Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Silicon-aluminum sol cross-linked silicon dioxide nanofiber aerogel and preparation method thereof
The invention provides silicon-aluminum sol cross-linked silicon dioxide nanofiber aerogel and a preparation method thereof, and belongs to the technical field of high-temperature-resistant thermal insulation materials. The preparation method comprises the following steps: hydrolyzing aluminum salt to obtain aluminum hydroxide sol, mixing a silicon source, absolute ethyl alcohol, hydrochloric acid and water, hydrolyzing to obtain silicon dilute sol, mixing the aluminum hydroxide sol and the silicon dilute sol to obtain silicon-aluminum sol, and finally mixing silicon dioxide nanofiber, the silicon-aluminum sol and tert-butyl alcohol to obtain the composite material. And sequentially carrying out first freeze drying and second freeze drying on the obtained nano dispersion liquid to obtain the silica-alumina sol cross-linked silica nanofiber aerogel. According to the silica-alumina sol cross-linked silica nanofiber aerogel prepared by the preparation method disclosed by the invention, the phase change of alumina under a high-temperature condition is inhibited, and the high-temperature resistance of the silica nanofiber aerogel is improved.
本发明提供了一种硅铝溶胶交联的二氧化硅纳米纤维气凝胶及其制备方法，属于耐高温隔热材料技术领域。本发明首先将铝盐水解，得到氢氧化铝溶胶，将硅源、无水乙醇、盐酸和水混合后进行水解，得到硅稀溶胶，然后将氢氧化铝溶胶和硅稀溶胶混合，得到硅铝溶胶，最后将二氧化硅纳米纤维、硅铝溶胶和叔丁醇混合，得到的纳米分散液顺次进行第一次冷冻干燥和第二次冷冻干燥，得到硅铝溶胶交联的二氧化硅纳米纤维气凝胶。本发明制得的硅铝溶胶交联的二氧化硅纳米纤维气凝胶抑制了氧化铝在高温条件下发生相变，并且提高了二氧化硅纳米纤维气凝胶的耐高温性能。
Silicon-aluminum sol cross-linked silicon dioxide nanofiber aerogel and preparation method thereof
The invention provides silicon-aluminum sol cross-linked silicon dioxide nanofiber aerogel and a preparation method thereof, and belongs to the technical field of high-temperature-resistant thermal insulation materials. The preparation method comprises the following steps: hydrolyzing aluminum salt to obtain aluminum hydroxide sol, mixing a silicon source, absolute ethyl alcohol, hydrochloric acid and water, hydrolyzing to obtain silicon dilute sol, mixing the aluminum hydroxide sol and the silicon dilute sol to obtain silicon-aluminum sol, and finally mixing silicon dioxide nanofiber, the silicon-aluminum sol and tert-butyl alcohol to obtain the composite material. And sequentially carrying out first freeze drying and second freeze drying on the obtained nano dispersion liquid to obtain the silica-alumina sol cross-linked silica nanofiber aerogel. According to the silica-alumina sol cross-linked silica nanofiber aerogel prepared by the preparation method disclosed by the invention, the phase change of alumina under a high-temperature condition is inhibited, and the high-temperature resistance of the silica nanofiber aerogel is improved.
本发明提供了一种硅铝溶胶交联的二氧化硅纳米纤维气凝胶及其制备方法，属于耐高温隔热材料技术领域。本发明首先将铝盐水解，得到氢氧化铝溶胶，将硅源、无水乙醇、盐酸和水混合后进行水解，得到硅稀溶胶，然后将氢氧化铝溶胶和硅稀溶胶混合，得到硅铝溶胶，最后将二氧化硅纳米纤维、硅铝溶胶和叔丁醇混合，得到的纳米分散液顺次进行第一次冷冻干燥和第二次冷冻干燥，得到硅铝溶胶交联的二氧化硅纳米纤维气凝胶。本发明制得的硅铝溶胶交联的二氧化硅纳米纤维气凝胶抑制了氧化铝在高温条件下发生相变，并且提高了二氧化硅纳米纤维气凝胶的耐高温性能。
Silicon-aluminum sol cross-linked silicon dioxide nanofiber aerogel and preparation method thereof
一种硅铝溶胶交联的二氧化硅纳米纤维气凝胶及其制备方法
LI SHOUZHU (Autor:in) / YUE ZIXIN (Autor:in) / ZENG XIN (Autor:in) / ZHUANG SHUTING (Autor:in)
20.09.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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