Preparation method of efficient condensation hydrophilic and hydrophobic thin-film coating with multi-scale structure

Abstract

The invention discloses a preparation method of an efficient condensation hydrophilic and hydrophobic thin-film coating with a multi-scale structure, and belongs to the field of thin-film coating preparation methods. The preparation method comprises the steps: a titanium dioxide thin film with a micrometer and nanometer secondary composite structure is prepared on a glass substrate; the titanium dioxide thin film is modified; and a hydrophilic and hydrophobic combined surface is prepared through ultraviolet mask photolithography. The titanium dioxide microspheric thin film prepared through in-situ growth of a hydrothermal method is good in structure, good in uniformity and compactness, high in purity, low in cost, easy in technological operation, low in reaction temperature and less in energy consumption, hydrophilic and hydrophobic areas prepared by combining with vapor deposition and the ultraviolet mask photolithography are regularly arrayed, wall surfaces have micrometer, nanometerand millimeter scale multi-stage feature structures and have very high photoresponse regulable and controllable characteristics, and by regulating and controlling the width and number of the hydrophilic and hydrophobic areas with the millimeter-scale surfaces, the hydrophilic and hydrophobic heterogeneous combined surface with high condensation efficiency is prepared.

Description

Technical field: [0001] The invention belongs to the field of thin-film coating preparation methods, and in particular relates to a preparation method of a high-efficiency condensation hydrophilic and hydrophobic thin-film coating with a multi-scale structure regulated by light response. Background technique: [0002] When steam condenses, it will release a lot of latent heat, so its heat transfer performance has great application potential in refrigeration, thermal power generation, petrochemical, aerospace, micro-phase change thermal control devices and other fields. In recent years, the advantages of superhydrophobic walls in controlling droplet fusion and shedding and enhancing droplet condensation have attracted the attention of researchers. However, the extremely low surface energy of superhydrophobic walls forms a high energy barrier to droplet nucleation. This makes it difficult to further improve the condensation performance of superhydrophobic walls. Inspired by t...

AI Technical Summary

Problems solved by technology

In recent years, the advantages of superhydrophobic walls in controlling droplet fusion and shedding and enhancing droplet condensation have attracted the attention of researchers. However, the extremely low surface energy of superhydrophobic walls forms a high energy barrier for droplet nucleation. Make it difficult to further improve the condensation performance of the super-hydrophobic wall surface

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