Controllable sol-gel method for preparing polyethylene glycol phase-change heat-conducting composite material and application

The invention discloses a controllable sol-gel method for preparing polyethylene glycol phase-change heat-conducting composite material and an application. The method comprises the following steps: dispersing polyethylene glycol in tetraethyl silicate, and then adding metal hydroxide to a solution to form sol. Polyethylene glycol is dispersed in tetraethyl silicate, the cost is low, and the dispersion effect is good. Compared with an existing sol-gel method, the controllable sol-gel method has the advantages that metal hydroxide is introduced and a two-step gelation process is formed; the degree of gelation can be controlled according to the type of metal hydroxide, gelation temperature and gelation time; finally, the gel is directly formed by counter-ion ammonia ions. The composite material with controllable gelation degree can be obtained by adjusting and controlling the conditions, and thermal stability of the composite material is enhanced while heat conductivity is improved. 本发明公开了一种可控溶胶凝胶法制备聚乙二醇相变导热复合材料