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Flame-retardant organic phase-change material and preparation method thereof

An organic phase, flame-retardant technology, applied in the field of flame-retardant organic phase change materials and their preparation, can solve the problems affecting the application effect of phase change energy storage materials, poor heat transfer effect of paraffin wax, and limited flame retardant effect, etc. Achieve the effects of increasing toughness, flame retardant and smoke suppression, and preventing shedding

Inactive Publication Date: 2015-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method prepares microcapsules, and since silicon dioxide is used as the capsule wall material, it has a certain flame-retardant effect, and can prevent the loss and leakage of core material paraffin; however, silicon dioxide is a high-heat-capacity flame-retardant material. Relying on its limited flame retardant effect, and the poor heat transfer effect of paraffin encapsulated in the shell, it seriously affects its application effect as a phase change energy storage material
In addition, the paraffin energy storage material encapsulated by it has poor compatibility with the organic matrix, and the silica is relatively brittle, that is, the toughness is insufficient, and it is easy to crack after long-term use

Method used

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  • Flame-retardant organic phase-change material and preparation method thereof
  • Flame-retardant organic phase-change material and preparation method thereof
  • Flame-retardant organic phase-change material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Multi-walled carbon nanotubes with an inner diameter of 5 nm and a length of 30 μm were selected, and the carbon nanotube tube ends were organically modified to prepare multi-walled carbon nanotubes containing -COOH groups. The -COOH group accounted for 3% of the mass of the nanotubes.

[0036]Mix absolute ethanol and triethoxysilane monomer with a mass ratio of 8:1, and add glacial acetic acid, wherein the mass ratio of the added amount of glacial acetic acid to the added amount of triethoxysilane is 1:1. Then add water dropwise under stirring at 50°C, wherein the mass ratio of water to triethoxysilane is 0.5:1, and stir until the reactant is in the form of a sol. Then add polyphosphoramide (molecular weight: 2500) to the system, the mass ratio of polyphosphoramide to triethoxysilane is 1:1, stir vigorously until the dispersion is uniform, and then dry the mixture at 100°C for 4 hours to obtain triethoxysilane Ethoxysilylphosphoramide.

[0037] Take 0.5g of organical...

Embodiment 2

[0040] The synthesis method of organically modified carbon nanotubes is the same as in Example 1.

[0041] The synthetic method of triethoxysilylphosphoramide is the same as in Example 1.

[0042] In Example 1, 1 g of organically modified carbon nanotubes and 100 g of petroleum ether (boiling range of 50°C to 90°C) were uniformly mixed, and other operating methods and material compositions remained unchanged to obtain a flame-retardant organic phase change material B .

Embodiment 3

[0044] The synthesis method of organically modified carbon nanotubes is the same as in Example 1.

[0045] The synthetic method of triethoxysilylphosphoramide is the same as in Example 1.

[0046] In Example 1, the quality of triethoxysilylphosphoramide and absolute ethanol was increased to 20g and 200g respectively, the amount of deionized water and ammonia water was adjusted to 40g and 80g respectively, and the mass percentage of silicon dioxide was weighed It is 2g of 30% silica sol, mixed with 40g of deionized water, and other operation methods and material composition remain unchanged to obtain flame-retardant organic phase change material C.

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Abstract

The invention discloses a flame-retardant organic phase-change material and a preparation method thereof. The preparation method of the flame-retardant organic phase-change material comprises the following steps: triethoxysilyl phosphamide is well mixed with lower alcohol; the mixture is added into a mixture of carbon nano-tubes, an organic phase-change material and an organic solvent drop by drop; ammonia water is added; the mixture is well mixed by stirring; and cooling, rotary evaporation, washing, and vacuum drying are carried out, such that the flame-retardant organic phase-change material is obtained. With the method, the obtained flame-retardant organic phase-change material has the advantages of good compatibility, high flame retardant performance, high thermal conductivity coefficient and relatively long service life.

Description

technical field [0001] The invention relates to the technical field of organic phase-change materials, in particular to a flame-retardant organic phase-change material and a preparation method thereof. Background technique [0002] Phase change materials (Phase change materials, PCMs) can absorb the heat of the environment when the phase changes, and release heat when needed, so as to achieve the purpose of controlling the temperature of the surrounding environment. As an energy storage carrier, phase change materials can alleviate the problem of energy shortage, and have been widely used in air-conditioning cold storage, automatic constant temperature of intelligent buildings, and energy storage and exchange technology for solar energy applications. And other fields also have potential application prospects and markets. [0003] Paraffin is an organic phase change material with excellent properties. It has high latent heat value, good chemical stability, and almost no supe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C09K21/12
CPCC09K5/063C09K21/12
Inventor 赵亮方向晨王刚
Owner CHINA PETROLEUM & CHEM CORP
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