Phase-change foamied insulation board based on phenolic foam waste, and preparation method thereof

Abstract

The invention discloses a phase-change foamed insulation board based on phenolic foam waste, and a preparation method thereof. The phase-change foamed insulation board comprises, by mass, 30-40 partsof phenolic foam waste, 15-25 parts of an organic phase-change thermal insulation material, 25-35 parts of cement, 15-20 parts of fly ash, 10-15 parts of desulfurized gypsum powder, 2-3 parts of an alkali activator, 1-1.5 parts of a silane coupling agent, 3-4 parts of a foaming agent A, 5-10 parts of a foaming agent B and 30-40 parts of water. The foamed insulation board is prepared by taking thephenolic foam waste as the raw material for the first time, so that the foamed insulation board has the characteristics of light weight, fire prevention, heat preservation, heat insulation and flame retardance, opens up a new thought for resource utilization of the phenolic foam waste and improves the added value of the phenolic foam waste.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a phase-change foam insulation board based on phenolic foam waste and a preparation method thereof. Background technique [0002] Phenolic foam is foamed from thermosetting phenolic resin. It is known as the "king of thermal insulation materials" and is a new generation of thermal insulation, fireproof and sound insulation materials. Phenolic foam has the characteristics of light weight, fireproof, non-combustible in case of open flame, smokeless, non-toxic, non-dripping, wide range of operating temperature (-196~+200℃), non-shrinking and non-brittle in low temperature environment. Due to the high closed cell rate of phenolic foam, low thermal conductivity, good thermal insulation performance, and certain water resistance and water vapor permeability, at the same time, because phenolic foam has a benzene ring structure, it is dimensionally stable. Compared ...

AI Technical Summary

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

Images