Binary organic phase change coolant used at non-refrigeration low temperature zones, and preparation method thereof

Abstract

The invention belongs to the technical field of coolant appliances, and especially relates to a binary organic phase change coolant used at non-refrigeration low temperature zones, and a preparation method thereof. The binary organic phase change coolant used at non-refrigeration low temperature zones is composed of, by weight, 5.26 to 8.74% of myristyl alcohol, and 91.26 to 94.74% of tetradecane.The binary organic phase change coolant is invented for special products including biological products such as vaccine and sour milk beverage. The added value is high; and application prospect of thebinary organic phase change coolant with a phase change temperature of 4.5 DEG C is promising.

Description

technical field [0001] The invention belongs to the technical field of cooling agent appliances, and in particular relates to a binary organic phase-change cooling storage agent in a non-freezing low-temperature region and a preparation method thereof. Background technique [0002] Material transportation involves many temperature-sensitive commodities, such as fresh fruits and vegetables, vaccines, probiotic drinks, etc. Cold chain logistics can guarantee their quality. Cold chain transportation is a supply chain system with the core requirement of maintaining a low-temperature environment. It is a low-temperature logistics process based on refrigeration technology and using refrigeration technology as a means. Cold storage technology uses the principle of absorbing heat when the phase change material changes from solid to liquid to reduce the temperature of the surrounding environment, which can be applied to cold chain logistics. However, at present, cold chain logistics...

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Problems solved by technology

Chinese patent CN201510182702.0 discloses a composite phase change cool storage agent with a phase change temperature of -4°C to 4°C, which is composed of polyethyleneimine, diatomaceous earth, sodium chloride, zinc oxide and vegetable glue, etc., with complex components , and the cost of polymer materials is high and non-degradable; patent CN201410021345.5 discloses a phase-change cold storage agent for a composite organic aqueous solution, which consists of 2.97-5.88% glycine, 3.62% sorbitol, and the rest is water, and the phase-change temperature is - 7.7~-5.1 ℃, the raw materials are safe and non-toxic, but the phase transition temperature is lower than 0 degrees, direct contact may cause the freezing of biological products such as vaccines and lactic acid bacteria drinks; patent 200810204632.4 discloses a eutectic salt cold storage material, phase transition The temperature is 8.47°C, the latent heat of phase change is 136.07~182.73 J / g, and the degree of supercooling is 2.41°C. The phase transition temperature of this cool storage agent is higher than 8°C, and it cannot be used in non-refrigerated low-temperature regions to maintain the biological activity of the product. supercooling degree and low latent heat of phase change; patent CN201510794363.1 discloses a cold storage agent composed of a mixture of polymers and inorganic salts, potassium chloride is the main energy storage material, and montmorillonite is used as a nucleating agent. The nucleating agent controls the degree of supercooling, and it needs to be equipped with a designated cold storage box to regulate the temperature in the box to 2-8 ℃ before it can be used to transport vaccines. The cost is high, the reuse rate is low, and the application is difficult.

At the same time, we found that the phase-change cooling agent based on organic matter will shrink significantly when it freezes. In a fixed-shaped hard container, this volume change will cause the container to withstand negative pressure deformation, and it will be easily damaged after repeated use. service life

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