▎ 摘　　要

NOVELTY - Preparing composite phase change material based on graphene oxide comprises e.g. synthesizing graphene oxide, adding into three-mouth bottle, adding prepared graphene oxide and absolute ethyl alcohol, placing the three-mouth flask, carrying out ultrasonic dispersing uniformly to obtain oxidized graphene suspension, where the organic phase changing agent is lauric acid or stearic acid and dissolving in anhydrous ethanol to obtain lauric acid or stearic acid dispersion. USE - The method is useful for preparing composite phase change material based on graphene oxide(claimed). ADVANTAGE - The method has good thermal conductivity, heat absorption and heat release time is shorter, high phase change latent heat value, phase change point is located at about 30 degrees C. DETAILED DESCRIPTION - Preparing composite phase change material based on graphene oxide comprises (i) synthesizing graphene oxide, (ii) adding into three-mouth bottle, adding step (i) prepared graphene oxide and absolute ethyl alcohol, placing the three-mouth flask, carrying out ultrasonic dispersing uniformly to obtain oxidized graphene suspension, where the organic phase changing agent is lauric acid or stearic acid and dissolving in anhydrous ethanol to obtain lauric acid or stearic acid dispersion, (iii) using step (ii) lauric acid or stearic acid before dispersion and carrying out electromagnetic stirring uniform graphene oxide suspension, placing the suspension in the ultrasonic shaking for many minutes, (iv) heating the suspension obtained in the step (iii) and stirring and refluxing, distilling and recycling the organic solvent, drying the product to obtain the required composite phase change material.