A kind of super-amphiphobic coating and its preparation method and surface wettability conversion method

A conversion method, super-amphiphobic technology, used in coatings, special surfaces, devices for coating liquids on surfaces, etc., to achieve the effect of a wide range of wetting properties

Active Publication Date: 2021-09-28
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the technical problems existing in the prior art, the present invention provides a super-amphiphobic coating and its preparation method and surface wettability conversion method to solve the problem in the prior art that the super-amphiphobic coating cannot achieve A reversible switch between hydrophobicity and superamphipathicity

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  • A kind of super-amphiphobic coating and its preparation method and surface wettability conversion method
  • A kind of super-amphiphobic coating and its preparation method and surface wettability conversion method

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preparation example Construction

[0035] The invention provides a kind of preparation method of super amphiphobic coating, comprises the following steps:

[0036] Step 1, prepare super amphiphobic coating, specifically:

[0037] Step 11, weigh 0.5-2g of nano-SiO 2 and 0.25-1g of micron SiO 2 , added to 10-100mL of ethanol, stirred to obtain a uniform solution; wherein, nano-SiO 2 Using nano-SiO with a diameter of 16-25nm 2 ; Micron SiO 2 Using micron SiO with a diameter size of 5-50 μm 2 ; The stirring time is 5-20min, and the stirring speed is 200r / min.

[0038] Step 12, take 2-10mL ammonia water and 1-5mL deionized water, add to the homogeneous solution in step 11, stir to obtain a homogeneous mixture; the stirring time is 60-120min, the stirring speed is 200r / min; the concentration of ammonia water is 25 %;

[0039] Step 13, take 0.05-0.5mL tetraethyl orthosilicate, 0.05-1mL perfluorosilyl trimethoxysilane and 1-2mL varnish, add to the homogeneous mixture in step 12, stir until the solution has no ob...

Embodiment 1

[0047] The invention provides a kind of preparation method of super amphiphobic coating, comprises the following steps:

[0048] Step 1, prepare super amphiphobic coating, specifically:

[0049]Step 11, weigh 0.5g of nano-SiO 2 and 0.25g of micron SiO 2 , added to 10mL of ethanol, stirred to obtain a uniform solution; wherein, nano-SiO 2 Using nano-SiO with a diameter of 16-25nm 2 ; Micron SiO 2 Using micron SiO with a diameter size of 5-50μm 2 ; Stirring time is 5min, stirring rate is 300r / min.

[0050] Step 12. Take 2 mL of ammonia water and 1 mL of deionized water, add them to the homogeneous solution in step 11, and stir to obtain a homogeneous mixture; the stirring time is 120 min, and the stirring speed is 100 r / min; the concentration of ammonia water is 25%;

[0051] Step 13, take 0.05mL tetraethyl orthosilicate, 0.05mL perfluorosilyltrimethoxysilane and 1mL varnish, add to the homogeneous mixture in step 12, stir until the solution has no obvious layering and is ...

Embodiment 2

[0060] The invention provides a kind of preparation method of super amphiphobic coating, comprises the following steps:

[0061] Step 1, prepare super amphiphobic coating, specifically:

[0062] Step 11, weigh 1g of nano-SiO 2 and 0.5 g of micron SiO 2 , added to 50mL of ethanol, stirred to obtain a uniform solution; wherein, nano-SiO 2 Using nano-SiO with a diameter of 16-25nm 2 ; Micron SiO 2 Using micron SiO with a diameter size of 25 μm 2 ; Stirring time is 10min, stirring rate is 250r / min.

[0063] Step 12, take 2mL ammonia water and 2.5mL deionized water, add to the homogeneous solution in step 11, stir to obtain a homogeneous mixture; the stirring time is 60min, the stirring speed is 300r / min; the concentration of ammonia water is 25%;

[0064] Step 13, take 0.25mL tetraethyl orthosilicate, 0.5mL perfluorosilyl trimethoxysilane and 1.5mL varnish, add to the homogeneous mixture in step 12, and stir until the solution has no obvious layering and is uniform; stirring...

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Abstract

The invention discloses a super-amphiphobic coating, a preparation method thereof, and a surface wettability conversion method. The super-amphiphobic coating is prepared, and the super-amphiphobic coating is coated on the surface of a substrate by a spraying process, and cured to obtain a super-amphiphobic coating. layer; when the surface wettability is converted, the substrate coated with the super-amphiphobic coating is placed between the two electrode plates, and the bottom electrode plate is placed on the heating device; the two electrode plates are respectively connected to the DC The positive and negative poles of the power supply are connected; charge-heating-power-off-heating is repeatedly injected into the super-amphiphobic coating to realize the reversible conversion of the surface wettability of the super-amphiphobic coating; by spraying and mixing the prepared solution, a A composite micro-nano structure super amphiphobic structure, the micro-nano composite structure is beneficial to charge injection and retention, and can meet the conversion of surface wettability; under the co-stimulation of DC electric field and temperature rise, charges are injected and Accumulated on the solid surface, the charge accumulates on the solid surface to achieve a change in surface wettability.

Description

technical field [0001] The invention belongs to the technical field of superhydrophobic and superoleophobic coatings, in particular to a superamphiphobic coating, a preparation method thereof and a surface wettability conversion method. Background technique [0002] Functional surfaces with switchable wettability have attracted extensive attention in recent years due to their potential applications in drug release, microfluidic devices, catalytic reactions, energy storage, self-cleaning coatings, oil-water separation, etc. This switching is usually based on external physical and chemical stimuli to change the surface wetting behavior; the most common external physical stimuli is electrowetting, that is, one end of the power supply is connected to the electrode plate, and the other end is inserted into the surface of the electrode plate through a wire In water droplets, and by switching on and off the power supply, the electrowetting change of the electrode plate is realized;...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D201/00C09D183/02C09D183/08C09D7/61B05D5/08B05D7/26
CPCB05D5/08B05D7/26C08K2201/011C08K2201/014C08L2205/02C08L2205/03C09D201/00C09D7/61C08L83/02C08L83/08C08K3/36
Inventor 叶向东侯俊文
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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