In hot environments,the human body shows an efficient capability to maintain a stable temperature by benefiting from sweating behavior.Inspired by this skin perspiration strategy,in this study,we demonstrated an innov...In hot environments,the human body shows an efficient capability to maintain a stable temperature by benefiting from sweating behavior.Inspired by this skin perspiration strategy,in this study,we demonstrated an innovative polyimide foam(PIF)-based mimetic skin with excellent cooling capability by integrating a silver coating and reusable hydrogel for the first time.Because of the hybrid thermal dissipating system,the successive silver coating quickly transferred heat to the inside of the polyacrylamide hydrogel.Meanwhile,the hydrogel absorbed a large amount of heat due to its large enthalpy and effectively dissipated heat to the environment through the evaporation of moisture,similar to the sweating of skin.Thus,the temperature of the skin-like film was reduced by 25.4℃compared with pure PIF under a high-power laser heating source.Identical and remarkable cooling effects were also obtained in mobile phone and battery applications,far better than commercially available thermally conductive polyimide(PI).This outstanding performance paves a new way for the thermal management application of PI in wearable electronics,microprocessors,and flexible electronics.展开更多
基金the National Natural Science Foundation of China(Grant No.U21A2094)CASHIPS Director's Fund(Grant Nos.YZJJZX202015,YZJJ202304-CX,and YZJJ2023QN36)the Anhui Province Postdoctoral Researcher Research Project(Grant No.E24F0D27)。
文摘In hot environments,the human body shows an efficient capability to maintain a stable temperature by benefiting from sweating behavior.Inspired by this skin perspiration strategy,in this study,we demonstrated an innovative polyimide foam(PIF)-based mimetic skin with excellent cooling capability by integrating a silver coating and reusable hydrogel for the first time.Because of the hybrid thermal dissipating system,the successive silver coating quickly transferred heat to the inside of the polyacrylamide hydrogel.Meanwhile,the hydrogel absorbed a large amount of heat due to its large enthalpy and effectively dissipated heat to the environment through the evaporation of moisture,similar to the sweating of skin.Thus,the temperature of the skin-like film was reduced by 25.4℃compared with pure PIF under a high-power laser heating source.Identical and remarkable cooling effects were also obtained in mobile phone and battery applications,far better than commercially available thermally conductive polyimide(PI).This outstanding performance paves a new way for the thermal management application of PI in wearable electronics,microprocessors,and flexible electronics.
