▎ 摘　　要

NOVELTY - Starch-based full biodegradable green agricultural mulching film comprises corn starch, polyvinyl alcohol and graphene oxide. USE - Used as starch-based full biodegradable green agricultural mulching film. ADVANTAGE - The film has good mechanical property, light transmittance, moisturizing performance, heat preservation performance, moisture preservation performance, and full biodegradable performance, solves the problem that the market is generally polyethylene modified degradable mulching film cannot be completely degraded, and the synthetic polymer material as raw material production of full biodegradable mulching film degradation rate is slow. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the starch-based full biodegradable green agricultural mulching film, comprising (i) taking 2.4-3.6 g corn starch and 100 ml de-ionized water to obtain corn starch gelatinization solution with mass concentration of 2.4-3.6%; (ii) taking 2.4-3.6 g polyvinyl alcohol and 100 ml de-ionized water, and preparing polyvinyl alcohol solution with mass concentration of 2.4-3.6%; (iii) pouring the corn starch gelatinized solution into polyvinyl alcohol solution, adding corn starch, polyvinyl alcohol and 30% glycerol as plasticizer, and stirring uniformly to obtain corn starch/polyvinyl alcohol mixed solution; (iv) taking 50 mg graphene oxide powder and 100 ml de-ionized water, and preparing graphene oxide dispersion liquid with concentration of 0.5 mg/ml; (v) taking the graphene oxide dispersion liquid by 2.4-4.8 ml, adding to the mixed solution of corn starch/polyvinyl alcohol, and stirring uniformly to obtain mixed solution of cornstarch/polyvinyl alcohol/graphene oxide; (vi) adding corn starch/polyvinyl alcohol/graphene oxide mixed solution with solution volume ratio of 1%, where the concentration is 2.5% glutaraldehyde solution, stirring and adjusting the pH of the solution to 4 to obtain starch-based biological fully-degradable film casting film liquid; and (vii) pouring the starch-based biodegradable mulching film casting film liquid on one side of polytetrafluoroethylene plate, coating and drying.