Preparation method of phase change energy storage carbon-plastic composite material

The invention discloses a preparation method of a phase change energy storage carbon-plastic composite material, which comprises the following steps: step 1, soaking bamboo charcoal powder in absolute ethyl alcohol for ultrasonic cleaning, drying, adjusting the moisture content of the bamboo charcoal powder, and putting the bamboo charcoal powder in a high-power microwave emission box for microwave explosion pretreatment; 2, polyethylene glycol 800 and bamboo charcoal powder are mixed, then the bamboo charcoal powder adsorbing the polyethylene glycol is soaked in an isocyanate solution, and the bamboo charcoal powder is placed in a drying oven to be heated after being filtered; grinding and crushing the reacted bamboo charcoal powder, and mixing with low-density polyethylene; step 3, extruding the mixed powder by using a twin-screw extruder, and crushing the extrudate by using a crusher; and 4, cooling the crushed particles after hot pressing to obtain a phase change energy storage carbon-plastic composite ma