Preparation method of solid-solid phase-change material immobilized by chemical cross-linking method

Abstract

The invention relates to a preparation method of a solid-solid phase-change material immobilized by a chemical cross-linking method. The method comprises the following steps: dissolving polyethylene glycol acrylate into deionized water, adding a cross-linking agent and an initiator, increasing the temperature of a system to 70-80 DEG C, reacting for 2-5 hours to form hydrogel with a crosslinked network structure, and drying the hydrogel at the temperature of 35 DEG C for 24 hours to get the solid-solid phase-change material, namely polyethylene glycol acrylate gel, wherein the weight ratio ofthe cross-linking agent to the polyethylene glycol acrylate is 1:(200-7):20, the weight ratio of the initiator to the polyethylene glycol acrylate is 1:(200-1):50, and the volume ratio of the deionized water to the polyethylene glycol acrylate is 6:(1-10):1. In the preparation method, the original chemical structure of the polyethylene glycol acrylate is changed through chemical reaction, the solid-solid phase change at the different temperatures can be realized, the cross-linking degree of a product is changed by controlling the reaction conditions, and the phase change temperature and the phase change enthalpy are further regulated so as to meet the different actual requirements.

Description

technical field

[0001] The invention relates to the technical field of phase change energy storage materials, in particular to a preparation method of a solid-solid phase change material immobilized by a chemical crosslinking method. Background technique

[0002] The development of heat-storing and temperature-regulating fibers not only realizes the recycling of energy and alleviates the energy crisis, but also its functionality meets people's growing material needs. At present, the phase change materials used as heat storage and temperature regulating fibers are mostly focused on the solid-liquid phase transition with high phase transition enthalpy. However, its inherent liquid phase transition has caused technical problems of difficult packaging, even the most mature microcapsules The law is also difficult to be accepted by the public because of its high cost. From the perspective of the preparation method of heat-storing and temperature-regulating fibers, the current app...

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