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Mineral wax composite shape-setting phase-change material and process for preparation

A technology of shape-setting phase-change materials and paraffins, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of shape-setting phase-change materials not having performance and not being used, and achieve a simple and easy method with stable performance Effect

Inactive Publication Date: 2006-08-16
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reported shape-setting phase change materials do not have the performance required by the present invention to be used in a clear water environment at 38-50°C; the present invention does not adopt the preparation method of blending with an open mill and an extruder that is often used in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Mix high-density polyethylene, vinyltriethoxysilane (A151), dibutyltin dilaurate, dicumyl peroxide (DCP), and antioxidant 1010 in a mass ratio of 100:2.5:0.1:0.2:0.1 , extruder blending granulation to obtain cross-linked high-density polyethylene. Take 80g of paraffin-type alkanes with a melting point of 44°C and a latent heat of phase transition of 252.3kJ / kg and heat and melt them. When the temperature of the liquid wax reaches 160°C, put 15g of cross-linked high-density polyethylene and 5g of SBS into it, and stir until The two are completely dissolved, and then 5g of expanded graphite is added and stirred evenly. The mixture is taken out and put into a hot mold of 150×150×10 mm, and the temperature of the mold is 120° C. It is formed by pressing with a pressure of 200kPa, and after natural cooling, it is taken out from the mold to obtain a plate-shaped shape-fixed phase-change material. Using a Pyris Diamond differential scanning calorimeter from a US PE company, ...

Embodiment 2

[0015] Mix high-density polyethylene, vinyltriethoxysilane (A151), dibutyltin dilaurate, dicumyl peroxide (DCP), and antioxidant 1010 in a mass ratio of 100:2.5:0.05:0.1:0.1 , extruder blending granulation to obtain cross-linked high-density polyethylene. Take 70g of sliced ​​paraffin wax with a melting point of 48-50°C and a latent heat of phase transition of 134.3kJ / kg and heat it to melt. When the temperature of the liquid wax reaches 180°C, put 10g of cross-linked high-density polyethylene and 15g of SBS into it, and stir until two or completely dissolved, and then 5g of expanded graphite was added and stirred evenly. The mixture is taken out and put into a hot mold of 150×150×10 mm, and the temperature of the mold is 120° C. Press and form with a pressure of 300 Pa, and after natural cooling, take it out from the mold to obtain a plate-shaped shape-fixed phase-change material. The peak value of the melting curve of the material measured by the Pyris Diamond differential...

Embodiment 3

[0017] Mix high-density polyethylene, vinyltriethoxysilane (A151), dibutyltin dilaurate, dicumyl peroxide (DCP), and antioxidant 1010 in a mass ratio of 100:2.5:0.05:0.1:0.1 , extruder blending granulation to obtain cross-linked high-density polyethylene. Take 70g of sliced ​​paraffin wax with a melting point of 48-50°C and a latent heat of phase transition of 136.5kJ / kg and heat it to melt. When the temperature of the liquid wax reaches 150°C, put 12g of cross-linked high-density polyethylene and 12g of SBS into it, and stir until the two are completely Dissolve, then add 6g of expanded graphite and stir evenly. The mixture is taken out and put into a hot mold of 150×150×10 mm, and the temperature of the mold is 120° C. It is formed by pressing with a pressure of 250kPa, and after natural cooling, it is taken out from the mold to obtain a plate-shaped shape-fixed phase-change material. The peak value of the melting curve of the material measured by the Pyris Diamond differe...

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Abstract

The invention provides a mineral wax composite shape-setting phase-change material and process for preparation, wherein the material comprises 70-80 wt% paraffin wax substance with 44-50 deg. C melting point, 4-15% of cross bond high-density polyethylene, 4-15 wt% of styrene / ethane-butylene / styrene copolymer (SEBS), and 4-6 wt% of expanded graphite.

Description

technical field [0001] The invention relates to a kind of paraffin substance as the main heat storage agent, cross-linked high-density polyethylene (HDPE), styrene-butadiene-styrene triblock copolymer (SBS), and expanded graphite as the encapsulating support Shape-setting phase change material and preparation method. Background technique [0002] Phase-change heat storage materials (PCM) have broad application prospects in many fields such as building heating, air-conditioning energy saving, and solar energy utilization. Solid-liquid phase change materials are the most researched and applied. In practical applications, traditional solid-liquid phase change energy storage materials need to be packaged in containers, which increases the thermal resistance between the phase change material and the external heat transfer medium during heat transfer, reduces the heat transfer efficiency, and increases the cost. In recent years, some scientific researchers have used some methods ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06
Inventor 焦庆影李玉红夏定国李玉蓉
Owner BEIJING UNIV OF TECH
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