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Method for preparing nano ZnO-GO/waterborne polyurethane super-amphiphobic coating through spraying method

A water-based polyurethane, spraying technology, applied in the field of materials, can solve the problems of loss of super-hydrophobic properties, damage, etc., and achieve the effects of low reaction equipment requirements, strong adhesion, and no environmental pollution

Active Publication Date: 2019-04-19
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fine rough structure and low surface energy substances on the superhydrophobic surface are easily damaged by mechanical effects such as impact and friction during processing and use, thus losing superhydrophobic properties.

Method used

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  • Method for preparing nano ZnO-GO/waterborne polyurethane super-amphiphobic coating through spraying method
  • Method for preparing nano ZnO-GO/waterborne polyurethane super-amphiphobic coating through spraying method
  • Method for preparing nano ZnO-GO/waterborne polyurethane super-amphiphobic coating through spraying method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Weigh 1.6 g of ZnO (30 nm grade) and disperse it in 40 mL of absolute ethanol, and add 0.2 mL of perfluorooctyltrichlorosilane and 10 drops of H 2 O, and magnetically stirred for 30 min to obtain solution A; weigh 0.1 g of GO and disperse it in 25 mL of absolute ethanol, and ultrasonically treat it for 30 min to form a uniformly dispersed suspension B; mix solution A and suspension B to obtain solution C, heating in a water bath at 60 °C, magnetic stirring for 6 h; washing with deionized water and absolute ethanol for 2-3 times, and suction filtration to obtain nano-ZnO-GO composites, vacuum drying at 80 °C for 12 h, and grinding for later use. Weigh an appropriate amount of water-based polyurethane A and B components in a ratio of 5:1, stir evenly, and cure at room temperature for 30 minutes, then spray on the surface of the treated aluminum substrate, spray two layers, and construct a water-based polyurethane coating; the prepared The nano-ZnO-GO composite was added t...

Embodiment 2

[0037] Weigh 1.6 g of ZnO (30 nm grade) and disperse it in 40 mL of absolute ethanol, and add 0.2 mL of perfluorooctyltrichlorosilane and 10 drops of H 2 O, and magnetically stirred for 30 min to obtain solution A; weigh 0.1 g of GO and disperse it in 25 mL of absolute ethanol, and ultrasonically treat it for 30 min to form a uniformly dispersed suspension B; mix solution A and suspension B to obtain solution C, heating in a water bath at 60 °C, magnetic stirring for 6 h; washing with deionized water and absolute ethanol for 2-3 times, and suction filtration to obtain nano-ZnO-GO composites, vacuum drying at 80 °C for 12 h, and grinding for later use. Weigh an appropriate amount of water-based polyurethane A and B components in a ratio of 5:1, stir evenly, and cure at room temperature for 30 minutes, then spray on the surface of the treated aluminum substrate, spray two layers, and construct a water-based polyurethane coating; the prepared The nano-ZnO-GO composite was added t...

Embodiment 3

[0039] Weigh 1.6 g of ZnO (30 nm grade) and disperse it in 40 mL of absolute ethanol, and add 0.2 mL of perfluorooctyltrichlorosilane and 10 drops of H 2O, and magnetically stirred for 30 min to obtain solution A; weigh 0.1 g of GO and disperse it in 25 mL of absolute ethanol, and ultrasonically treat it for 30 min to form a uniformly dispersed suspension B; mix solution A and suspension B to obtain solution C, heating in a water bath at 60 °C, magnetic stirring for 6 h; washing with deionized water and absolute ethanol for 2-3 times, and suction filtration to obtain nano-ZnO-GO composites, vacuum drying at 80 °C for 12 h, and grinding for later use. Weigh an appropriate amount of water-based polyurethane A and B components in a ratio of 5:1, stir evenly, and cure at room temperature for 30 minutes, then spray on the surface of the treated aluminum substrate, spray two layers, and construct a water-based polyurethane coating; the prepared The nano-ZnO-GO composite was added to...

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Abstract

The invention discloses a method for preparing a nano ZnO-GO / waterborne polyurethane super-amphiphobic coating through a spraying method. An ultrasonic hydrothermal composite method is adopted, nano zinc oxide is modified through perfluorooctyl trichlorosilane, then the modified nano ZnO carries GO, and nano ZnO-GO composite substance is obtained; a waterborne polyurethane layer is prepare on thesurface of a substrate; then a low-surfacce-energy nano ZnO-GO composite substance layer is established on the surface of the waterborne polyurethane layer; and after coating curing is finished, the surface topography and the static contact angle of a cured coating are tested. By means of the method, the surface energy of the nano zinc oxide is lowered, the surface hydrophobicity and lipophobicityof the nano ZnO-GO composite substance layer after fluoridation treatment are improved, the super-amphiphobic effect is achieved, and the stability of the coating is improved. The method is low in production cost, the preparation method is simple, the requirement for a reaction facility is low, the reaction conditions are mild, no environmental pollution occurs, and large-scale production can beachieved.

Description

technical field [0001] The invention belongs to the technical field of materials, and relates to a preparation method of a nanometer ZnO-GO / waterborne polyurethane superamphiphobic coating. Background technique [0002] In recent years, scholars at home and abroad have been inspired by the "lotus leaf effect", and superhydrophobic surfaces have aroused extensive interest of researchers. The main research idea is to introduce inorganic nano-rough structures on the surface of metal substrates and modify low surface energy substances. The preparation methods mainly include sol-gel method, hydrothermal method, layer-by-layer self-assembly method, chemical vapor deposition method, spray coating method and surface grafting. Copolymerization etc. [0003] Generally speaking, the current research mainly focuses on the following areas: (1) The study of plants and animals with superhydrophobic surfaces in nature provides inspiration for the development of materials with new surface s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/08B05D7/00B05D7/14C09D1/00
CPCC09D1/00B05D5/08B05D7/14B05D7/58B05D2503/00B05D2420/01B05D2420/02
Inventor 谢婵唐陈云李长全欧军飞薛名山王法军李文
Owner NANCHANG HANGKONG UNIVERSITY
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