Maintaining low modulus while endowing the wide-range linear stretchability to wearable or implantable devices is crucial for these devices to reduce the mechanical mismatch between the devices and human skin/tissue i...Maintaining low modulus while endowing the wide-range linear stretchability to wearable or implantable devices is crucial for these devices to reduce the mechanical mismatch between the devices and human skin/tissue interfaces.However,improving linear stretchability often results in an increased modulus of stretchable electronic materials,which hinders their conformability in long-term quantifiable monitoring of organs.Herein,we develop a hybrid structure involving interlocking low-modulus porous elastomers(Ecoflex-0030)and MXene-based hydrogels with crosslinking networks of polyvinyl alcohol,sodium alginate,and MXene.This hydrogel–elastomer structure exhibits superior performance compared with previous reports,with a wide linear stretchability strain range from 0 to 1000%and maintaining a low modulus of 6.4 kPa.Moreover,the hydrogel–elastomer hybrids can be utilized as highly sensitive strain sensors with remarkable characteristics,including high sensitivity(gauge factor~3.52),a linear correlation between the resistance and strain(0–200%),rapid response(0.18 s)and recovery times(0.21 s),and excellent electrical reproducibility(1000 loading–unloading cycles).Those electrical and mechanical properties allow the sensor to act as a suitable quantifiable equipment in organ monitoring,human activities detecting,and human–machine interactions.展开更多
基金supported by the National Natural Science Foundation of China(62001066,62104022,and 61971074)the Natural Science Foundation of Chongqing(2022NSCQ-MSX2366)+11 种基金the Fundamental Research Funds for the Central Universities(2020CDJ-LHZZ069 and 2020CDJYGGD004)the open research fund of Key Laboratory of MEMS of Ministry of Education,Southeast Universitythe Science and Technology Research Program of Chongqing Municipal Education Commission(kjzd-k202000105)the Start-up Foundation of Nanjing Vocational University of Industry Technology(YK21-03-02201012321DXS79HK2351-10:205050623HK097)the Natural Science Foundation of Jiangsu Province(BK20160702)the High-level Training Project for Professional-leader Teachers of Higher Vocational Colleges in Jiangsu Province(2023TDFX007)the Ministry of Science and Technology of China(2017YFA0204800)the National Natural Science Foundation of China(51420105003,11525415,11327901,61274114,61601116,11674052,and 11204034)the Fundamental Research Funds for the Central Universities(2242017K40066,2242017K40067,2242016K41039,2242020K40023,and 2242019R10)funded by the Administration Office of Jiangsu Talent resources。
文摘Maintaining low modulus while endowing the wide-range linear stretchability to wearable or implantable devices is crucial for these devices to reduce the mechanical mismatch between the devices and human skin/tissue interfaces.However,improving linear stretchability often results in an increased modulus of stretchable electronic materials,which hinders their conformability in long-term quantifiable monitoring of organs.Herein,we develop a hybrid structure involving interlocking low-modulus porous elastomers(Ecoflex-0030)and MXene-based hydrogels with crosslinking networks of polyvinyl alcohol,sodium alginate,and MXene.This hydrogel–elastomer structure exhibits superior performance compared with previous reports,with a wide linear stretchability strain range from 0 to 1000%and maintaining a low modulus of 6.4 kPa.Moreover,the hydrogel–elastomer hybrids can be utilized as highly sensitive strain sensors with remarkable characteristics,including high sensitivity(gauge factor~3.52),a linear correlation between the resistance and strain(0–200%),rapid response(0.18 s)and recovery times(0.21 s),and excellent electrical reproducibility(1000 loading–unloading cycles).Those electrical and mechanical properties allow the sensor to act as a suitable quantifiable equipment in organ monitoring,human activities detecting,and human–machine interactions.
