Glass fiber mat-reinforced silica aerogel and preparation method thereof

Abstract

The invention discloses glass fiber mat-reinforced silica aerogel and a preparation method thereof. The glass fiber mat-reinforced silica aerogel comprises, by weight, 40-70 parts of a glass fiber mat, 4-30 parts of a silica aerogel solution, 2-10 parts of a modifier and 0.5-1 part of a water soluble phenol-formaldehyde resin solution. The preparation method comprises 1, sol solution preparation, 2, mixed solution preparation, 3, glass fiber cotton mat preparation, 4, glass fiber and mixed solution mixing, 5, aging and 6, aging. The glass fiber mat-reinforced silica aerogel improves silica aerogel toughness and strength, has flexible treatment aging and drying processes so that aerogel continuous production is realized, has excellent adsorbability, is soft and has good hydrophobicity.

Description

technical field [0001] The invention relates to an airgel material and a preparation method thereof, in particular to a glass fiber mat reinforced silica airgel and a preparation method thereof. Background technique [0002] Silica airgel is a light nanoporous amorphous solid material with controllable structure, its porosity is as high as 80%-99.8%, the pore size is 1-100nm, and the high specific surface area is 200-1000m 2 / g, low density change range 3~500kg / m 3 , The thermal conductivity at normal temperature and pressure is less than 0.013W / mK, which is lower than that of still air (0.026W / mK), and it is the solid material with the lowest thermal conductivity at present. [0003] At present, scholars and enterprises at home and abroad have conducted extensive research on the preparation and application of aerogels. Silicon dioxide aerogels can be formed by using organic silicon as a silicon source, using a melt-gel process, and drying. However, due to the extremely lo...

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the problems of poor toughness of airgel and long production cycle, and overcome the problem of poor toughness of a single airgel by using low-density glass wool felt of oil spray adhesive as the airgel carrier And the problem that the structure of the single glass fiber reinforced phase is difficult to fix, and through the design of the parallel movable mold and variable track preparation scheme, the production process of glass fiber mat reinforced silica airgel does not need to wait for several days for air condensation The gel is aged and dried, but only by changing the mold, the vacant equipment is connected to the production line to continue production, and the gel-forming mold is sent to the vacant next-level equipment, making continuous production possible

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