Porous composite organic phase change heat-storing material and preparation method thereof

Abstract

The invention discloses a porous composite organic phase change heat-storing material and a preparation method thereof, belonging to the field of energy materials. The phase change heat-storing material is a combination of n-octadecane and n-eicosane; a molecular sieve is taken as a carrier; the mass ratio of the phase change heat-storing material to the molecular sieve is 1:(1-5); and the mass ratio of the n-octadecane to the n-eicosane is 3:7-7:3. The invention further discloses a preparation method of the phase change heat-storing material. High-stability alkane is taken as the phase change heat-storing material, and the upper and lower limits of a phase change temperature are adjusted by combining the n-octadecane with the n-eicosane, so that the requirement of the phase change heat-storing material for an outer wall body of a building is met; moreover, the phase change heat-storing material is non-corrosive, and is prevented from being overcooled; and the molecular sieve is taken as a carrier, so that the problem of permeation of the phase change heat-storing material during heat absorption melting is solved, and the overall heat stability is enhanced.

Description

technical field

[0001] The invention relates to the field of energy materials applied to building exterior walls, in particular to a porous composite organic phase-change thermal storage material and a preparation method thereof. Background technique

[0002] The temperature of a certain material rises after absorbing heat energy, that is, it uses the temperature difference to store heat as a sensible heat storage material. The material undergoes phase change after absorbing heat energy but the temperature remains the same or the temperature changes very little is the latent heat storage material. The heat storage capacity of materials using phase change energy storage is far greater than that of sensible heat storage materials, and it has the characteristics of constant temperature absorption and heat release. During the process of its own phase change, the phase change heat storage material absorbs the heat of the environment and releases heat to the environment when need...