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Stearic acid/white carbon black solid-solid phase change material and chemical preparation method thereof

A technology of solid-solid phase change materials and stearic acid, which is applied in the direction of chemical instruments and methods, heat exchange materials, etc., can solve the unfavorable large-scale application and promotion of the preparation process, the difficulty of product dispersion, and the poor quality of solid-solid phase change materials Control and stability issues, to achieve the effect of excellent product application efficiency, easy closed cycle use, and easy control of synthesis speed

Active Publication Date: 2015-01-28
NANTONG JINLI OIL & FAT IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned physical mixing method is simple and convenient, but it is difficult to disperse the product, the quality of the solid-solid phase change material is not easy to control and stabilize, and the preparation process is not conducive to large-scale application and promotion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: For a product that requires sufficient phase transition performance, stable performance, and long life, chemical synthesis, PEG molecular weight of about 10,000, eutectic PEG, and PEG / PET ratio of about 95:5 can be selected. PEG / PET PCM. Its phase transition temperature is between 50 and 70°C. It is suitable for intermediate heat medium of air conditioning system, heat absorption pool of high-power electronic components, constant temperature facilities of electrical appliances, etc.

[0024] First, dry stearic acid and white carbon black at 100°C under vacuum for 1 hour, then stir 9.5Kg of dried stearic acid and 19.0Kg of acetone to form a solution, and then add 11.12g of toluene to the stearic acid solution- The mixture of 2,4 diisocyanate and 1.11g of dibutyltin maleate was pre-reacted at 120°C under stirring and reflux for 10 minutes. The entire reflux process and the chemical synthesis process adopt magnetic stirring, and the rotating speed of the magne...

Embodiment 2

[0027] Example 2: For products with good energy storage effect, stable performance and long service life, chemical synthesis, PEG with a molecular weight of about 10,000, eutectic PEG, and a ratio of PEG / PET of 90:10, 85 can be selected. PEG / PET PCM around :15, 80:20. Its phase transition temperature is between 40 and 60°C.

[0028] First, dry stearic acid and white carbon black at 100°C under vacuum for 1 hour, then stir 9.5Kg of dried stearic acid and 19.0Kg of acetone to form a solution, and then add 11.12g of toluene to the stearic acid solution- The mixture of 2,4 diisocyanate and 1.11g of dibutyltin maleate was pre-reacted at 120°C under stirring and reflux for 10 minutes. The entire reflux process and the chemical synthesis process adopt magnetic stirring, and the rotating speed of the magnetic stirring bar is 30 rpm.

[0029] Then add 0.5Kg of white carbon black, mix well and react at 190°C for 60min. After the reaction is complete, the mixture turns into a gel. Aft...

Embodiment 3

[0031] Example 3: For energy storage materials suitable for use at room temperature, it is necessary to select PEG / PET quality 40:60, 30:70, 25:75, 20:80, 15:85, etc. Produces co-crystal PEG, chemically synthesized PEG / PET PCM. Its phase transition temperature is between 27 and 30°C. Automatic temperature-adjusting clothing, bedding, automatic air-conditioning buildings, glass greenhouses, etc.

[0032] First, dry stearic acid and white carbon black at 100°C under vacuum for 1 hour, then stir 9.5Kg of dried stearic acid and 19.0Kg of acetone to form a solution, and then add 11.12g of toluene to the stearic acid solution- The mixture of 2,4 diisocyanate and 1.11g of dibutyltin maleate was pre-reacted at 120°C under stirring and reflux for 10 minutes. The entire reflux process and the chemical synthesis process adopt magnetic stirring, and the rotating speed of the magnetic stirring bar is 30 rpm.

[0033] Then add 0.5Kg of white carbon black, mix well and react at 190°C for ...

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Abstract

The invention discloses a catalytic synthesis method of a stearic acid / white carbon black solid-solid phase change material, belonging to the technical field of phase change thermal storage solid-solid phase change materials. According to the catalytic synthesis method disclosed by the invention, with stearic acid, white carbon black, toluene-2, 4-diisocyanate as raw materials, dibutyltin maleate as a catalyst and acetone as a solvent, the whole synthesis process and reaction speed are easy to control; while, with low boiling point, acetone as the solvent is easily used in a closing circulation mode; transformation enthalpy of the stearic acid / white carbon black solid-solid phase change material under the condition with the same material ratio is obviously increased, the yield of the phase change material is high, the quality of the phase change material is stable and reliable, and the comprehensive cost of the product is obviously lowered; in addition, process steps, instruments and equipment are simple, and implementation and production investments are little, so that the stearic acid / white carbon black solid-solid phase change material is easily industrially produced in a large scale and has good economic benefit.

Description

technical field [0001] The invention relates to a novel phase change thermal storage solid-solid phase change material, in particular to a stearic acid / white carbon black solid-solid phase change material and a chemical preparation method thereof, belonging to the technical field of catalytic synthesis of materials. Background technique [0002] The main advantage of solid-solid phase change materials is that there is no liquid state before and after the phase change; when the material phase changes, the heat capacity is dozens of times higher than that of water; regulation. Since there is no liquid state during the phase change process, no container is required. Compared with substances with phase change like water, it is easy to use, has small volume changes, and is easy to combine with other materials. It can be used as the matrix material of the system, especially for heat preservation. , The use of waterproof building materials. In foreign countries, such materials ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/02
CPCC09K5/02
Inventor 王艳秋张安然
Owner NANTONG JINLI OIL & FAT IND CO LTD
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