Graphene coating as well as preparation method and coating method thereof
A technology of graphene and few-layer graphene, applied in anti-corrosion coatings, conductive coatings, coatings, etc., can solve the problems of thick and brittle coatings, dark colors, poor oil seepage resistance, etc.
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Embodiment 1
[0029] A few-layer graphene coating, comprising few-layer graphene 30wt%, adhesive (PVDF) 20wt%, dispersant (PVC) and surfactant (sodium alkylbenzene sulfonate) 0.01~50wt%, defoamer (Simethicone oil, phenylethyl alcohol oleate, GP type defoamer) 2wt%, solvent (water) balance.
[0030] Preparation method: uniformly disperse the few-layer graphene, dispersant, binder, defoamer and solvent at high speed and high energy to obtain the few-layer graphene coating
[0031] Take 20 parts of the few-layer graphene coating and 80 parts of PMMA, add an appropriate amount of the same solvent>5m / s and stir and disperse for 1 hour. Adjust the solid content to 1-10%. The adjusted slurry is coated on the PET film, and the bulk resistivity of the film is measured to be 10 -2 ohm.cm, the grade of adhesion on PET is grade 1, and the grade of adhesion on aluminum foil is grade 0.
Embodiment 2
[0033] A few-layer graphene coating comprises few-layer graphene 50wt%, adhesive agent (epoxy resin) 18wt%, dispersant (PVP) and surfactant (sodium polyacrylate) 0.5wt%, defoamer (benzene ethanol oleate) 0.5wt%, isopropanol balance.
[0034] Preparation method: uniformly disperse the few-layer graphene, dispersant, binder, defoamer and solvent at high speed and high energy to obtain the few-layer graphene coating
[0035] Get 80 parts of described few-layer graphene coatings, PMMA20 parts, all the other steps are with embodiment 1. The measured bulk resistivity of the thin film is 10 -4 ohm.cm, the adhesion level of PET is 2-1, and the adhesion level of aluminum foil is 1-0.
Embodiment 3
[0037] A few-layer graphene coating comprises few-layer graphene 20wt%, adhesive agent (PEO, PAN) 40wt%, dispersant (PU, CMC) and surfactant (sodium alginate) 5wt%, defoamer ( GP type defoamer) 5wt%, solvent (butanone) balance.
[0038] Preparation method: uniformly disperse the few-layer graphene, dispersant, binder, defoamer and solvent at high speed and high energy to obtain the few-layer graphene coating
[0039] Get 30 parts of described few-layer graphene coatings, PVDF70 parts, all the other steps are with embodiment 1. The measured bulk resistivity of the thin film is 10 -3 ohm.cm, the grade of adhesion on PET is grade 1, and the grade of adhesion on aluminum foil is grade 0.
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