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A flame retardant type organic phase-change material and a preparing 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 promoting large-scale use, increasing toughness, 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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  • A flame retardant type organic phase-change material and a preparing method thereof
  • A flame retardant type organic phase-change material and a preparing method thereof
  • A flame retardant type organic phase-change material and a preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[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 Ethoxysilphosphoramide.

[0037]Take 10g of paraffin wax whose phase transition temperature and phase transition latent heat value are 58°C and 165kJ / kg respectively, and 50g of petroleum ether (boiling range is 50°C to 90°C) and mix evenly to obtain a uniformly mixed suspension. Take another glass beaker, add 10 g of triethoxysilylphosphoramide and 1...

Embodiment 2

[0040] The synthetic method of triethoxysilylphosphoramide is the same as in Example 1.

[0041] In Example 1, the quality of triethoxysilylphosphoramide and absolute ethanol was increased to 20g and 200g respectively, the addition of deionized water and ammonia water was adjusted to 40g and 80g respectively, and other operating methods and material compositions remained unchanged. A flame-retardant organic phase-change material B was obtained.

Embodiment 3

[0043] The synthetic method of triethoxysilylphosphoramide is the same as in Example 1.

[0044] In Example 1, the temperature of the water bath was kept at 75° C., and the solution containing silicon dioxide was added dropwise to the above mixed solution. Other operating methods and material compositions remained unchanged to obtain a flame-retardant organic phase change material C.

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Abstract

A flame retardant type organic phase-change material and a preparing method thereof are disclosed. A preparing process of the flame retardant type organic phase-change material includes: mixing uniformly triethoxysilane phosphamide and lower alcohol, adding the mixture dropwise into a mixture of an organic phase-change material and an organic solvent, adding aqueous ammonia, stirring uniformly, mixing with a silicon dioxide precursor, cooling, performing rotary evaporation, washing and drying in vacuum to obtain the flame retardant type organic phase-change material. The flame retardant type organic phase-change material obtained by the method is high in mechanical strength, good in compatibility, high in flame retardance, high in heat conductivity coefficient, and long in using period.

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
CPCC09K5/066C09K21/12
Inventor 赵亮马蕊英方向晨王刚
Owner CHINA PETROLEUM & CHEM CORP
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