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Cement composite shape-stabilized phase change material mortar, preparation method and application thereof

A technology for shape-setting phase change materials and cement, which is applied in the field of building materials, can solve the problems of lack of preparation methods and the use environment of shape-setting phase change materials, and achieves the effect of reducing cost and improving thermal conductivity.

Active Publication Date: 2016-01-27
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 use environment required by this patent; the existing technology often uses open mill and extruder blending, and does not have the preparation method adopted by this patent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Pre-cut the shaped phase change material into cubes of about 20x15x10mm, put it into the crushing device and undergo physical crushing for 10-15 seconds, break it into granular materials with an equivalent diameter of less than 2mm and take it out to obtain the modified shaped phase change material. Usually, after the shape-setting phase change material is processed in the reactor, it is quickly cooled from a high-temperature viscous slurry to a block shape, which has strong hydrophobicity; Influenced by characteristics, its thermal conductivity is relatively poor, and its thermal conductivity is about 0.2W / (m·℃).

[0022] Processing the bulk shape-shaped phase change material into particles with an equivalent diameter of less than 2mm not only changes the geometric shape of the material, but also increases the surface area of ​​the material and greatly improves the hydrophilic property of the material. Compared with the previous method of modifying the shape-fixed phas...

Embodiment 2

[0028] Pre-cut the shaped phase change material into cubes of about 20x15x10mm, put it into the crushing device and undergo physical crushing for 10-15 seconds, break it into granular materials with an equivalent diameter of less than 2mm and take it out to obtain the modified shaped phase change material. Usually, after the shape-setting phase change material is processed in the reactor, it is quickly cooled from a high-temperature viscous slurry to a block shape, which has strong hydrophobicity; Influenced by characteristics, its thermal conductivity is relatively poor, and its thermal conductivity is about 0.2W / (m·℃).

[0029]Processing the bulk shape-shaped phase change material into particles with an equivalent diameter of less than 2mm not only changes the geometric shape of the material, but also increases the surface area of ​​the material and greatly improves the hydrophilic property of the material. Compared with the previous method of modifying the shape-fixed phase...

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Abstract

Belonging to the field of building materials, the invention relates to a cement composite shape-stabilized phase change material mortar, a preparation method and application thereof. The mortar comprises a shape-stabilized phase change material with a particle size of less than 2mm, cement and sand, wherein the shape-stabilized phase change material is formed by taking a paraffin substance as the main heat storage agent, and using high density polyethylene, a styrene-butadiene-styrene triblock copolymer and expanded graphite as an encapsulation support, and the cement accounts for 20%-25% of the total dry weight, the shape-stabilized phase change material accounts for 50%-60% of the dry weight, and the water adding amount accounts for 27%-33% of the dry weight. The invention also provides a preparation method. The cement composite shape-stabilized phase change material mortar provided by the invention can be directly applied to the building wall surface, or be pasted on the building wall surface after being cast in situ into a precast slab to form a composite phase change heat storage wall so as to improve the heat storage capacity of the building envelope structure. The cement composite shape-stabilized phase change material mortar provided by the invention has the advantages of wide material sources, low cost, good storage durability, and wide application range.

Description

technical field [0001] The invention relates to a mortar and its preparation method and application, in particular to a cement composite shape-setting phase-change material mortar and a preparation method thereof, belonging to the field of building materials. Background technique [0002] The thermal performance of the building envelope (exterior walls, roofs, interior partitions, floors, etc.) directly affects the thermal environment characteristics of the building rooms it constitutes. Due to the thermal inertia of the enclosure structure, it directly affects the heat transfer and temperature fluctuation of the enclosure structure. Generally, the greater the heat capacity of the envelope, the greater the heat storage capacity and the better the corresponding thermal stability. The room temperature under the conditions of this envelope structure is more resistant to external disturbance fluctuations, which is of great significance for reducing building energy consumption a...

Claims

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Application Information

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IPC IPC(8): C04B28/02C04B14/06C04B24/00C04B16/08C04B24/26
Inventor 陈超孙诗兵焦庆影谢光亚凌浩恕
Owner BEIJING UNIV OF TECH
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