摘要
文中采用一步法制备了具有黏附性、导电性、应变传感性能和自愈性的Mg^(2+)-壳聚糖(CS)/聚丙烯酰胺(PAM)双网络复合水凝胶。将Mg^(2+)直接加入到水凝胶反应体系中,原位形成金属离子交联键,避免了复杂的浸泡过程;此外,采用紫外光引发比热引发聚合更方便快捷。Mg^(2+)-CS/PAM水凝胶与多种材料具有较强的黏附能力,如橡胶、玻璃、塑料、金属、皮肤和石头等,其中与橡胶表面的黏附强度为32.09 kPa。由于其中丰富的自由离子,Mg^(2+)-CS/PAM水凝胶表现出良好的导电性和应变敏感性,可用于监测人体的大运动和细微运动。而且切割后的水凝胶在室温4 h内可完全愈合,还能拉伸至原来长度的4倍。
A"one-step method"was used to prepare double network composite Mg^(2+)-CS/PAM hydrogels with adhesion,self-healing,conductivity and strain sensing properties.Mg^(2+)was directly added to the reaction system to form metal ion cross-linking bonds in situ,which avoided the complex immersion process.In addition,it is also more convenient and faster to use ultraviolet light initiation than thermal initiation polymerization.Mg^(2+)-CS/PAM hydrogels have strong adhesion to various materials,including rubber,glass,plastics,metal,skin and stone,where the adhesion strength to the surface of rubber is 32.09 kPa.In addition,benefiting from abundant free ions,the flexible hydrogel sensors demonstrate a stable conductivity and strain sensitivity,which could monitor both large human motions and subtle motions.Moreover,the cut hydrogels are completely healed within 4 h at room temperature and can also be stretched to 4 times of its original length.
作者
周瀚
吴小玲
游峰
吴江渝
王大威
曾小平
Han Zhou;Xiaoing Wu;Feng You;Jiangyu Wu;Dawei Wang;Xiaoping Zeng(School of Materials Science&Engineering,Wuhan Institute of Technology,Wuhan 430205,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2023年第11期18-25,共8页
Polymer Materials Science & Engineering
基金
生物无机化学与药物湖北省重点实验室开放基金(BCMM2020003)
武汉工程大学校长基金(XZJJ2021018)。
关键词
一步法
黏附性
应变敏感
自愈合
复合水凝胶
one-step method
adhesion
strain sensitivity
self-healing
composite hydrogels
