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面向柔性可穿戴传感器的高韧性双网络离子导电水凝胶
High-toughness Dual-network Ion-conductive Hydrogel for Flexible Wearable Sensors
- 高分子通报 2024年37卷第11期 页码：1636-1644
- 作者机构：
商丘工学院机械工程学院，商丘 476000
- 作者简介：
*张姗姗，E-mail: zshan0620@163.com
- 基金信息：河南省高等教育教学改革研究与实践项目(2024SJGLX0586)
DOI：10.14028/j.cnki.1003-3726.2024.24.185
中图分类号：纸质出版日期：2024-11-20，
网络出版日期：2024-08-13，
收稿日期：2024-06-21，
录用日期：2024-07-16
- 稿件说明：
移动端阅览
张姗姗, 张强, 马兴飞. 面向柔性可穿戴传感器的高韧性双网络离子导电水凝胶. 高分子通报, 2024, 37(11), 1636–1644
Zhang, S. S.; Zhang, Q.; Ma, X. F. High-toughness dual-network ion-conductive hydrogel for flexible wearable sensors. Polym. Bull. (in Chinese), 2024, 37(11), 1636–1644
张姗姗, 张强, 马兴飞. 面向柔性可穿戴传感器的高韧性双网络离子导电水凝胶. 高分子通报, 2024, 37(11), 1636–1644 DOI： 10.14028/j.cnki.1003-3726.2024.24.185.
Zhang, S. S.; Zhang, Q.; Ma, X. F. High-toughness dual-network ion-conductive hydrogel for flexible wearable sensors. Polym. Bull. (in Chinese), 2024, 37(11), 1636–1644 DOI： 10.14028/j.cnki.1003-3726.2024.24.185.
摘要
高性能水凝胶具有优异的韧性、导电性和传感功能，被视为制备柔性可穿戴传感器理想的候选者。然而，水凝胶面临着机械性能与电化学性能之间的权衡，限制了其在柔性可穿戴传感器中的广泛应用。为了解决水凝胶机械性能与电化学性能之间难以兼容的矛盾，本文将NaCl引入聚乙烯醇/聚丙酰胺(PVA/PAM)双网络水凝胶中，采用一锅法制备了PVA/PAM/NaCl (PAN)导电水凝胶。NaCl的添加为PAN水凝胶引入了物理缠结，并提供了致密的三维网络结构。PAN水凝胶不仅具有优异的力学性能，包括1.06 MPa的拉伸强度、1550%的拉伸应变和2.79 MPa的压缩强度，同时表现出较高的电导率(2.25 S·m
–1
)。此外，PAN水凝胶应变传感器的灵敏度为1.089，且具有较高的线性相关性(
R
2
=0.988)，能够精确可靠地检测人体运动。通过将PAN水凝胶传感器装配在人体的不同位置，能够精准地识别不同肌肉运动产生的信号。
Abstract
High-performance hydrogels
known for their excellent toughness
conductivity
and sensing capabilities
are considered as ideal candidates for flexible wearable sensors. However
hydrogels often face a trade-off between mechanical performance and electrochemical properties
limiting their extensive application in flexible wearable sensors. To address the incompatibility between the mechanical and electrochemical properties of hydrogels
we introduced
NaCl into a poly(vinyl alcohol)/polyacrylamide (PVA/PAM) dual-network hydrogel. Using a one-pot synthesis method
we prepared the PVA/PAM/NaCl (PAN) conductive hydrogel. The inclusion of NaCl introduces physical entanglements into the PAN hydrogel
providing a dense three-dimensional network structure. The PAN hydrogel exhibits outstanding mechanical properties
including a tensile strength of 1.06 MPa
an elongation at break of 1550%
and a compressive strength of 2.79 MPa
while also demonstrating high electrical conductivity (2.25 S·m
–1
). Additionally
the strain sensitivity of the PAN hydrogel sensor is 1.089
with a high linear correlation (
R
2
=0.988)
enabling precise and reliable detection of human motion. By attaching PAN hydrogel sensors to various parts of the human body
it is possible to accurately identify signals generated by different muscle movements.
关键词
聚乙烯醇柔性可穿戴水凝胶离子导电
Keywords
Poly(vinyl alcohol)Flexible wearableHydrogelIonic conductivity
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