Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of material with bionic hydrophobic-hydrophilic surface and its preparation method and application

A hydrophilic surface and hydrophilic technology, applied in the field of bionic materials, can solve the problems of short service life, poor corrosion resistance, complicated process, etc., and achieve the effect of excellent water collection performance

Active Publication Date: 2022-06-24
SHANGHAI UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above method can realize dropwise condensation and improve the condensation heat transfer efficiency, the cost is high, the process is complicated, the construction conditions are harsh, and all use metal materials, which have poor corrosion resistance and short service life.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of material with bionic hydrophobic-hydrophilic surface and its preparation method and application
  • A kind of material with bionic hydrophobic-hydrophilic surface and its preparation method and application
  • A kind of material with bionic hydrophobic-hydrophilic surface and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] Combine the following figure 1 The specific steps of the above-mentioned preparation method are shown.

[0035] First, a dispersion liquid is obtained by dispersing hydrophilic fine particles in a hydrophobic polymer (ie, a film-forming resin).

[0036] The kind of the above-mentioned film-forming resin is not limited. The film-forming resin can be a water-based resin and / or a solvent-based resin (the water-based resin is a resin system with water as a dispersion medium, the resin and water form a solution, and after the water volatilizes, a resin film material is formed. The solvent-based resin is Resin system with organic solvent as dispersion medium). The water-based resin includes, but is not limited to, one or more of water-based acrylic resin, water-based polyurethane, and derivatives thereof. The solvent-based resin includes, but is not limited to, one or more of solvent-based acrylic resin, solvent-based epoxy phenolic resin, solvent-based epoxy resin, solven...

Embodiment 1

[0060] The hydrophilic SiO with a diameter of 85 μm was 2 Ultrasonic dispersion of microspheres in water-based acrylic resin to obtain hydrophilic SiO 2 A uniform dispersion with a mass fraction of microspheres of 10 wt%.

[0061] The dispersion is evenly coated on the stainless steel substrate by dipping to obtain a micron-scale uneven structure and a fully hydrophobic surface (such as figure 2 shown).

[0062] Lightly sand the raised hydrophilic SiO with dry sandpaper 2 Hydrophobic layer on the surface of microspheres, removing hydrophilic SiO 2 A water-based acrylic resin layer wrapped on the surface of the microspheres to obtain a localized hydrophilic surface (such as image 3 shown).

[0063] N on the coating surface 2 Plasma treatment was carried out, the treatment power was 300w, the pressure was 30-60pa, and the treatment time was 5min, to construct a nanoscale array, and obtain a biomimetic hydrophobic-hydrophilic surface with a micro-nano composite structure ...

Embodiment 2

[0066] The hydrophilic titanium oxide with a diameter of 40 μm was uniformly dispersed in the water-based polyurethane by magnetic stirring to obtain a dispersion liquid with a mass fraction of 15 wt % of the hydrophilic titanium oxide.

[0067] The dispersion liquid is uniformly scraped on the polyethylene substrate to obtain a micron-level concavo-convex structure and a fully hydrophobic surface.

[0068] Nanoscale structures are etched on the surface of the coating by laser etching to obtain a biomimetic hydrophobic-hydrophilic surface with a micro-nano composite structure.

[0069] A square film of 2 cm × 2 cm was cut out, and the water vapor collection test was carried out using a water collecting device.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
sizeaaaaaaaaaa
sizeaaaaaaaaaa
contact angleaaaaaaaaaa
Login to View More

Abstract

The invention discloses a material with a bionic hydrophobic-hydrophilic surface, a preparation method and application thereof. The material with bionic hydrophobic-hydrophilic surface is formed by constructing nano-protrusions on the composite surface with hydrophilic micro-protrusions and hydrophilic-hydrophobic regions. The material of the water surface; the distribution density of the micro-protrusions is 1000 / cm 2 ‑3000pcs / cm 2 .

Description

technical field [0001] The invention belongs to the field of biomimetic materials, in particular to a biomimetic hydrophobic-hydrophilic surface and a preparation method and application thereof. Background technique [0002] Water resources are the source of life. Although the total reserves of water resources are large, most of them exist in the form of seawater, and the available freshwater resources are very limited, which seriously restricts the life of the people. Especially in arid desert areas, not only the surface freshwater resources are very scarce, but also the rainfall is low and water resources are scarce. However, these places generally have a large temperature difference between day and night, and the air humidity is high at night. Therefore, some efficient water collection materials can be designed to capture freshwater resources in the air to alleviate the water crisis in these areas. [0003] Water vapor condensation is divided into two modes: droplet cond...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B05D5/08B05D5/04C09D133/04C09D7/61C09D163/04C09D163/00
CPCB05D5/08B05D5/04C09D133/04C09D7/61C09D175/04C09D163/04C09D7/70C09D163/00C09D7/69C08K2003/2241C08K7/18C08K3/22C08K3/36
Inventor 高彦峰唐宇韡陈长李玉萍
Owner SHANGHAI UNIV