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Method for forming superhydrophobic surface of solid material

A technology of super-hydrophobic surface and solid material, which is applied in the field of formation of super-hydrophobic surface of solid material, can solve the problems of complex process and equipment requirements, degraded super-hydrophobic performance, and insufficiently low surface energy, etc., and achieves easy operation, low cost, good structural quality

Inactive Publication Date: 2006-05-24
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some of the above-mentioned methods still have many limitations: the general process of constructing rough surface structure and chemical reaction to form hydrophobic film is relatively complicated, and requires special equipment and materials; the materials directly coated on the surface generally contain Fluorine organic matter does not meet the requirements of environmentally friendly development, and the use of other organic coatings often leads to a decrease in superhydrophobic performance due to insufficient low surface energy; at the same time, the combination of the above two methods usually has better superhydrophobic performance, but the process Process and equipment requirements are also more complex
At present, there is no literature report on the method of superhydrophobic modification of the surface of solid materials using soft printing technology.

Method used

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  • Method for forming superhydrophobic surface of solid material
  • Method for forming superhydrophobic surface of solid material
  • Method for forming superhydrophobic surface of solid material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Step 1: Make a micro-nano structure negative mold soft stamp with a super-hydrophobic surface:

[0031] Mix the prepolymer and crosslinking agent of polydimethylsiloxane (PDMS, purchased from Dow Corning Company) uniformly in a mass ratio of 10:1, pour it on the clean and flat lotus leaf surface, and let it stand for 20 minutes. It becomes an elastomer after heating and curing. The reaction temperature is 40°C and the reaction time is 3 hours; After curing, the PDMS soft stamp can be obtained by peeling off.

[0032] Step 2: Fabricate superhydrophobic surfaces on solid materials:

[0033] A bisphenol A type epoxy resin was dissolved in tetrahydrofuran (THF) to prepare a solution at a concentration of 10 mg / ml as the polymer-containing "ink". Dip the "ink" with the PDMS soft stamp prepared above, and stamp it on the surface of the glass substrate; or drop a small amount of the above "ink" on the surface of the glass substrate, and then stamp it on the "ink" with the PD...

Embodiment 2

[0035] Mix the prepolymer of polydimethylsiloxane and the crosslinking agent evenly according to the mass ratio of 5:1, pour it on the clean and flat surface of the lotus leaf, let it stand for 10 minutes, and become an elastomer after heating and curing. 50°C, the reaction time is 3 hours; or after pouring, let it stand at room temperature for 10 hours to let it solidify naturally. After curing, the PDMS soft stamp was obtained by peeling off.

[0036] A kind of bisphenol A type epoxy resin derivative, epoxy resin-based azo polymer (see below for structural formula) is dissolved in tetrahydrofuran (THF) to make a solution, the concentration is 2 mg / ml, as the " ink". Dip the "ink" with the PDMS soft stamp prepared above, and stamp it on the surface of the glass substrate; or drop a small amount of the above "ink" on the surface of the glass substrate, and then stamp it on the "ink" with the PDMS soft stamp. Keep the soft stamp in contact with the material surface for second...

Embodiment 3

[0040] Mix the prepolymer of polydimethylsiloxane and the crosslinking agent evenly according to the mass ratio of 7:1, pour it on the clean and flat lotus leaf surface, let it stand for 20 minutes, and become an elastomer after heating and curing. 35°C, the reaction time is 7 hours; or after pouring, let it stand at room temperature for 10 hours to let it solidify naturally. After curing, the PDMS soft stamp was obtained by peeling off.

[0041] Polyamide epoxy resin was dissolved in tetrahydrofuran (THF) to prepare a solution at a concentration of 9 mg / ml as the polymer-containing "ink". Use the PDMS soft stamp prepared above to dip the "ink" and imprint it on the surface of the quartz substrate; or drop a small amount of the above "ink" on the surface of the quartz substrate, and then use the PDMS soft stamp to imprint on the "ink". Keep the soft stamp in contact with the material surface for seconds to minutes. After the solvent is completely evaporated, the soft seal is...

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Abstract

The present invention relates to a method for forming superhydrophobic surface of solid material, belonging to the field of solid material surface modification technology. Said method includes the following steps: firstly, uniformly mixing performed polymer and cross-linking agent according to a certain mass ratio, pouring the obtained mixture onto the superhydrophobic surface, standing still, then heating, solidifying and stripping to obtain elastic soft stamp; dissolving soluble polymer material in solvent, then using prepared elastic soft stamp to stamp the above-mentioned solution on the surface of solid material.

Description

technical field [0001] The invention relates to a method for forming a super-hydrophobic surface of a solid material, and belongs to the technical field of surface modification of solid materials. Background technique [0002] Superhydrophobic surface is a surface with special wettability, and this kind of special surface has attracted people's attention. The so-called super-hydrophobic surface generally refers to a surface whose contact angle with water is greater than 150°. The superhydrophobic surface has important characteristics such as waterproof, anti-fog, anti-oxidation, and self-cleaning. It has a very wide application prospect in many fields such as scientific research, production, and life. For example, it can be applied to lenses, optical devices, textiles, mechanical products, and pipelines. transport etc. There are two main methods for superhydrophobic modification of the surface of solid materials: one is to construct rough micro-nanostructures on the hydrop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/00
Inventor 刘斌和亚宁王晓工
Owner TSINGHUA UNIV
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