Phase-change thermal-insulating powder for energy-saving thermoregulation of buildings and preparing method thereof

Abstract

The invention discloses phase-change thermal-insulating powder for energy-saving thermoregulation of buildings and a preparing method thereof and relates to the field of building energy-saving thermal insulation materials. The phase-change thermal-insulating powder is characterized in that the phase-change thermal-insulating powder is obtained by coating the surfaces of phase-change material fine particles with nanometer hydraulic gel. By means of a shell formed by the nanometer hydraulic gel, solid-liquid phase-change circulation of a phase-change material is achieved in a relatively independent space, and precipitation and leakage are avoided; particularly, massive adding can be conducted to improve energy-saving thermoregulation property without influencing the strength of a building material. Due to the fact that the shell of the phase-change material is made of the hydraulic gel, the adaptability of the powder in the building material is high, and the powder is well compatible with and can be well mixed with concrete, mortar, putty and paint. Furthermore, a heat conduction agent is added to the hydraulic gel, thermoregulation sensitivity is improved, the phase-change material can absorb or release heat in time, energy is saved, and the temperature in a building can be adjusted to be at a proper level all the time. The production process is easy to control, cost is low, and technical support is provided for the application of the phase-change material to energy-saving thermoregulation of buildings.

Description

technical field [0001] The invention relates to the field of building energy-saving thermal insulation materials, in particular to a phase-change thermal insulation powder used for building energy-saving temperature regulation and a preparation method thereof. Background technique [0002] Phase Change Material (Phase Change Material-PCM) refers to a substance that changes shape with temperature and can provide latent heat. When the temperature is high, the phase change material can absorb heat and store it in the form of phase change latent heat. When the temperature is low, the absorbed heat is released to realize the transfer of energy between different space-time positions It helps to alleviate the contradiction between energy supply and demand, and effectively reduces energy consumption. At the same time, the temperature is maintained in a relatively stable temperature range. Therefore, a residence built with phase change materials can form a permanent constant temper...

AI Technical Summary

Problems solved by technology

[0003] However, phase change material is a kind of material whose phase state changes with the change of temperature. When it is added and used, it usually causes the strength of concrete and paint to decrease and age, and even precipitate and leak, and lose its storage capacity after several cycles. adjustable temperature effect

Therefore, the application of phase change materials in the field of building energy conservation needs to solve two key problems: 1. The influence of phase change materials on the strength of building materials; 2. The precipitation, leakage and failure of phase change materials in building materials question

However, its durability is poor, and there are still leakage defects in the use of materials, especially when it is used at a high dosage, it has poor compatibility and workability with inorganic building substrates, resulting in a change in the bonding force between it and the concrete matrix. Poor, resulting in reduced strength, affecting the mixing and use in building materials