Calcium copper titanate(CCTO)/polystyrenepolyethylene-polybutylene-poly styrene(SEBS)dielectric elastomers were prepared via blending method.A capacitive strain sensor using CCTO/SEBS as dielectric layer and polyanili...Calcium copper titanate(CCTO)/polystyrenepolyethylene-polybutylene-poly styrene(SEBS)dielectric elastomers were prepared via blending method.A capacitive strain sensor using CCTO/SEBS as dielectric layer and polyaniline-dodecylbenzensulfonic acid(PANI-DB S A)/SEBS as electrodes was designed and manufactured by thermoforming process.X-ray diffractometer(XRD),scanning electron microscopy(SEM)and Raman spectra analyses were carried out;no impurities were found in the composite and CCTO particles were well dispersed.The dielectric tests showed that the samples filled with 20 wt%CCTO have their permittivity improved by 70%.The capacitive strain sensors have a stabilized capacitance variety range at different strain ranges or stretch speeds,and could remain synchronized after 500-time-stretching,showing high reproducibility.展开更多
Flexible yarn sensors designed for integration into textiles have the potential to revolutionize wearable technology by continuously monitoring biomechanical strain.However,existing yarn-shaped sensors rely on capacit...Flexible yarn sensors designed for integration into textiles have the potential to revolutionize wearable technology by continuously monitoring biomechanical strain.However,existing yarn-shaped sensors rely on capacitance as a strain-dependent electrical signal and often face limitations in achieving high sensitivity,especially across a broad strain range.Here,we propose a waterproof all-in-one capacitive yarn sensor(ACYS)that is tailored to monitor a wide range of biophysical strains.Owing to the coaxial helical electrode and the ionic liquid-doped dielectric layer,the ACYS demonstrates remarkable stretchability,ultrahigh capacitance variation,and an outstanding gauge factor of 6.46 at 140%strain.With exceptional mechanical durability based on enduring 3300 stretching cycles and favorable resistance to sweat erosion,this 1D structure can be seamlessly integrated into textiles,making it ideal for use in wearable electronics.Demonstrating its application versatility,the ACYS accurately measures biomechanical strain in joint movements,facial expressions,and physiological assessments,making it a promising advancement in wearable technology.展开更多
基金financially supported by the National Natural Science Foundation of China(No.51403181)。
文摘Calcium copper titanate(CCTO)/polystyrenepolyethylene-polybutylene-poly styrene(SEBS)dielectric elastomers were prepared via blending method.A capacitive strain sensor using CCTO/SEBS as dielectric layer and polyaniline-dodecylbenzensulfonic acid(PANI-DB S A)/SEBS as electrodes was designed and manufactured by thermoforming process.X-ray diffractometer(XRD),scanning electron microscopy(SEM)and Raman spectra analyses were carried out;no impurities were found in the composite and CCTO particles were well dispersed.The dielectric tests showed that the samples filled with 20 wt%CCTO have their permittivity improved by 70%.The capacitive strain sensors have a stabilized capacitance variety range at different strain ranges or stretch speeds,and could remain synchronized after 500-time-stretching,showing high reproducibility.
基金supported by the National Key Research and Development Project(2021YFA1201600)the Natural Science Foundation of Innovative Research Groups under Grant cstc2020jcyj-cxttX0005+4 种基金the Natural Science Foundation Projects of Chongqing(cstc2022ycjh-bgzxm0206)a grant from the science and technology project of State Grid(5700-202235208 A-1-1-ZN)the Science and Technology Funds of Chongqing Municipal Education Commission(KJQN202100539,KJQN202100533)the National Natural Science Foundation of China(Grant No.62271089)Natural Science Foundation Project of Chongqing(Grant No.CSTB2022NSCQ-MSX0425).
文摘Flexible yarn sensors designed for integration into textiles have the potential to revolutionize wearable technology by continuously monitoring biomechanical strain.However,existing yarn-shaped sensors rely on capacitance as a strain-dependent electrical signal and often face limitations in achieving high sensitivity,especially across a broad strain range.Here,we propose a waterproof all-in-one capacitive yarn sensor(ACYS)that is tailored to monitor a wide range of biophysical strains.Owing to the coaxial helical electrode and the ionic liquid-doped dielectric layer,the ACYS demonstrates remarkable stretchability,ultrahigh capacitance variation,and an outstanding gauge factor of 6.46 at 140%strain.With exceptional mechanical durability based on enduring 3300 stretching cycles and favorable resistance to sweat erosion,this 1D structure can be seamlessly integrated into textiles,making it ideal for use in wearable electronics.Demonstrating its application versatility,the ACYS accurately measures biomechanical strain in joint movements,facial expressions,and physiological assessments,making it a promising advancement in wearable technology.
