Preparation and application of an environmentally friendly and low-cost superhydrophobic powder material

Abstract

The invention discloses the preparation and application of an environment-friendly and low-cost super-hydrophobic powder material. The micro-nano material KL is obtained by adding 50%-90% absolute ethanol into the micro-nano material KL, stirring for 1-5min, and ultrasonically dispersing for 5-15min. Dispersion liquid; adding long-chain silane and ethyl orthosilicate with a volume ratio of 1: (1-1.25) in sequence; adding sodium nitrate aqueous solution containing 1.9-2.1 molar mass to the micro-nano material KL mixture, and continuing to stir for 10- 30 minutes; the micro-nano material KL mixed solution was subjected to double-electrode electrolysis; after the reaction, the solution was ultrasonically washed and centrifuged, and dried to obtain a superhydrophobic powder. The invention increases the utilization rate of low surface energy substances, improves the yield of the super-hydrophobic material, reduces the preparation cost of the super-hydrophobic material, and adopts a two-electrode system for reaction, thereby shortening the reaction time.

Description

technical field [0001] The invention relates to the field of superhydrophobic materials, in particular to the preparation and application of an environmentally friendly and low-cost superhydrophobic powder material. Background technique [0002] According to wettability, materials can be divided into superhydrophobic materials, hydrophobic materials, hydrophilic materials, superhydrophilic materials and amphoteric materials. Usually superhydrophobic surface refers to a type of material surface where water droplets of a certain size have a water contact angle greater than 150° and a roll angle less than 10° on the material surface. For example, the surface of lotus leaves and butterfly wings is a typical superhydrophobic surface in nature. Due to the excellent functions such as self-cleaning, anti-icing, anti-corrosion, waterproof, and anti-fog, the surface of superhydrophobic materials has broad application prospects in the fields of aviation, automobiles, anti-corrosion, co...

AI Technical Summary

Problems solved by technology

The commonly used superhydrophobic surface preparation methods at this stage include electrodeposition, hydrothermal method, chemical etching method, vapor deposition method, sol-gel method, electrospinning method, plasma treatment and laser engraving method, etc. Although these methods can Effectively prepare superhydrophobic surfaces, but often require higher experimental conditions or are only applicable to specific material substrates, and there are problems such as weak combination of micro-nano structures and substrates, long preparation time, and complicated processes, which are not convenient for other substrates. promotion and practical application on a large scale

In addition, in the process of reducing surface energy, fluoropolymers / compounds are usually used as low surface energy substances, and involve the use of a large amount of toxic organic solvents such as acetone, toluene, methylene chloride, etc., which not only makes the preparation of superhydrophobic surfaces The cost is high, and it may also cause environmental pollution, endanger human health and other problems. Therefore, there is a need for the preparation and application of an environmentally friendly and low-cost superhydrophobic powder material that can effectively solve the above problems.

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