Graphene-reinforced superhydrophobic finish-coat paint and preparation method thereof

A technology of graphene and water cover, applied in the field of coatings, which can solve the problems of mechanical properties of superhydrophobic coatings such as hardness, adhesion, impact resistance, poor abrasion resistance, high coating curing temperature, complex process, etc., to achieve improved hydrophobicity Performance, good weather resistance, good mechanical properties

Active Publication Date: 2017-05-10
ASIA PAINT SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The superhydrophobic coatings formed by these two methods have the disadvantages of poor mechanical properties (such as hardness, adhesion, impact resistance, abrasion resistance)
In addition, the existing methods for forming superhydrophobic coatings have disadvantages such as complicated process and high coating curing temperature.

Method used

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  • Graphene-reinforced superhydrophobic finish-coat paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The graphene-enhanced superhydrophobic finish paint of the present invention comprises components and the percentage by weight of each component are: 40% of fluorocarbon emulsion, 10% of nano-silica sol, 0.15% of dispersant, 0.1% of defoamer, propylene glycol 0.5%, graphene oxide 0.1%, film-forming aid 0.3%, deionized water 48.85%.

[0029] Add 70 parts of silica sol to the three-necked flask, adjust the pH within the set range with hydrochloric acid, and stir evenly at a low speed; slowly add 30 parts of epoxy silane into the three-necked flask drop by drop, and heat in a water bath. After the reaction is completed, epoxy Silane-based modified silica sol, that is, nano-silica sol.

[0030] Place the graphite powder in the mixed acid, after fully stirring, repeatedly wash and dry with deionized water, remove impurities to obtain clean graphite; heat and stir the mixed solution of concentrated sulfuric acid, oxidant, and the clean graphite to obtain a dark blue mixture; ...

Embodiment 2

[0033] The graphene-enhanced superhydrophobic finish paint of the present invention comprises components and the percentage by weight of each component are: 50% of fluorocarbon emulsion, 30% of nano-silica sol, 3% of dispersant, 1% of defoamer, propylene glycol 2%, graphene oxide 0.5%, film-forming aid 2%, deionized water 11.5%.

[0034] Add 95 parts of silica sol to the three-necked flask, adjust the pH within the set range with hydrochloric acid, and stir evenly at a low speed; slowly add 5 parts of epoxy silane into the three-necked flask drop by drop, heat in a water bath, and after the reaction is completed, epoxy Silane-based modified silica sol, that is, nano-silica sol.

[0035] Place the graphite powder in the mixed acid, after fully stirring, repeatedly wash and dry with deionized water, remove impurities to obtain clean graphite; heat and stir the mixed solution of concentrated sulfuric acid, oxidant, and the clean graphite to obtain a dark blue mixture; The mixtur...

Embodiment 3

[0038] The graphene-enhanced superhydrophobic finish paint of the present invention comprises components and the percentage by weight of each component are: 45% of fluorocarbon emulsion, 20% of nano-silica sol, 1% of dispersant, 0.5% of defoamer, propylene glycol 1%, graphene oxide 0.3%, film-forming aid 1%, deionized water 31.2%.

[0039] Add 80 parts of silica sol to the three-necked flask, adjust the pH within the set range with hydrochloric acid, and stir evenly at a low speed; slowly add 20 parts of epoxy silane into the three-necked flask drop by drop, heat in a water bath, and after the reaction is completed, epoxy Silane-based modified silica sol, that is, nano-silica sol.

[0040] Place the graphite powder in the mixed acid, after fully stirring, repeatedly wash and dry with deionized water, remove impurities to obtain clean graphite; heat and stir the mixed solution of concentrated sulfuric acid, oxidant, and the clean graphite to obtain a dark blue mixture; The mix...

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Abstract

The invention provides a graphene-reinforced superhydrophobic finish-coat paint and a preparation method thereof. The graphene-reinforced superhydrophobic finish-coat paint comprises the following components in percentage by weight: 40-50% of fluorocarbon emulsion, 10-30% of nano silica sol, 0.15-3% of dispersing agent, 0.1-1% of defoaming agent, 0.5-2% of propanediol, 0.1-0.5% of graphene oxide, 0.3-2% of film forming aid and the balance of deionized water. The graphene-reinforced superhydrophobic finish-coat paint provided by the invention has favorable scratch resistance, favorable weather resistance, favorable water resistance, favorable acid / alkali resistance and favorable pollution resistance. The graphene-reinforced superhydrophobic finish-coat paint can shield ultraviolet light and implement sterilization, and thus, is nontoxic, environment-friendly and safe. The finish paint has high glossiness and favorable color development property, can effectively protect the undercoat for a long time, can keep the internal and external walls of the building new for a long time, and overcomes the effects in the prior art.

Description

technical field [0001] The invention relates to the field of coatings, more specifically, to a graphene-enhanced superhydrophobic finish paint and a preparation method thereof. Background technique [0002] Water-based fluorocarbon coatings have been widely used in building exterior wall finishes because of their excellent weather resistance, acid and alkali resistance, stain resistance, and high permeability. Although the overall performance is significantly better than other conventional finishes, it is scratch-resistant Scratchability, water resistance, and self-cleaning performance cannot fully meet the requirements, and the market needs new products with waterproof, high strength, and excellent self-cleaning functions. [0003] Inspired by the special wettability of the surfaces of many organisms in nature, such as lotus leaves and butterfly wings, the preparation and research of superhydrophobic interface materials have aroused widespread interest in the industry in re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/12C09D7/12C09D5/16C09D5/14
CPCC08K3/04C08K3/36C08K9/06C08K2201/011C09D5/14C09D5/1668C09D5/1687C09D127/12
Inventor 石小龙徐志新李金钟
Owner ASIA PAINT SHANGHAI
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