High-temperature inorganic nano phase change energy storage material and preparation method thereof

Abstract

The invention discloses a high-temperature inorganic nano phase change energy storage material and a preparation method thereof, and belongs to the technical field of building low carbon and energy saving. The inorganic nano energy storage material is formed by taking silica gel, titanium oxide and manganese dioxide powder which are hydrolyzed by ethyl orthosilicate Si(OC2H5)4, tetrabutyl titanate Ti(OC2H5)4 and manganous nitrate Mn(NO3)2 as a nano rubber power wall material, taking cobaltous sulfate heptahydrate CoSO4.7H2O as a core material, and encapsulating the nano inorganic salt hydrate phase change core material with the nano rubber power wall material. The phase change temperature is 96.8 DEG C, and the energy storage material is suitable for serving as a thermal insulation and heat preservation material of a high-temperature drying room.

Description

technical field [0001] The invention belongs to the technical field of low-carbon and energy-saving buildings, and specifically relates to a high-temperature inorganic nano phase-change energy storage material and a preparation method thereof. Background technique [0002] A large amount of heat is generated in the natural environment every day, such as: solar energy, animal body radiation heat, combustion heat, friction heat, object running heat, etc. Phase change energy storage materials are substances that absorb the heat during the phase change process, and release it to the environment when needed, so as to achieve the purpose of controlling the ambient temperature and saving energy. According to its chemical composition, it can be divided into: organic phase change energy storage materials, hybrid phase change energy storage materials and inorganic phase change energy storage materials. Organic phase change energy storage materials have the advantages of good chemical...

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Problems solved by technology

In order to solve the above problems, the inventors proposed various schemes, such as "A Heat Storage Medium and Its Application", application number 200610104583.8, which proposed a salt water compound composed of magnesium nitrate, magnesium chloride and water to form a eutectic; "An Inorganic Phase Change Energy Storage "Material", application number 201210037753.0, by adding nucleating agent and dispersant to inorganic salt hydrate; Anti-supercooling agent sodium tetraborate, although these methods have some effects, they are only limited to certain systems, and there are certain limitations in the selection and use of phase change energy storage materials. The inventors of the present invention have found that the inorganic salt hydrate Phase-change energy storage materials are dispersed into nano-scale particles and wrapped into nano-microcapsules, which can well solve the problems of supercooling and phase separation of phase-change energy storage materials. The inventors developed a series of nano-inorganic phases based on this discovery and idea Variable energy storage materials, the present invention is exactly one of this inorganic phase change energy storage materials developed

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