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Super-hydrophobic repairable aqueous coating material and preparation method thereof

A water-based coating, super-hydrophobic technology, applied in coatings, epoxy resin coatings, polyurea/polyurethane coatings, etc., can solve the problems of complex construction of micro-nano structures, achieve recovery of super-hydrophobic properties, and simple preparation process. Effect

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 construction of micro-nano structures in these technologies is still relatively complicated, and is mainly used in solvent-based coatings

Method used

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  • Super-hydrophobic repairable aqueous coating material and preparation method thereof
  • Super-hydrophobic repairable aqueous coating material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A water-based coating material with repairable superhydrophobic performance, which is composed of water-based polyurethane resin with a mass fraction of 95%, 3% palygorskite and 2% polydopamine capsules coated with octadecylamine.

[0022] Above-mentioned coating material is made by following method:

[0023] (1) Add palygorskite and stearylamine to the Tris-HCl solution of dopamine hydrochloride, the pH of the Tris-HCl solution is 8.3, the concentration of dopamine hydrochloride is 0.01mg / ml, stir for 12h, and filter , washed with water, washed with ethanol, and vacuum-dried to obtain palygorskite / octadecylamine complex;

[0024] (2) Mix the palygorskite / stearylamine compound and water-based polyurethane evenly to obtain the coating material, add curing agent, and spray it on the substrate to obtain the 1# sample.

[0025] After the octadecylamine on the surface of the above-mentioned super-hydrophobic repairable coating material is treated with plasma for 5s, it is p...

Embodiment 2

[0027] A water-based coating material with repairable superhydrophobic properties, characterized in that the material is composed of 80% water-based epoxy matrix resin, 15% carbon nanotubes and 0.5% polydopamine capsules coated with perfluorooctyl alcohol composition.

[0028] Above-mentioned waterborne coating material is made by following method:

[0029] (1) Add carbon nanotubes and perfluorooctanol to the Tris-HCl solution of dopamine hydrochloride, the pH value of the Tris-HCl solution is 8.5, the concentration of dopamine hydrochloride is 1mg / ml, stir for 12h, filter, Washing with water, washing with ethanol, and drying in vacuum to obtain a carbon nanotube / perfluorooctyl alcohol composite;

[0030] (2) Mix the carbon nanotube / perfluorooctyl alcohol compound and the water-based epoxy resin evenly to get the coating material, and spray it on the substrate to get the 2# sample.

[0031] After the perfluorooctyl alcohol on the surface of the above-mentioned super-hydropho...

Embodiment 3

[0033] A water-based coating material with repairable superhydrophobic performance is characterized in that the material is composed of a water-based acrylic matrix resin with a mass fraction of 10%, carbon nanotubes of 70% and polydopamine capsules coated with perfluorooctanoic acid 20%.

[0034] Above-mentioned waterborne coating material is made by following method:

[0035] (1) Add carbon nanotubes and perfluorooctanoic acid to Tris-HCl solution of dopamine hydrochloride, the pH value of Tris-HCl solution is 8.6, the concentration of dopamine hydrochloride is 10mg / ml, stir for 12h, filter, wash with water, ethanol Wash and dry in vacuum to obtain carbon nanotube / perfluorooctanoic acid composite;

[0036] (2) Mix the carbon nanotube / perfluorooctanoic acid compound and the water-based acrylic resin evenly to obtain the coating material, and spray it on the substrate to obtain the 3# sample.

[0037] The perfluorooctanoic acid on the surface of the above-mentioned super-hydr...

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Abstract

The present invention discloses a super-hydrophobic repairable aqueous coating material, which comprises, by mass, 10-95% of an aqueous matrix resin, 3-80% of a filler capable of producing a micro-nano structure, and 0.5-20% of polydopamine capsules with low surface energy substance covering. The invention further discloses a preparation method of the coating material. According to the present invention, the filler capable of producing the micro-nano structure is adopted, the low surface energy material substance and the dopamine hydrochloride are added to the Tris-HCl solution, stirring, filtering and washing are performed to prepare the filler / low surface energy substance complex, and the filler / low surface energy substance complex and the aqueous matrix resin are mixed to obtain the coating material. The coating of the present invention has characteristics of super-hydrophobicity and superhydrophobic self-repair property.

Description

technical field [0001] The invention relates to a repairable water-based coating material with superhydrophobic performance, 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 self-cleaning protection of material surfaces, and their self-cleaning properties are achieved based on the synergistic effect of micro-nano structures and low surface energy. The construction process of the micro-nano structure is complicated, which limits its large-scale application; the low surface energy substances on the surface of the coating are lost during use, which reduces its super-hydrophobic effect and causes the material to lose its self-cleaning performance; with more environmentally friendly With the rapid development of water-based coatings, the application of superhydrophobic properties in water-based coatings is increasing. In th...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D175/04C09D133/00C09D7/12
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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