润滑
材料科学
人工肌肉
机制(生物学)
硬化(计算)
模数
复合材料
计算机科学
机械工程
纳米技术
作者
Yunlei Zhang,Weiyi Zhao,Shuanhong Ma,Hui Liu,Xiaolong Wang,Xiaoduo Zhao,Bo Yu,Meirong Cai,Feng Zhou
标识
DOI:10.1038/s41467-022-28038-9
摘要
Abstract In nature, living organisms evolve unique functional components with mechanically adaptive compatibility to cater dynamic change of interface friction/lubrication. This mechanism can be used for developing intelligent artificial lubrication-regulation systems. Inspired by the muscle hardening-triggered lubrication of longsnout catfish , here we report a modulus adaptive lubricating hydrogel prototype consisting of top mucus-like hydrophilic lubricating layer and muscle-like bottom hydrogel that can stiffen via thermal-triggered phase separation. It exhibits instant switch from soft/high frictional state (~0.3 MPa, μ ~0.37) to stiff/lubricating state (~120 MPa, μ ~0.027) in water upon heating up. Such switchable lubrication is effective for wide range of normal loads and attributed to the modulus-dominated adaptive contact mechanism. As a proof-of-concept, switchable lubricating hydrogel bullets and patches are engineered for realizing controllable interface movements. These important results demonstrate potential applications in the fields of intelligent motion devices and soft robots.
科研通智能强力驱动
Strongly Powered by AbleSci AI