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All-lyophobic bionic anti-fouling self-cleaning coating and preparation method thereof

A self-cleaning coating, bionic antifouling technology, applied in antifouling/underwater coatings, coatings, paints containing biocides, etc., can solve the problems of difficult large area preparation, long cycle, harsh conditions, etc. The effect of good performance, convenient operation and simple process

Active Publication Date: 2016-06-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Most of the existing literature reports use the infiltration method to prepare the surface of Nepenthes imitation, which needs to be prepared by complex methods (such as etching, electrochemical deposition, layer-by-layer self-assembly, etc.), involving specific equipment, harsh Conditions and long cycle, it is difficult to be used for large area preparation

Method used

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  • All-lyophobic bionic anti-fouling self-cleaning coating and preparation method thereof
  • All-lyophobic bionic anti-fouling self-cleaning coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Under the protection of nitrogen, mix the silane coupling agent, short fluorocarbon chain substituted silane coupling agent, silica sol and solvent at 30°C, add water dropwise while reacting, and hydrolyze and condense for 2 hours to obtain a hydrophobic coating; the above The components are in mass percentage, 3% silane coupling agent, 10% short fluorocarbon chain substituted silane coupling agent, 40% silica sol, 10% solvent and 37% water.

[0034] The hydrophobic coating prepared above was spin-coated on the surface of a glass slide, and heat-treated at 120° C. for 2 hours to obtain the first coating, which was a hydrophobic coating, and then soaked in the perfluorinated lubricant. By removing excess lubricating fluid, a fully lyophobic biomimetic antifouling self-cleaning coating is obtained.

[0035] In this example, the silane coupling agent is methyltriethoxysilane; the silica sol component is a silica propanol solution with a pH=2, a solid content of 50%, and a ...

Embodiment 2

[0037] Under the protection of nitrogen, mix the silane coupling agent, short fluorocarbon chain substituted silane coupling agent, silica sol and solvent at 40°C, add water dropwise while reacting, and hydrolyze and condense for 1 hour to obtain a hydrophobic coating; the above Components by mass percentage, silane coupling agent 6%, short fluorocarbon chain substituted silane coupling agent 6%, silica sol 25%, solvent 30% and water 33%.

[0038] The hydrophobic coating prepared above was spin-coated on the surface of a glass slide, and heat-treated at 120 ° C for 3 hours to obtain the first coating, which was a hydrophobic coating, and then soaked in the perfluorinated lubricant, By removing excess lubricating fluid, a fully lyophobic biomimetic antifouling self-cleaning coating is obtained.

[0039] In this example, the silane coupling agent is dimethyldimethoxysilane; the silica sol component is a silica isopropanol solution with a pH=3, a solid content of 30%, and a parti...

Embodiment 3

[0041] Under the protection of nitrogen, mix the silane coupling agent, short fluorocarbon chain substituted silane coupling agent, silica sol and solvent at 10°C, add water dropwise while reacting, and hydrolyze and condense for 5 hours to obtain a hydrophobic coating; the above Components by mass percentage, silane coupling agent 10%, short fluorocarbon chain substituted silane coupling agent 3%, silica sol 12%, solvent 21% and water 56%.

[0042] Spin-coat the hydrophobic coating prepared above onto the surface of the silicon wafer, and heat-treat it at 80°C for 5 hours to obtain the first coating, which is a hydrophobic coating. By removing excess lubricating fluid, a fully lyophobic bionic anti-fouling self-cleaning coating is obtained.

[0043]In this embodiment, the silane coupling agent is phenyltriethoxysilane; the silica sol component is a silica isopropanol solution with a pH=6, a solid content of 5%, and a particle size of 70nm; a short fluorocarbon chain The subs...

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Abstract

The invention discloses an all-lyophobic bionic anti-fouling self-cleaning coating and a preparation method thereof. Raw materials of the coating include two components: a first component includes, by mass, 3-10% of a silane coupling agent, 3-10% of a silane coupling agent substituted by a short fluoro-carbon chain, 10-40% of silicon sol, 10-30% of a solvent and 30-60% of water; and a second component being perfluoro lubricant oil. The preparation method includes the steps of performing sol-gel treatment to the first component to prepare a hydrophobic coating material, and coating a substrate therewith to form a nano / micro-structure coating; and infiltrating the surface of the coating with the second component, perfluoro lubricant oil, so that the coating has comprehensively lyophobic, anti-fouling, self-cleaning, frost and ice-coverage resistant, and self-repairing performances. The coating is suitable for large-area construction, has good durability and stability, is good in self-cleaning performance, and can be used on surfaces of glass, ceramic tiles, plastics, metals and the like.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a fully liquid-repellent bionic antifouling self-cleaning coating and a preparation method thereof. Background technique [0002] Biomimetic superhydrophobic surfaces have been a research hotspot in the past 20 years, and they have broad application prospects in antifouling, anti-icing, antibacterial, self-cleaning, etc. The lotus leaf is a natural superhydrophobic surface with a typical nano / micro composite structure. The microstructure of the lotus leaf surface can form a stable air-liquid interface layer, which makes water droplets roll off easily and has excellent non-staining properties. By simulating the microscopic surface structure of the lotus leaf, the surface is endowed with certain lyophobic and self-cleaning properties. [0003] Patent CN103084323A proposes a bionic structure based on metal foam with a super amphiphobic material with a micro...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D7/12C09D5/16C03C17/34
Inventor 张庆华韦存茜詹晓力陈丰秋
Owner ZHEJIANG UNIV
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