Preparation method of phase change material with palm oil as raw material

A technology of phase change material and palm oil, which is applied in the field of preparation of phase change material, can solve the problems of less practical application and popularization of phase change material, and achieves low expansion and shrinkage, good compatibility, and less supercooling and superheating phenomenon. Effect

Active Publication Date: 2016-09-07
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Domestic research on phase change energy storage materials is currently mainly biased towards material preparation in the laboratory stage. In terms of form solidification and heat transfer enhancement, the actual application and promotion of phase change materials in building envelopes is still relatively small.

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  • Preparation method of phase change material with palm oil as raw material
  • Preparation method of phase change material with palm oil as raw material

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preparation example Construction

[0020] A kind of preparation method of the phase-change material that takes palm oil as raw material, comprises the steps:

[0021] (1) Preparation of refined methyl ester: Add palm oil and methanol with a molar ratio of 1:2 to 1:5 in a reaction vessel, stir and heat to 50-75°C and add catalyst sodium methoxide to a final concentration of 0.6% by mass , after reacting for 5 to 15 minutes, take the methyl ester phase for the second transesterification reaction, add palm oil and methanol with a molar ratio of 1:1 to 1:5, and add the catalyst sodium methoxide at 50 to 75°C to a final concentration of mass percent 0.2-0.4%, after reacting for 15-30 minutes, add phosphoric acid solution to neutralize until neutral, stir, take the methyl ester phase, wash it, dry it, and obtain the refined methyl ester;

[0022] (2) Preparation of saturated fatty acid methyl ester: add urea and ethanol with a mass percentage of 95% in the reaction vessel, the mass ratio of urea and ethanol is 1:2 to...

Embodiment 1

[0026] A kind of preparation method of the phase-change material that takes palm oil as raw material, comprises the steps:

[0027] (1) Preparation of refined methyl ester: Add palm oil and methanol with a molar ratio of 1:2 in a three-necked flask, stir (100r / min) and heat to 50°C, add catalyst sodium methylate to a final concentration of 0.6% by mass, After reacting for 5 minutes, take the methyl ester phase for the second transesterification reaction, add palm oil and methanol at a molar ratio of 1:1, stir (100r / min), and add catalyst sodium methoxide at 50°C to a final concentration of 0.2% by mass , after reacting for 15 minutes, add phosphoric acid solution to neutralize to neutrality, stir, take the methyl ester phase, wash it, dry it, and obtain the refined methyl ester;

[0028] (2) Preparation of saturated fatty acid methyl ester: use urea inclusion separation method to separate refined methyl ester, add urea and 95% ethanol in a three-necked flask, the mass ratio of...

Embodiment 2

[0031] A kind of preparation method of the phase-change material that takes palm oil as raw material, comprises the steps:

[0032](1) Preparation of refined methyl ester: Add palm oil and methanol with a molar ratio of 1:3.5 in a three-necked flask, stir (100r / min), add catalyst sodium methylate to a final concentration of 0.6% by mass at 65°C, and react After 10 minutes, take the methyl ester phase for the second transesterification reaction, add palm oil and methanol with a molar ratio of 1:2, stir (100r / min), add the catalyst sodium methoxide at 65°C to a final concentration of 0.3% by mass, After reacting for 25 minutes, add phosphoric acid solution to neutralize until neutral, stir slowly for 5 minutes, remove the methyl ester phase, remove excess methanol, wash with saturated saline, dry over anhydrous sodium sulfate, and obtain the refined methyl ester;

[0033] (2) Preparation of saturated fatty acid methyl ester: use urea inclusion separation method to separate refin...

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Abstract

The invention discloses a preparation method of a phase change material with palm oil as a raw material. According to the invention, palm oil is adopted as a raw material, and methanol is added; after two transesterification reactions, refined methyl ester is obtained; the refined methyl ester is separated, such that saturated fatty acid methyl ester is obtained; the saturated fatty acid methyl ester is mixed with hexadecanol according to a mass ratio of 10:1-2.5:1, such that a binary composite phase change material with phase change temperature of 22-27 DEG C and phase change latent heat of 160-190J/g is obtained. According to the invention, the prepared binary phase change material is subjected to morphological curing either by encapsulating the material with microcapsules or by compounding the material with a porous medium substrate. The material can be combined with a building material to form a composite building envelop structure with an energy-saving property. Therefore, indoor temperature difference between day and night can be effectively reduced, thermal comfort can be improved, and energy consumption can be reduced.

Description

technical field [0001] The invention relates to the field of phase change materials, in particular to a preparation method of a phase change material using palm oil as a raw material. Background technique [0002] Due to its own energy storage characteristics, phase change materials have more advantages than ordinary thermal insulation materials. The use of phase change materials can greatly improve the thermal inertia of the wall, and its use is flexible and changeable, and the energy-saving effect is not affected by the wall. thermal bridge effect. At present, there are many related studies on phase change material composite building envelope, and some research results have been achieved in both the climate zone and the selection of phase change materials, but in the phase change material composite building envelope In terms of practical application and promotion, it is still quite lacking. The development of practical phase-change material composite enclosure structures...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C04B24/08
CPCC04B40/0039C04B2103/0071C09K5/06C04B24/08C04B24/026
Inventor 管海凤胡涛董凯军罗伟民
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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