A kind of anti-powdering airgel composite thermal insulation felt and preparation method thereof

Abstract

The invention belongs to the technical field of energy-saving and environment-friendly materials, and in particular relates to an anti-powdering airgel composite thermal insulation blanket for building and industrial energy-saving and thermal insulation, which includes an airgel wet gel solution and a fiber skeleton material, and the airgel wet gel The weight ratio of the glue solution and the fiber skeleton material is 2 to 30:1; the preparation method is to immerse the fiber skeleton material into the airgel according to the weight ratio of airgel wet gel solution: fiber skeleton material = 2 to 30:1 In the wet gel solution, the fiber skeleton material is saturated to absorb the airgel wet gel solution, and the thermal insulation felt is obtained after drying. The invention overcomes the problems of high cost and easy powder loss of the existing thermal insulation felt, and the product has better performance and is more environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of energy-saving and environment-friendly materials, and in particular relates to an anti-powdering airgel composite thermal insulation blanket for building and industrial energy-saving thermal insulation and a preparation method thereof. Background technique [0002] With the rapid development of social economy, the increasing shortage of global energy has become a worldwide problem. The development of new energy, the improvement of the utilization rate of existing energy and the conservation of energy have attracted great attention from all countries. my country is an energy-poor country, therefore, rational use of energy and energy conservation are of great significance to the sustainable development of our society. Adopting new technologies and new processes to develop environmentally friendly and efficient heat insulation materials is one of the most effective and economical measures to save energy. ...

AI Technical Summary

Problems solved by technology

Second, the traditional supercritical drying process or tetraethyl orthosilicate is used as the silicon source for airgel insulation blankets. The process is long and the equipment cost is high, resulting in high product costs. Therefore, how to industrialize at low cost is also common the goal that is pursued

The airgel composite material prepared by this method has good hydrophobicity and good heat insulation, but the preparation cost is high, powder is easy to fall off, and the supercritical drying process has certain risks, which is only suitable for high-end applications and is not conducive to Mass production and commercialization

[0006] The Chinese invention patent application with the publication number CN102557577A provides a preparation and method of a silica airgel composite material, using tetraethyl orthosilicate as a silicon source, and industrially produced glass fiber or fiber cotton material as a reinforcement. The prepared silica airgel composite has the characteristics of high porosity, high specific surface area, low density, low dielectric constant and low thermal conductivity, and has good formability, but tetraethyl orthosilicate is toxic and expensive , silicon alkoxide is suitable for industrial production as a silicon source

[0007] The Chinese invention patent with the publication number 103723995A discloses a method for making felt by mixing glass wool felt and silica airgel. The invention uses a centrifugal blowing process to prepare glass wool, sprays a resin binder, and simultaneously Silica airgel slurry is sprayed on the surface of glass wool felt to form a composite material superimposed of cotton felt and airgel. The advantage is that the prepared composite material has excellent mechanical properties, good thermal insulation performance and sound absorption performance; its disadvantages The requirement for equipment is high, which virtually increases the cost. In addition, the airgel content in the prepared airgel mixed felt is relatively large, which makes the mixed felt rigid and flexible, and it is easier to drop powder, which limits its use in some field application

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