刺激响应聚合物调控表面摩擦力及黏弹力的研究

Study of Switchable Friction and Adhesion on Surfaces by Stimulus Responsive Polymers

该综述系统地报道了利用刺激响应聚合物调控表面摩擦力与黏弹力的研究.在日常生活和工业生产中,控制摩擦力和黏附力是非常重要的.通过修饰刺激响应聚合物到基底上就可以实现在表面上的可控调节.由这些刺激响应聚合物组成的体系能够根据环境的改变来调控他们的理化性质,比如温度、光、pH、电场和磁场等.因此,这种响应性行为可以用于开发新型可控设备,例如智能镊子、机器手臂、人工肌肉等.系统性地综述了在液体环境下利用刺激响应性聚合物调控表面摩擦力和黏弹力的研究现状,并着重阐述了接触面间特定的相互作用对聚合物溶胀及其摩擦学性能间关系的影响.因此,对不同环境下接触面间相互作用的细致表征对于设计有效的智能响应体系是至关重要的.最后,对该体系的应用及存在的问题进行讨论.

In this review,the studies of switchable friction and adhesion on surfaces are systematically reported by using stimulus responsive polymers.In our daily life and industry,it is great important to control friction and adhesion.The control on surfaces can be achieved by modifying stimulus responsive polymers on surfaces.The stimulus responsive systems are able to change their physiochemical properties according to the variation of surrounding environment,such as temperature,light,pH,electronic and magnetic fields.Therefore,the stimulus responsive system can be employed to explore novel controlled devices,such as smart tweezers,robotic arms and artificial muscles etc.Here,an overview of current researches on controlling friction and adhesion in liquid environments is concluded using surface-modified stimulus responsive polymers.The specific interactions between contact surfaces are particularly demonstrated to explain the effects on polymer swelling and tribology properties.It is crucially important to design effective smart systems by carefully characterization of the specific interactions changes with environment variation.At last,an overview of the application and issues encountered in the field are discussed.