Method for preparing insulation board with methyltrimethoxysilane as silicon source

Abstract

The invention discloses a method for preparing insulation board with methyltrimethoxysilane as a silicon source. The method comprises the steps of: first, weighing 8-10.5 parts of methyltrimethoxysilane, 2-4.5 parts of hexadecyl trimethyl ammonium chloride, 1-3.5 parts of acetic acid, 1-4.5 parts of urea and 1-3.5 parts of water; second, evenly stirring the raw materials, and then putting the materials together with glass fiber 5.7-30.8 wt% of the materials in a sealed container; and last controlling temperature of the sealing container at the 50-70 DEG C, drying under normal pressure for 24-30h, and then removing the dried insulation board from the container, soaking the insulation board in anhydrous methanol for 24-30 h, and air-drying to obtain a finished product. The insulation board prepared by the method provided by the invention can maintain good performance of silica aerogel and enhance mechanical properties of the silica aerogel; the insulation board has void ratio higher than 90%, pore size only tens of nanometers, pore volume no less than 2.4ml / g, thermal conductivity coefficient of 0.015-0.030w / m.K, super hydrophobicity, and fireproof grade reaching A1.

Description

technical field [0001] The invention relates to a silica airgel composite material, in particular to a method for preparing a thermal insulation board prepared from the silica airgel and glass fiber composite material. Background technique [0002] Silica airgel is a new type of nanoporous inorganic material with high porosity (80%-99.8%), low density (0.03-0.3g / cm 3 ), low thermal conductivity (0.013-0.018 w / m k), low dielectric constant (1.0-2.0) and other superior properties, and the performance can be continuously adjustable with the control of the structure. Environmental protection, medicine, catalysis, building energy saving, petrochemical industry, aerospace and other fields have broad application prospects, and have been used as heat insulation materials, catalysts and carriers, acoustic impedance lotus and other materials. At present, domestic manufacturers adopt the traditional method of preparing silica airgel with tetraethyl orthosilicate as the silicon source ...

AI Technical Summary

Problems solved by technology

The above-mentioned methods all adopt the atmospheric pressure drying process on the processing conditions, which reduces the production cost and is beneficial to industrialized production, but their production processes are still relatively complicated and need further improvement