A biomimetic salt-inhibiting resistant nanofiber hydrogel photothermal evaporator and its preparation method

By constructing a composite network structure with flexible ceramic nanofibers, organic binders, and phase change curing agents, the problems of easy detachment and blockage of the photothermal functional layer are solved, and the high efficiency, stable operation, and anti-salting performance of the photothermal evaporator are achieved.

CN122079537APending Publication Date: 2026-05-26NANTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANTONG UNIV
Filing Date
2025-12-29
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

The existing photothermal evaporator has weak adhesion between the photothermal functional layer and the substrate, making it easy to fall off. Furthermore, the coating material can easily clog the moisture transmission channels, leading to insufficient water supply and salt precipitation problems, making it difficult to use stably for a long time in complex aquatic environments.

Method used

A composite network structure is constructed using flexible ceramic nanofibers, organic binders, and phase change curing agents. Photothermal functional materials are anchored to the fiber surface through chemical crosslinking and physical entanglement, forming a three-dimensional porous network. The phase change process is used to form a microporous structure to avoid clogging.

Benefits of technology

It improves the adhesion strength and porosity retention of photothermal materials, ensuring the simultaneous improvement of photothermal conversion efficiency and water vapor escape rate, achieving anti-salting performance and long-term stability, and adapting to high temperature and complex environments.

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Abstract

This application relates to the field of photothermal conversion functional materials, and discloses a biomimetic anti-salting nanofiber hydrogel photothermal evaporator and its preparation method. The evaporator uses flexible ceramic nanofibers as the matrix, combined with an organic binder, a phase change curing agent, and photothermal functional materials. The preparation method includes: firstly, shearing and dispersing the flexible ceramic nanofibers and the organic binder, followed by freeze-drying and thermal cross-linking to construct a three-dimensional porous precursor aerogel; subsequently, impregnating the aerogel in a solution containing the phase change curing agent and photothermal particles, and using a thermally induced non-solvent phase change process to cause phase separation of the phase change curing agent and in-situ anchoring of the photothermal particles to the fiber skeleton surface. This invention utilizes phase change anchoring technology to solve the problems of weak adhesion and easy pore blockage in existing photothermal coatings. The resulting evaporator possesses excellent wet mechanical strength, washability, and efficient water transport and anti-salting performance.
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