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A patterned wetting differential surface, preparation method and application of alkali etching

A patterning and alkali etching technology, applied in the direction of coating, etc., can solve the problems of time and energy consumption, cumbersome steps, high equipment cost, etc., achieve the effect of no equipment and consumables, broaden the application range, and the method is simple and easy

Active Publication Date: 2022-03-11
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing technologies rely on expensive equipment and consumables, such as plasma processors and femtosecond laser technology, the cost of equipment is extremely high, and techniques such as photografting and photolithography require photoresist And expensive consumables such as micromasks limit the richness and precision of designable patterns and the large-scale preparation of large-scale samples. At the same time, there are also problems such as cumbersome steps, time-consuming and energy-consuming, and easy generation of solid and gas pollutants.
These have hindered the widespread industrial promotion and application of patterned wetting differential surfaces

Method used

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  • A patterned wetting differential surface, preparation method and application of alkali etching
  • A patterned wetting differential surface, preparation method and application of alkali etching
  • A patterned wetting differential surface, preparation method and application of alkali etching

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preparation example Construction

[0032] A preparation method for alkali etching of a patterned wetting differential surface, comprising the following steps:

[0033] Step 1: Use a pretreatment agent to draw a designed pattern on the polymer surface to obtain a pre-patterned surface;

[0034] First, clean and dry the surface of the alkali-degradable polymer. The selected polymer raw material can also be directly processed into films, sheets, and blocks, and the selected polymer material can also be used as a coating to coat other metals. , Fabric, wood, glass and other substrate surfaces form a coating as a pre-etched surface.

[0035] The polymer is a material with alkali degradability, preferably cellulose acetate, cellulose triacetate, polyester, polyurethane, epoxy resin, phenolic resin, urea-formaldehyde resin, melamine resin, alkyd-polymer A composite material composed of one or two or more of ester resins and polylactic acids in any proportion.

[0036] In order to have good writing properties on the ...

Embodiment 1

[0043] Follow the steps below to prepare a patterned wetting differential surface:

[0044] Step 1: Use water-soluble dye as a pretreatment agent to draw a designed pattern on the polymer surface to obtain a pre-patterned surface;

[0045]Before drawing the design pattern, the surface of the polymer needs to be treated first, and the treatment process is as follows: 4g of cellulose triacetate is added to 96g of dichloromethane solution. Stir to completely dissolve the cellulose triacetate until the solution is clear and transparent, then sonicate for 30 minutes to remove air bubbles, and obtain a casting solution with a mass fraction of 4 wt%. Weigh 10 g of the prepared cellulose triacetate casting solution into a glass petri dish with a diameter of 75 mm, and let it dry naturally to form a film. Then spray a layer of ink on the surface of the prepared cellulose triacetate film.

[0046] Step 2: Treat the pre-patterned surface obtained in step 1 with lye, perform partial etc...

Embodiment 2

[0050] Follow the steps below to prepare a patterned wetting differential surface:

[0051] Step 1: Use water-soluble dye as a pretreatment agent to draw a designed pattern on the polymer surface to obtain a pre-patterned surface;

[0052] Before drawing the design pattern, the surface of the polymer needs to be treated first, and the treatment process is as follows: 4g of cellulose triacetate is added to 96g of dichloromethane solution. Stir to completely dissolve the cellulose triacetate until the solution is clear and transparent, then sonicate for 30 minutes to remove air bubbles, and obtain a casting solution with a mass fraction of 4 wt%. Weigh 10 g of the prepared cellulose triacetate casting liquid into a glass petri dish with a diameter of 75 mm, and then place it in a water drop template device. After standing for 2 to 3 hours, a surface with a porous structure can be obtained. Due to the porous structure, Light is diffusely reflected, so macroscopically appears whi...

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Abstract

The invention discloses a preparation method and application of a patterned wetting difference surface and alkali etching, comprising the following steps: Step 1: using a pretreatment agent to draw a designed pattern on a polymer surface to obtain a pre-patterned surface; Step 2: The pre-patterned surface obtained in step 1 is treated with lye, partially etched, washed and dried to obtain the desired patterned surface with different wettability. The present invention is based on the degradation behavior of polymers in lye. During the degradation process, chemical groups or morphology changes will occur in polymer materials, thereby realizing surface wettability regulation; using the affinity of pretreatment agent and lye , induce alkali to quickly infiltrate the surface in the pre-patterned area, promote the full contact between the alkali and the specific surface of the material, and accelerate the degradation of the pre-patterned area, so that the degradation of the pre-patterned area is different from that of the surrounding area to form a differential etching, thereby preparing a patterned wet Humidity difference, the method is simple and easy, green and environmentally friendly, without expensive equipment and consumables.

Description

technical field [0001] The invention relates to the technical field of surface modification of polymer materials, in particular to a preparation method and application of a patterned wetting differential surface and alkali etching. Background technique [0002] In recent years, with the continuous deepening of interdisciplinary research and the continuous development of micro-fine processing technology, patterned wetting differential surfaces based on desert beetles have been manufactured and applied in large numbers. Patterned wettability differential surfaces exhibit unique properties such as controlled wetting, anisotropic wetting, directional adhesion, etc., by precisely controlling local wettability on a single surface. Therefore, patterned wetting differential surfaces are also widely used in various basic research and industrial applications, such as water vapor condensation and collection, thermal management, liquid manipulation, cell culture, printing technology, bi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/12C08J7/14C08J9/38C08J9/40C08J9/36
CPCC08J7/12C08J7/14C08J9/38C08J9/40C08J9/365
Inventor 王玉忠冯蕊宋飞庄金燕张潆丹
Owner SICHUAN UNIV