High-phase-change thermoset phase change material and preparation method thereof

Abstract

The invention discloses a high-phase-change thermoset phase change material. The high-phase-change thermoset phase change material is prepared form expandable graphite of which the expansion multiplying power is 100-500mL / g and erythritol which is adsorbed into gaps of the expandable graphite, wherein the weight of the expandable graphite accounts for 10-20 percent of the total weight, and the balance is erythritol. The method comprises the following steps of: heating erythritol in an oil bath of 125-135 DEG C according to a certain proportion till the erythritol is fully molten for later use; putting expandable graphite into a vacuum drying oven; drying at the temperature of 65-75 DEG C under the vacuum degree of -0.09MPa for 8-12 hours; taking out, and putting into a muffle furnace of which the temperature is 700-800 DEG C for calcining for 30-90 seconds to form expansion graphite with a microcellular structure for later use; stirring the two kinds of materials in the oil bath for 1-1.5 hours; and naturally cooling to obtain a product. The high-phase-change thermoset phase change material is simple in structure; and according to the porous adsorption characteristic of the expansion graphite and the high-phase-change potential heat value of the erythritol, the product has higher phase change potential heat value than a phase change material prepared in the prior art.

Description

technical field [0001] The invention relates to the technical field of functional composite materials, in particular to a high-phase-change heat-setting phase-change material and a preparation method thereof. Background technique [0002] Phase change materials refer to substances that change shape with temperature and can provide latent heat. The latent heat of phase change materials can be used to store or release energy to produce various facilities that improve energy utilization. The commonly used phase change materials are solid-liquid phase change materials, that is, the phase change process is from solid to liquid. Or change from liquid to solid state, at this time the phase change material will absorb or release a large amount of latent heat. Phase change materials are more and more widely used in solar energy utilization, aerospace, peak shifting of heat load, new energy-saving building materials, waste heat recovery and air conditioning technology. It is popular...

AI Technical Summary

Problems solved by technology

However, there is a common problem at present. The solid-liquid phase change material is easy to leak after producing liquid during the phase change process. At present, microencapsulation of the phase change material is generally used to solve this problem. For example, Chinese patent CN102492397 discloses a sugar The latent heat value of alcohol-based phase change material microcapsules is about 230J / g, but due to the limitation of microencapsulation rate, the high latent heat density of sugar alcohol cannot be fully utilized, and the cost of microencapsulation is very high, making it difficult to realize industrialization Production