Graphene multifunctional film sensor and preparation method thereof
A thin-film sensor and graphene thin-film technology, applied in instruments, scientific instruments, and thermometers using electric/magnetic elements that are directly sensitive to heat, can solve the problems of high environmental pollution and poor sensor performance, and achieve excellent transmission The effect of sensibility
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[0036] In the present embodiment, the graphene multifunctional film sensor 10 includes: a flexible substrate 20, a layered graphene film 30, a silver paste, a copper wire, and an elastic polymer material 40; wherein the layered structure The graphene film 30 of the described flexible substrate 20 covers on the surface, obtains layered graphene multifunctional film electrode; Described silver paste and copper wire cover the two ends of described layered graphene multifunctional film electrode, obtain signal Exportable conductive layered graphene multifunctional thin film electrode; the elastic polymer material 40 is uniformly coated on the surface of the conductive layered graphene multifunctional thin film electrode; the graphene film of the layered structure is obtained by reducing The embossing and embossing equipment is formed by printing graphene conductive ink layer by layer on the surface of the flexible substrate by means of decompression embossing.
[0037] It should b...
Embodiment 1
[0074] The polyethylene terephthalate film was repeatedly washed 3 times with ethanol and acetone, dried at 80°C, and the cleaned flexible substrate was evenly adsorbed on the stage. Take graphene with a mass ratio of 50%, add 15% acrylic resin, 7% diethylene glycol and 27.85% deionized water in a 100ML beaker, stir at 300r / min for 30min, continue to add 0.15% SPG- 10 defoamers were stirred at 300r / min for 60min to obtain graphene conductive ink. Add 200Ml graphene conductive ink into the material bin through the material addition port, and print the graphene conductive ink onto the surface of the polyethylene terephthalate film under the condition of an external pressure of 0.3MPa to obtain a single-layer graphene film. During the printing process, the pressure was gradually reduced to 3000Pa, and the printing pressure was 0.27MPa, 0.24MPa, 0.21MPa, and 0.18MPa each time. The printing process was repeated five times to obtain a graphene multifunctional thin film electrode. C...
Embodiment 2
[0076] The polyimide film was repeatedly washed with ethanol and acetone for 5 times, dried at 80° C., and the cleaned flexible substrate was evenly adsorbed on the stage. Take graphene with a mass ratio of 70%, add 14.9% polyurethane, 5% ethylene glycol and 10% deionized water in a 100ML beaker, stir at 500r / min for 20min, continue to add 0.1% of 2020 defoamer at 500r After stirring for 60min under the / min, graphene conductive ink was obtained. Add 200Ml graphene conductive ink into the material bin through the material addition port, and print the graphene conductive ink onto the surface of the polyimide film under the condition of an external pressure of 0.4MPa to obtain a single-layer graphene film. In the subsequent printing process, The pressure was reduced to 4000Pa successively, and the printing pressure was 0.36MPa, 0.32MPa, 0.28MPa, 0.24MPa, 0.20MPa each time, and the printing process was repeated six times to obtain a graphene multifunctional thin film electrode. ...
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