A low-temperature phase-change material with a phase-change temperature of -26 to -28°C

Abstract

The invention relates to the field of phase change energy accumulation, and particularly relates to a low-temperature phase-change material with the phase change temperature of 26-28 DEG C, and a preparation method thereof. The low-temperature phase-change material is prepared from the following raw materials in parts by weight: 90-98 parts of a main energy accumulation agent, 1-5 parts of a nucleating agent, and 1-5 parts of a thickener. The main energy accumulation agent is an inorganic salt-organic salt-alcohol aqueous solution, the inorganic salt is a chloride, and the organic salt is organic sodium salt. The phase-change material adopts an inorganic-organic multi-composite material and combines the advantages of two types of phase-change materials, thus being good in stability, wide in sources of raw materials, low in cost, non-toxic and tasteless, and safe and reliable; the preparation technique is simple, the phase change temperature of the phase-change material can be adjusted within 26-28 DEG C due to different proportions of the inorganic salt, organic salt and alcohols, the cold insulation time is long, and the cycle life is long; and the phase-change material can be popularized and used in the cold-chain transportation of foods or medical products.

Description

technical field [0001] The invention relates to the field of phase change energy storage, in particular to a low-temperature phase change material with a phase change temperature of -26 to -28°C. Background technique [0002] Phase change energy storage materials are one of the hotspots in the development and research of energy utilization and material science at home and abroad in recent years. Phase change energy storage is also called latent heat energy storage. Its principle is to use phase change materials to absorb / release energy to store / release heat when the phase state changes. Phase-change energy storage materials largely solve the problem of energy mismatch in time and space. [0003] With the increase of people's awareness of environmental protection, the shortage of energy and the problem of environmental pollution in the process of energy use have led to the urgent development and use of new energy sources, such as intermittent clean energy such as solar energ...

AI Technical Summary

Problems solved by technology

[0004] Defects in the existing technology: product transportation needs to be maintained in an extremely low temperature environment, but the phase change temperature of the currently used phase change materials is mostly low to medium temperature, and the temperature cannot fluctuate within a small range. The stability is poor. The single inorganic hydrated salt phase change material has general supercooling and phase separation phenomenon. Although the single organic phase change material has no supercooling and phase separation phenomenon, its phase change latent heat is small.