Add PVA powder to distilled water at 80°C to obtain a 7wt% PVA aqueous solution, then add CS powder and different amounts of graphene oxide (GO) dispersions to the PVA solution and stir evenly to form a mass ratio of CS, PVA, and GO The suspension is 10:90:0.1 and the mass ratio of CS, PVA, GO is 10:90:0.5.
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