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Poly fatty acid shape-stabilized phase change material and preparation method thereof

A technology of shape-setting phase change materials and polybasic fatty acids, which is applied in the production of ceramic materials, materials for heat exchange, chemical instruments and methods, etc. , the effect of increasing the adsorption capacity and improving the energy saving efficiency

Inactive Publication Date: 2012-07-04
SHANDONG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

The phase transition point of the composite phase change material is relatively high, especially when the dibasic fatty acid eutectic system is prepared with lauric acid and myristic acid, the phase transition temperature of the final composite phase change material is as high as 36°C, making the dibasic fatty acid / soap The application of soil composite phase change materials is limited

Method used

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  • Poly fatty acid shape-stabilized phase change material and preparation method thereof
  • Poly fatty acid shape-stabilized phase change material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] (1) According to Schroeder's formula, the optimal mixing mass ratio of myristic acid and stearic acid is calculated to be 72.66%: 27.34%, and myristic acid and stearic acid are mixed according to the proportion, and the two are mixed under the condition of 85 ℃ of water baths. The fatty acid mixture was heated and stirred for 50 minutes, and myristic acid / stearic acid binary eutectic mixture was obtained after ultrasonication for 3 minutes.

[0038] (2) Measure the binary eutectic mixture of myristic acid / stearic acid by differential scanning calorimetry, the phase transition temperature is 47.55°C, the phase transition latent heat is 182.3J / g, and its theoretical molecular mass is calculated to be 241.39; The dibasic fatty acid eutectic mixture is regarded as a single fatty acid, and then compounded with lauric acid. According to Schroeder's formula, the optimum mixing mass ratio of dibasic fatty acid eutectic mixture and lauric acid is 49% / 51%. ; After mixing accordin...

Embodiment 2

[0041] (1) Calculate the mixing mass ratio of lauric acid and myristic acid according to Schroeder's formula to be 65.08%: 34.92%, mix lauric acid and myristic acid according to the proportion, and mix the mixture of these two fatty acids under 65°C water bath condition Heated and stirred for 60 minutes, and ultrasonicated for 2 minutes to obtain a binary eutectic mixture of lauric acid / myristic acid.

[0042] (2) Measure the binary eutectic mixture of lauric acid / myristic acid by differential scanning calorimetry, the phase transition temperature is 35.10°C, the latent heat of phase transition is 210.2J / g, and its theoretical molecular mass is calculated to be 209.30; The dibasic fatty acid eutectic mixture is regarded as a single fatty acid, and then compounded with capric acid. According to Schroeder's formula, the optimal mixing mass ratio of dibasic fatty acid eutectic mixture and capric acid is 47.6% / 52.4% ; After mixing according to the ratio, heat and stir it in a wate...

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Abstract

The invention provides a poly fatty acid shape-stabilized phase change material and a preparation method thereof. The shape-stabilized phase change material is composited with the following raw materials: 30-60% of poly fatty acid eutectic mixture and 40-70% of mud ceramsite. The preparation method comprises the following steps: vaccumizing the mud ceramsite for 30-100 minutes at a temperature higher than the phase change point of the poly fatty acid eutectic mixture, and adding melted poly fatty acid; increasing the pressure to the normal pressure to allow the liquid poly fatty acid to gradually permeate into the mud ceramsite, and cooling to obtain the poly fatty acid / mud ceramsite shape-stabilized phase change material. The preparation method is simple, and the obtained phase change material has relatively low phase change temperature, and is suitable for room temperature conditioning of civil buildings.

Description

technical field [0001] The invention relates to a polybasic fatty acid shape-fixed phase-change material and a preparation method thereof, belonging to the field of building energy-saving and heat storage materials. Background technique [0002] As the world's energy crisis intensifies, people pay more and more attention to the efficient use of energy. A phase change material is a substance that can change its physical state and absorb or release a large amount of energy within a certain temperature range. For example, a solid-liquid phase change material, when the ambient temperature is higher than its phase transition temperature, it will change from solid to liquid, while absorbing and storing a large amount of latent heat; and when the ambient temperature drops again, the phase change material will change from liquid reverse phase transition to solid state, and release the stored heat to the environment again. When the physical state changes repeatedly in this way, the...

Claims

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Application Information

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IPC IPC(8): C04B33/132C04B14/02C09K5/06
CPCY02P40/60
Inventor 王俊鹏何红桃岳钦艳叶新强高悦高宝玉高桂波
Owner SHANDONG UNIV
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