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Phase-change energy-storing wax microcapsule material for building and preparation method thereof

A phase-change material and phase-change energy storage technology, applied in sustainable buildings, heat exchange materials, chemical instruments and methods, etc., can solve problems such as difficulty in popularization and utilization, poor mechanical properties, and poor chemical stability, and achieve easy industrialization. , good thermo-oxidative stability, the effect of a wide range of sources

Inactive Publication Date: 2011-06-01
TIANJIN DEHAO NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the single-wall phase-change energy storage microcapsule wall material is brittle, and its mechanical properties and chemical stability are poor, so it is difficult to popularize and utilize.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (a) Prepolymerization of the capsule wall

[0026] Mix 18.3g of 37% formaldehyde aqueous solution with 9g of urea, add dropwise triethanolamine to adjust pH=8, heat to 50°C, and keep the reaction for 1 hour. During the middle 30 minutes, melamine with a mass fraction of 10% was added. Add 85g of deionized water after the reaction to form a stable prepolymer solution for subsequent use.

[0027] (b) Thermal conductivity modification of core material

[0028] Take 20g of solid paraffin core material, add 400 mesh graphite with 0.8% of the core material mass, and stir at 50°C for 30min to prepare a mixture.

[0029] (c) Emulsification of phase change materials

[0030] Keep the temperature at 50°C, add 12g Nacl and 2.13g emulsifier OP-10 in 100ml deionized water, heat and melt the mixture prepared in b and pour it into the reaction vessel, then add 0.4g antioxidant and 0.4g heat stabilizer, Mechanical stirring 300r / min, emulsification 45min.

[0031] (d) Cyst

[0032...

Embodiment 2

[0039] (a) Prepolymerization of the capsule wall

[0040] Mix 9.46g of formaldehyde solution (mass fraction 37%) and 4.00g of urea, adjust the pH value to 8.5 with triethanolamine, stir in a water bath at 50°C for 1 hour, add 75g of distilled water and mix to obtain a transparent prepolymer solution.

[0041] (b) Thermal conductivity modification of core material

[0042] Take 20 g of solid paraffin core material, add 400 mesh graphite with 0.6% of core material mass, and stir at 50°C for 30 minutes to prepare a mixture.

[0043] (c) Emulsification of phase change materials

[0044] Mix 0.39g Tween 60, 0.36g Span 60, 4g Nacl, 1g OP-10, b and 40mL of distilled water, and emulsify in a water bath at 50°C for 30min at 400r / min to obtain a core material emulsion.

[0045] (d) Cyst

[0046] The rotation speed was adjusted to 240r / min, and the temperature was kept at 50°C. Before the prepolymer solution was added dropwise, the core material emulsion was acidified for the first st...

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Abstract

The invention provides a phase-change energy-storing wax microcapsule material used in the building field, which is characterized in that a capsule wall at the inner layer is made of tripolycyanamide modified urea resin and an outer layer is made of silicon dioxide, and the inner layer and the outer layer totally account for 20-45% of the total mass of a microcapsule; and a phase-change materials is an organic phase-change material and accounts for 80-55 percent of the total mass of the microcapsule. A core material is subjected to heat-conduction modification by adopting graphite, the surface of the microcapsule is modified by adopting a sol-gel method to ensure that the dual-layer microcapsule phase-change material used in the building field has better mechanical strength, heat conduction property and hot oxygen stability. The phase-change energy-storing wax microcapsule material provided by the invention has the advantages of low cost and wide source range of the raw materials; and the building wall body material with a self-temperature-regulating function is prepared by doping the phase-change microcapsule material into gypsum.

Description

technical field [0001] The invention relates to a preparation and modification technology of phase change energy storage wax microcapsules and its application in construction. Background technique [0002] With the rapid development of global industry, the world's energy is becoming increasingly tense, and environmental pollution is becoming more and more serious. The research and development of material science, environmental protection and energy saving, and the development of new energy have become a major theme in today's world. With their own special functions, energy storage materials will be widely used in solar energy utilization, industrial waste heat utilization, energy conservation, environmental protection, information, engineering insulation materials, medical care and other fields. [0003] Microcapsule-coated PCM (PCM is the abbreviation of phase change material) technology has developed rapidly in recent years. Microcapsule phase-change materials use microc...

Claims

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Application Information

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IPC IPC(8): C09K5/06E04D13/18
CPCY02B10/22Y02B10/20
Inventor 揣成智程远陈昊
Owner TIANJIN DEHAO NEW MATERIALS
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