相关链接
联系方式
  • 通信地址:四川省成都市武侯区一环路南一段24号
  • 邮编:610065
  • 电话:02885401152
  • 传真:
  • Email:liangjiang@scu.edu.cn
当前位置:> 首页 > 论文著作 > 正文
Exploring Self-Healing and Switchable Adhesives based on Multi-Level Dynamic Stable Structure
作者:Hualiang Xu, Shiwei Zhao, Anqian Yuan, Youlong Zhao, Xudong Wu, Z Wei, Jingxin Lei*, Liang Jiang*
关键字:Switchable Adhesives, Self-healing, Metal-ligand bonds, Multi-level Dynamic Stable Structure, On-demand bonding.
论文来源:期刊
发表时间:2023年
It is a challenge to develop adhesives simultaneously capable of strong adhesion and efficient switchable ability. Herein, the authors report multifunctional switchable adhesives named Cu2+-curcumin-imidazole-polyurethane (CIPUs:Cu2+) by introducing 1-(3-aminopropyl) imidazole and curcumin into polyurethane system crossed by Cu2+ forming dynamic metal-ligand bonds. This CIPUs:Cu2+ has strong adhesion (up to 2.46 MPa) on various material surfaces due to their specially designed functional groups alike the secretions from mussels. It can achieve fast switching speed (30 s) and high switch efficiency through multiple contactless remote stimulations. Importantly, density functional theory (DFT) calculation reveals that such metal-ligand bonds consisting of two components: stronger Cu2+-curcumin complexes and weaker Cu2+-imidazole complexes can aggregate to form multi-level dynamic stable structure . The special structure can not only be acted as sacrificial sites for easily broken and reformed, allowing efficient switchable adhesion and enormous energy dissipation but also acted as firm sites to maintain the cohesion of the adhesive and the reversible reconstruction network. Intriguingly, the CIPUs:Cu2+ can achieve self-healing at room temperature without needing external stimuli. Overall, this strategy can further broaden the design of switchable adhesives in the fields of intelligent gadgets, wearable bio-monitoring devices, etc.