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Material for storing heat and supplying heat for building generated shaped phase change by heating and its preparation method

A technology of shape-setting phase change and heat storage materials, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of high phase change temperature, no temperature range, and preparation methods that cannot be mass-produced

Inactive Publication Date: 2003-12-24
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shape-setting phase-change materials reported in the prior art do not have the temperature range required by this patent. Therefore, due to the high phase-change temperature, they are not suitable for building electricity and solar heating. Secondly, the paraffin wax will ooze out to varying degrees after the material is heated. And the preparation method of the material cannot be used for mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 11

[0030] Embodiment 11. 5 grams of calcium carbonate are added in 10 milliliters of 10% sodium stearate aqueous solution, after ultrasonic dispersion 30 minutes, after drying at 80 ℃, grind, obtain activated calcium carbonate powder. 2. get 5 grams of the calcium carbonate powder of gained in 1, be 18-23 paraffin, 30 gram low-density polyethylenes, 5 gram styrene-butadiene-styrene copolymers (SBS) mix with 60 gram carbon number, Put it into an ultra-high-speed pulverizer and mix at high speed for 5 minutes, take out the mixture, and let it stand for 24 hours. 3. Put the obtained mixture into a screw extruder for extrusion, and the extrusion temperature is 130°C. 4. Put the melt obtained in 3 into the mold, and use a flat press to press at 130°C for molding. 5. Coat the plate obtained in 4 with a layer of polyethylene composite film, put it into the mold again, and take it out after hot-pressing and sealing with a flat press. In this way, the required electric heating and shape...

Embodiment 21

[0031] Embodiment 21. 5 grams of calcium carbonate are added in 10 milliliters of 10% sodium stearate aqueous solution, after ultrasonic dispersion 30 minutes, after drying at 80 ℃, grind, obtain activated calcium carbonate powder. 2. Get 5 grams of the calcium carbonate powder obtained in 1, mix it with 80 grams of paraffin wax with a carbon number of 18-23, and 15 grams of SBS, put it into an ultra-high-speed pulverizer and mix it at high speed for 5 minutes, take out the mixture, and leave it for 24 hours. 3. Put the obtained mixture into a screw extruder for extrusion, and the extrusion temperature is 130°C. 4. Put the melt obtained in 3 into the mold, and use a flat press to press at 130°C for molding. 5. Coat the plate obtained in 4 with a layer of polyethylene composite film, put it into the mold again, and take it out after hot-pressing and sealing with a flat press. In this way, the required electric heating and shape-changing heat storage floor can be obtained. The...

Embodiment 31

[0032] Example 31. 60 grams of paraffin wax with a carbon number of 18-23, a mixture of 25 grams of high-density polyethylene, linear low-density polyethylene and polypropylene, and a mixture of 15 grams of SBS and hydrogenated SBS were mixed and put into an ultra-high-speed pulverizer Mix on medium-high speed for 5 minutes, remove the mixture, and let it sit for 24 hours. 2. Put the obtained mixture into a screw extruder for extrusion, and the extrusion temperature is 150°C. 3. Put the melt obtained in 3 into the mold, and use a flat press to press at 130°C for molding. 4. Coat the plate obtained in 4 with a layer of polyethylene composite film, put it into the mold again, and take it out after hot-pressing and sealing with a flat press. In this way, the required electric heating and shape-changing heat storage floor can be obtained. The melting curve peak temperature of the material measured by DSC (differential scanning calorimeter) is 35.2° C., and the heat of phase chan...

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Abstract

An electrically-heated shape-fixed phase-change heat-accumulating material for heating indoor air is prepared from paraffin wax, polyolefin, thermoplastic elastomer and inorganic filler and has the 30-40 deg.C of phase change temp. The solar one is prepared from the paraffin wax whose number of carbon atoms is 16-20, polyolefin, thermoplastic elastomer and inorganic filler and has the 17-25 deg.Cof phase change temp. Their preparing process is also disclosed.

Description

Technical field: [0001] A heating-setting phase-change thermal storage material for building heating and a preparation method thereof belong to the technical field of phase-change materials for building. Background technique: [0002] At present, building heating is mainly based on coal, which not only has low heat utilization efficiency, but also causes serious air pollution. Therefore, natural gas heating and electric heating are gradually replacing coal-fired heating. Natural gas heating is convenient, but expensive. Electric heating (such as electric heating) has caused serious peak and valley phenomena in electricity consumption due to the concentrated use time of users. The power supply is tight during the peak period of electricity consumption, and a large number of power resources are idle during the low period of electricity consumption. For this reason, many large and medium-sized cities are gradually implementing the principle of separate pricing for power grid...

Claims

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Application Information

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IPC IPC(8): C09K5/06
Inventor 杨睿张寅平李贺
Owner TSINGHUA UNIV
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