Multiple biological characteristic inspired fog water collection composite Janus membrane and preparation method thereof

Abstract

The invention discloses a multiple biological characteristic inspired fog water collection composite Janus membrane and a preparation method thereof which relate to the field of water collection. Theinvention aims to solve the problems that in the case of an existing planar Janus membrane, the fog condensation effect of a super-hydrophobic surface is relatively poor, a super-hydrophilic surface has relatively large adhesion to water so that water drops cannot be easily dripped, and fog in the parallel direction cannot be captured. Inspired by asymmetric microscopic geometrical shapes of cactus thorns and desert beetle back bulges and hydrophobic / hydrophilic alternate microscopic patterns and combining a femtosecond laser processing technology, the invention provides a droplet self-suctiontype hierarchical hydrophilic / hydrophobic / bulge synergistic Janus membrane (HHHBJ). The fog water collection efficiency of the HHHBJ membrane prepared by the method is higher than that of the Janus membrane, and the HHHBJ membrane can better adapt to severe natural environments. The multiple biological characteristic inspired fog water collection composite Janus membrane and the preparation method thereof are applied to the field of fog water collection.

Description

technical field [0001] The invention relates to the field of water collection, in particular to a multi-biological feature-inspired "fog water collection" composite double-sided mask and a preparation method thereof. Background technique [0002] The shortage of fresh water endangers the survival of billions of people. In recent years, with the development of science and technology, people have begun to explore various devices for collecting fresh water. Fog consists of masses of tiny water droplets suspended in the atmosphere and contains nearly 10 percent of all fresh water on Earth. Therefore, collecting mist water from the air may be a promising low-cost and low-environmental-impact option for obtaining fresh water. According to previous research reports, the ideal mist collection device is mainly related to the following factors: 1) good condensation ability of water mist 2) rapid transfer of water droplets 3) timely removal of water droplets 4) prevention of secondary...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the mist condensation effect on the super-hydrophobic surface of the current planar double-sided film is poor; the adhesion of the super-hydrophilic surface to water is relatively large, the water droplets are not easy to drip, and the mist in the parallel direction cannot be captured. To provide a multi-biological feature-inspired "fog water collection" composite double-sided mask and its preparation method

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