One-Step Preparation of Highly Conductive Sandwich-Structured Hydrogels for Multifunctional Sensors

IF 7.2 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Chemistry of Materials Pub Date : 2025-04-30 DOI:10.1021/acs.chemmater.4c02850

Xue Jing, Shan Xia, Yujiao Bi, Guanghui Gao

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Abstract

Based on the unique structure and performance advantages, sandwich-structured hydrogels have broad application prospects in the field of electrochemical devices. However, the sandwich-structured hydrogels still face the preparation problems of a layer-by-layer construction process and complicated operation method. In this paper, a one-step preparation of sandwich-structured hydrogels with adjustable inner layer thickness was realized, wherein the inner layer of the hydrogel was enriched by PEDOT:PSS, and the outer layer of the hydrogel was polymerized by acrylamide (AM) and zwitterionic monomer (SBMA). By adjusting the content of AM and SBMA, the enrichment of PEDOT:PSS could be affected, achieving the regulation of the inner layer thickness on conductivity. The introduction of glycerol (GL) into the outer layer of the sandwich-structured hydrogel imparted excellent environmental stability to the hydrogel. Therefore, a sandwich-structured hydrogel with high conductivity (511.29 ms/cm), significant deformability (1720%), and excellent environmental stability was obtained. The sandwich-structured hydrogel could not only be used as wearable sensors to detect human movement over a large temperature range of −20 to 60 °C but could also be woven into flexible fabric sensors for position sensing and Morse code transmission, showing promising applications in the field of multifunctional sensing.

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多功能传感器用高导电性三明治结构水凝胶的一步制备

基于其独特的结构和性能优势，三明治结构水凝胶在电化学器件领域具有广阔的应用前景。然而，三明治结构水凝胶的制备仍然面临着分层构建工艺和复杂操作方法的问题。本文实现了内层厚度可调的三明治结构水凝胶的一步制备，其中内层水凝胶用PEDOT:PSS富集，外层水凝胶用丙烯酰胺（AM）和两性离子单体（SBMA）聚合。通过调节AM和SBMA的含量，可以影响PEDOT:PSS的富集，实现内层厚度对电导率的调节。将甘油（GL）引入三明治结构水凝胶的外层，使水凝胶具有优异的环境稳定性。因此，获得了具有高导电性（511.29 ms/cm）、显著的变形性（1720%）和优异的环境稳定性的三明治结构水凝胶。这种三明治结构的水凝胶不仅可以用作可穿戴传感器，在−20 ~ 60℃的大温度范围内检测人体运动，还可以编织成柔性织物传感器，用于位置传感和莫尔斯电码传输，在多功能传感领域具有广阔的应用前景。

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来源期刊

Chemistry of Materials 工程技术-材料科学：综合

CiteScore

14.10

自引率

5.80%

发文量

929

审稿时长

1.5 months

期刊介绍： The journal Chemistry of Materials focuses on publishing original research at the intersection of materials science and chemistry. The studies published in the journal involve chemistry as a prominent component and explore topics such as the design, synthesis, characterization, processing, understanding, and application of functional or potentially functional materials. The journal covers various areas of interest, including inorganic and organic solid-state chemistry, nanomaterials, biomaterials, thin films and polymers, and composite/hybrid materials. The journal particularly seeks papers that highlight the creation or development of innovative materials with novel optical, electrical, magnetic, catalytic, or mechanical properties. It is essential that manuscripts on these topics have a primary focus on the chemistry of materials and represent a significant advancement compared to prior research. Before external reviews are sought, submitted manuscripts undergo a review process by a minimum of two editors to ensure their appropriateness for the journal and the presence of sufficient evidence of a significant advance that will be of broad interest to the materials chemistry community.