Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Phase-change composite aerogel and preparation method thereof
The invention provides a phase-change composite aerogel and a preparation method thereof. The preparation method comprises the steps of: mixing a silicon source 1 and a silicon source 2 and then dissolving the mixture in an aqueous solution of ethyl alcohol, performing mechanical stirring at room temperature till uniform mixing, then adding an acid catalyst into dispersion liquid, and adjusting the pH of the dispersion liquid to be 1-3, thus obtaining a silicon dioxide sol; adding a basic catalyst into the silicon dioxide sol prepared in the step 1, adjusting the pH value of the silicon dioxide sol to 7-10, adding phase-change microcapsules and fibers into the sol, performing mechanical stirring at room temperature until the materials are uniformly mixed, pouring the mixed sol into a mold,conducting standing to obtain wet gel, removing the wet gel from the mold, performing soaking in an anhydrous ethanol solution, performing aging for 10-40h, and finally conducting drying at 25-65DEGC for 20-30h to obtain the phase-change composite aerogel. The phase-change microcapsules are loaded in the silicon dioxide aerogel, and the nanofibers with good heat-conducting property are added toenhance the heat-conducting property of the aerogel skeleton, so that the phase-change microcapsules and the silicon dioxide aerogel are optimized.
本发明提供一种相变复合气凝胶及其制备方法，将硅源1和硅源2混合后溶于乙醇的水溶液中，室温条件下机械搅拌至混合均匀，再向上述分散液中加入酸性催化剂，调节分散液的pH至1‑3后，得到二氧化硅溶胶，向上述步骤1制备得到的二氧化硅溶胶中加入碱性催化剂，将二氧化硅溶胶pH至7‑10，再向上述溶胶中加入相变微胶囊和纤维，室温条件下机械搅拌至混合均匀后，将上述混合溶胶倒入模具中静置得到湿凝胶后，将上述湿凝胶从模具中脱出浸在无水乙醇溶液中老化10‑40h，最后置于25‑65℃下干燥20‑30h后，得到相变复合气凝胶。将相变微胶囊负载于二氧化硅气凝胶中，通过添加导热性能良好的纳米纤维，增强气凝胶骨架的导热性能，使二者达到最优化。
Phase-change composite aerogel and preparation method thereof
The invention provides a phase-change composite aerogel and a preparation method thereof. The preparation method comprises the steps of: mixing a silicon source 1 and a silicon source 2 and then dissolving the mixture in an aqueous solution of ethyl alcohol, performing mechanical stirring at room temperature till uniform mixing, then adding an acid catalyst into dispersion liquid, and adjusting the pH of the dispersion liquid to be 1-3, thus obtaining a silicon dioxide sol; adding a basic catalyst into the silicon dioxide sol prepared in the step 1, adjusting the pH value of the silicon dioxide sol to 7-10, adding phase-change microcapsules and fibers into the sol, performing mechanical stirring at room temperature until the materials are uniformly mixed, pouring the mixed sol into a mold,conducting standing to obtain wet gel, removing the wet gel from the mold, performing soaking in an anhydrous ethanol solution, performing aging for 10-40h, and finally conducting drying at 25-65DEGC for 20-30h to obtain the phase-change composite aerogel. The phase-change microcapsules are loaded in the silicon dioxide aerogel, and the nanofibers with good heat-conducting property are added toenhance the heat-conducting property of the aerogel skeleton, so that the phase-change microcapsules and the silicon dioxide aerogel are optimized.
本发明提供一种相变复合气凝胶及其制备方法，将硅源1和硅源2混合后溶于乙醇的水溶液中，室温条件下机械搅拌至混合均匀，再向上述分散液中加入酸性催化剂，调节分散液的pH至1‑3后，得到二氧化硅溶胶，向上述步骤1制备得到的二氧化硅溶胶中加入碱性催化剂，将二氧化硅溶胶pH至7‑10，再向上述溶胶中加入相变微胶囊和纤维，室温条件下机械搅拌至混合均匀后，将上述混合溶胶倒入模具中静置得到湿凝胶后，将上述湿凝胶从模具中脱出浸在无水乙醇溶液中老化10‑40h，最后置于25‑65℃下干燥20‑30h后，得到相变复合气凝胶。将相变微胶囊负载于二氧化硅气凝胶中，通过添加导热性能良好的纳米纤维，增强气凝胶骨架的导热性能，使二者达到最优化。
Phase-change composite aerogel and preparation method thereof
一种相变复合气凝胶及其制备方法
LI JING (Autor:in) / ZHANG YITING (Autor:in) / LIU HONGLI (Autor:in) / LI YAJING (Autor:in) / LI HONGYAN (Autor:in) / ZHANG ZHONGBI (Autor:in) / WANG XURUI (Autor:in)
23.02.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
| Europäisches Patentamt | 2021
| Europäisches Patentamt | 2020
| Europäisches Patentamt | 2024