Preparation method of environment-friendly light-weighted sepiolite-based aerogel material

By using sepiolite as the main building block and freeze-drying, an environmentally friendly, lightweight sepiolite-based aerogel material was prepared, solving the problems of complex preparation and insufficient performance of SiO2 aerogel materials, and realizing the industrial application of high-performance aerogel materials.

CN117065673BActive Publication Date: 2026-03-03SHANGHAI TECHN INST OF ELECTRONICS & INFORMATION
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Patent Information

Application Number
CN202211473905.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-11-22
Publication Date
2026-03-03
Estimated Expiration
2042-11-22

AI Technical Summary

Technical Problem

The existing SiO2 aerogel materials have complex preparation processes, require large amounts of chemical reagents, and their mechanical properties cannot fully meet application requirements. Furthermore, the thermal insulation and mechanical properties of fiber-based aerogels are insufficient, which limits their industrial application.

Method used

Using sepiolite as the main building block, environmentally friendly lightweight sepiolite-based aerogel materials were prepared by adjusting the pH value of the dispersion and adding polyvinyl alcohol and crosslinking agents, combined with freeze-drying. The temperature difference during the freeze-drying process was controlled to form a stable three-dimensional network structure.

Benefits of technology

An environmentally friendly, lightweight sepiolite-based aerogel material with good mechanical properties, low thermal conductivity, and high porosity was prepared. It is suitable for industrial production, has excellent resilience and flexibility, and meets the requirements of industrial applications.

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Abstract

The present application relates to a kind of preparation methods of environment-friendly lightweight sepiolite-based aerogel material, belong to aerogel material preparation technical field.Firstly, sepiolite is dispersed in deionized water, after being uniformly dispersed by using hydrochloric acid solution to adjust pH to acidic, sepiolite dispersion is obtained.Sepiolite dispersion is mixed with polyvinyl alcohol solution or mixed solution of polyvinyl alcohol and crosslinking agent, and is uniformly dispersed, then is placed in container, in order to make the cross-section hole arrangement of the prepared sepiolite-based aerogel material have certain orientation, temperature difference is formed at the top and bottom of sepiolite mixed dispersion during freeze-drying, and environment-friendly lightweight sepiolite-based aerogel material is prepared.The environment-friendly lightweight aerogel prepared in the present application uses sepiolite as main raw material, with low cost, simple process, and the prepared aerogel material has excellent elasticity, mechanical property, flame retardancy and the like.
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Citation Information

Patent Citations

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