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Macromolecule material cold keeping agent making method

A technology of polymer material and cooling agent, which is applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of high cost, slow water absorption, and small water absorption, and achieve the effect of low cost of raw materials and simple preparation process.

Inactive Publication Date: 2005-01-26
TSINGHUA UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of the cold storage agent prepared by the above technical scheme are short cold storage time, slow water absorption speed, small water absorption, high cost, and some also contain harmful substances and narrow phase transition temperature range.

Method used

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  • Macromolecule material cold keeping agent making method
  • Macromolecule material cold keeping agent making method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Using water as a solvent, stirring and preparing an aqueous solution of carboxymethyl cellulose with a mass concentration of 0.2%; adding a neutralization degree of 70% and a mass composition of 0.87 parts of acrylic acid, 0.1 part of hydroxyethyl methacrylate and 0.03 parts of carboxymethyl cellulose to the solution Part of maleic anhydride monomer, mix uniformly; then add 0.03% ethylene glycol diacrylate crosslinking agent of total monomer mass, stir evenly; finally add potassium persulfate initiator of 0.1% total monomer mass, mix uniformly, React for 1 hour at 55°C and normal pressure. Dry at 100°C for 2.5 hours, crush to 200 meshes, and obtain a white powdery polymer material, which is mixed with water to form a mixture with a concentration of 0.7%, and it can be fully dissolved in 40 seconds, forming a translucent colloid in actual use coolant. The solid-liquid phase transition temperature of the cold storage agent is -3°C, the specific heat of colloid is 4.9kJ / k...

Embodiment 2

[0029] Using water as a solvent, stir to form an aqueous solution of sodium polyacrylate with a mass concentration of 0.6%; add 0.8 parts of acrylic acid with a neutralization degree of 60% and a mass composition of 0.13 parts of hydroxyethyl methacrylate and 0.07 parts of Maleic anhydride monomer, mix well; then add ethylene glycol diacrylate crosslinking agent with 0.1% of total monomer mass, stir well; finally add potassium persulfate initiator with 0.02% total monomer mass, mix well, 70°C , Reverse 0.5 hours under normal pressure conditions. Dry at 110°C for 2 hours, crush to 150 meshes, and obtain a white powdery polymer material, which is mixed with water to form a mixture with a concentration of 0.85%, and it can be fully dissolved in 60 seconds, forming a translucent colloid in actual use coolant. The solid-liquid phase transition temperature of the cold storage agent is -2°C, the specific heat of colloid is 4.7kJ / kg.K, and the latent heat of phase transition is 324kJ...

Embodiment 3

[0031] Using water as a solvent, stir to form an aqueous solution of carboxymethyl starch with a mass concentration of 1%; add a neutralization degree of 75% and a mass composition of 0.9 parts of acrylic acid and 0.1 part of hydroxyethyl methacrylate monomer to the solution, Mix evenly; then add 0.3% of the total monomer mass of ethylene glycol diacrylate crosslinking agent, and stir evenly; finally add 0.5% of the total monomer mass of potassium persulfate initiator, mix evenly, and react at 45°C under normal pressure conditions 1.5 hours. Dry at 105°C for 4 hours, crush to 200 meshes, and obtain a white powdery polymer material, which is mixed with water to form a mixture with a concentration of 1.1%, and it can be fully dissolved in 80 seconds, forming a translucent colloid in actual use coolant. The solid-liquid phase transition temperature of the cold storage agent is -5°C, the specific heat of colloid is 5.2kJ / kg.K, and the latent heat of phase transition is 343kJ / kg. ...

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Abstract

The invention discloses a macromolecule material cold keeping agent making method which consists of, preparing aqueous solution of polymers having strong hydrophilic radicals in the molecular structure, charging propenoic acid, hydroxyethyl methacrylate and maleic anhydride monomer, mixing homogeneously, charging bis-ethyl acrylate cross linking agent, agitating homogeneously, charging potassium peroxodisulfate initiating agent, mixing homogeneously, obtaining macromolecular material, dissolving into water of different mass.

Description

technical field [0001] The invention relates to a preparation method of a polymer material cold storage agent, which belongs to the technical field of cold storage, and is especially suitable for cold storage and preservation of food, vegetables, meat, beverages and flowers during long-distance transportation, as well as medical drugs, biological products, vaccines, etc. low temperature protection. Background technique [0002] With the rapid development of human society, people have higher and higher requirements for the original taste of food, long-distance transportation of a large number of fresh food and native products, and small batch, multi-variety, multi-frequency, short-term delivery requirements Therefore, in recent years, the refrigerated transportation technology in the cold chain has developed rapidly. [0003] Refrigerated transportation is mainly divided into two categories: mechanical refrigerated transportation and cold storage transportation. If long-dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 石文星林晗李援朝肖健陈京生李先庭赵彬
Owner TSINGHUA UNIV
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