Polyethersulfone resin/graphene nanosheet porous nanocomposite material, preparation method and use thereof
A graphene nanosheet, nanocomposite material technology, applied in the direction of analyzing materials, material resistance, material analysis by electromagnetic means, etc., can solve the problems of reducing gas sensing efficiency and strength, limiting material properties, long equilibration time, etc. Achieve the effect of light weight, low energy consumption and high speed
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Embodiment 1
[0024] (1) In the experiment, graphite nanosheets (GNPs) were fabricated first. Graphite intercalation compounds (GIC) undergo rapid expansion at high temperature to obtain expanded graphite (EG). The as-prepared EG was dispersed in water, followed by ultrasonic treatment for 30 min, and finally vacuum-dried at 50 °C for 24 h. Preparation of porous GNPs / PES nanocomposites: 1 g of PES powder was dissolved in 9 g of DMF, stirred magnetically at 60 °C for 4 hours, and then a uniform PES solution was obtained; after that, 0.0005 g of graphene nanosheets were ultrasonically dispersed in 9 g of DMF for 0.5 Hour. Then, the two prepared solutions were mixed as figure 1 a is the photo of the mixed solution of PES and graphene nanosheets. This was followed by magnetic stirring at 60° C. for 6 hours. Afterwards, the uniformly dispersed PES / graphene nanosheet solution was placed in a water-storage airtight container for 12 h, and then the precipitated nanocomposite was immersed in wat...
Embodiment 2
[0026] (1) Dissolve 1.5g of PES powder in 8.5g of DMF, stir magnetically at 62°C for 5 hours, and then obtain a uniform PES solution; then 0.038g of graphene nanosheets are ultrasonically dispersed in 8.5g of DMF for 1 hour. Then, the prepared two solutions were mixed. This was followed by magnetic stirring at 62°C for 7 hours. Afterwards, the uniformly dispersed PES / graphene nanosheet solution was placed in a water-storage airtight container for 13 h, and then the precipitated nanocomposite was immersed in water at 87 °C for 13 h to exchange out most of the DMF. Afterwards, the graphene nanosheets / PES were freeze-dried to remove residual water and DMF. Finally, a porous PES / graphene nanosheet membrane is obtained. Wherein 1d is a scanning electron micrograph of the composite material prepared in this example. (2) Conductivity test, cut the polyethersulfone resin / graphene nanosheet porous composite into long strips, connect wires at both ends and coat with conductive silver...
Embodiment 3
[0028] (1) Dissolve 2g of PES powder in 8g of DMF, stir magnetically at 65°C for 6 hours, and then obtain a uniform PES solution; then 0.1g of graphene nanosheets are ultrasonically dispersed in 8g of DMF for 1.5 hours. Then, the prepared two solutions were mixed. This was followed by magnetic stirring at 65°C for 8 hours. Afterwards, the uniformly dispersed PES / graphene nanosheet solution was placed in a water-storage airtight container for 14 h, and then the precipitated nanocomposite was immersed in water at 90 °C for 14 h to exchange out most of the DMF. Afterwards, the graphene nanosheets / PES were freeze-dried to remove residual water and DMF. Finally, a porous PES / graphene nanosheet membrane is obtained. (2) Conductivity test, cut the polyethersulfone resin / graphene nanosheet porous composite into long strips, connect wires at both ends and coat with conductive silver paste, cure at 80ºC for 12 hours, use a resistance tester after curing Measure the resistance of the ...
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