Super-hydrophobic aluminum alloy filter screen as well as preparation method and application thereof

Abstract

The invention provides a super-hydrophobic aluminum alloy filter screen as well as a preparation method and an application thereof. The method comprises the steps that firstly, parallel seams are carved in the back face of an aluminum alloy in air through focused femtosecond lasers to form a seam array; under the assistance of a sucrose solution, a density-controllable nano mastoid structure is induced on the front surface of the aluminum alloy through focused femtosecond laser; and then polydimethylsiloxane is adopted for treating the front face of the aluminum alloy to enable the aluminum alloy to be super-hydrophobic, the super-hydrophobic aluminum alloy filter screen is prepared, the problem that the oil-water separation effect becomes poor due to the fact that the surface of the aluminum alloy is prone to oxidation is solved, and the purposes of surface super-hydrophobicity, underwater super-lipophilicity modification and efficient oil-water separation are achieved.

Description

technical field [0001] The invention belongs to the comprehensive cross field of integration of light, machine, computer and materials, and relates to a new wettability-bionic micro-nano structure material and its preparation method and application, in particular to a super-hydrophobic aluminum alloy filter screen and its Preparation method and application. Background technique [0002] Materials with nano-structures on the surface are widely used in production and life. For example, silicon with nano-cone structures on the surface can be used as antibacterial materials in medicine, and metals with nano-protrusion structures on the surface can be used for water mist collection, frost and frost protection Oil-water separation, etc. [0003] The most famous superhydrophobic surface in nature is the surface of lotus leaves and rose petals. There are a large number of micron-scale papillae structures randomly distributed on the surface of rose petals, and the micro-papillae are...

AI Technical Summary

Problems solved by technology

However, the femtosecond laser ablates metal in the air, and the interference effect between the surface plasmon wave and the incident laser will cause a sub-wavelength periodic stripe structure perpendicular to the laser polarization direction on the metal surface, which makes it necessary to obtain clean special micro-nano structure becomes difficult

At the same time, the metal filter that is super-hydrophilic and underwater super-oleophobic after femtosecond laser treatment has the problem of easy oxidation. After oxidation, the super-hydrophilic property will be weakened, resulting in poor oil-water separation effect.

In addition, fluorosilane is usually used to modify the low surface energy of materials, and the modification process is complex and toxic

Images