Progress and application of ionic conductive elastomer adhesive
With the rapid development of flexible electronics and wearable smart devices,one of their important components,flexible mechanical sensors have become the main ideal interface for connecting biological systems with traditional electronic devices.Due to their ability to simulate the perception characteristics of human skin,they can achieve stable monitoring of various multi-dimensional physiological signals in the human body.As the core material of such sensors,stretchable flexible conductors have become the key limiting factors for the rapid development of flexible mechanical sensors.It is urgent to overcome inherent weaknesses and break through development bottlenecks to meet the growing demand.In practical applications,stretchable flexible conductors often need to be attached to the skin or various substrates,and thus stable adhesion and self-healing are key characteristics.As a new type of flexible conductors,all-solid ionic conductive elastomer adhesive has become one of the ideal candidate core materials for intelligent flexible electronic devices because it solves the problems of hydro/organogel water evaporation and solidification,possible liquid leakage in ionic gel through squeezing,as well as the difficulties in balancing the conductivity and mechanical properties.In this paper,the adhesion mechanism and self-healing mechanism of ion conductive elastomer adhesive,as well as the types and synthesis methods of main elastomer adhesive in recent years were reviewed,and their representative applications in multiple fields such as flexible electronics were introduced.At the same time,the challenges and problems in the current development and practical application of elastomer adhesive were discussed,providing feasible basis and beneficial insights for the molecular design of high-performance elastomer adhesive and their application in flexible electronic products.
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