Bionic magnetism induced self-assembled aerogel solar evaporator and preparation method thereof

The manufacturing of aerogel solar evaporator with Janus continuous double-layer structure through magnetic induction self-assembly process solves the problems of fragility and dirt in the existing Janus evaporator structure, and achieves efficient water evaporation and mechanical performance improvement.

CN119707005AInactive Publication Date: 2025-03-28ZHENGZHOU UNIV
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Patent Information

Application Number
CN202411760790.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-03
Publication Date
2025-03-28
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Due to its fragile discontinuous double-layer structure, the existing Janus solar evaporator has the efficiency of photothermal water evaporation being easily affected by changes in the external environment, and the surface dirt problem seriously reduces its reliability and water evaporation efficiency.

Method used

Aerogel solar evaporator with integrated Janus continuous bilayer structure was fabricated by a magnetic induction self-assembly process, Fe3O4@ppy photothermal particles coated with magnetic polypyrrole are embedded in a hydrophilic matrix composed of sodium alginate and polyvinyl alcohol, and the fluorine coating is modified on the top surface to improve soil resistance.

Benefits of technology

A robust solar evaporator is realized, which improves water evaporation efficiency and structural mechanical properties, and can achieve an evaporation rate of 2.13kg.m-2.h-1 at twice the solar irradiation intensity, and achieves a Young's modulus of more than 4MPa in the axial direction, maintaining structural integrity.

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Abstract

The invention discloses a bionic magnetism induced self-assembled aerogel solar evaporator and a preparation method thereof, and relates to the technical field of Jan us solar evaporators. The preparation process of the aerogel solar evaporator comprises the steps that a Janus continuous double-layer structure with the top layer being a Fe3O4-rich layer and the bottom layer being a gel layer is prepared from a mixed solution composed of magnetic polypyrrole coated Fe3O4-coated ppy, sodium alginate and polyvinyl alcohol under one-way magnetic induction, then the double-layer structure is cast through a directional freezing casting method, and the aerogel solar evaporator is obtained. And then the cast double-layer structure is subjected to ionic crosslinking in CaCl2 and H3BO3 solutions, and finally the surface of the top layer of the double-layer structure is modified with a fluorine coating, so that the aerogel solar evaporator can be obtained. The technical problem that the evaporation efficiency of an existing evaporator is prone to being affected by external environment changes (such as friction) is solved, and the breakthrough evaporation rate of 2.13 kg.m <-2 >. H <-1 > is achieved.
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