Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention discloses a SiO2 aerogel composite material, a composite board containing the SiO2 aerogel composite material and preparation and application of the SiO2 aerogel composite material. The preparation method of the SiO2 aerogel composite material comprises the following steps: carrying out hydrolysis reaction on a silicon source, an organic solvent, water and an acidic catalyst, cooling to room temperature, adjusting the pH value to 8-8.5, and carrying out condensation polymerization to prepare SiO2 sol; the preparation method comprises the following steps: soaking rock wool short fibers in a hydroxyl-containing polar organic solvent, and performing ultrasonic treatment and drying to obtain activated rock wool short fibers; the preparation method comprises the following steps: mixing 1 part of SiO2 sol and 10-25 parts of activated rock wool short fibers, sealing and storing, carrying out thermal aging and polar solvent aging, and sequentially carrying out solvent replacement, surface hydrophobic modification, washing and normal-pressure drying by using a polar organic solvent and a non-polar organic solvent to prepare the SiO2 aerogel composite material. The SiO2 aerogel composite material and the composite board prepared by the invention have the advantages of lower heat conductivity coefficient, difficulty in cracking and slag falling, more excellent mechanical property, energy conservation, emission reduction and cost reduction.
本申请公开一种SiO2气凝胶复合材料、含其复合板及其制备和应用。SiO2气凝胶复合材料的制备包括如下步骤：硅源、有机溶剂、水和酸性催化剂经水解反应，冷却至室温，调节pH值至8～8.5，经缩聚反应，制得SiO2溶胶；岩棉短纤维浸泡在含羟基极性有机溶剂中，超声，干燥，制得活化岩棉短纤维；将1份SiO2溶胶和10～25份活化岩棉短纤维混合，密封保存，经热老化和极性溶剂老化，再依次用极性有机溶剂和非极性有机溶剂进行溶剂置换，表面疏水改性，洗涤和常压干燥，制得SiO2气凝胶复合材料。本申请制得的SiO2气凝胶复合材料和复合板具有较低的导热系数，不易开裂掉渣，力学性能更优异，节能减排，降低成本。
The invention discloses a SiO2 aerogel composite material, a composite board containing the SiO2 aerogel composite material and preparation and application of the SiO2 aerogel composite material. The preparation method of the SiO2 aerogel composite material comprises the following steps: carrying out hydrolysis reaction on a silicon source, an organic solvent, water and an acidic catalyst, cooling to room temperature, adjusting the pH value to 8-8.5, and carrying out condensation polymerization to prepare SiO2 sol; the preparation method comprises the following steps: soaking rock wool short fibers in a hydroxyl-containing polar organic solvent, and performing ultrasonic treatment and drying to obtain activated rock wool short fibers; the preparation method comprises the following steps: mixing 1 part of SiO2 sol and 10-25 parts of activated rock wool short fibers, sealing and storing, carrying out thermal aging and polar solvent aging, and sequentially carrying out solvent replacement, surface hydrophobic modification, washing and normal-pressure drying by using a polar organic solvent and a non-polar organic solvent to prepare the SiO2 aerogel composite material. The SiO2 aerogel composite material and the composite board prepared by the invention have the advantages of lower heat conductivity coefficient, difficulty in cracking and slag falling, more excellent mechanical property, energy conservation, emission reduction and cost reduction.
本申请公开一种SiO2气凝胶复合材料、含其复合板及其制备和应用。SiO2气凝胶复合材料的制备包括如下步骤：硅源、有机溶剂、水和酸性催化剂经水解反应，冷却至室温，调节pH值至8～8.5，经缩聚反应，制得SiO2溶胶；岩棉短纤维浸泡在含羟基极性有机溶剂中，超声，干燥，制得活化岩棉短纤维；将1份SiO2溶胶和10～25份活化岩棉短纤维混合，密封保存，经热老化和极性溶剂老化，再依次用极性有机溶剂和非极性有机溶剂进行溶剂置换，表面疏水改性，洗涤和常压干燥，制得SiO2气凝胶复合材料。本申请制得的SiO2气凝胶复合材料和复合板具有较低的导热系数，不易开裂掉渣，力学性能更优异，节能减排，降低成本。
SiO2 aerogel composite material, composite board containing SiO2 aerogel composite material as well as preparation and application of SiO2 aerogel composite material
SiO2气凝胶复合材料、含其复合板及其制备和应用
08.08.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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