Method and device for preparing anisotropic aerogel from clay mineral nanosheet dispersion liquid

By directional freezing and freeze-drying of clay mineral nanosheet dispersions, the problems of complex and costly preparation of traditional aerogels have been solved, and anisotropic aerogels suitable for high-temperature extreme environments have been prepared, exhibiting excellent thermal insulation performance and structural stability.

CN121553957APending Publication Date: 2026-02-24CENT SOUTH UNIV
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Patent Information

Application Number
CN202510631518.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-16
Publication Date
2026-02-24

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Abstract

The invention provides a method and device for preparing anisotropic aerogel from clay mineral nanosheet dispersion liquid, and the method comprises the following steps: placing the clay mineral nanosheet dispersion liquid in a freezing mold, and carrying out directional freezing to obtain solid nanosheets; and freeze-drying the freezing mold and the solid nanosheets together to obtain the anisotropic aerogel, wherein the temperature of the first end of the freezing mold is lower than that of the second end of the freezing mold, the temperature of the first end ranges from-80 DEG C to-5 DEG C, and the freezing time ranges from 0.5 h to 8 h. The temperature gradient from the first end to the second end is formed at low temperature, and freezing directional arrangement is carried out at the temperature gradient. And the formed aerogel has excellent heat insulation characteristic in the vertical direction of directional arrangement of the solid nanosheets. In addition, the preparation method and device are simple in arrangement, convenient to operate and low in cost, and low-cost industrial production can be achieved.
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Patent Citations

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