Composite phase-change energy storage material for microcapsule and preparation method thereof

Abstract

The invention discloses a composite phase-change energy storage material for microcapsules and a preparation method thereof. The coating of the microcapsule is made of silicon dioxide, and the core of the microcapsule is made of a phase-change energy storage material, wherein the phase-change energy storage material is a paraffin organic solid-liquid phase-change energy storage material. 0.2 to 0.5 wt.% of dispersed emulsifier, 52.5 to 62.5 wt.% of solvent water, 18.75 to 31.5 wt.% of phase-change energy storage material and 15.5 to 18.75 wt.% of inorganic silica source are matched and put into a reactor for stirring for 5 to 8 hours; the mixture is uniformly dispersed and emulsified at the temperature 3 to 8 DEG C higher than that for solid-liquid phase change; hydrochloric acid aqueous solution catalyst with the pH value of 0.93 to 4.07 or sodium hydroxide aqueous solution catalyst with the pH value of 8.0 to 12.0 is added into the emulsion; the reacting solution is naturally cooled to room temperature and precipitation solution is obtained; the precipitate is washed with the combination of water and petroleum ether, wherein the mass percent of the petroleum ether is 30 wt.%; then the precipitate is washed with deionized water and is filtered, and the product is naturally aired. The invention improves the technology of phase-change energy storage and conservation, and has the function of automatic temperature regulation, favorable physical and chemical stability, crack resistance, flame retardancy, wear resistance and high thermal conductivity.

Description

technical field [0001] The invention relates to a microcapsule composite phase change energy storage material and a preparation method thereof, in particular to a microcapsule composite phase change energy storage material coated with an inorganic shell material and a preparation method thereof. Background technique [0002] With the continuous increase of world population, the situation of energy shortage is severe. The sustainable development of energy is a major problem in today's world. There are two basic ways to solve this problem: one is to rely on scientific and technological progress to invent or develop substitutes for current energy sources; the other is to research new energy-saving technologies to reduce energy consumption. Phase change energy storage is one of the very important energy-saving technologies. It uses the phase change latent heat of phase change energy storage materials to realize energy storage and utilization, which helps to improve energy utili...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a microcapsule composite phase change energy storage material coated with an inorganic shell material with high thermal conductivity and a preparation method thereof. The method proposes an organic / inorganic composite microcapsule composite phase change Energy storage materials, which combine the advantages of organic and inorganic materials, mainly solve the problem of low thermal conductivity of microcapsule composite phase change energy storage materials coated with traditional organic shell materials, and phase change materials are easy to leak from microcapsule shell materials , The organic shell material has low compressive strength, poor impact resistance, crack resistance, and toughness, and is prone to cracks due to climate change, resulting in poor aging resistance of the material, resulting in microcapsule phase change energy storage and automatic temperature control Performance failure, while reducing the release of toxic and harmful substances, meeting the requirements of energy conservation and environmental protection

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