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Preparation method of super-infiltrated silicone oil type liquid filling surface

A liquid perfusion and super-wetting technology, which is applied to devices for coating liquids on surfaces, special surfaces, pretreated surfaces, etc., can solve the problems of expensive materials, human health and the environment, troublesome and harmful manufacturing processes, etc., and achieve cheap raw materials and low cost. Environmental protection, good corrosion resistance, good durability

Pending Publication Date: 2020-07-31
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the fabrication process of these surfaces is cumbersome and limited by the substrate, and inevitably involves the utilization of fluorine-containing materials, which are expensive and harmful to human health and the environment

Method used

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  • Preparation method of super-infiltrated silicone oil type liquid filling surface
  • Preparation method of super-infiltrated silicone oil type liquid filling surface
  • Preparation method of super-infiltrated silicone oil type liquid filling surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1, the preparation of super-wetting silicone oil type liquid perfusion surface

[0035] (1) Preparation of the suspension: at room temperature, first disperse 1 g of palygorskite powder and 0.44 g of octadecyltrimethoxysilane in 15 mL of ethanol to form a mixture, then add 20 mL of mL of aluminum phosphate binder aqueous solution, and then stirred at 20~30°C for 10~20 min to obtain a uniform suspension;

[0036] (2) Preparation of APT-OTMS-AP coating surface: spray the prepared suspension evenly on the pretreated magnesium flakes with a spray gun; Heating for 1.5~2.0 h to make the coating completely cross-linked and cured to obtain a super-hydrophobic APT-OTMS-AP coating;

[0037] (3) Preparation of silicone oil-type liquid perfusion surface: Silicone oil was added dropwise to the surface of the prepared superhydrophobic APT-OTMS-AP coating, so that the silicone oil entered into the micro-nano hierarchical porous structure to obtain a liquid perfusion surface....

Embodiment 2

[0038] Embodiment 2, wettability test

[0039] The APT-OTMS-AP coating surface prepared in Example 1 and the silicone oil-type liquid perfusion surface were placed horizontally on the contact angle measuring instrument, and 4 μL of oil and different liquids were taken for measurement. The contact angles of APT-OTMS-AP coating surfaces are all greater than 150°, while the rolling angles are less than 10°. The contact angles of different liquids on the silicone oil-based liquid perfusion surface are reduced, while the sliding angles are basically unchanged. For some complex mixtures Or organic liquids (such as milk, ethylene glycol) still have a lower rolling angle on the silicone oil-based liquid-filled surface, which indicates that the silicone-oil-based liquid-filled surface has excellent liquid repellency and universality (see Figure 4 ).

Embodiment 3

[0040] Embodiment 3, mechanical performance test

[0041] Place the APT-OTMS-AP coating prepared in Example 1 horizontally on the surface of 800-mesh SiC sandpaper, place a 500g weight on top of the sample, and then drag it back and forth with tweezers. Then the APT-OTMS-AP coatings subjected to wear tests with different cycles were subjected to contact angle measurement. After 100 wear cycles, the contact angle is still greater than 150°. The APT-OTMS-AP coating was placed obliquely, and 20-120 g of sand in the funnel was dropped from a height of 20 cm and hit the surface of the APT-OTMS-AP coating. After being impacted by different weights of sand, the surface of the APT-OTMS-AP coating still maintains superhydrophobicity, and the contact angle remains above 150° (see Figure 5 ).

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Abstract

The invention discloses a preparation method of a super-infiltrated silicone oil type liquid filling surface. Palygorskite powder and octadecyltrimethoxysilane are dispersed in ethyl alcohol, mixed liquid is formed, then an aluminum phosphate adhesive water solution is added, then the material is stirred at the temperature of 20-30 DEG C for 10-20 min, and uniform suspension is obtained; the suspension is sprayed to the surface of a magnesium piece with a spraying method, the magnesium piece is heated at the temperature of 110-120 DEGC for 1.5-2.0 h, a coating is completely cross-linked and cured, and an APT-OTMS-AP coating is obtained; and silicone oil is dropwise added into the surface of the super-hydrophobic APT-OTMS-AP coating, and the super-infiltrated silicone oil type liquid filling surface is obtained after standing. The preparation process of the liquid filling surface is simple, the raw materials are cheap and environmentally friendly, the liquid filling surface has extremely high hydrophobicity and excellent wear resistance and impact resistance, and even after being ground by abrasive paper and impacted by gravel, the liquid filling surface is still kept at high-levelhydrophobicity. In addition, the liquid filling surface has good corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of coatings, and relates to a method for preparing a superwetting silicone oil type liquid perfusion surface. Background technique [0002] As nature evolves, organisms develop specialized structures, patterns or textures with complex functionality. Inspired by the pitcher plant, Aizenberg first proposed a synthetic liquid-infused porous surface in 2011 and demonstrated that it differs from the lotus effect. Due to the injection of lubricating oil, the gas barrier layer on the superhydrophobic surface is replaced by a liquid barrier layer. Gas barrier layers cannot withstand harsh external environments as effectively as lubricating layers in liquid-infused porous surfaces. Therefore, compared with the superhydrophobic surface with metastable state, the slippery liquid injected porous surface obtained by liquid injection technique is more stable. Furthermore, the liquid-infused smooth porous surface exhibi...

Claims

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Application Information

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IPC IPC(8): B05D1/02B05D1/26B05D3/02B05D5/08B05D1/38B05D7/14B05D7/24C09D1/00C09D7/62C09D5/08C09D183/04
CPCB05D1/02B05D7/14B05D7/24B05D7/52B05D5/08B05D3/0254B05D1/26C09D1/00C09D7/62C09D5/08C09D183/04B05D2202/20
Inventor 李健石国贵龙一飞
Owner NORTHWEST NORMAL UNIVERSITY
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