▎ 摘　　要

NOVELTY - Preparing alpha-zinc phosphorus/graphene oxide ( alpha -ZrP/GO) flame retardant involves taking phosphoric acid and deionized water respectively, and completely dissolving the phosphoric acid in deionized water, and preparing a phosphoric acid solution with a molar volume concentration of 3-12 mol/mL, The 4 g of zirconyl chloride octahydrate (ZrOCl2.8H2O) powder is dispersed in a 60 mL graphene oxide solution with a mass volume concentration of 2 mg/mL. The ZrOCl2.8H2O powder and graphene oxide solution are taken respectively, added ZrOCl2.8H2O powder to the graphene oxide solution, and ultrasound to obtain a dispersion. The phosphoric acid solution and the dispersion liquid are taken at a volume ratio of 1-2.5:1, and dropped the phosphoric acid solution into the dispersion liquid drop by drop under the condition of high-speed magnetic stirring, and after the dripping is completed, keep it at 200-240 degrees C for 5-8 hours. USE - Method for preparing alpha -ZrP/GO flame retardant for improving the flame retardancy of polyvinyl alcohol (claimed). ADVANTAGE - The method enables to prepared alpha -ZrP/GO flame retardant, that overcomes the disadvantages of low flame retardant efficiency and high content of traditional flame retardants, and cost is low, the preparation process is simple, the preparation period is short, and it is environmentally friendly and non-toxic. DETAILED DESCRIPTION - Preparing alpha-zinc phosphorus/graphene oxide ( alpha -ZrP/GO) flame retardant involves taking phosphoric acid and deionized water respectively, and completely dissolving the phosphoric acid in deionized water, and preparing a phosphoric acid solution with a molar volume concentration of 3-12 mol/mL, The 4 g of zirconyl chloride octahydrate (ZrOCl2.8H2O) powder is dispersed in a 60 mL graphene oxide solution with a mass volume concentration of 2 mg/mL. The ZrOCl2.8H2O powder and graphene oxide solution are taken respectively, added ZrOCl2.8H2O powder to the graphene oxide solution, and ultrasound to obtain a dispersion. The phosphoric acid solution and the dispersion liquid are taken at a volume ratio of 1-2.5:1, and dropped the phosphoric acid solution into the dispersion liquid drop by drop under the condition of high-speed magnetic stirring, and after the dripping is completed, keep it at 200-240 degrees C for 5-8 hours. The reaction is completed, cooled to room temperature naturally, centrifuge to collect the product, washed the product with deionized water and centrifuge to obtain a semi-finished product, washed the semi-finished product with ethanol, centrifuge, dried, and cooled to room temperature to obtain alpha -ZrP/GO flame retardant. An INDEPENDENT CLAIM is included for a application method of the alpha -ZrP/GO flame retardant for improving the flame retardancy of polyvinyl alcohol, which involves taking PVA particles and alpha -ZrP/GO flame retardant, dissolve the poly(vinyl alcohol) (PVA) particles in water to prepare a PVA solution, adding alpha -ZrP/GO flame retardant, and stirring uniformly to obtain a mixed jelly, pouring the mixed jelly into a plastic mold, heat and drying, and obtaining a polyvinyl alcohol film with improved flame retardancy.