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Phase-change heat storage insulation coating based on phase-change heat storage as well as preparation method and application of coating

A thermal insulation coating and phase-change heat storage technology, which is applied in the field of wall thermal insulation coatings and phase-change heat storage materials, can solve the problems of low thermal conductivity of phase-change microcapsules, slow heat storage and release rate, and easy leakage, and achieve excellent performance. Heat storage and insulation performance, improvement of thermal comfort, and effect of reducing building energy consumption

Inactive Publication Date: 2014-10-08
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this paint is black and generally cannot be used as a surface layer in buildings.
Chinese patent CN102190932A introduces a composite phase change energy storage architectural coating, which uses expanded perlite as the carrier of the phase change material, and uses vacuum adsorption to absorb the organic phase change material into the porous structure of the expanded perlite. The adsorption of phase change materials is not tight enough, and it is easy to leak after many cycles
Chinese patent CN102391770A uses melamine-urea-formaldehyde resin as the carrier of phase-change materials, synthesizes phase-change microcapsules by in-situ polymerization, and adds this phase-change microcapsules into coatings to make phase-change energy-saving coatings, because it uses polymers as The inclusions of phase change materials have the disadvantages of low thermal conductivity of phase change microcapsules and slow heat storage and release rates.

Method used

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  • Phase-change heat storage insulation coating based on phase-change heat storage as well as preparation method and application of coating
  • Phase-change heat storage insulation coating based on phase-change heat storage as well as preparation method and application of coating
  • Phase-change heat storage insulation coating based on phase-change heat storage as well as preparation method and application of coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 20g of secondary deionized water into the three-necked flask, adjust the pH to 2 with hydrochloric acid, add 10ml of ethanol, 10.4g of tetraethyl orthosilicate, and stir at 60°C to form a sol. Dissolve 10 g of paraffin in 100 ml of deionized water, add sodium lauryl sulfate with 1% paraffin mass, and emulsify with ultrasonic vibration to obtain a milky white emulsion. The emulsion was added dropwise to the silica sol. Continue to stir the reaction after the dropwise addition is complete. After the liquid is cooled, put it into a constant temperature bath at 0°C, stir, add 17g of tetrabutyl titanate and 40ml of ethanol dropwise, and stir to obtain a gel. After airtight aging at room temperature, filter and wash with alcohol and deionized water. After vacuum drying, paraffin / SiO 2 -TiO 2 Phase change microcapsules, named PCM1.

[0027] Dissolve 15g of propylene glycol and 2g of hydroxyethyl cellulose in 40g of deionized water, then add 2g of mineral oil-based def...

Embodiment 2

[0029] Add 20g of secondary deionized water into the three-necked flask, adjust the pH to 2 with hydrochloric acid, add 10ml of ethanol, 10.4g of tetraethyl orthosilicate, and stir at 60°C to form a sol. Dissolve 20 g of paraffin in 100 ml of deionized water, add sodium lauryl sulfate with 1% of the mass of paraffin, and emulsify with ultrasonic vibration to obtain a milky white emulsion. The emulsion was added dropwise to the silica sol. Continue to stir the reaction after the dropwise addition is complete. After the liquid is cooled, put it into a constant temperature bath at 0°C, stir, add 17g of tetrabutyl titanate and 40ml of ethanol dropwise, and stir to obtain a gel. After airtight aging at room temperature, filter and wash with alcohol and deionized water. After vacuum drying, paraffin / SiO 2 -TiO 2 Phase change microcapsules, named PCM2.

[0030] Dissolve 20g of propylene glycol and 5g of hydroxyethylcellulose in 60g of deionized water, then add 3g of high-viscosi...

Embodiment 3

[0032] Add 20g of secondary deionized water into the three-necked flask, adjust the pH to 2 with hydrochloric acid, add 10ml of ethanol, 10.4g of tetraethyl orthosilicate, and stir at 60°C to form a sol. Dissolve 15 g of paraffin in 100 ml of deionized water, add sodium lauryl sulfate with 1% of the mass of paraffin, and emulsify with ultrasonic vibration to obtain a milky white emulsion. Add the emulsion to the sol drop by drop, and continue to stir the reaction after the dropwise addition is completed. After the liquid is cooled, put it into a constant temperature bath at 0°C, stir, add 17g of tetrabutyl titanate and 40ml of ethanol dropwise, and stir to obtain a gel. After airtight aging at room temperature, filter and wash with alcohol and deionized water. After vacuum drying, paraffin / SiO 2 -TiO 2 Phase change microcapsules, named PCM3.

[0033] Dissolve 17g of propylene glycol and 3g of hydroxyethyl cellulose in 50g of deionized water, then add 2.5g of defoamer and 1...

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Abstract

The invention discloses a paraffin / SiO2-TiO2 phase-change microcapsule. According to the microcapsule, a phase-change material is formed by paraffin or a fatty acid and other organic phase-change materials; SiO2 generated due to the hydrolysis of tetraethyl orthosilicate is taken as a backing material of the phase-change material; TiO2 generated due to the hydrolysis of tetrabutyl titanate is taken as a modified material of a reflecting property. The invention further discloses a phase-change heat storage insulation coating based on phase-change heat storage as well as a preparation method and an application of the coating. The paraffin / SiO2-TiO2 phase-change microcapsule is prepared by carrying out the following steps: wrapping the paraffin by utilizing the excellent mechanical property of SiO2 and then depositing TiO2 on the surface layer of the phase-change microcapsule. Thus, the phase-change microcapsule with a composite structure is good in mechanical property and excellent in optical property. The prepared phase-change heat storage insulation coating is good in heat storage and heat insulation, and can be used for effectively improving the heat comfortability of a building and lowering the energy consumption of the building.

Description

technical field [0001] The invention belongs to the field of wall thermal insulation coatings and phase change heat storage materials, and in particular relates to a phase change heat storage thermal insulation coating based on phase change heat storage and a preparation method and application thereof. Background technique [0002] The increasing shortage of energy is a global problem, and energy issues have caused many economic and social problems. How to use energy efficiently and recyclably, develop and use low-grade energy has become an urgent issue to be solved. All countries in the world regard the development of new energy technology as the core content of future development. my country has now entered a new development period of building a well-off society in an all-round way, and it is urgent to solve the contradictions between population, resources, environment and industrialization, urbanization, and rapid economic growth. The "Twelfth Five-Year Plan" clearly po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D125/14C09D5/00C09D7/12B01J13/02
Inventor 李敏刘健鹏
Owner SOUTHEAST UNIV
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