A preparation and regulation method of superhydrophobic/superhydrophilic reversible regulation of metal surface

A metal surface, super-hydrophobic technology, applied in the field of metal surface treatment, can solve the problems of high cost, complicated preparation process, difficult implementation, etc., and achieve the effect of low production cost, simple process and low cost

Active Publication Date: 2020-12-04
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many of the above methods have the following problems: 1. The preparation process is complicated and costly, and some require the modification of low surface energy fluorosilane molecules, and the reagents used have certain toxicity and environmental problems; 2. Partially superhydrophobic / superhydrophilic The adjustment method requires chemical treatment or special equipment, which is difficult to implement; 3. Relatively environmentally friendly super-hydrophobic / super-hydrophilic adjustment methods, such as: ultraviolet light irradiation / dark storage, the adjustment period is as long as one week or even several weeks

Method used

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  • A preparation and regulation method of superhydrophobic/superhydrophilic reversible regulation of metal surface
  • A preparation and regulation method of superhydrophobic/superhydrophilic reversible regulation of metal surface
  • A preparation and regulation method of superhydrophobic/superhydrophilic reversible regulation of metal surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Cut an aluminum sheet with a size of 5 × 2.5 × 0.03 cm, first polish it with 240-grit sandpaper, and then polish it with 600-grit sandpaper, clean the metal surface with ethanol, acetone, and distilled water in sequence, and dry it naturally; use a concentration of 3mol / L The hydrochloric acid solution corrodes the cleaned aluminum sheet at 25°C for 15 minutes, rinses it with distilled water, and places it in the air to dry naturally; put the corroded and dried aluminum sheet at a temperature of 150°C Heat in a vacuum drying oven under normal pressure for 72 hours, and cool naturally to room temperature to obtain a superhydrophobic aluminum sheet; put the prepared superhydrophobic aluminum sheet in a muffle furnace at 450°C for 24 hours, and naturally cool to room temperature, the superhydrophobic aluminum sheet The sheet becomes a superhydrophilic aluminum sheet; repeating the above-mentioned 150°C vacuum drying oven heat treatment and 450°C muffle furnace heat treatmen...

Embodiment 2

[0034] (1) Cut out an aluminum block with a size of 5 × 2.5 × 2.5 cm, first polish it with 180-grit sandpaper, then polish it with 1000-grit sandpaper, clean the metal surface with ethanol, acetone, and distilled water in turn, and dry it naturally; use a concentration of 6mol / L sulfuric acid solution at 40°C to corrode the cleaned aluminum block for 1 min, rinse it with distilled water, and place it in the air to dry naturally; put the corroded aluminum block to dry at a temperature of Put the superhydrophobic aluminum block in a vacuum drying oven at 180°C for 16 hours under normal pressure and seal it; put the prepared superhydrophobic aluminum block in water at 100°C for 15 minutes, take it out, cool it, and dry it naturally. The superhydrophobic aluminum block becomes It is a superhydrophilic aluminum block. Repeated 180°C vacuum drying oven heat treatment and 100°C boiling water heat treatment operations can achieve repeated reversible conversion of superhydrophobic / sup...

Embodiment 3

[0036] Cut out a zinc sheet with a size of 2×4×0.03cm, first polish it with 400-grit sandpaper, then polish it with 1000-grit sandpaper, wash the zinc sheet with ethanol, acetone, and distilled water in sequence, and dry it naturally; put the cleaned zinc sheet into The hydrochloric acid solution with a concentration of 4mol / L was corroded at 25°C for 60s, rinsed with distilled water, and placed in the air to dry naturally; put the corroded and dried zinc sheet at a temperature of 150°C The superhydrophobic zinc flakes were prepared by sealing and standing in a vacuum drying oven under normal pressure for 24 hours; the superhydrophobic zinc flakes were heated in a muffle furnace at 340 °C for 12 hours, and cooled naturally to room temperature, and the superhydrophobic zinc flakes transformed into superhydrophobic zinc flakes. Hydrophilic. Repeating the above-mentioned 150°C vacuum drying oven heat treatment and 340°C muffle furnace heat treatment operation can realize the repe...

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Abstract

The invention discloses a method for preparing, regulating and controlling a super-hydrophobic / super-hydrophilic reversible regulation metal surface. Aluminum, zinc and copper metal surfaces capable of carrying out super-hydrophobic / super-hydrophilic reversible regulation are prepared through chemical corrosion and high-temperature annealing treatment, and based on the prepared metal surfaces, super-hydrophobic / super-hydrophilic reversible conversion and regulation of the metal surfaces are realized only through heat treatment under different conditions. The method for preparing, regulating and controlling the super-hydrophobic / super-hydrophilic surface regulation metal is simple in process, low in cost, environment-friendly and capable of mass production and preparation, and can be used for aspects of metal corrosion prevention, self-cleaning, pollution prevention, fluid drag reduction, bacteriostasis and the like.

Description

technical field [0001] The invention relates to the field of metal surface treatment, in particular to a preparation and control method for directly constructing a superhydrophobic / superhydrophilic reversible conversion surface on a metal surface. Background technique [0002] Surface wettability is an important characteristic of the surface of solid materials, usually measured by water contact angle. The wettability of solid material surfaces includes two extreme wettability properties: superhydrophobic (contact angle >150°) and superhydrophilic (contact angle <10°). There are many extreme wetting phenomena in nature, such as superhydrophobic phenomena such as self-cleaning on the surface of lotus leaves and water strider floating, and some tropical plants (usnea pineapple, peat moss, etc.) exhibit superhydrophilic phenomena on the leaf surface in order to adapt to the environment. Superhydrophobic materials can be widely used in fields such as waterproof, antifoulin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F1/20C23F1/30C23F1/34C22F1/02
CPCC22F1/02C23F1/20C23F1/30C23F1/34
Inventor 熊忠田秀秀杨文杰王玲晨赵志敏王丽圆王志群刘敬旭
Owner QINGDAO UNIV
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