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Preparation method of paraffin/polyurethane solid-solid composite double-phase change energy storage material

An energy storage material, polyurethane technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of narrow phase change temperature range, low phase change enthalpy, and limited application fields, and achieve a wide phase change temperature range, The effect of high latent heat of phase change

Active Publication Date: 2015-01-07
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN201210124385.3 has invented a polyurethane solid-solid phase change material with high tensile strength and elongation at break and its preparation method, so that the material not only has the characteristics of solid-solid phase transition, but also has high Mechanical strength (2MPa~35MPa) to meet the needs of temperature regulation and control in occasions with high requirements on mechanical properties, but its phase change enthalpy is lower than 85J / g
[0005] In summary, most of the polyurethane solid-solid phase change materials obtained at present have low phase change enthalpy, narrow phase change temperature range, and the preparation process involves a large amount of toxic and harmful solvents, which limits its application fields.

Method used

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  • Preparation method of paraffin/polyurethane solid-solid composite double-phase change energy storage material
  • Preparation method of paraffin/polyurethane solid-solid composite double-phase change energy storage material

Examples

Experimental program
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Embodiment 1

[0025] After heating and melting the polyethylene glycol with a molecular weight of 10,000, it was placed in a vacuum oven at 120°C for 4 hours of vacuum treatment. Add 40 parts of polyethylene glycol, 6.15 parts of n-octadecane, and 1 part of silicone surfactant into the reaction kettle, control the temperature of the reactants at 80°C, and stir evenly at a stirring rate of 1000 rpm under the protection of nitrogen , then add 6.04 parts of polyol-modified 4,4'-diphenylmethane diisocyanate (U-MDI) and 1.02 parts of 1,4-butanediol (BDO) dropwise in sequence, and continue stirring for 5 minutes after the addition is completed, vacuum Remove air bubbles from the above mixture. The above mixture was poured into a mold preheated to 45°C, and then the mold was put into an oven at 100°C to solidify for 4 hours, and then demoulded after cooling to obtain a light yellow paraffin / polyurethane solid-solid dual phase change energy storage material.

[0026] Differential scanning calorime...

Embodiment 2

[0028] After heating and melting the polyethylene glycol with a molecular weight of 10,000, it was placed in a vacuum oven at 120°C for 4 hours of vacuum treatment. Add 25 parts of polyethylene glycol, 5.56 parts of n-octadecane, and nonylphenol polyethylene glycol (NP-10) into the reactor, control the temperature of the reactants at 60°C, and under nitrogen protection, at 1000rpm Stir evenly at a stirring rate, then add 2.37 parts of U-MDI and 0.41 parts of BDO dropwise in sequence, continue stirring for 5 minutes after the addition is complete, and remove the air bubbles in the above mixture in a vacuum. The above mixture was poured into a mold preheated to 45°C, and then the mold was put into an oven at 100°C to solidify for 4 hours, and then demoulded after cooling to obtain a light yellow paraffin / polyurethane solid-solid dual phase change energy storage material. The latent heat of melting phase transition of the prepared material is 154.8 J / g, the latent heat of crystal...

Embodiment 3

[0030] Polyethylene glycol with a molecular weight of 6000 was selected as the soft segment, heated and melted, and placed in a vacuum oven at 120°C for 4 hours of vacuum treatment. Add 40 parts of polyethylene glycol, 6.15 parts of n-octadecane, and 1.0 part of polyethylene glycol octylphenyl ether (OP-10) into the reaction kettle, and control the temperature of the reactants at 60°C. , Stir evenly at a stirring rate of 1000rpm, then add 6.04 parts of U-MDI and 1.02 parts of BDO dropwise in sequence, continue stirring for 1 min after the addition is completed, and remove the air bubbles in the above mixture in a vacuum. The above mixture was poured into a mold preheated to 45°C, and then the mold was put into an oven at 100°C to solidify for 4 hours, and then demoulded after cooling to obtain a light yellow paraffin / polyurethane solid-solid dual phase change energy storage material. The latent heat of melting phase transition of the prepared material is 110.8 J / g, the latent ...

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Abstract

The invention discloses a preparation method of a paraffin / polyurethane solid-solid composite double-phase change energy storage material, comprising the following steps: selecting raw materials which comprises the following components: by weight, 40-90 parts of polyethylene glycol, 4-20 parts of isocyanate, 0-10 parts of a chain extender, 0-50 parts of paraffin, 0-5 parts of a surfactant and 0-1 part of a catalyst; melting glycol and carrying out vacuum-pumping processing, mixing the molten glycol with the surfactant and paraffin, adding isocyanate, the chain extender and the catalyst to react at a temperature of 60-90 DEG C to obtain a performed polymer, carrying out deaeration on the performed polymer, injecting the deaerated performed polymer into a mould, solidifying, cooling and demoulding. According to the composite double-phase change energy storage material provided by the invention, a paraffin hydrocarbon compound with large latent heat of phase change is used as a filling material, and a polyurethane material with a phase change function is used as a matrix. Latent heat of phase change of the prepared paraffin / polyurethane solid-solid composite double-phase change energy storage material reaches 154J / g, phase-change temperature ranges from 15 DEG C to 70 DEG C, and the material is a composite phase change material having a double-phase change character.

Description

technical field [0001] The invention relates to a preparation method of a polymer solid-solid phase change energy storage material, in particular to a preparation method of a paraffin / polyurethane solid-solid composite dual phase change energy storage material. Background technique [0002] Energy is the basis for the survival and development of human beings, but there are often time and space mismatches between energy supplies, and many energy sources cannot be reasonably and fully utilized at present. Phase change energy storage material is a phase change (heat storage process) that absorbs heat when the temperature is higher than the phase transition point of the material. When the temperature drops below the phase transition point, a reverse phase change (exothermic process) occurs to release heat for energy storage. and temperature-regulating substances. Phase change energy storage materials have broad application prospects in solar energy storage, industrial waste hea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/48C08K5/01C09K5/14
Inventor 陈可平田春蓉余雪江王建华赵秀丽
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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