摘要
采用“一锅”法的策略制备了一种具有可拉伸性、导电、抗冻性、自愈合性能的聚乙烯醇(PVA)/聚丙烯酸(PAA)/尿素(Urea)/Fe^(3+)水凝胶。结果表明,PVA/PAA/Urea/Fe^(3+)水凝胶具有良好的自愈合性能,愈合效果达90%以上,同时具有良好的力学性能,其拉伸强度为0.27 MPa,断裂伸长率为719%,韧性为0.72 MJ/m^(3)。能够在-20℃的低温环境中工作。在100%应变时,灵敏因子可达2.1,且该水凝胶可以在-20℃环境中通过无线蓝牙设备远程监测人体关节的运动状态,在100次拉伸循环测试中相对电阻值的电信号没有出现衰减的情况。这一策略为制备高强度、抗冻、导电的水凝胶提供了一种可行的方法,扩展了水凝胶应变传感器在复杂环境中的应用前景。
A polyvinyl alcohol(PVA)/polyacrylic acid(PAA)/urea/Fe^(3+)hydrogel with tensibility,conductivity,frost resistance and self-healing properties was prepared by the strategy of"one-pot"method.The research results show that PVA/PAA/urea/Fe^(3+)hydrogel has good self-healing properties,the healing effect is more than 90%,and it also has good mechanical properties.The tensile strength is 0.27 MPa,the elongation at break is 719%,and the toughness is 0.72 MJ/m^(3).It can work in a low temperature environment of-20℃,while at 100%strain,the sensitivity factor can reach 2.1,and the hydrogel can remotely monitor the motion state of human joints through wireless Bluetooth devices at-20℃,and there is no attenuation of the electrical signal of the relative resistance value during the 100 stretch cycle test.This strategy provides a feasible method for preparing hydrogels with high strength,frost resistance and conductivity,and expands the application prospect of hydrogel strain sensor in complex environments.
作者
刘洋
叶文浩
武元鹏
李振宇
王犁
来婧娟
颜贵龙
Yang Liu;Wenhao Ye;YuanpengWu;Zhenyu Li;LiWang;Jingjuan Lai;Guilong Yan(School of New Energy and Materials,Southwest Petroleum University,Chengdu 610500,China)
出处
《高分子材料科学与工程》
北大核心
2025年第5期86-95,共10页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(52173301,52073238)
四川省科技厅基金(2022YFH0019)
西南石油大学创新科研团队项目(2017CXTD01)
西南石油大学研究生科研创新基金项目(2020CXZD21)。
关键词
水凝胶
应变传感器
自愈合
抗冻
尿素
hydrogel
strain sensor
self-healing
antifreeze
urea
