A high-efficiency and energy-saving composite shape-setting phase change material and its preparation method

Abstract

The invention relates to a high-efficiency and energy-saving composite shape-stabilized phase change material and a preparation method thereof, belonging to the technical field of building materials.In order to solve the existing problems of poor insulation performance and easy leakage, the invention provides the high-efficiency and energy-saving composite shape-stabilized phase change material and the preparation method thereof; the material is prepared from 50-60 parts of a sludge shale ceramsite porous material, 30-40 parts of an organic phase change composite material and 15-2530-40 partsof a modified cement material, wherein the organic phase change composite material is a mixture of a polybasic fatty acid materials and degradable polyester, and the mass ratio of the polybasic fattyacid materials to the degradable polyester is equal to 1 to (0.05-0.2); the organic phase change composite material is absorbed in the pores of ceramsite; the modified cement material covers the surface of the ceramsite. The above-mentioned degradableed polyester and polybasic fatty acid organic phase change composite materials are heated and melted, atomized, and sprayed on the ceramsite; micro-encapsulation treatment is carried out to form a coating layer, and a corresponding composite shape-stabilizedd phase change material is obtained. The high-efficiency and energy-saving composite shape-stabilized phase change material can achieve the effects of high phase change heat storage density and low leakage.

Description

technical field [0001] The invention relates to a high-efficiency and energy-saving composite shape-setting phase-change material and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] At present, a large number of wall insulation materials used in civil engineering in my country are mainly traditional polystyrene insulation walls, which have high bulk density, high thermal conductivity, poor fire resistance, and poor crack resistance, so their applications have great limitations. Therefore, in view of the technical bottlenecks of various thermal insulation materials and wall energy-saving technologies, research on more complete and economical energy-saving technologies or energy-saving materials is of great importance for the development of "green buildings" that are warm in winter and cool in summer and promote building energy conservation. significance. [0003] On the other hand, because the phase change p...

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Problems solved by technology

At present, some researchers use cement for encapsulation and surface coating, but the effect is not ideal. After multiple phase change cycles, leakage is prone to occur, resulting in failure of the energy storage function. Therefore, the existing organic ring Oxygen resin for coating, such as Chinese patent application (publication number: CN104496544A) discloses a kind of phase change material, through the use of modified epoxy resin, epoxy resin glue, epoxy curing agent and heat conduction powder are evenly mixed to form and package, However, it needs to add thermally conductive materials to the packaging material and use organic packaging materials, which has poor bonding ability with inorganic substrate materials, and additional mineral admixtures need to be added, and its energy storage latent heat is not high.

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