Method for constructing metal-based surface with alternate hydrophilic and hydrophobic strips

Abstract

The invention discloses a method for constructing a metal-based surface with alternate hydrophilic and hydrophobic strips in the technical field of non-silicon micromachining and micronano functionalmaterial preparation. The method comprises the steps that a metal wire is tightly wound on a substrate, the wire and the substrate are integrally sintered under the pressure of weight, after the obtained sintered body is immersed in a hydrophobic nanoparticle turbid liquid, hydrophobic nanoparticles are deposited on the area, not covered by the metal wire, of the substrate, and the superhydrophobic strips are formed after high-temperature film hardening; the metal wire is peeled off from the substrate, and the exposed area forms the hydrophilic strips. The spacing and width of the strips of the constructed metal-based surface with the alternate hydrophilic and hydrophobic strips can be adjusted by adjusting the diameter of the metal wire and the pressure of the weight respectively; the method is simple and easy in operation, and has broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of non-silicon micromachining and preparation of micro-nano functional materials, and in particular relates to a method for constructing a metal-based hydrophilic-hydrophobic stripe-interface surface. Background technique [0002] The surfaces that exist in nature are mainly homogeneous wettability surfaces, such as: the surface of superhydrophobic aureus and the surface of lotus leaves; Function, for example: the surface of the banana leaf is composed of hydrophilic and hydrophobic stripes, which can realize the rapid collection and detachment of liquid. The biomimetic hydrophilic-hydrophobic stripe surface has gradually attracted attention in the fields of cell biochemical detection, fuel cell water management, and condensation heat transfer enhancement. In 2017 and 2018 alone, there were as many as 6 Natural Science Foundation projects on the research of condensation heat transfer on hydrophilic and hydr...

AI Technical Summary

Problems solved by technology

At present, the surface construction method of hydrophilic and hydrophobic stripes often uses MEMS processing, which is suitable for non-metallic surfaces such as glass, single crystal silicon, and PDMS, and often uses high-tech equipment such as lasers, plasmas, and synchrotron radiation. Small-scale development in the laboratory

However, there are very limited methods to realize the controllable structural parameters, low-cost, large-scale application, and micro-nano-composite hydrophilic-hydrophobic stripe-interfaced surfaces on metal substrates.

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