Conductive nanocomposite fiber film with gas-sensing effect and preparation method thereof
A technology of nanofibers and conductive composite materials, applied in the field of conductive nanocomposite fiber membranes and its preparation, can solve the problems of complex preparation process, low gas selectivity, and poor material circulation, and achieve high gas sensitivity response intensity, high gas selectivity, The effect of low conductivity
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Embodiment 1
[0023] (1) In the experiment, the spinning solution was prepared by taking 1.2 g of TPU, 0.4 g of PES, and 8.4 g of DMF. The mass ratio of PES to TPU was 1:3, and the mass fraction of TPU was 12%. DMF was used as a solvent, TPU and PES were dispersed in DMF, and magnetically stirred at 60°C for 8 hours until a homogeneous solution was formed. After the solution is stirred evenly, the existing electrospinning technology is used to prepare the blend nanofiber film, such as figure 1 as shown in c. After that, 80 mg of carbon nanotubes were dispersed in 100 ml of ethanol solution, and a 0.8 mg / ml solution was uniformly formed by ultrasonic dispersion, and then the prepared blend nanofiber film was put into an ethanol solution containing CNTs, and then the solution was placed on Ultrasound is carried out in the ultrasonic instrument, the time is 1min, and the power is 40W. After the ultrasonic wave, the fiber membrane becomes black, as figure 1 d, Schematic diagram in which CNTs ...
Embodiment 2
[0025] (1) Weigh 1.3 g of TPU, 0.325 g of PES, and 8.375 g of DMF. The ratio of PES to TPU is 1:4, and the mass fraction of TPU is 13%. DMF was used as a solvent, TPU and PES were dispersed in DMF, and magnetically stirred at 60 ºC for 8 hours until a homogeneous solution was formed. After the solution is stirred evenly, the blend nanofiber film is prepared by using the existing electrospinning technology. Afterwards, 100mg of carbon nanotubes were dispersed in 100ml of ethanol solution, and a 1mg / ml solution was uniformly dispersed by ultrasonic dispersion, and then the prepared blend nanofiber film was put into the ethanol solution of CNTs, and then the solution was placed on the ultrasonic instrument Ultrasound was carried out in the medium, the time was 5min, and the power was 80W. The microscopic morphology of the prepared nanofibrous membrane was observed with a scanning electron microscope as follows: image 3 c. The content of carbon nanotubes in the nanofiber film w...
Embodiment 3
[0027] (1) In the experiment, the spinning solution was prepared by taking 1.4 g of TPU, 0.28 g of PES, and 8.32 g of DMF. The mass ratio of PES to TPU was 1:5, and the mass fraction of TPU was 14%. DMF was used as a solvent, TPU and PES were dispersed in DMF, and magnetically stirred at 60°C for 8 hours until a homogeneous solution was formed. After the solution is stirred evenly, the blend nanofiber film is prepared by using the existing electrospinning technology. Afterwards, 120 mg of carbon nanotubes were dispersed in 100 ml of ethanol solution, and a 1.2 mg / ml solution was uniformly dispersed by ultrasonic dispersion, and then the prepared blend nanofiber film was put into an ethanol solution containing CNTs, and then the solution was placed on Ultrasonic was carried out in the ultrasonic instrument, the time was 10min, and the power was 120W. The microscopic morphology of the prepared nanofibrous membrane was observed with a scanning electron microscope, as shown in i...
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