Low temperature phase change cool storage agent and preparation method thereof

Abstract

The invention discloses a low temperature phase change cool storage agent and a preparation method thereof. The low temperature phase change cool storage agent comprises, by mass, 8% to 19.5% of ammonium chloride, 0.1% to 2% of dipotassium phosphate, 0.1% to 1% of sodium hydroxyethyl cellulose, 0.05% to 0.1% of nano-titanium dioxide and the balance deionized water. The preparation method includes adding the ammonium chloride, the dipotassium phosphate and the nano-titanium dioxide in the deionized water, uniformly mixing to obtain a solution, heating the solution to 70 DEG C to 80 DEG C, then slowly adding the sodium hydroxyethyl cellulose in the solution under high speed stirring, and uniformly stirring to obtain the low temperature phase change cool storage agent. Compared with low temperature phase change cool storage agents and preparation methods in prior art, the low temperature phase change cool storage agent and the preparation method thereof have the advantages that the low temperature phase change cool storage agent is low in phase transition temperature, free of salt crystal separation, high in phase change potential heat value, free of potential heat value decay after overturn circulation and the like, raw materials are easy to obtain, the production is easy, the low temperature phase change cool storage agent is safe and non-toxic, and the low temperature phase change cool storage agent has a potential application value in food fresh keeping and biological vaccine cold chain transportation.

Description

technical field [0001] The invention relates to the technical field of energy storage, in particular to a low-temperature phase-change cold storage agent and a preparation method thereof. Background technique [0002] With the development of the economy and the improvement of people's living standards, the quality requirements for fresh fruits and vegetables and biological products in off-site refrigerated transportation are getting higher and higher. The core technology of cold storage transportation. Domestic cold storage agents generally have defects such as high phase transition temperature and low latent heat value. CN101921578 discloses a cold storage agent, which is composed of polymers and water, and its phase transition temperature is 0°C, which cannot reach low temperatures; the patent number is CN90109434. The cold storage agent of X is composed of potassium chloride and water, which has a high decay rate due to phase separation; foreign low-temperature cold stor...

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Problems solved by technology

Domestic cold storage agents generally have defects such as high phase transition temperature and low latent heat value. CN101921578 discloses a cold storage agent, which is composed of polymers and water, and its phase transition temperature is 0°C, which cannot reach low temperatures; the patent number is CN90109434. The cold storage agent of X is composed of potassium chloride and water, which has a high decay rate due to phase separation; foreign low-temperature cold storage agents are expensive and cannot be popularized

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