▎ 摘　　要

NOVELTY - Preparing modified graphene oxide comprises (i) dispersing graphene oxide in N,N-dimethylformamide under conditions of condensation and reflux, and subjecting thionyl chloride to acid chloride reaction to obtain the reaction product; (ii) washing the reaction product obtained in step (i) with an organic solvent, and drying in a vacuum oven to obtain an intermediate product; (iii) mixing the intermediate product obtained in step (ii) with stearyl alcohol, triethylamine, toluene, and N,N-dimethylformamide, and stirring to disperse the particles and fully dissolve the stearyl alcohol; and (iv) placing the mixture obtained in step (iii) under the conditions of condensation and reflux, carrying out a condensation reaction, then filtering the obtained condensation reaction product, washing product obtained by the condensation reaction for many times with an organic solvent to remove unreacted stearyl alcohol, and drying in a vacuum oven. USE - The modified graphene oxide is useful in energy source, temperature control of electronic components, and in construction fields. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the modified graphene-n-octadecane phase change composition material by using the modified graphene oxide, comprising combining modified graphene oxide with n-octadecyl body; (2) modified graphene oxide, is prepared by the preparation method; and (3) modified graphene-n-octadecane phase change composition material is prepared by the method.