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Transparent super-amphiphobic surface layer and layer-by-layer in-situ spraying reaction preparation method

A super-amphiphobic surface, transparent technology, applied to the surface coating device, special surface, coating and other directions, can solve the problems of inability to large-scale application, high comprehensive production cost, high equipment requirements, to eliminate phase separation phenomenon, the effect of improving transparency and improving mechanical properties

Active Publication Date: 2016-04-20
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these reports can obtain transparent or super-amphiphobic or transparent super-amphiphobic coatings, the process is cumbersome, the operation is complicated, the equipment requirements are high, the raw materials are expensive, the base material is single, energy consumption is time-consuming, the controllability is poor, and the overall production cost High, cannot be applied on a large scale

Method used

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  • Transparent super-amphiphobic surface layer and layer-by-layer in-situ spraying reaction preparation method
  • Transparent super-amphiphobic surface layer and layer-by-layer in-situ spraying reaction preparation method
  • Transparent super-amphiphobic surface layer and layer-by-layer in-situ spraying reaction preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Add the hydrophobic transparent fluorocarbon resin and its corresponding curing agent into the compatible solvent ethyl acetate, and disperse for 5 minutes under the condition of ultrasonic frequency of 40kHz until the resin is completely dissolved to obtain a primer resin solution with a concentration of 5mg / mL. Add hydrophilic fumed silica with a diameter of 15-40nm into ethanol, and sonicate for 15min to form a nanoparticle solution with a concentration of 10mg / mL. That is, the required primer spraying liquid and topcoat nano particle spraying liquid are obtained.

[0040] (2) Primer coating spraying: wipe the glass slide with a clean cotton cloth, and dry it at room temperature. Use a commercial spray gun with a nozzle diameter of 0.5-2mm, use compressed air as the carrier, adjust the spray spot to a fan shape, the nozzle is 10-20cm away from the surface to be sprayed on the substrate, and move from left to right at a speed of 2-5cm / s from top to bottom Spray t...

Embodiment 2

[0044] (1) Add transparent acrylate and polyurethane to acetone in turn, disperse for 30 minutes under 40kHz frequency ultrasonic conditions until the resin is completely dissolved, add curing agent polyisocyanate, stir for 10 minutes, and obtain a primer resin solution with a concentration of 20mg / mL. Add hydrophilic fumed silica with a diameter of 15-40 nm into ethanol, and ultrasonicate for 5 min to form a nanoparticle solution with a concentration of 5 mg / mL. That is, the required primer spraying liquid and topcoat nano particle spraying liquid are obtained.

[0045] (2) Primer coating spraying: Wipe the metal copper sheet with a clean cotton cloth, wash off the surface oil with deionized water and ethanol, and dry at room temperature. Use a commercial spray gun with a nozzle diameter of 0.5-2mm, use compressed air as the carrier, adjust the spray spot to a fan shape, the nozzle is 10-20cm away from the surface to be sprayed on the substrate, and move from left to right at...

Embodiment 3

[0049] (1) Add epoxy resin to ethanol, disperse for 30 minutes under 40kHz frequency ultrasonic conditions until the resin is completely dissolved, add curing agent ethylenediamine, stir for 15 minutes, and obtain a primer resin solution with a concentration of 10 mg / mL. Add hydrophilic fumed silica with a diameter of 15-40 nm into ethanol, and ultrasonicate for 40 min to form a nanoparticle solution with a concentration of 20 mg / mL. That is, the required primer spraying liquid and topcoat nano particle spraying liquid are obtained.

[0050] (2) Spraying of the primer coating: Wipe the plastic PET sheet with a clean cotton cloth, wash off the surface oil with deionized water and ethanol, and dry at room temperature. Use a commercial spray gun with a nozzle diameter of 0.5-2mm, use compressed air as the carrier, adjust the spray spot to a fan shape, and the nozzle is 10-20cm away from the surface to be sprayed on the substrate, from left to right at a speed of 2-5cm / s from top ...

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Abstract

The invention relates to a transparent super-amphiphobic surface layer and a layer-by-layer in-situ spraying reaction preparation method. The method comprises the steps of sequentially spraying priming paint solutions and finishing paint solutions on a base body in a layer-by-layer in-situ mode through a spraying gun and by adopting the same spraying technology, sequentially spraying acetic acid water solutions of 1 wt.% and fluorine-silicane solutions of 0.1-2 wt.%, carrying out curing at normal temperature and then obtaining a transparent super-amphiphobic surface. The priming paint solutions are obtained by adding hydrophobic transparent resin and corresponding curing agents into soluble solvents and then dispersing the mixtures ultrasonically until the resin is completely dissolved; the finishing paint solutions are obtained by adding hydrophilic fumed silica into ethyl alcohol and forming solutions ultrasonically. According to the invention, the preparation technology for needed coatings is simple, the spraying technology is easy and convenient to operate, coatings are super-hydrophobic, super-oleophobic and highly transparent, and the application prospect is wide in the fields of solar panels, glasses and automobile windshield glass.

Description

technical field [0001] The invention relates to a simple technique for preparing a transparent super-amphiphobic surface by layer-by-layer in-situ spraying. Background technique [0002] In recent years, superhydrophobic surfaces have become a hot spot and focus in the field of material surface science. Because of their unique self-cleaning effect similar to lotus leaves, they have important research value in anti-fog, anti-icing, anti-fouling, oil-water separation, etc. and application prospects. [0003] At present, there are many methods for preparing superhydrophobic surfaces. Such as electrospinning, stencil printing, photochemical method, steam-induced phase separation method, sol-gel method, vapor deposition method, etching method, etc. The basic principle of these methods is to construct a micro-nano rough structure on the surface of the material, and then modify the low surface energy substance to reduce the surface free energy, thereby forming superhydrophobicity...

Claims

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Application Information

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IPC IPC(8): B05D1/38B05D5/00C09D127/12C09D163/00C09D1/00
CPCB05D1/38B05D5/00B05D7/52B05D2503/00B05D2504/00B05D2506/10B05D2601/22C09D1/00C09D127/12C09D163/00B05D2420/01B05D2420/02
Inventor 张友法朱海燕余新泉
Owner SOUTHEAST UNIV
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