Method for preparing phase-change membrane with aerogel

Abstract

The invention provides a method for preparing a phase-change membrane with aerogel. According to the method, a polymer membrane (PET (polyethylene terephthalate), PP (polypropylene) and PE (polyethylene)) of 10-500[mu] m is adopted as a substrate, a composite phase-change coating (0.1-3mm) consisting of aerogel, a phase-change material, a heat conduction material and a resin is used, and the massratios of different parts are as follows: the aerogel (5-50wt%), the phase-change material (10-90wt%), the heat conduction material (1-20wt%) and the resin (1-20wt%). The method is simple in process and applicable to on-scale production, and the phase-change membrane prepared by using the method has a high enthalpy value and a high heat conduction coefficient, and is excellent in product quality.

Description

technical field [0001] The invention relates to the field of nanomaterials, in particular to a preparation method of an aerogel-containing phase change film. Background technique [0002] Silica airgel is composed of 1-100nm particles, forming a porous nanomaterial. The material has up to 400-1500m 2 / g specific surface area and high porosity of 89-99.8%, therefore, silica airgel has low thermal conductivity, ultra-low density, and low dielectric constant. The material is widely used in thermal insulation, circuit electronics, catalytic filtration and other industries. [0003] Liquid-solid phase change materials have the advantages of wide phase transition temperature, stable chemical properties, high latent heat, and low cost. However, in actual use, the leakage problem caused by the liquid phase limits its application. At present, researchers use airgel, graphene, carbon nanotubes and other porous materials combined with phase change materials to solve the leakage pro...

AI Technical Summary

Problems solved by technology

However, in actual use, the liquid phase will cause leakage problems, which limits its application.