▎ 摘　　要

NOVELTY - A heat storage material comprises graphene oxide as shell, and chemical heat storage material as filler. The chemical heat storage material is mixture of calcium hydroxide and n-octyl hydroxypropyl cellulose. USE - Heat storage material (claimed). ADVANTAGE - The heat storage material has high thermal conductivity, high thermal conductivity, low volume expansion rate, high anti-expansion and deformation effect, high phase transition latent heat value and high thermal storage capacity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of heat storage material, which involves mixing 15-20 g hydroxypropyl cellulose and 400-500 ml dimethylacetamide, adding 3-5 g pyridine and 5-8 g n-octanoic acid, stirring to obtain mixture, adding mixture with 1-3 g catalyst, stirring at 60-70 degrees C for 3-4 hours to obtain product, adding product with 200-300 ml 50 %mass methanol solution, stirring to obtain filter residue, drying residue, adding dried material with 15-20 g calcium hydroxide and 100-120 ml water, mixing, drying, crushing to obtain powder, ultrasonically dispersing 200-300 g graphene oxide powder, 8-12 g sodium dodecylbenzenesulfonate and 500-600 ml water, adding powder, ultrasonically dispersing, filtering to obtain filter cake, drying filter cake, calcining under nitrogen protection, and cooling calcined product.