Gr/MCNO-NF/PVDF复合材料柔性温度传感器的构建及性能OA

In response to the demands for high sensitivity,fast response,good flexibility,and accurate temperature measurement of temperature sensors in fields such as smart wearable devices and medical health monitoring,relying on the advantages of Mn1.56Co0.96Ni0.48O4(MCNO)compounds including high negative temperature coefficient of resistance(TCR),low resistivity,and high stability,a high-performance flexible temperature sensor suitable for human wear scenarios was developed to address the deficiencies of traditional temperature sensors in flexibility adaptability,response speed,and temperature measurement accuracy.MCNO composite fibers were prepared by electrospinning method,and MCNO nanofibers(MCNO-NF)with a diameter of 0.370 μm and optimal thermosensitivity were obtained after calcination at 650 ℃.The room-temperature resistivity at 25 ℃was 9.31 × 105 Ω·cm,and the thermistor constant in the temperature range of 25 ℃ to 50 ℃ was 4 311 K.Using PET film as the flexible substrate,the mixture of graphene(Gr)/MCNO-NF/Poly vinylidene chloride(PVDF)was uniformly coated on the substrate surface by spraying process to form a sensing functional layer,which was encapsulated with a self-adhesive polydimethylsiloxane-polyethylene glycol(PDMS-PEG)matrix layer to construct the flexible temperature sensor.The sensor exhibits excellent TCR(—0.004 03 ℃-1),high sensitivity,fast response time(21 s)and recovery time(28 s),as well as good linearity(R2=0.99).