Method for preparing composite phase change materials on basis of polished ceramic tile waste materials

Abstract

The invention discloses a method for preparing composite phase change materials on the basis of polished ceramic tile waste materials. The method includes steps of (1), preparing lauric acid / stearic acid eutectic phase change materials with the phase change temperatures of approximately 30 DEG C; (2), calcining the lauric acid / stearic acid eutectic phase change materials in muffle furnaces to obtain finished porous ceramic powder; (3), pouring the finished porous ceramic powder into hydrochloric acid solution, soaking the finished porous ceramic powder in the hydrochloric acid solution, and stirring the finished porous ceramic powder in the hydrochloric acid solution from time to time until bubble is unavailable; (4), placing activated ceramic powder in modification liquid, placing the modification liquid with the activated ceramic powder into water bath kettles, carrying out oscillation for 10 min, then carrying out suction filtration, sequentially washing the activated ceramic powderby absolute ethyl alcohol and distilled water by 4-5 times and drying the activated ceramic powder at the temperature of 105 DEG C for standby application; (5), weighing modified porous ceramic powder and the lauric acid / stearic acid eutectic phase change materials, heating and melting the modified porous ceramic powder and the lauric acid / stearic acid eutectic phase change materials, sufficiently mixing the modified porous ceramic powder and the lauric acid / stearic acid eutectic phase change materials with one another, further adding cement into the modified porous ceramic powder and the lauric acid / stearic acid eutectic phase change materials, and stirring the cement, the modified porous ceramic powder and the lauric acid / stearic acid eutectic phase change materials to obtain the composite phase change materials. The method has the advantages that processes for preparing the composite phase change materials, composite phase change materials are simple, the method is high in waste material utilization rate, the composite phase change materials have high phase change latent heat, are good in heat stability and have the appropriate phase change temperatures as compared with generalphase change materials, and accordingly the method is high in industrialization ability and has an excellent application prospect.

Description

technical field [0001] The invention relates to a method for preparing a composite phase-change material based on ceramic polished brick waste, and belongs to the field of phase-change heat storage materials. Background technique [0002] Phase change energy storage materials have the ability to change their physical state within a certain temperature range. As the physical state changes, the temperature of the material itself remains almost unchanged until the phase transition is completed, forming a wide temperature platform, but it can effectively absorb or release heat, thereby achieving the effect of temperature regulation. Therefore, phase change energy storage materials have gradually been applied in fields such as construction, aerospace, clothing, and military affairs. Especially in the construction industry, phase change energy storage building materials have the advantages of both ordinary building materials and phase change materials. At the same time, phase ch...

AI Technical Summary

Problems solved by technology

With the rapid development of the polished tile industry, the ceramic waste brought about by production has not been effectively utilized, and it is disposed of in a simple way of landfill, which not only causes waste of land and resources, but also causes serious damage to the surrounding environment. pollution

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