Research progress of waterborne polyurethane-based flexible sensing materials
In recent years,flexible sensors have a wide range of applications in wearable electronic devices,healthcare devices,electronic skin and soft robots.Polyurethane(PU)is a class of basic materials used in the field of flexible sensing,with the advantages of elastomer-like,flexibility and compatibility,which can meet the demand for better stretchability,higher sensitivity and wider working range of flexible sensors.However,with the increasing awareness of environmental protection,waterborne polyurethane(WPU)has become a research hotspot in the field of flexible sensing by virtue of its environmental friendliness,low volatility,and ease of handling.In this paper,the recent progress of WPU-based flexible sensing materials is tracked and discussed,including WPU synthesis,flexible sensing principles,and conductive filler types.Finally,the unique multifunctionality of WPU-based flexible sensors and their wide range of applications are summarized,and the future development prospects of WPU-based flexible sensing materials are outlooked.
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