Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Controllable preparation method of silicon oxide aerogel composite material
The invention belongs to the technical field of gel composite materials, and particularly relates to a controllable preparation method of a silicon oxide aerogel composite material, which comprises the following steps: 1, taking tetraethoxysilane (TEOS) and deionized water (H2O) as raw materials, ethanol (EtOH) as a solvent, and hydrochloric acid (HCl) and ammonia water as catalysts; under the alkaline condition, hydrolysis products are promoted to be subjected to polycondensation; 3, mixing the SiO2 silica sol with the fiber preform to obtain SiO2 sol containing the fiber preform, and converting the SiO2 sol of the fiber preform into SiO2 gel of the fiber preform under the action of gel; 4, supercritical drying is conducted, a fiber/aerogel composite material is obtained, finally, the nano-porous SiO2 aerogel composite material is obtained through treatment, the structure is reasonable, and the nano-porous SiO2 aerogel composite material is a tip product in the field of energy-saving materials, contributes to energy conservation and emission reduction and assists in achieving carbon peak reaching and carbon neutralization.
本发明属于凝胶复合材料技术领域，具体为氧化硅气凝胶复合材料的可控制备方法，包括步骤1：以正硅酸乙酯(TEOS)、去离子水(H2O)为原料，乙醇(EtOH)为溶剂，盐酸(HCl)、氨水为催化剂：步骤2：采用酸/碱两步法制备SiO2溶胶，即在酸性条件下促进正硅酸乙酯水解，在碱性条件下促进水解产物缩聚；步骤3：然后，SiO2硅溶胶和纤维预制件混合得到含纤维预制件的SiO2溶胶，在凝胶作用下纤维预制件的SiO2溶胶转化为纤维预制件的SiO2凝胶；步骤4：再经过超临界干燥得到纤维/气凝胶复合材料，最后经过处理得到纳米多孔SiO2气凝胶复合材料，其结构合理，纳米多孔SiO2气凝胶复合材料是节能材料领域的尖端产品，为节能减排作出贡献并助力实现碳达峰、碳中和。
Controllable preparation method of silicon oxide aerogel composite material
The invention belongs to the technical field of gel composite materials, and particularly relates to a controllable preparation method of a silicon oxide aerogel composite material, which comprises the following steps: 1, taking tetraethoxysilane (TEOS) and deionized water (H2O) as raw materials, ethanol (EtOH) as a solvent, and hydrochloric acid (HCl) and ammonia water as catalysts; under the alkaline condition, hydrolysis products are promoted to be subjected to polycondensation; 3, mixing the SiO2 silica sol with the fiber preform to obtain SiO2 sol containing the fiber preform, and converting the SiO2 sol of the fiber preform into SiO2 gel of the fiber preform under the action of gel; 4, supercritical drying is conducted, a fiber/aerogel composite material is obtained, finally, the nano-porous SiO2 aerogel composite material is obtained through treatment, the structure is reasonable, and the nano-porous SiO2 aerogel composite material is a tip product in the field of energy-saving materials, contributes to energy conservation and emission reduction and assists in achieving carbon peak reaching and carbon neutralization.
本发明属于凝胶复合材料技术领域，具体为氧化硅气凝胶复合材料的可控制备方法，包括步骤1：以正硅酸乙酯(TEOS)、去离子水(H2O)为原料，乙醇(EtOH)为溶剂，盐酸(HCl)、氨水为催化剂：步骤2：采用酸/碱两步法制备SiO2溶胶，即在酸性条件下促进正硅酸乙酯水解，在碱性条件下促进水解产物缩聚；步骤3：然后，SiO2硅溶胶和纤维预制件混合得到含纤维预制件的SiO2溶胶，在凝胶作用下纤维预制件的SiO2溶胶转化为纤维预制件的SiO2凝胶；步骤4：再经过超临界干燥得到纤维/气凝胶复合材料，最后经过处理得到纳米多孔SiO2气凝胶复合材料，其结构合理，纳米多孔SiO2气凝胶复合材料是节能材料领域的尖端产品，为节能减排作出贡献并助力实现碳达峰、碳中和。
Controllable preparation method of silicon oxide aerogel composite material
氧化硅气凝胶复合材料的可控制备方法
BAI YUANYU (Autor:in) / ZHU LIWEI (Autor:in) / CHEN DIXIN (Autor:in) / DENG YUNLONG (Autor:in)
11.04.2023
Patent
Elektronische Ressource
Chinesisch
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