Ternary composite phase-change thermal-insulation foam building material and preparation method thereof

Abstract

The invention discloses a ternary composite phase-change thermal-insulation foam building material and a preparation method thereof. The ternary composite phase-change thermal-insulation foam buildingmaterial comprises the following raw materials in parts by mass: 40-50 parts of Portland cement, 20-35 parts of river sand, 15-25 parts of slag powder, 5-10 parts of basalt fiber, 15-35 parts of phase-change thermal-insulation aggregate, 8-12 parts of a composite foaming agent and 45-55 parts of water. According to the phase-change heat-preservation aggregate, modified silicon oxide aerogel serves as a carrier, immobilized decanoic acid, palmitic acid and dodecanol are adsorbed, and calcium carbonate is used for hole sealing and embedding treatment. The composite foaming agent is prepared bymixing soybean protein, wool hydrolyzed protein liquid, lauryl sodium sulfate and triethanolamine according to the mass ratio of 1: (3-6): (0.5-0.8): (0.15-0.2). The building material has the characteristics of being porous, light, capable of preserving heat and insulating heat, high in mechanical strength, durable, weather-proof, resistant to creep and the like, and can improve the indoor comfort.

Description

technical field [0001] The invention belongs to the technical field of preparation of thermal insulation building materials, and in particular relates to a ternary composite phase-change thermal insulation foam building material and a preparation method thereof. Background technique [0002] Phase change insulation materials refer to substances that change their physical form and provide latent heat with temperature changes. During the phase change process from solid to liquid or from liquid to solid, the phase change material will absorb or release a large amount of latent heat. This reaches the effect of energy storage and heat preservation. At present, the methods of applying phase change materials to building materials mainly include: 1) Porous material adsorption method: add porous building materials to molten phase change materials, and use the capillary adsorption force of the material pores to adsorb the phase change materials on the surface of the material. 2) dire...

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Problems solved by technology

At present, the methods of applying phase change materials to building materials mainly include: 1) Porous material adsorption method: add porous building materials to molten phase change materials, and use the capillary adsorption force of the material pores to adsorb the phase change materials on the surface of the material. 2) direct addition method: phase change material is used as a component of building materials, and physical doping is directly carried out in the preparation stage of building materials; 3) microcapsule method is to wrap phase change material particles into a layer of stable performance Polymer membranes, which are solid particles with a core-shell structure formed by sealing them in microcapsules formed by polymer membranes; but the above methods all have shortcomings, such as the materials prepared by the porous material adsorption method will lose The problem of liquid phase leakage occurs. The direct addition method will cause less storage of phase change materials. During long-term use, phase change materials are prone to phase separation of building materials, thereby reducing the service life of building materials. Although the microencapsulation method can isolate phase change materials Direct contact with the external environment solves the problem of liquid phase leakage, but all phase change materials are used as the inner core material, and the building materials have low mechanical strength and are prone to creep, especially after the internal phase change materials are all converted into liquid phase, and the production Expensive, high technical requirements, need to use a large amount of phase change substances

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