聚氨酯
二硫键
自愈
材料科学
聚合物
形状记忆合金
自愈材料
工作(物理)
氧化还原
形状记忆聚合物
化学
复合材料
高分子化学
机械工程
工程类
生物化学
医学
替代医学
病理
冶金
标识
DOI:10.1002/macp.201600011
摘要
Polymeric materials with intrinsic self‐healing ability that can restore from mechanical injury autonomously have attracted great research efforts recently. Disulfide bonds, which become dynamic upon exposure to heat, UV light, or redox conditions, can be used to introduce healable properties to polymer network. Shape memory effect is a kind of auxiliary recovery force that can accelerate healing process. In this work, a polyurethane material combines disulfide link and shape memory effect is synthesized. Autonomous healing of a crack takes place upon heating above 80 °C and leads to almost fully recovery of mechanical properties. This healing is achieved by activating shape memory effect and disulfide exchange reaction simultaneously. image
科研通智能强力驱动
Strongly Powered by AbleSci AI