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CN-122012028-A - Phase-change energy-saving wallboard and preparation method thereof

CN122012028ACN 122012028 ACN122012028 ACN 122012028ACN-122012028-A

Abstract

The invention relates to the technical field of building materials, and provides a phase-change energy-saving wallboard and a preparation method thereof. The phase-change energy-saving wallboard comprises an aluminum plate shell and a phase-change material filled in the aluminum plate shell, wherein the phase-change material comprises, by weight, 70-80 parts of paraffin, 12-24 parts of a composite filler and 1-2 parts of a stabilizer, and the composite filler comprises, by weight, 10-20 parts of a heat conducting material and 2-4 parts of polyethylene wax. Through the technical scheme, the problems of poor circulation stability and high recovery difficulty of the phase-change wallboard in the related technology are solved.

Inventors

  • YANG GUISHAN
  • HAN YUSHENG
  • ZHANG KELI

Assignees

  • 莱斯汀智能家居有限公司

Dates

Publication Date
20260512
Application Date
20251225

Claims (10)

  1. 1. The phase-change energy-saving wallboard is characterized by comprising an aluminum plate shell and a phase-change material filled in the aluminum plate shell, wherein the phase-change material comprises, by weight, 70-80 parts of paraffin, 12-24 parts of composite filler and 1-2 parts of stabilizer; The composite filler comprises, by weight, 10-20 parts of a heat conducting material and 2-4 parts of polyethylene wax.
  2. 2. The phase-change energy-saving wallboard of claim 1, wherein the mass ratio of the polyethylene wax to the heat-conducting material is 1:5-10.
  3. 3. The phase-change energy-saving wallboard of claim 1, wherein the method for preparing the composite filler comprises the following steps: and dissolving polyethylene wax in toluene to obtain a mixed solution, dispersing a heat conducting material in the mixed solution, stirring, freeze-drying and crushing to obtain the composite filler.
  4. 4. A phase change energy saving wallboard according to claim 3, wherein the dissolution temperature is 90-100 ℃.
  5. 5. A phase change energy saving wallboard according to claim 3, wherein the concentration of polyethylene wax in the mixed solution is 10wt% to 20wt%.
  6. 6. A phase change energy saving wallboard according to claim 2, wherein the thermally conductive material comprises boron nitride whiskers and/or titanium diboride.
  7. 7. The phase-change energy-saving wallboard of claim 6, wherein when the heat conducting material is titanium diboride and boron nitride whisker, the mass ratio of the titanium diboride and the boron nitride whisker is 1:3-5.
  8. 8. A phase change energy saving wallboard according to claim 1, wherein the stabilizer comprises an anionic surfactant.
  9. 9. The phase-change energy-saving wallboard of claim 8, wherein the anionic surfactant comprises one or two of sodium dodecyl benzene sulfonate, sodium dodecyl sulfonate and sodium fatty alcohol polyoxyethylene ether sulfate.
  10. 10. A method for preparing a phase-change energy-saving wallboard, which is used for preparing the phase-change energy-saving wallboard as claimed in any one of claims 1 to 9, and is characterized by comprising the following steps: and after paraffin is melted, adding a composite filler and a stabilizer, stirring to obtain a phase-change material, pouring the phase-change material into the aluminum plate shell, and sealing to obtain the phase-change energy-saving wallboard.

Description

Phase-change energy-saving wallboard and preparation method thereof Technical Field The invention relates to the technical field of building materials, in particular to a phase-change energy-saving wallboard and a preparation method thereof. Background In the field of building energy conservation, the phase change material is widely applied to building enclosures such as wallboards by virtue of the characteristic that the phase change material can absorb or release a large amount of latent heat in the phase change process, so that the passive regulation of indoor temperature is realized, and the building energy consumption is reduced. At present, the common phase-change wallboard mostly uses organic phase-change materials such as paraffin and the like as cores, but has lower heat conductivity coefficient, so that the heat exchange rate is slow, the temperature regulation response is lagged, and the indoor and outdoor temperature change is difficult to adapt quickly. In order to improve the heat conducting performance, in the related art, aluminum powder, graphite powder and other heat conducting materials are often directly added into paraffin, but the heat conducting materials are easy to agglomerate and settle in liquid paraffin, and cannot form a uniform heat conducting network, so that the stability of long-term use is affected. In addition, the recycling difficulty of the existing phase-change energy-saving wallboard is high, and when the wallboard is abandoned or renovated, the phase-change material and the base material are difficult to separate efficiently, so that not only is the resource wasted, but also a large amount of solid waste is generated. Therefore, a phase-change energy-saving wallboard with good cycle stability and convenient resource recovery is needed. Disclosure of Invention The invention provides a phase-change energy-saving wallboard and a preparation method thereof, which solve the problems of poor circulation stability and high recovery difficulty of the phase-change wallboard in the related art. The technical scheme of the invention is as follows: the invention provides a phase-change energy-saving wallboard which comprises an aluminum plate shell and a phase-change material filled in the aluminum plate shell, wherein the phase-change material comprises, by weight, 70-80 parts of paraffin, 12-24 parts of a composite filler and 1-2 parts of a stabilizer; The composite filler comprises, by weight, 10-20 parts of a heat conducting material and 2-4 parts of polyethylene wax. In the invention, the phase change material filled in the aluminum plate shell is a phase change material filled in the aluminum plate shell, wherein the volume of the cavity in the aluminum plate shell is 80% -90%; In the preparation of the phase-change energy-saving wallboard, the heat performance of the phase-change energy-saving wallboard is improved by adding the heat conducting material, the heat transfer speed between the paraffin phase-change material and the external environment is accelerated, the wallboard can respond rapidly when the temperature changes, and the efficiency of phase-change energy storage and temperature control is improved. As a further technical scheme, the preparation method of the composite filler comprises the following steps: And dissolving polyethylene wax in toluene to obtain a mixed solution, dispersing a heat conducting material in the mixed solution, stirring, freeze-drying and crushing to obtain the composite filler. As a further technical scheme, the dissolution temperature is 90-100 ℃. As a further technical scheme, the concentration of the polyethylene wax in the mixed solution is 10-20 wt%. As a further technical scheme, the particle size of the composite filler is 6-8 mu m. As a further technical scheme, the particle size of the composite filler is 6 μm. As a further technical scheme, the mass ratio of the polyethylene wax to the heat conducting material is 1:5-10. As a further technical scheme, the heat conducting material comprises one or two of boron nitride whiskers and titanium diboride. As a further technical scheme, when the heat conducting material is titanium diboride and boron nitride whisker, the mass ratio of the titanium diboride to the boron nitride whisker is 1:3-5. In the preparation of the phase-change energy-saving wallboard, the boron nitride whisker and titanium diboride are used as heat conduction materials, the boron nitride whisker and the titanium diboride are matched, the boron nitride whisker is interwoven to form a three-dimensional network skeleton, and the titanium diboride fills the grid gaps to construct a three-dimensional heat conduction network, so that the circulation stability of the prepared phase-change material is improved. And the mass ratio of titanium diboride to boron nitride whisker is regulated to be 1:3-5, so that the cycling stability of the prepared phase change material is further improved. As a further embodiment, the s