Thermal insulation material, preparation method and thermal insulation clothes

The invention relates to the technical field of heat insulation, and particularly discloses a heat insulation material, a preparation method and a heat preservation garment. The thermal insulation material is prepared from the following components in parts by weight: 30 to 50 parts of aerogel powder, 5 to 10 parts of glass fiber, 20 to 40 parts of polytetrafluoroethylene, 10 to 20 parts of pentaerythritol phosphate, 5 to 10 parts of dimethyl phthalate and 10 to 20 parts of organic silicon resin. The preparation method of the thermal insulation material comprises the following steps: uniformly mixing the pentaerythritol phosphate and the dimethyl phthalate, adding the aerogel powder and the glass fiber, heating for reaction, continuously adding the polytetrafluoroethylene and the organic silicon resin, uniformly mixing, injecting into a mold for compression molding, drying, and cutting to obtain the sheet-shaped thermal insulation material. The heat preservation garment comprises an outer layer, a middle layer