Paraffin-SiO2-TiO2 phase change microcapsule and preparation method thereof as well as application of microcapsule in preparing heat-accumulation thermal insulation coating

Abstract

The invention discloses a paraffin-SiO2-TiO2 phase change microcapsule. The paraffin-SiO2-TiO2 phase change microcapsule is formed with oil-phase paraffin as a core and a composite material of titanium dioxide and silicon dioxide as a shell. The invention also discloses a method for preparing the paraffin-SiO2-TiO2 phase change microcapsule by use of a sol-gel method, and finally discloses an application of the paraffin-SiO2-TiO2 phase change microcapsule in preparing a heat-accumulation thermal insulation coating, wherein the coating is prepared from the paraffin-SiO2-TiO2 phase change microcapsule, titanium dioxide, calcium carbonate, a styrene-acrylic emulsion and various auxiliaries. The phase change microcapsule with the composite structure has excellent mechanical properties and excellent optical properties; the preparation method of the phase change microcapsule is simple in process, low in cost and capable of effectively solving the problem of leakage during solid-liquid phase change; the heat-accumulation thermal insulation coating prepared from the microcapsule has excellent heat accumulation and thermal insulation properties, and is capable of effectively improving the thermal comfort of a building and reducing the energy consumption of the building.

Description

technical field [0001] The present invention relates to a kind of paraffin-SiO 2 -TiO 2 The phase-change microcapsule also relates to the preparation method of the above-mentioned phase-change microcapsule, and finally relates to the application of the phase-change microcapsule in preparing heat storage and thermal insulation coatings, and belongs to the field of phase-change materials. 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 industrializ...

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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. There is a problem that the adsorption of organic phase change materials in expanded perlite 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.

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