A porous foam with a biomimetic lotus seedpod surface structure and its preparation

A porous foam with a biomimetic lotus seedpod surface structure was prepared by vacuum solution casting and salt template method, which solved the contradiction between salt resistance and evaporation efficiency in solar evaporators, and achieved high-efficiency and stable evaporation performance and self-cleaning ability, making it suitable for sewage treatment and seawater desalination.

CN120398168BActive Publication Date: 2026-06-30FUJIAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
FUJIAN UNIV OF TECH
Filing Date
2025-04-03
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing solar evaporators are difficult to manufacture simultaneously with special surface structures and abundant internal pore channels, resulting in a contradiction between salt resistance and evaporation efficiency.

Method used

A porous foam with a biomimetic lotus seedpod surface structure was prepared by using vacuum solution casting technology and salt template method combined with template-assisted technology. The foam includes hemispherical pores on the surface and a honeycomb-like multi-level pore structure in the lower layer. The composite foam was formed by using photothermal particles and polymer materials.

Benefits of technology

It achieves efficient and stable evaporation performance and high salt tolerance in NaCl solutions of different concentrations, and has good self-cleaning ability, making it suitable for wastewater treatment and seawater desalination.

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Abstract

This invention proposes a porous foam with a biomimetic lotus seedpod surface structure and its preparation method, belonging to the technical field of photothermal conversion materials, to solve the technical problems of poor water evaporation performance and salt resistance in solar evaporators. This invention proposes a composite foam prepared using a combination of vacuum solution casting technology / salt template method / template-assisted technology, which simultaneously possesses a hemispherical pore structure on the surface and a honeycomb-like hierarchical pore structure in the lower layer. Benefiting from the unique surface and internal pore structure, the solar evaporator exhibits highly efficient and stable evaporation performance in NaCl solutions of different concentrations, high salt resistance, and good self-cleaning ability. This double-layer hierarchical porous composite foam has broad application prospects in wastewater treatment and seawater desalination. The preparation method has advantages such as simple process, convenient operation, controllable surface pore structure and internal pore morphology, and the ability to form evaporators with complex shapes.
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