Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-temperature-resistant heat-insulating aerogel and preparation method thereof
The invention discloses high-temperature-resistant heat-insulating aerogel and a preparation method thereof, and belongs to the technical field of aerogel. The preparation method of the high-temperature-resistant heat-insulating aerogel comprises the following steps: firstly, adding L-phenylalanine and graphene oxide into deionized water, performing ultrasonic dispersion, adjusting the pH value, heating and stirring, cooling and dialyzing, and freeze-drying to obtain modified graphene oxide; mixing a silicon source, absolute ethyl alcohol and acid, and stirring at room temperature to obtain a precursor solution; dissolving the modified graphene oxide in absolute ethyl alcohol, performing ultrasonic dispersion, mixing with the precursor solution, adding alkali, and continuously stirring to obtain sol; pressing the fibers into a fiber prefabricated part; immersing the obtained fiber prefabricated member into the sol, vacuumizing and maintaining the pressure, and recovering to normal pressure to obtain a fiber and sol composite material; and finally, aging, drying and sintering the fiber and sol composite material to obtain the high-temperature-resistant heat-insulating aerogel.
本发明公开了一种耐高温隔热气凝胶及其制备方法，属于气凝胶技术领域。该耐高温隔热气凝胶的制备方法包括以下步骤：首先将L‑苯丙氨酸和氧化石墨烯加入去离子水中超声分散，调节pH，升温搅拌，冷却透析，冷冻干燥得到改性氧化石墨烯；再将硅源、无水乙醇和酸进行混合，室温下进行搅拌，得到前驱体溶液；然后将改性氧化石墨烯溶解在无水乙醇，超声分散后与前驱体溶液混合，加入碱继续搅拌，得到溶胶；将纤维压制成纤维预制件；再将所得纤维预制件浸入溶胶中，抽真空保压，恢复至常压，得到纤维与溶胶复合材料；最后将纤维与溶胶复合材料进行老化、干燥、烧结，得到耐高温隔热气凝胶。
High-temperature-resistant heat-insulating aerogel and preparation method thereof
The invention discloses high-temperature-resistant heat-insulating aerogel and a preparation method thereof, and belongs to the technical field of aerogel. The preparation method of the high-temperature-resistant heat-insulating aerogel comprises the following steps: firstly, adding L-phenylalanine and graphene oxide into deionized water, performing ultrasonic dispersion, adjusting the pH value, heating and stirring, cooling and dialyzing, and freeze-drying to obtain modified graphene oxide; mixing a silicon source, absolute ethyl alcohol and acid, and stirring at room temperature to obtain a precursor solution; dissolving the modified graphene oxide in absolute ethyl alcohol, performing ultrasonic dispersion, mixing with the precursor solution, adding alkali, and continuously stirring to obtain sol; pressing the fibers into a fiber prefabricated part; immersing the obtained fiber prefabricated member into the sol, vacuumizing and maintaining the pressure, and recovering to normal pressure to obtain a fiber and sol composite material; and finally, aging, drying and sintering the fiber and sol composite material to obtain the high-temperature-resistant heat-insulating aerogel.
本发明公开了一种耐高温隔热气凝胶及其制备方法，属于气凝胶技术领域。该耐高温隔热气凝胶的制备方法包括以下步骤：首先将L‑苯丙氨酸和氧化石墨烯加入去离子水中超声分散，调节pH，升温搅拌，冷却透析，冷冻干燥得到改性氧化石墨烯；再将硅源、无水乙醇和酸进行混合，室温下进行搅拌，得到前驱体溶液；然后将改性氧化石墨烯溶解在无水乙醇，超声分散后与前驱体溶液混合，加入碱继续搅拌，得到溶胶；将纤维压制成纤维预制件；再将所得纤维预制件浸入溶胶中，抽真空保压，恢复至常压，得到纤维与溶胶复合材料；最后将纤维与溶胶复合材料进行老化、干燥、烧结，得到耐高温隔热气凝胶。
High-temperature-resistant heat-insulating aerogel and preparation method thereof
一种耐高温隔热气凝胶及其制备方法
ZHANG LI (Autor:in) / MA XIAOFEI (Autor:in) / ZHANG ZHICHENG (Autor:in) / YUAN MENG (Autor:in) / YUAN BINGQIAN (Autor:in)
12.11.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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