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Ultralow-density aerogel with continuous density change characteristic and preparation method thereof
The invention relates to ultralow-density aerogel with a continuous density change characteristic and a preparation method of the ultralow-density aerogel. The method comprises the following steps: uniformly mixing estersil, an alcohol solvent and an acid catalyst, sequentially carrying out heating reflux and distillation treatment to obtain a reaction solution, and diluting the reaction solution with an organic solvent to obtain a silicon source precursor; adding a catalyst into the silicon source precursor, and uniformly stirring at ambient temperature to obtain reactive sol; respectively pumping the reactive sol and the organic solvent into a forming mold according to a set flow rate by virtue of a plurality of peristaltic pumps, so as to prepare wet gel; the wet gel is sequentially subjected to heating aging, solvent replacement and supercritical drying, and the ultralow-density aerogel is prepared. The ultra-low-density aerogel material has good light transmission, the density distribution in the thickness direction is 50 +/-5 kg/m < 3 > to 20 +/-5 kg/m < 3 >, the density change has continuity, and the ultra-low-density aerogel material is an ideal material used in the fields of deep space high-speed particle capture, organic adsorption and the like.
本发明涉及一种具有连续密度变化特性的超低密度气凝胶及其制备方法。所述方法：将硅酯、醇溶剂和酸催化剂混合均匀后依次进行加热回流和蒸馏处理，得到反应溶液，然后用有机溶剂对反应溶液进行稀释，得到硅源前驱体；往硅源前驱体中加入催化剂并在环境温度下搅拌均匀，得到反应性溶胶；通过多台蠕动泵分别将反应性溶胶与有机溶剂按照设定的流量抽取至成型模具内，制得湿凝胶；将湿凝胶依次进行加热老化、溶剂置换和超临界干燥，制得所述超低密度气凝胶。本发明中的超低密度气凝胶材料具有良好的透光性，在厚度方向上密度分布介于50±5kg/m3～20±5kg/m3，密度变化具有连续性，是用于深空高速粒子捕获、有机吸附等领域的理想材料。
Ultralow-density aerogel with continuous density change characteristic and preparation method thereof
The invention relates to ultralow-density aerogel with a continuous density change characteristic and a preparation method of the ultralow-density aerogel. The method comprises the following steps: uniformly mixing estersil, an alcohol solvent and an acid catalyst, sequentially carrying out heating reflux and distillation treatment to obtain a reaction solution, and diluting the reaction solution with an organic solvent to obtain a silicon source precursor; adding a catalyst into the silicon source precursor, and uniformly stirring at ambient temperature to obtain reactive sol; respectively pumping the reactive sol and the organic solvent into a forming mold according to a set flow rate by virtue of a plurality of peristaltic pumps, so as to prepare wet gel; the wet gel is sequentially subjected to heating aging, solvent replacement and supercritical drying, and the ultralow-density aerogel is prepared. The ultra-low-density aerogel material has good light transmission, the density distribution in the thickness direction is 50 +/-5 kg/m < 3 > to 20 +/-5 kg/m < 3 >, the density change has continuity, and the ultra-low-density aerogel material is an ideal material used in the fields of deep space high-speed particle capture, organic adsorption and the like.
本发明涉及一种具有连续密度变化特性的超低密度气凝胶及其制备方法。所述方法：将硅酯、醇溶剂和酸催化剂混合均匀后依次进行加热回流和蒸馏处理，得到反应溶液，然后用有机溶剂对反应溶液进行稀释，得到硅源前驱体；往硅源前驱体中加入催化剂并在环境温度下搅拌均匀，得到反应性溶胶；通过多台蠕动泵分别将反应性溶胶与有机溶剂按照设定的流量抽取至成型模具内，制得湿凝胶；将湿凝胶依次进行加热老化、溶剂置换和超临界干燥，制得所述超低密度气凝胶。本发明中的超低密度气凝胶材料具有良好的透光性，在厚度方向上密度分布介于50±5kg/m3～20±5kg/m3，密度变化具有连续性，是用于深空高速粒子捕获、有机吸附等领域的理想材料。
Ultralow-density aerogel with continuous density change characteristic and preparation method thereof
一种具有连续密度变化特性的超低密度气凝胶及其制备方法
LI JIAN (author) / ZHANG LIJUAN (author) / ZHANG ENSHUANG (author) / GAO YUZHI (author) / LEI CHAOSHUAI (author) / LIU YUANYUAN (author) / LIU XIAOBO (author) / LI WENJING (author) / ZHAO YINGMIN (author)
2022-05-06
Patent
Electronic Resource
Chinese
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