Ultrathin aerogel composite material and method for preparing same

Abstract

The invention discloses an ultrathin aerogel composite material and a method for preparing the same. Organic cloth or inorganic fiber surface felt is used as reinforcement, composition is carried out on the reinforcement and silicon dioxide aerogel to obtain the ultrathin aerogel coiled material or sheet, the organic heat conduction coefficient is lower than or equal to 0.018 w/mk, hydrophobic angles are larger than 150 degrees, the thickness of the ultrathin aerogel composite material with the organic cloth is 0.05-2 mm, and the thickness of the ultrathin aerogel composite material with the inorganic fiber surface felt is 0.1-1.5 mm. The ultrathin aerogel composite material and the method have the advantages that the ultrathin aerogel composite material prepared by the aid of the method is thin, the optimal thickness of the ultrathin aerogel composite material can reach 0.05 mm, the problems in the aspect of methods for preparing aerogel materials with the thicknesses lower than 0.3 mm and the qualification rates of products can be solved, the conventional thickness ranges of aerogel can be expanded, and the ultrathin aerogel composite material and the method can be applied to the field of electronic products with high requirements on thicknesses.

Description

Technical field [0001] The invention belongs to the field of aerogel materials, and particularly relates to an ultra-thin aerogel material prepared by using organic cloth and inorganic fiber surface felt as reinforcements. Background technique [0002] Aerogel super thermal insulation material is a new type of inorganic nano thermal insulation material, the main component is silica, and the nanometer-scale ultrafine particles aggregate each other to form a nanoporous network structure, and the network pores are filled with light weight of gaseous dispersion medium Nano solid materials. In terms of heat, the aerogel’s nanoporous structure can effectively inhibit solid heat conduction and gas heat transfer, and has excellent thermal insulation properties. It is currently recognized as the solid material with the lowest thermal conductivity (as low as 0.013W / (m·K at room temperature) )). [0003] The unique structure of aerogel gives it excellent thermal insulation performance, but ...

AI Technical Summary

Problems solved by technology

There are also studies on ultra-thin airgel composite materials in the prior art, such as patent CN201310247592.2-airgel paper, its preparation method and application, CN201310260138-a kind of airgel paperboard and its preparation method, all of which are silicon dioxide Airgel is combined with inorganic fiber paper, and the airgel paper is prepared by ethanol supercritical drying method. However, the strength of the inorganic fiber paper itself is very low, and it is easily damaged when unwinding and rewinding. Most of them exist in the form of cardboard, which is difficult to meet the rough Industrial construction requirements, no description of product qualification rate, thickness range 0.3mm-1.2mm

In addition, airgel paper cannot be applied to the field of clothing and accessories that have higher requirements for environmental protection of materials, and cannot be applied to the field of electronic products that have higher requirements for thickness, such as mobile phone heat insulation materials that require a thickness of 0.1mm

[0005] The thickness of conventional glass fiber needle felt airgel material is more than 3mm, and its flexibility is poor; the thickness of conventional inorganic fiber airgel material is more than 0.5mm, the optimal thickness is 0.3mm, and it is difficult to meet the rough industrial construction requirements, so it is prepared into a coil The pass rate is low and the flexibility is poor

It cannot be applied to the field of clothing and accessories that have higher requirements for environmental protection and flexibility of materials, and cannot be applied to the field of electronic products that have higher requirements for thickness