Multi-biomimetic fog water collecting structure and preparation method thereof

A fog water and biological technology, applied in water supply devices, drinking water devices, buildings, etc., can solve the problems of low fog water collection efficiency, difficulty in large-scale preparation, complex preparation process, etc., to reduce the probability of water droplet re-evaporation and low cost , The effect of simple structure preparation process

CN112302100AActive Publication Date: 2021-02-02XIAMEN UNIV
4 Cites 12 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-02-02

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a multi-biomimetic fog water collecting structure. A plurality of fog water collecting units are distributed on the upper surface of the fog water collecting structure; the edges of the upper surfaces of the fog water collecting units are tip structures imitating cactus thorns, and the middles of the upper surfaces of the fog water collecting units are special concave structures imitating hairy bodies around air holes of dracocephalum moldavica leaves, so that the upper surfaces of the fog water collecting units are of a wetting gradient structure with super-hydrophilicmicrostructure convex points and hydrophobic regions arranged alternately; a water storage unit is formed between every two adjacent fog water collecting units, and the the edges of the water storageunits are of a cactus thorn-like tip structure; and due to the distribution of the fog water collecting units, the upper surface of the whole fog water collecting structure is of a desert beetle backanisotropism wettability imitating structure. The multi-biomimetic fog water collecting structure can be prepared from a hydrophobic material with a certain tensile property, is wide in raw materialselection, can be prepared by adopting a circular truncated cone needle array and a femtosecond laser double-pulse system, is simple in process and can be prepared on a large scale.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of mist collection, and in particular relates to a bionic mist collection structure and a preparation method thereof. Background technique

[0002] The shortage of fresh water resources has become a serious global problem that needs to be solved urgently. Nowadays, seawater desalination and wastewater treatment are regarded as effective ways to recover fresh water, but there are problems such as high energy consumption, low efficiency, and complicated process. Fog water collection refers to the conversion of hidden water resources contained in the air into explicit and usable water resources. It is an environmentally friendly, low-cost and sustainable method to alleviate the scarcity of fresh water.

[0003] The potential for recovering fresh water from the air has not been effectively exploited so far. At present, a large number of mesh structures have been invested in fog water collection to capture fog ...

Examples

Embodiment 1

[0032] This embodiment provides a multi-bio-bionic mist collection structure, the upper surface of the mist collection structure is distributed with a plurality of mist collection units, such as figure 1 As shown, the edge of the upper surface of the mist collection unit is a tip structure (1) imitating cactus thorns and the middle is a special concave structure (2) imitating the trichomes around the stomata of Tillandsia leaf, so that the upper surface of the mist collection unit is super The wetting gradient structure between the hydrophilic microstructure bumps (that is, the tip structure part) and the hydrophobic region (the middle concave structure part, the surface of the concave structure part is hydrophobic, and the surface of the other parts of the mist collection unit is hydrophilic); such as figure 2 As shown, the edge is the water storage unit (3) of the tip structure of the imitation cactus thorn between the adjacent mist water collecting units; Figure 7 As show...

Embodiment 2

[0034] This embodiment provides a method for preparing the bionic mist collection structure described in Embodiment 1, comprising the following steps:

[0035] (1) Use polydimethylsiloxane (PDMS) as the base material to prepare PDMS solution: mix the prepolymer and curing agent at a weight ratio of 10:1, pour it into a beaker, and fully stir it with a glass rod to form PDMS solution, after stirring evenly, put the beaker into a vacuum desiccator for degassing;

[0036] (2) Preparation of imitation cactus thorns and imitation Tillandsia leaf structures: insert uniform circular needle arrays into pre-cured PDMS solution, the interaction between fluid and solid surface, surface tension of liquid-air interface and gravity will make As the PDMS solution rises, the upper surface of the PDMS solution rises on the surface of the needle wall along the entire circumference in the form of a catenary curve. Under the action of the capillary force, the upper surface of the solution produce...