Organic matter/expandable graphite composite phase change heat-storing building material and preparation method thereof

Abstract

The present invention discloses an organic matter / expanded graphite composite phase-changing heat-storing building material and the preparation thereof, the method comprises the following procedures: (1) the swelling of the acidic graphite under the function of the microwave to form the expanded graphite with abundant micropore structure; (2) executing blending adsorption to the organic phase-changing material and the expanded graphite at the condition higher than the phase transition temperature, and the organic phase-changing material is adsorbed to the micropore structure of the expanded graphite; (3) the preparing of the organic / expanded graphite composite phase-changing heat storing building material comprising the following steps: (a) the preparing of the heat storing fiber gypsum board, (b) the preparing of the heat storing cement. The method of the invention settles the compatibility of the problem of organic phase-changing material and the building material and the stability. The organic / expanded graphite composite phase-changing heat storing building material has the advantages of low cost, large heat storing density, good heat conducting property and no inflammability.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to a preparation method of an organic matter / expanded graphite composite phase change heat storage building material. Background technique [0002] Modern buildings generally use lightweight materials as enclosure structures, but the heat capacity of ordinary lightweight materials is small, resulting in large fluctuations in indoor temperature, which not only makes the indoor thermal environment uncomfortable, but also increases the load of air conditioning and building energy consumption. Phase-change substances (including inorganic substances and organic substances) do not change in temperature during melting or solidification, but absorb or release a considerable amount of latent heat. Organically combining phase change materials with common building materials forms a heat storage building material that has the dual functions of common building materials and phase ...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome and solve the existing organic phase change heat storage building materials in practical applications, and the organic phase change materials will leak out of the building materials, which will affect the performance of the heat storage building materials and make the building materials flammable or inflammable. The shortcomings and problems of organic phase change materials such as poor heat transfer performance and high cost in the process of heat storage and release, provide a preparation method for organic / expanded graphite composite phase change heat storage building materials, so that the prepared composite phase change storage Thermal building materials have high heat storage density and low cost, and in thermal storage building materials, organic phase change materials have good compatibility with building materials, and organic phase change materials will not leak out of building materials when phase changes occur, and Organic phase change materials have good heat transfer performance in the process of heat storage and release

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