自愈水凝胶
湿度
大气温度范围
材料科学
阿累尼乌斯方程
延伸率
扩散
压力(语言学)
极限抗拉强度
复合材料
相对湿度
活化能
高分子化学
热力学
化学
物理
语言学
哲学
有机化学
作者
Lin Zou,Xiang Liu,Hong‐Min Liu,Xiaozhen Zhang,Eric Euchler,Chuntai Liu,Baobao Chang
出处
期刊:Polymer
[Elsevier BV]
日期:2024-01-24
卷期号:295: 126735-126735
被引量:1
标识
DOI:10.1016/j.polymer.2024.126735
摘要
To get strong and anti-freezing hydrogel with multiple contact and non-contact sensing performance, a facial method is proposed in this work using multiple physical bonding crosslinking and glycerol (GL) immersing strategy. The obtained hydrogels show a tensile stress at break of 5.4 MPa, an elongation at break of 1420 %, and a compression strength of 12.2 MPa at 80 % strain. Additionally, benefiting from the GL immersing the hydrogel shows superior anti-freezing (no ice formation at −60 °C) and water retention ability (water loss less than 17 % after storing at 50 °C for 7 h). Furthermore, the volume resistance of hydrogels exhibits excellent responses against humidity, temperature, strain, and stress. The variation of the resistance against temperature can be well described by the Arrhenius equation with an activation energy of 501.3 meV, verifying a band-gap dominated diffusion hopping conductive mechanism of the hydrogel. The sufficient humidity and temperature responses make the hydrogel applicable as a non-contact sensor, and the wide temperature strain sensing (−40 to 50 °C) and stress sensing capability ensures that the hydrogel can be used as a contact sensor, ensuring that the hydrogel can be used as perfect flexible sensor for monitoring human motion and physiological signals.
科研通智能强力驱动
Strongly Powered by AbleSci AI