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Alumina-carbon composite nanofiber aerogel material and preparation method thereof
The invention relates to an alumina-carbon composite nanofiber aerogel material and a preparation method thereof.The method comprises the steps that alumina nano powder and a sulfuric acid solution are evenly mixed with water, a mixed solution is obtained, then the mixed solution is placed at the temperature of 150-300 DEG C for a hydrothermal reaction for 12-18 h, and gel is obtained; aging the gel to obtain aged gel; carrying out solvent replacement on the aged gel by adopting DMSO (Dimethylsulfoxide) as a solvent; soaking the gel subjected to solvent replacement in a Kevlar nanofiber dispersion liquid for 24 to 96 hours; sequentially carrying out solvent replacement and supercritical drying on the impregnated gel, so as to prepare an aluminum oxide-Kevlar nanofiber aerogel material; and carrying out high-temperature cracking on the aluminum oxide-Kevlar nanofiber aerogel material, so as to prepare the aluminum oxide-carbon composite nanofiber aerogel material. The aluminum oxide-carbon composite nanofiber aerogel material which is good in temperature resistance, tough, low in density, efficient in heat insulation and resistant to radiation is obtained.
本发明涉及一种氧化铝‑碳复合纳米纤维气凝胶材料及其制备方法，所述方法为：用水将氧化铝纳米粉和硫酸溶液混合均匀，得到混合液，然后将所述混合液置于150～300℃下水热反应12～18h，得到凝胶；将凝胶进行老化，得到老化凝胶；将老化凝胶采用DMSO作为溶剂进行溶剂置换；将溶剂置换后的凝胶浸渍在凯夫拉纳米纤维分散液中24～96h；将浸渍后的凝胶依次进行溶剂置换和超临界干燥，制得氧化铝‑凯夫拉纳米纤维气凝胶材料；将所述氧化铝‑凯夫拉纳米纤维气凝胶材料进行高温裂解，制得氧化铝‑碳复合纳米纤维气凝胶材料。本发明得到了一种耐温性佳、强韧、低密度、高效隔热且抗辐射的氧化铝‑碳复合纳米纤维气凝胶材料。
Alumina-carbon composite nanofiber aerogel material and preparation method thereof
The invention relates to an alumina-carbon composite nanofiber aerogel material and a preparation method thereof.The method comprises the steps that alumina nano powder and a sulfuric acid solution are evenly mixed with water, a mixed solution is obtained, then the mixed solution is placed at the temperature of 150-300 DEG C for a hydrothermal reaction for 12-18 h, and gel is obtained; aging the gel to obtain aged gel; carrying out solvent replacement on the aged gel by adopting DMSO (Dimethylsulfoxide) as a solvent; soaking the gel subjected to solvent replacement in a Kevlar nanofiber dispersion liquid for 24 to 96 hours; sequentially carrying out solvent replacement and supercritical drying on the impregnated gel, so as to prepare an aluminum oxide-Kevlar nanofiber aerogel material; and carrying out high-temperature cracking on the aluminum oxide-Kevlar nanofiber aerogel material, so as to prepare the aluminum oxide-carbon composite nanofiber aerogel material. The aluminum oxide-carbon composite nanofiber aerogel material which is good in temperature resistance, tough, low in density, efficient in heat insulation and resistant to radiation is obtained.
本发明涉及一种氧化铝‑碳复合纳米纤维气凝胶材料及其制备方法，所述方法为：用水将氧化铝纳米粉和硫酸溶液混合均匀，得到混合液，然后将所述混合液置于150～300℃下水热反应12～18h，得到凝胶；将凝胶进行老化，得到老化凝胶；将老化凝胶采用DMSO作为溶剂进行溶剂置换；将溶剂置换后的凝胶浸渍在凯夫拉纳米纤维分散液中24～96h；将浸渍后的凝胶依次进行溶剂置换和超临界干燥，制得氧化铝‑凯夫拉纳米纤维气凝胶材料；将所述氧化铝‑凯夫拉纳米纤维气凝胶材料进行高温裂解，制得氧化铝‑碳复合纳米纤维气凝胶材料。本发明得到了一种耐温性佳、强韧、低密度、高效隔热且抗辐射的氧化铝‑碳复合纳米纤维气凝胶材料。
Alumina-carbon composite nanofiber aerogel material and preparation method thereof
一种氧化铝-碳复合纳米纤维气凝胶材料及其制备方法
ZHANG ENSHUANG (author) / LI WENJING (author) / XU PEI (author) / WANG ZINING (author) / LIU TAO (author) / ZHANG HAO (author) / ZHANG FAN (author)
2022-08-05
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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