Phase separation preventing gel low-temperature phase-change material and preparation method thereof

A low-temperature phase change and phase separation technology, applied in the field of phase change energy storage, can solve the problems of supercooling, low latent heat of phase change, poor stability, etc., and achieve the effect of reducing the degree of phase separation, low cost and good stability

Inactive Publication Date: 2017-05-31
SUZHOU ANTEK INDAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As an energy storage body, phase change materials can better solve the problem of energy shortage, so phase change materials are widely used in various industries, but the current phase change materials generally have supercooling and phase separation phenomena, and poor stability. low latent heat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The invention proposes a phase-separation-preventing gel low-temperature phase-change material, comprising the following components in parts by weight: 1 part of cellulose-based superabsorbent resin gel substrate, 90 parts of main energy storage agent, and 1 part of nucleating agent share.

[0022] Wherein the main energy storage agent is magnesium chloride solution with a mass concentration of 5%, and the nucleating agent is barium fluoride.

[0023] A method for preparing a phase-separation-resistant gel low-temperature phase-change material, the specific steps of which are as follows:

[0024] ① Cellulose preparation: chop bamboo pulp fibers, dry to constant weight, and set aside;

[0025] ②Activation of cellulose: Weigh 3g of bamboo pulp fiber, add 100mL of sodium hydroxide aqueous solution and urea aqueous solution with a mass concentration ratio of 11%:11% for activation, then put it into a constant temperature box with a temperature of 20°C, soak for 2 Hours la...

Embodiment 2

[0030] A kind of anti-phase separation gel low-temperature phase change material proposed by the present invention comprises the following components in parts by weight: 2 parts of cellulose-based superabsorbent resin gel base material, 93 parts of main energy storage agent, and 2 parts of nucleating agent share.

[0031] Wherein the main energy storage agent is sodium chloride solution with a mass concentration of 13%, and the nucleating agent is pumice powder.

[0032] A method for preparing a phase-separation-resistant gel low-temperature phase-change material, the specific steps of which are as follows:

[0033] ① Cellulose preparation: chop bamboo pulp fibers, dry to constant weight, and set aside;

[0034] ②Activation of cellulose: Weigh 3g of bamboo pulp fiber, add 100mL of sodium hydroxide aqueous solution and urea aqueous solution with a mass concentration ratio of 11%:11% for activation, then put it into a constant temperature box with a temperature of 20°C, soak fo...

Embodiment 3

[0039] A low-temperature phase-change material for anti-phase separation gel proposed by the present invention comprises the following components in parts by weight: 2 parts of cellulose-based superabsorbent resin gel substrate, 90 parts of main energy storage agent, and 3 parts of nucleating agent share.

[0040] The main energy storage agent is a mixture of magnesium chloride solution with a mass concentration of 13% and a sodium chloride solution with a concentration of 5%, and the nucleating agent is diatomite.

[0041] A method for preparing a phase-separation-resistant gel low-temperature phase-change material, the specific steps of which are as follows:

[0042] ① Cellulose preparation: chop bamboo pulp fibers, dry to constant weight, and set aside;

[0043] ②Activation of cellulose: Weigh 3g of bamboo pulp fiber, add 100mL of sodium hydroxide aqueous solution and urea aqueous solution with a mass concentration ratio of 11%:11% for activation, then put it into a consta...

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Abstract

The invention discloses a phase separation preventing gel low-temperature phase-change material which comprises the following components in parts by weight: 1-5 parts of a cellulose system high water-absorbent resin gel base material, 90-98 parts of a main energy storage agent and 1-5 parts of a nucleating agent. According to the phase-change material disclosed by the invention, the cellulose system high water-absorbent resin gel base material with a thickening effect which is prepared by grafting cellulose with acrylamide is used in the phase-change material, so that the phase separation phenomenon of the phase-change material can be improved; the phase-change material is wide in raw material source, low in cost, free of toxin or smell, safe and reliable, good in stability, easy in biodegradability and can be popularized and used in cold chain transportation; the adjustable temperature range of the phase-change material is minus 15 DEG C to minus 25 DEG C, and the phase-change latent heat of the phase-change material is 130-180J / g.

Description

technical field [0001] The invention relates to the field of phase-change energy storage, which is an intersecting field of material science and energy science, and in particular relates to a phase-separation-proof gel low-temperature phase-change material and a preparation method thereof. Background technique [0002] In recent years, with the increase of people's awareness of environmental protection, the shortage of energy and the problem of environmental pollution in the process of energy use have led to the urgent development and use of new energy sources, such as intermittent clean energy such as solar energy and wind energy. Moreover, in order to overcome the serious phenomenon of peak-to-valley difference in power load, our country has implemented a power price policy to encourage the public and industry to use low-valley power and finally achieve the purpose of "moving peaks and filling valleys". As an energy storage body, phase change cold storage materials can sto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063Y02E60/14
Inventor 丘晓琳包伟强
Owner SUZHOU ANTEK INDAL
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