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Phase change thermal storage cement mortar containing rubber powder and preparation method thereof

A cement mortar, phase change heat storage technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of low affinity effect, easy to bring pollution, etc. Thermal effect, improved compaction, improved life cycle effect

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the microcapsules prepared by this method choose urea and formaldehyde as the capsule wall materials, which are likely to cause pollution during the production process and use process, especially for civil buildings, which will also have some adverse effects in terms of fire prevention.
In addition, choosing to add a coupling agent to improve the compatibility of paraffin microcapsules and inorganic gel materials will only have an effect to a certain extent, and the direct affinity effect is not obvious

Method used

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  • Phase change thermal storage cement mortar containing rubber powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Take the phase change latent heat of 157.7 kJ / kg 25 # Put 20 parts of paraffin wax and 0.5 parts of sodium lauryl sulfate into a beaker, place it in a magnetic constant temperature stirrer, heat it to 50 ° C, and adjust the speed to 500 rpm after the paraffin wax is completely melted, and mix evenly to form an oil phase material; Add 80 parts of silica sol with a content of 35wt% to 300 parts of deionized water, stir at 1000 rpm at room temperature, obtain 60 parts of silicon dioxide after hydrolysis, and make a water phase material; add the oil phase material to the water phase material, and Stir at 800rpm at 50°C for 30 minutes to form an emulsion; then add 60 parts of rubber powder, and add 20 parts of γ-mercaptopropyltrimethoxysilane according to the mass ratio of organic phase change material and coupling agent 1:1, the original temperature Continue stirring for 20 minutes, filter, wash, and dry to obtain phase-change energy storage microcapsules A with silica-rubb...

Embodiment 2

[0043] In Example 1, during the preparation of phase-change energy storage microcapsules, the number of parts of rubber powder was reduced from 60 parts to 40 parts to obtain phase-change energy storage microcapsules B. The latent heat value of B measured by DSC is 65.3kJ / kg, and the diameter of B measured by scanning electron microscope (SEM) is about 10 μm. The remaining materials and operating conditions remain unchanged, and the phase change thermal storage cement mortar B containing rubber powder is obtained 1 . The latent heat value of mortar measured by DSC is 37.5 kJ / kg.

Embodiment 3

[0045] In Example 2, keeping the rest of the materials and operating conditions unchanged, the number of phase change energy storage microcapsules B was reduced to 10 parts to obtain phase change heat storage cement mortar B containing rubber powder 2 . The latent heat value of mortar measured by DSC is 25.1kJ / kg.

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Abstract

The invention discloses a phase change thermal storage cement mortar containing rubber powder. The formula of the cement mortar (by mass portion) is as below: 5-40 portions of a phase change energy storage material, 100 portions of cement, 120-280 portions of sand and 5-30 portions of water. The phase change energy storage material has a microcapsule structure, and is composed of a capsule wall and a capsule core; the capsule core uses an organic phase change material; and the capsule wall is a silica-rubber powder composite capsule wall material. The preparation method of the cement mortar is as below: (1) adding an oil phase material formed by mixing an organic phase change material and a surface active agent into an aqueous phase material containing silica, dispersing the mixture uniformly in an emulsion, then quickly adding a coupling agent and the rubber powder, filtering, washing and drying to obtain the phase change energy storage material; (2) mixing the cement, sand, additives and the phase change energy storage material into a dry material; and (3) adding water to the dry material. The phase change thermal storage cement mortar containing rubber powder provided by the invention has the advantages of phase change thermoregulation, long service life, excellent physical and chemical properties, environment-friendliness, no toxicity, and wide application range, etc.

Description

technical field [0001] The invention relates to a cement mortar and a preparation method thereof, in particular to a phase change thermal storage cement mortar containing rubber powder and a preparation method thereof. Background technique [0002] my country is a country that is relatively short of energy. The per capita energy consumption is only 40% of the world level, but the total energy consumption accounts for the second in the world, and the construction industry is a large energy-consuming household in the national economy. According to reports, 95% of my country's existing buildings fail to meet energy-saving standards, and more than 80% of new buildings fail to meet energy-saving standards. The energy consumption per unit building area is 2 to 3 times that of developed countries, which has already caused a heavy energy burden to the society. . In addition, with the rapid development of the domestic automobile industry, the output of waste tires will increase at a ...

Claims

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Application Information

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IPC IPC(8): C04B28/06C04B28/04C04B18/22C04B24/08
CPCY02W30/91
Inventor 赵亮方向晨王刚
Owner CHINA PETROLEUM & CHEM CORP
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