Understand the Temperature Sensing Behavior of Solid-state Polymerized PEDOT Hybrid Based on X-ray Scattering Studies  

作　　者：Zhen-Hang He Guang-Feng Liu Ze-Kun Zhou Zhen Liu Yi-Shu Zeng Peng Zhang 

机构地区：[1]School of Materials Science and Engineering,Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education,Sun Yat-sen University,Guangzhou 510275,China [2]Shanghai Advanced Research Institute(Zhangjiang Laboratory),Chinese Academy of Sciences,Shanghai 201204,China

出　　处：《Chinese Journal of Polymer Science》2024年第1期105-112,I0010,共9页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Nos.U2032101 and 11905306);Fundamental Research Funds for the Central Universities (No.19lgpy14);“100 Top Talents Program” of Sun Yat-sen University;the support of 19U2 beamline at Shanghai Synchrotron Radiation Facility。

摘　　要：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-up via an 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, the in situ synchrotron 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 ℃. These findings shed lights on the scalable manufacturing of wearable sensors for body temperature monitoring.

关 键 词：Solid-state polymerization PEDOT hybrid Structure-property correlation X-ray scattering 

分 类 号：TQ317[化学工程—高聚物工业] TP212[自动化与计算机技术—检测技术与自动化装置]