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Sodium acetate trihydrate phase change heat storage material and preparation method thereof

A phase-change heat storage material, sodium acetate trihydrate technology, applied in the field of energy storage materials, can solve the problems of large crystallization supercooling, achieve the effects of improving thermal conductivity, improving heat storage/dissipating efficiency, and reducing supercooling

Inactive Publication Date: 2021-08-10
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, no nucleating agent is used in the composite phase change material, and the phenomenon of relatively large crystallization supercooling may occur during the storage / release heat cycle of the sodium acetate trihydrate composite phase change material (Li Wenchen, Cai Yifan, Yan Taisen, etc. Sodium acetate trihydrate / Preparation and heat storage performance of expanded graphite composite phase change materials [J]. Journal of Shanghai Jiaotong University, 2020, v.54; No.416(10):13-21.)

Method used

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  • Sodium acetate trihydrate phase change heat storage material and preparation method thereof
  • Sodium acetate trihydrate phase change heat storage material and preparation method thereof
  • Sodium acetate trihydrate phase change heat storage material and preparation method thereof

Examples

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Embodiment 1

[0024] Sodium three aquatic acetate phase change heat storage material consists of 95% sodium three aquatic acetate, 2% diq. Sodium hydrogen phosphate, 2% and 1% expansion graphite, and the preparation method is as follows:

[0025] (1) Prepare the expansion graphite in the high temperature furnace of 900 ° C;

[0026] (2) Mix sodium three aquatic acetate 10g and diethodium hydrogen phosphate sodium hydrogen phosphate is mixed into the sample bottle, and the sample bottle is placed in a water bath in 75 ° C, the sample is melted after 10 min;

[0027] (3) Sample bottle is placed in a water bath in 75 ° C, while stirring, 0.21 g of carboxymethylcellulose is slowly added, and stirring is continued for 15 min;

[0028] (4) Sample bottle is placed in a water bath in 75 ° C, while stirring, 0.105 g of expanded graphite is added, and stirred for 20 min, sodium three aquatic acetate, dihydrate sodium hydrogen phosphate, carboxymethylcellulose and expansion The graphite is mixed and unifo...

Embodiment 2

[0031] The present embodiment is substantially the same as that of Example 1, and the different sodium three aquatic acetate phase change heat storage material is 93.5%, dihydrate 2%, 2% sodium hydrogen phosphate, 2%, carboxymethyl cellulose, and expanded graphite. 2.5% consist. The expansion graphite is 0.267 g in step (4).

Embodiment 3

[0033] The present embodiment is substantially the same as that of Example 1, and the different sodium three aquatic acetate phase change heat storage material is 96% sodium three aquatic acetate, 1% sodium hydrogen phosphate is 1%, carboxymethylcellulose 2% and expansion. Graphite is 1% consisting. In step (2), there is 0.21 g of carboxymethyl cellulose in step (3) in step (3), and the graphite is expanded from 0.104 g.

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Abstract

The invention discloses a sodium acetate trihydrate phase change heat storage material and a preparation method thereof. The sodium acetate trihydrate phase change heat storage material comprises the following components in percentage by mass: 93.5-96% of sodium acetate trihydrate, 1-2% of disodium hydrogen phosphate dodecahydrate, 1-3% of carboxymethylcellulose and 1-2.5% of expanded graphite. According to the invention, sodium acetate trihydrate is taken as a main body material, carboxymethyl cellulose is taken as a thickening agent, disodium hydrogen phosphate dodecahydrate is taken as a nucleating agent, expanded graphite is taken as a heat-conducting filler, and phase separation of sodium acetate trihydrate is inhibited by regulating and controlling the proportions of the components, so that the supercooling degree of the material is effectively reduced, the stability is good, phase separation is avoided, and the material has high latent heat and heat conductivity coefficient.

Description

Technical field [0001] The present invention belongs to the technical field of energy storage materials, and is relate to a three-water acetate phase change heat storage material and a preparation method thereof. Background technique [0002] Electronic equipment thermal control is a technique for maintaining the operating temperature of electronic devices in normal temperature range, which is important for ensuring the reliability of electronic equipment. For short-term high-power, electronic devices that use traditional air cooling, liquid-cooled heat-cooling methods, generally need to be reduced according to the maximum heat dissipation power of electronic devices, which will cause a large redundancy in the heat sink and the heat dissipation system is complicated. [0003] If the phase change heat storage technology is applied to the thermal control of the short-time high-power intermittent operation, when the electronic device is operated in high power, the temperature increa...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 方海著李强胡定华
Owner NANJING UNIV OF SCI & TECH
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