Facile fabrication of CDs / PVA composite polymer to access light-responsive shape-memory effects
Stimuli-responsive shape-memory materials are a category of fascinating smart material, which have convertible shape transformation as the environment changed. Among the large number of stimuli-responsive shape-memory materials, light-driving material have sparked tremendous attention because of the stability, remote operability and green renewability. Herein, we report a novel strategy of light-responsive shape-memory polymer that made from carbon dots and polyvinyl alcohol composition. The prepared carbon dots have well visible light absorption and excellent photo-thermal conversion, which enable the carbon dots/polyvinyl alcohol composite polymer to serve as light-responsive shape-memory polymer. The carbon dots not merely work as photothermal agent but also offer an extra hydrogen bond, which accelerate the rate of shape-memory recovery. The results show that the composite polymer can realize shape recovery using relatively little laser power. Most importantly, the prepared carbon dots/polyvinyl alcohol composite polymer not only possess greatly research potential in different kinds of medical and sensing fields, but also provides a utility and economic strategy to take advantage of light.