Preparation method and application of phase change material for energy-saving building

A phase change material and construction technology, applied in the field of construction materials, can solve the problems of large supercooling, small thermal conductivity, large volume change, etc., and achieve the effect of improving thermal stability and compressive strength

Active Publication Date: 2017-07-28
烟台华虹建筑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic materials have large heat of solution, high thermal conductivity, small phase change volume, and low price. The disadvantages are: large degree of supercooling, easy to produce phase separation and adverse effects such as aging and deterioration; organic materials have good solid formation and are not suitable for phase change. Separation and supercooling phenomenon, low corrosion, stable performance, but small thermal conductivity, low density, volatile, flammable, and large volume change during phase change, etc.

Method used

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  • Preparation method and application of phase change material for energy-saving building
  • Preparation method and application of phase change material for energy-saving building
  • Preparation method and application of phase change material for energy-saving building

Examples

Experimental program
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Effect test

Embodiment 1

[0025] 1. Preparation of phase change materials for energy-saving buildings

[0026] Include the following steps:

[0027] 1) 300 g myristic acid, 200 g capric acid, 2 kg 2-hydroxyethyl acrylate, 3.3 kg methyl methacrylate and 100 g α-[tris(phenylmethyl)phenyl]-ω-hydroxypoly(oxy Base-1,2-ethylene) was added to 50L of purified water, and then sheared at 60°C with a 100L high-shear dispersing emulsifier for 3 hours to obtain an emulsion;

[0028] 2) Add 6g of dibenzoyl peroxide to the emulsion obtained in step 1), then raise the temperature to 80°C, and add dropwise an aqueous solution of ferrous chloride with a concentration of 0.2mol / L (containing 2.1g of ferrous chloride) to obtain solution to be polymerized;

[0029] 3) Add 6.3kg α,ω-dimethacrylate-based polyethylene glycol in batches to the solution to be polymerized, then add 0.9kg chitosan at a time and stir at high speed for 20min, and finally add 1.2kg 12%wt poly Formaldehyde aqueous solution, after the dropwise addi...

Embodiment 2

[0040] Prepare phase-change mortar for energy-saving buildings. The specific preparation method includes the following steps: 100 parts by weight of cement, 20 parts of phase-change material (prepared in Example 1), 40 parts by weight of expanded perlite, 8 parts of polycarboxylate Acid-based water reducer, 300 parts of water, 15 parts of latex powder ethylene-vinyl acetate copolymer, 5 parts of aliphatic air-entraining agent, 11 parts by weight of polypropylene fiber, 22 parts by weight of a mixture of heavy calcium powder and light calcium powder ( 11 parts of heavy calcium powder, 11 parts of light calcium powder) and stir well.

[0041] The physical and mechanical properties of the prepared phase change mortar were tested according to the testing method in GB / T 20473-2006, and the results are shown in Table 2:

[0042] Table 2 Test results of physical and mechanical properties of phase change mortar

[0043]

[0044] The above results show that the phase change mortar ...

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Abstract

The invention belongs to the technical field of building materials and in particular relates to a preparation method and application of a phase change material for an energy-saving building. According to the preparation method disclosed by the invention, the phase change material of a microcapsule structure is prepared by taking tetradeconic acid, capric acid, 2-hydroxyethyl acrylate, methyl methacrylate, alpha, omega-dimethacrylate based polyethylene glycol, chitosan and the like as raw materials. The phase change material of the microcapsule structure prepared by the invention has a phase change temperature of 15.9-26.3 DEG C, and the phase-change potential heat value is 100.6-102.4J / g; moreover, differential scanning calorimetry indicates that the phase change material of the microcapsule structure prepared with the method has excellent thermal stability and remains initial thermodynamic property after 100 times of cool-thermal cycling.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a preparation method and application of a phase-change material for energy-saving buildings. Background technique [0002] With the acceleration of domestic urbanization and the extremely hot real estate market, the use of building materials has also reached a new peak. The resulting substantial increase in building heating and cooling will lead to serious energy and environmental crises in the long run. Therefore, building energy-saving technologies have received extensive attention and attention. Phase change materials are a very active field of development and research in energy utilization and material science at home and abroad in recent years. Phase change materials are classified into inorganic and organic based on chemical composition. Inorganic materials have large heat of solution, high thermal conductivity, small phase change volume, and low pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C08F283/06C08F220/14C08F220/28C04B28/00
CPCC04B28/00C08F283/06C09K5/063C04B2103/0071C04B14/185C04B2103/302C04B24/26C04B2103/304C04B16/0633C04B14/28C08F220/14Y02E60/14
Inventor 王晓平石佳妮张杰许福亮郝永磊范庆生
Owner 烟台华虹建筑科技有限公司
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