Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention discloses lanthanum zirconate/silicon dioxide composite aerogel and a preparation method thereof. The preparation method comprises the following steps: S1, taking lanthanum nitrate hexahydrate and zirconium nitrate pentahydrate as precursors, taking epoxypropane as a catalyst, and obtaining LZ sol in an absolute ethyl alcohol solvent; s2, tetraethoxysilane is taken as a precursor, hydrochloric acid is taken as a catalyst, hydrolysis is carried out in ethanol and a water solvent, and SiO2 sol is obtained; s3, dropwise adding the obtained SiO2 sol into LZ sol to obtain a mixed solution, and dropwise adding the mixed solution into an epoxypropane gel accelerator to obtain LZS sol; s4, dipping the pretreated fiber in the LZS sol or uniformly dripping the prepared LZS sol on the fiber until the fiber is fully infiltrated, applying pressure to the fiber through a mold, and standing in a drying oven to obtain FLZS gel; s5, subjecting the FLZS gel to aging and supercritical drying so as to obtain FLZS aerogel; the aerogel has a unique pyrochlore structure and good heat insulation performance and mechanical strength, and has an extremely good application prospect in the field of heat preservation and heat insulation.
本发明公开一种锆酸镧/二氧化硅复合气凝胶及其制备方法，该制备方法包括：S1：以六水硝酸镧、五水硝酸锆为前驱体，以环氧丙烷作为催化剂在无水乙醇溶剂中获得LZ溶胶；S2：以正硅酸乙酯为前驱体，以盐酸作为催化剂，在乙醇与水溶剂下水解，获得SiO2溶胶；S3：将得到的SiO2溶胶滴入LZ溶胶中，得到混合溶液，将混合溶液逐滴滴入环氧丙烷凝胶促进剂，得到LZS溶胶；S4：将预处理的纤维浸渍在LZS溶胶中或将制备好的LZS溶胶均匀地滴在纤维上直至充分浸润，通过模具给纤维施加压力，并在烘箱中静置，得到FLZS凝胶；S5：FLZS凝胶经过老化、超临界干燥得到FLZS气凝胶；该气凝胶兼具独特的烧绿石结构以及良好的隔热性能和力学强度，在保温隔热领域具有极好的应用前景。
The invention discloses lanthanum zirconate/silicon dioxide composite aerogel and a preparation method thereof. The preparation method comprises the following steps: S1, taking lanthanum nitrate hexahydrate and zirconium nitrate pentahydrate as precursors, taking epoxypropane as a catalyst, and obtaining LZ sol in an absolute ethyl alcohol solvent; s2, tetraethoxysilane is taken as a precursor, hydrochloric acid is taken as a catalyst, hydrolysis is carried out in ethanol and a water solvent, and SiO2 sol is obtained; s3, dropwise adding the obtained SiO2 sol into LZ sol to obtain a mixed solution, and dropwise adding the mixed solution into an epoxypropane gel accelerator to obtain LZS sol; s4, dipping the pretreated fiber in the LZS sol or uniformly dripping the prepared LZS sol on the fiber until the fiber is fully infiltrated, applying pressure to the fiber through a mold, and standing in a drying oven to obtain FLZS gel; s5, subjecting the FLZS gel to aging and supercritical drying so as to obtain FLZS aerogel; the aerogel has a unique pyrochlore structure and good heat insulation performance and mechanical strength, and has an extremely good application prospect in the field of heat preservation and heat insulation.
本发明公开一种锆酸镧/二氧化硅复合气凝胶及其制备方法，该制备方法包括：S1：以六水硝酸镧、五水硝酸锆为前驱体，以环氧丙烷作为催化剂在无水乙醇溶剂中获得LZ溶胶；S2：以正硅酸乙酯为前驱体，以盐酸作为催化剂，在乙醇与水溶剂下水解，获得SiO2溶胶；S3：将得到的SiO2溶胶滴入LZ溶胶中，得到混合溶液，将混合溶液逐滴滴入环氧丙烷凝胶促进剂，得到LZS溶胶；S4：将预处理的纤维浸渍在LZS溶胶中或将制备好的LZS溶胶均匀地滴在纤维上直至充分浸润，通过模具给纤维施加压力，并在烘箱中静置，得到FLZS凝胶；S5：FLZS凝胶经过老化、超临界干燥得到FLZS气凝胶；该气凝胶兼具独特的烧绿石结构以及良好的隔热性能和力学强度，在保温隔热领域具有极好的应用前景。
Lanthanum zirconate/silicon dioxide composite aerogel and preparation method thereof
一种锆酸镧/二氧化硅复合气凝胶及其制备方法
05.11.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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