一种由聚(3,4-乙基二氧噻吩)∶聚(苯乙烯磺酸盐)(PEDOT∶PSS)、碳纳米管(CNT)、碲化铋(Bi_(2)Te_(3))组成的有机/无机复合热电涂层,并通过浸涂法将其涂覆在羊毛纱线表面,成功制备了高性能热电纱线。对热电纱线的形貌特征进行分析,并对热电纱线的热电性能、弯曲力学性能以及耐水洗性能进行测试。结果表明:当CNT与PEDOT∶PSS的质量比为1∶4,且Bi_(2)Te_(3)的含量为20%时,复合涂层热电纱线的热电性能最好,此时热电纱线的功率因子为9.37μW/(m·K^(2)),相应的电导率和塞贝克系数为5 775 S/m和40.3μV/K,经过数次弯曲循环及水洗测试后,电阻值仍然保持稳定。该方法为制备高性能纺织品基热电材料提供了新思路。

In order to solve the problems of poor flexibility and complex preparation process of traditional thermoelectric materials,an organic/inorganic composite thermoelectric coating composed of poly(3,4-ethyldioxythiophene)∶poly(styrene sulfonate)(PEDOT∶PSS),carbon nanotubes(CNT)and bismuth telluride(Bi_(2)Te_(3))was prepared by solution method,and coated on the surface of wool yarn by coating and dipping method,and the high-performance thermoelectric yarn was successfully prepared.The morphological characteristics of thermoelectric yarns were analyzed,and the thermoelectric properties,bending mechanical properties and washing resistance of thermoelectric yarns were tested.The results show that when the radio of CNT to Bi_(2)Te_(3) is 1∶4 and the content of Bi_(2)Te_(3) is 20%,the thermoelectric performance of the thermoelectric yarn is the best,the power factor of the thermoelectric yarn is 9.37μW/(m·K^(2)),the corresponding conductivity and Seebeck coefficient are 5775 S/m and 40.3μV/K,and the resistance value remains stable after several bending cycles and water washing tests.This method provides a new idea for the preparation of high-performace textile-based thermoelectric materials.