Understand the Temperature Sensing Behavior of Solid-state Polymerized PEDOT Hybrid Based on X-ray Scattering Studies
Understand the Temperature Sensing Behavior of Solid-state Polymerized PEDOT Hybrid Based on X-ray Scattering Studies
复制标题
DOI：
10.1007/s10118-023-3005-4
复制
发表时间：
2023-07
影响因子：
4.3
通讯作者：
Zhen He;Guangun Liu;Zefei Zhou;Zhen Liu;Yingqi Zeng;P. Zhang
中科院分区：
文献类型：
--
作者：
Zhen He;Guangun Liu;Zefei Zhou;Zhen Liu;Yingqi Zeng;P. Zhang
聚（3，4-乙撑二氧噻吩）（PEDOT）是近年来用于人体健康监测的可穿戴传感器中最成功的导电聚合物之一。本工作中，我们制备了一系列由PEDOT、聚苯乙烯磺酸钠（PSSNa）和聚氧化乙烯（PEO）组成的PEDOT杂化物，并且它们的制备可以通过适合的固相聚合工艺放大。如此制备的PEDOT：PSS/PEO杂化物的电阻显示出明显的温度响应，即，它几乎随温度的升高而线性地降低。为了理解这一现象，我们采用同步辐射广角和小角X射线散射（WAXS/SAXS）技术研究了PEDOT：PSS/PEO杂化材料随温度变化的微观结构.这表明PEDOT在杂化物中形成了导电路径，并且没有被PEO结晶破坏。随着温度的升高，PEO晶体的熔化和伴随的PEDOT链的重组赋予了杂化样品的温度响应性。在此基础上，利用该杂化材料制备了具有1 °C温度敏感性能的柔性可穿戴传感器。这些发现揭示了用于体温监测的可穿戴传感器的可扩展制造。
Poly(3,4-ethylenedioxythiophene) (PEDOT) is one of the most successful conductive polymers that recently has been used in wearable sensors for human health monitoring. In this work, we prepared a series of PEDOT hybrids consisting of PEDOT, sodium poly(styrene sulfonate) (PSSNa) and polyethylene oxide (PEO), and their preparation could be scaled-upviaan adapted solid-state polymerization process. The resistance of the as-prepared PEDOT:PSS/PEO hybrid shows clear temperature response,i.e., it decreases almost linearly with the temperature increase. To understand this phenomenon, thein situsynchrotron radiation wide- and small-angle X-ray scattering (WAXS/SAXS) characterizations were undertaken to study the temperature-dependent microstructure change of the PEDOT:PSS/PEO hybrid. It demonstrated that PEDOT formed conductive paths in the hybrids, which were not destroyed by the PEO crystallization. As temperature increased, the PEO crystals’ melting and the accompanying reorganization of PEDOT chains endowed the hybrid sample temperature responsiveness. Based on these fundamental knowledges, the hybrid materials were used to fabricate flexible wearable sensor that showing temperature sensing performance with an accuracy of 1 °C. These findings shed lights on the scalable manufacturing of wearable sensors for body temperature monitoring.