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Phase change microcapsule composite aluminum trioxide-silicon dioxide aerogel and preparation method thereof
The invention provides a phase change microcapsule composite aluminum trioxide-silicon dioxide aerogel and a preparation method thereof. The method comprises the following steps of: hydrolyzing silicon dioxide sol and Al2O3 sol for 1-5h, dropwise adding the silicon dioxide sol into the Al2O3 sol, performing mechanical stirring at room temperature for 8-26h to obtain Al2O3-SiO2 mixed sol, adding fibers and phase change microcapsules into the Al2O3-SiO2 mixed sol, mechanically stirring the substances uniformly at room temperature, then adding a sol polymerization accelerator for gelatinization to obtain phase change microcapsule composite Al2O3-SiO2 gel, soaking the phase change microcapsule composite Al2O3-SiO2 gel into an anhydrous ethanol solution for aging for 10-40h, then performing soaking into a hydrophobic modifier, and finally drying the phase change microcapsule composite Al2O3-SiO2 gel under normal temperature and normal pressure for 10-40h, and conducting drying for 3-15h atthe temperature of 36-85DEG C to obtain the phase change microcapsule composite Al2O3-SiO2 aerogel. The heat insulation characteristic of the aerogel is not changed, and meanwhile, the heat storage function is added, so that the heat preservation and insulation efficiency and the energy utilization rate of the silicon-based aerogel composite material are improved.
本发明提供一种相变微胶囊复合三氧化铝—二氧化硅气凝胶及其制备方法，将二氧化硅溶胶和Al2O3溶胶水解1‑5h后，将二氧化硅溶胶逐滴加入Al2O3溶胶中，室温条件下机械搅拌8‑26h后，得到Al2O3‑SiO2混合溶胶，再向上述Al2O3‑SiO2混合溶胶中加入纤维及相变微胶囊，室温条件下机械搅拌均匀后，再加入溶胶聚合促进剂发生凝胶化后，即得到相变微胶囊复合Al2O3‑SiO2凝胶，将相变微胶囊复合Al2O3‑SiO2凝胶浸在无水乙醇溶液中老化10‑40h后，再浸入疏水改性剂中，最后将相变微胶囊复合Al2O3‑SiO2凝胶在常温常压下干燥10‑40h，在36‑85℃下干燥3‑15h后，即得到相变微胶囊复合Al2O3‑SiO2气凝胶。在不改变气凝胶自身隔热特性的同时，增加基蓄热功能，从而提高硅基气凝胶复合材料的保温隔热效率及能源利用率。
Phase change microcapsule composite aluminum trioxide-silicon dioxide aerogel and preparation method thereof
The invention provides a phase change microcapsule composite aluminum trioxide-silicon dioxide aerogel and a preparation method thereof. The method comprises the following steps of: hydrolyzing silicon dioxide sol and Al2O3 sol for 1-5h, dropwise adding the silicon dioxide sol into the Al2O3 sol, performing mechanical stirring at room temperature for 8-26h to obtain Al2O3-SiO2 mixed sol, adding fibers and phase change microcapsules into the Al2O3-SiO2 mixed sol, mechanically stirring the substances uniformly at room temperature, then adding a sol polymerization accelerator for gelatinization to obtain phase change microcapsule composite Al2O3-SiO2 gel, soaking the phase change microcapsule composite Al2O3-SiO2 gel into an anhydrous ethanol solution for aging for 10-40h, then performing soaking into a hydrophobic modifier, and finally drying the phase change microcapsule composite Al2O3-SiO2 gel under normal temperature and normal pressure for 10-40h, and conducting drying for 3-15h atthe temperature of 36-85DEG C to obtain the phase change microcapsule composite Al2O3-SiO2 aerogel. The heat insulation characteristic of the aerogel is not changed, and meanwhile, the heat storage function is added, so that the heat preservation and insulation efficiency and the energy utilization rate of the silicon-based aerogel composite material are improved.
本发明提供一种相变微胶囊复合三氧化铝—二氧化硅气凝胶及其制备方法，将二氧化硅溶胶和Al2O3溶胶水解1‑5h后，将二氧化硅溶胶逐滴加入Al2O3溶胶中，室温条件下机械搅拌8‑26h后，得到Al2O3‑SiO2混合溶胶，再向上述Al2O3‑SiO2混合溶胶中加入纤维及相变微胶囊，室温条件下机械搅拌均匀后，再加入溶胶聚合促进剂发生凝胶化后，即得到相变微胶囊复合Al2O3‑SiO2凝胶，将相变微胶囊复合Al2O3‑SiO2凝胶浸在无水乙醇溶液中老化10‑40h后，再浸入疏水改性剂中，最后将相变微胶囊复合Al2O3‑SiO2凝胶在常温常压下干燥10‑40h，在36‑85℃下干燥3‑15h后，即得到相变微胶囊复合Al2O3‑SiO2气凝胶。在不改变气凝胶自身隔热特性的同时，增加基蓄热功能，从而提高硅基气凝胶复合材料的保温隔热效率及能源利用率。
Phase change microcapsule composite aluminum trioxide-silicon dioxide aerogel and preparation method thereof
一种相变微胶囊复合三氧化铝—二氧化硅气凝胶及其制备方法
ZHANG YITING (author) / LI JING (author) / LIU HONGLI (author) / LI YAJING (author) / LI HONGYAN (author) / YANG JIANQI (author) / TANG QIUYU (author)
2021-02-23
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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