High-temperature-resisting gel composite heat-preservation material

Abstract

The invention discloses a high-temperature-resisting gel composite heat-preservation material. The high-temperature-resisting gel composite heat-preservation material is composed of an inner inorganic fiber layer, an outer inorganic fiber layer and a nano core layer, wherein the nano core layer is composed of a protective layer and a nano material layer formed by one to three inorganic fiber cloth aerogel-coated material layers, and connection of all layers of the nano core layer and connection between the nano core layer and the inner inorganic fiber layer and the outer inorganic fiber layer are achieved by adopting a high-temperature bonding agent or a sewing or combining method. The high-temperature-resisting gel composite heat-preservation material is simple in process and has the advantages of being high-temperature-resisting, good in heat-preservation performance and stability and the like.

Description

technical field [0001] The invention relates to a high temperature-resistant aerogel composite thermal insulation material, which has the advantages of high temperature resistance, good thermal insulation performance, good stability and the like, and belongs to the technical field of industrial thermal insulation materials. Background technique [0002] At present, the commonly used materials in the field of industrial insulation mainly include organic insulation materials such as polyurethane, silicate fiber insulation materials such as aluminum silicate fiber, and the newly emerging aerogel felt. Each of them has inevitable defects in use. [0003] The combustion grade of organic thermal insulation materials generally does not exceed grade B1. Although these materials have low thermal conductivity (generally between 0.027-0.050w / (m.k) at normal temperature), their operating temperature should not exceed 120 °C, which is more suitable in cooling projects. However, in the ...

AI Technical Summary

Problems solved by technology

The thermal conductivity of this material is very low, generally around 0.020 w / (m.k) at room temperature, but it has several obvious defects: First, due to the limitations of the current airgel and inorganic fiber composite technology, the inorganic The fiber material is generally glass fiber, which determines that its use temperature should not exceed 660°C; secondly, the airgel material itself has very low strength and is easily broken and scattered from the inorganic fiber gap, resulting in loss of thermal insulation performance, or broken The accumulation of airgel materials leads to extremely uneven thermal insulation properties of airgel blankets; third, the production process of airgel blankets is complicated and the efficiency is very low, resulting in high costs. At present, the market price of airgel blankets is generally aluminum silicate insulation 10-15 times of blanket

Images