Hydrous salt cold storage agent with phase-transition temperature of 5-8 DEG C and preparation method thereof

Abstract

The invention relates to a hydrous salt cold storage agent with the phase-transition temperature of 5-8 DEG C and a preparation method thereof. The cold storage agent comprises the following components in percentage by weight: 68.5-86.9% of a main energy storage agent, 1-3% of a supercooling prevention agent, 1-3% of an acid and alkali neutralizer, 1-5% of a thickening agent, 10-20% of a cooling agent, 0.1-0.5% of a crystal habit modifier and free water having the same molar ratio as that of sodium sulfate decahydrate. The phase-transition temperature of the cold storage agent can be adjusted in the range of 5-8 DEG C, the latent heat of phase change ranges from 20.0 J / g to 140 J / g, and the cold storage agent is long in cold-keeping time, simple in preparation process, low in cost, non-toxic, odourless, pollution-free and gelatinous and can be widely used for cold-chain transportation of fruits and vegetables, biomedical products and the like.

Description

technical field [0001] The invention relates to a hydrated salt cold storage agent, which is suitable for the cold chain transportation of fruits, vegetables, food, etc. and the low temperature protection of biomedical products. The invention also relates to a preparation method of a hydrated salt cold storage agent, which belongs to the technical field of packaging materials. Background technique [0002] At present, the application of cold storage technology is mostly concentrated in the fields of air conditioning and cold storage. However, with the rapid development of the economy and the continuous improvement of people's living standards, consumers' demand for fresh, high-quality and frozen processed food is increasing. In the process of cold chain transportation, a cold storage agent at a suitable temperature is also required to cool and keep the product fresh, thereby prolonging the shelf life of the product and reducing the loss before consumption. [0003] However,...

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Problems solved by technology

[0004] Aiming at the existing problems of cold storage agents in the same temperature range on the market, such as low latent heat of phase change, complex preparation process and high use cost, the present invention mainly provides a hydrated salt cold storage agent whose phase transition temperature is between 5 It can be adjusted between ~8°C, and the latent heat of phase change is between 120~140J / g. packaging products