▎ 摘　　要

NOVELTY - The preparation method of natural polymer material using rare earth metal ion coordination involves dissolving carboxyl-modified graphene oxide and natural high molecular compound in de-ionized water to prepare high-viscosity solution, loading high-viscosity solution into an open mold, adding into the rare earth metal salt solution, reacting, immersing natural polymer cross-linking network with rare earth metal ion coordination reaction in de-ionized water, and removing residual rare earth metal ions in the natural polymer cross-linking network by ion diffusion method. USE - Preparation method of natural polymer material using rare earth metal ion coordination (claimed). ADVANTAGE - The method enables preparation of natural polymer material with excellent biocompatibility, biodegradability, improved mechanical strength, and mild reaction condition, by simple and easy process. DETAILED DESCRIPTION - The preparation method of natural polymer material using rare earth metal ion coordination involves dissolving carboxyl-modified graphene oxide and natural high molecular compound in de-ionized water to prepare high-viscosity solution, loading high-viscosity solution into an open mold, adding into the rare earth metal salt solution, reacting at room temperature for 6-12 hours, immersing natural polymer cross-linking network with rare earth metal ion coordination reaction in de-ionized water, and removing residual rare earth metal ions in the natural polymer cross-linking network by ion diffusion method, where the mass ratio of carboxyl-modified graphene oxide and natural high molecular compound is x:1, and the concentration of the rare earth metal ion is 0.01-0.05 mol/l. x=0.001-0.02.