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Aqueous coating material capable of performing super-hydrophobicity repair through photothermal method, and preparation method thereof

A water-based coating, super-hydrophobic technology, applied in coatings, epoxy resin coatings, polyurea/polyurethane coatings, etc., to achieve the effect of restoring super-hydrophobic performance and simple preparation process

Inactive Publication Date: 2016-02-03
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of directly heating the coating with an external heating source is limited by factors such as the ambient temperature, the size of the substrate coated with the coating material, and whether it is convenient to disassemble in actual operation.

Method used

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  • Aqueous coating material capable of performing super-hydrophobicity repair through photothermal method, and preparation method thereof
  • Aqueous coating material capable of performing super-hydrophobicity repair through photothermal method, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A water-based coating material that can be repaired with superhydrophobic properties by photothermal method. The material is composed of water-based polyurethane resin with a mass fraction of 94.9%, 3% palygorskite, 2% polydopamine capsules coated with octadecylamine and 0.1 % of palladium nanoparticles that can produce photothermal effect.

[0024] The preparation method of above-mentioned water-based coating material is obtained by the following method:

[0025] (1) Palygorskite, octadecylamine, palladium nanoparticles and dopamine hydrochloride were added to the Tris-HCl solution with a pH value of 8.3, stirred for 12 hours, filtered, washed with water, washed with ethanol, and dried in vacuum to obtain palygorskite / Octadecylamine / palladium nanoparticle complex;

[0026] (2) Mix the palygorskite / stearylamine / palladium nanoparticle composite with water-based polyurethane evenly, add a curing agent, and spray it on the substrate to obtain the 1# sample.

[0027] The...

Embodiment 2

[0029] A water-based coating material that can be repaired with superhydrophobic properties by photothermal method. The material is composed of 80% water-based epoxy resin, 17.5% carbon nanotubes, and 0.5% polydopamine capsules coated with perfluorooctyl alcohol. And 2% ferric oxide nanoparticles that can produce photothermal effect.

[0030] The preparation method of above-mentioned water-based coating material is obtained by the following method:

[0031] (1) Add carbon nanotubes, perfluorooctyl alcohol, ferric iron tetroxide nanoparticles and dopamine hydrochloride to a Tris-HCl solution with a pH value of 8.5, stir for 24 hours, filter, wash with water, wash with ethanol, and vacuum dry. A carbon nanotube / perfluorooctyl alcohol / ferric oxide composite was obtained.

[0032] (2) Mix the carbon nanotube / perfluorooctyl alcohol / ferric iron tetroxide compound evenly with water-based epoxy resin, and spray it on the substrate to obtain the 2# sample.

[0033] The perfluorooctyl...

Embodiment 3

[0035] A water-based coating material that can be repaired with superhydrophobic properties by photothermal method. Composition of gold nanoparticles capable of generating photothermal effects.

[0036] The preparation method of above-mentioned water-based coating material is obtained by the following method:

[0037] (1) Add carbon nanotubes, perfluorooctanoic acid, gold nanoparticles and dopamine hydrochloride to a Tris-HCl solution with a pH value of 8.6, stir for 96 hours, filter, wash with water, wash with ethanol, and vacuum dry to obtain carbon nanotubes / perfluorooctanoic acid / gold nanoparticle composite.

[0038] (2) Mix the carbon nanotube / perfluorooctanoic acid / gold nanoparticle composite with water-based acrylic resin evenly, and spray it on the substrate to obtain the 3# sample.

[0039] The perfluorooctanoic acid on the surface of the water-based coating material that can be repaired by the photothermal method for super-hydrophobic performance is treated with p...

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PUM

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Abstract

The present invention discloses an aqueous coating material capable of performing super-hydrophobicity repair through a photothermal method, wherein the material comprises, by mass, 10-95% of an aqueous matrix resin, 3-80% of a filler producing a micro-nano structure, 0.5-20% of polydopamine capsules with low surface energy substance covering, and 0.1-30% of a nanoparticle filler capable of producing a photothermal effect. The present invention further discloses a preparation method of the coating material. The coating of the present invention has super-hydrophobicity and super-hydrophobicity repair performance under near infrared light irradiation.

Description

technical field [0001] The invention relates to a water-based coating material which can be repaired with superhydrophobic performance by a photothermal method, and also relates to a preparation method of the coating material, which belongs to the technical field of functional materials. Background technique [0002] Superhydrophobic coatings are widely used in the surface protection of materials due to their surface self-cleaning properties. As the requirements for the environmental protection performance of coatings are getting higher and higher, the application fields of water-based coating materials with superhydrophobic properties are also becoming wider and wider. Like solvent-based superhydrophobic coating materials, water-based superhydrophobic coating materials are also subject to the problems of complex preparation process and short retention time of superhydrophobic properties in practical applications. In the prior art, the coating practicability of the coating ...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D163/00C09D133/00C09D7/12
Inventor 周峰刘玉鹏刘志鲁于波胡海媛
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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