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Spinel structure high-temperature-resistant aerogel thermal insulation material and preparation method thereof
The invention relates to a spinel-structured high-temperature-resistant aerogel thermal insulation material and a preparation method thereof. The method comprises the following steps: uniformly dispersing nano aluminum oxide sol and nano magnesium oxide with water to obtain dispersion liquid, then adding a structure modulating agent and a mineralizing agent into the dispersion liquid, and carrying out hydrothermal reaction to obtain composite precursor sol; adding polyoxyethylene into the composite precursor sol, and uniformly mixing to obtain steeping liquor; placing a zirconium oxide nanofiber membrane in the impregnation liquid for impregnation and swelling to obtain an impregnation and swelling nanofiber membrane; and superposing a plurality of impregnated and swollen nanofiber membranes layer by layer, then carrying out liquid nitrogen pre-freezing and freeze drying, and then carrying out high-temperature calcination to prepare the spinel-structure high-temperature-resistant aerogel heat-insulating material. The temperature resistance of the oxide aerogel can be improved, the pore structure of the material is effectively regulated and controlled, the heat conductivity is reduced, meanwhile, the structural strength of the material is also improved through the synchronous shrinkage scheme, and a good foundation is laid for application of the magnesium aluminate spinel aerogel composite heat insulation material.
本发明涉及一种尖晶石结构耐高温气凝胶隔热材料及其制备方法。所述方法包括：用水将纳米氧化铝溶胶和纳米氧化镁分散均匀，得到分散液，然后往分散液中加入结构调变剂和矿化剂并进行水热反应，得到复合前驱体溶胶；往复合前驱体溶胶中加入聚氧化乙烯并混合均匀，得到浸渍液；将氧化锆纳米纤维膜置于所述浸渍液中进行浸渍溶胀，得到浸渍溶胀纳米纤维膜；将多个浸渍溶胀纳米纤维膜逐层叠加后进行液氮预冷冻和冷冻干燥，再经高温煅烧，制得尖晶石结构耐高温气凝胶隔热材料。本发明可提升氧化物气凝胶的耐温性，有效调控材料孔结构，降低热导率，同时同步收缩的方案也提升了材料的结构强度，为镁铝尖晶石气凝胶复合隔热材料的应用奠定了很好的基础。
Spinel structure high-temperature-resistant aerogel thermal insulation material and preparation method thereof
The invention relates to a spinel-structured high-temperature-resistant aerogel thermal insulation material and a preparation method thereof. The method comprises the following steps: uniformly dispersing nano aluminum oxide sol and nano magnesium oxide with water to obtain dispersion liquid, then adding a structure modulating agent and a mineralizing agent into the dispersion liquid, and carrying out hydrothermal reaction to obtain composite precursor sol; adding polyoxyethylene into the composite precursor sol, and uniformly mixing to obtain steeping liquor; placing a zirconium oxide nanofiber membrane in the impregnation liquid for impregnation and swelling to obtain an impregnation and swelling nanofiber membrane; and superposing a plurality of impregnated and swollen nanofiber membranes layer by layer, then carrying out liquid nitrogen pre-freezing and freeze drying, and then carrying out high-temperature calcination to prepare the spinel-structure high-temperature-resistant aerogel heat-insulating material. The temperature resistance of the oxide aerogel can be improved, the pore structure of the material is effectively regulated and controlled, the heat conductivity is reduced, meanwhile, the structural strength of the material is also improved through the synchronous shrinkage scheme, and a good foundation is laid for application of the magnesium aluminate spinel aerogel composite heat insulation material.
本发明涉及一种尖晶石结构耐高温气凝胶隔热材料及其制备方法。所述方法包括：用水将纳米氧化铝溶胶和纳米氧化镁分散均匀，得到分散液，然后往分散液中加入结构调变剂和矿化剂并进行水热反应，得到复合前驱体溶胶；往复合前驱体溶胶中加入聚氧化乙烯并混合均匀，得到浸渍液；将氧化锆纳米纤维膜置于所述浸渍液中进行浸渍溶胀，得到浸渍溶胀纳米纤维膜；将多个浸渍溶胀纳米纤维膜逐层叠加后进行液氮预冷冻和冷冻干燥，再经高温煅烧，制得尖晶石结构耐高温气凝胶隔热材料。本发明可提升氧化物气凝胶的耐温性，有效调控材料孔结构，降低热导率，同时同步收缩的方案也提升了材料的结构强度，为镁铝尖晶石气凝胶复合隔热材料的应用奠定了很好的基础。
Spinel structure high-temperature-resistant aerogel thermal insulation material and preparation method thereof
一种尖晶石结构耐高温气凝胶隔热材料及其制备方法
REN ZHONGQI (author) / TU YUMING (author)
2024-11-05
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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