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Self-repairing water-based super-hydrophobic coating based on microcapsule type and preparing method thereof

A super-hydrophobic coating and microcapsule technology, which is applied in the direction of microcapsule preparation, microsphere preparation, coating, etc., can solve environmental pollution and other problems, and achieve the effect of no VOC emission, simple preparation process and low cost

Active Publication Date: 2016-08-24
绍兴江绵纺织品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although superhydrophobic coatings with self-healing functions can be prepared by various methods, it is inevitable to add organic solvents in these preparation processes and cause environmental pollution problems. Therefore, green preparation of self-healing superhydrophobic coatings is currently the Key issues to be addressed

Method used

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  • Self-repairing water-based super-hydrophobic coating based on microcapsule type and preparing method thereof
  • Self-repairing water-based super-hydrophobic coating based on microcapsule type and preparing method thereof
  • Self-repairing water-based super-hydrophobic coating based on microcapsule type and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041](1) In a 250mL beaker, first add 100mL of water and ethanol mixture (1:1 by volume) and 1.2 parts of heptadecafluorodecyltrimethoxysilane (FAS17), stir well and then add 4.5 parts of Al 2 o 3 Nanoparticles and 0.6 parts of ammonia water, after ultrasonication for 10 minutes, stirred and reacted at a temperature of 60 °C for 24 hours to obtain modified Al 2 o 3 Nanoparticles. Finally, the modified Al 2 o 3 The ethanol in the nanoparticle solution was rotary evaporated, and redispersed with 45mL deionized water for later use.

[0042] (2) Add 4 parts of styrene, 0.4 parts of divinylbenzene, 0.12 parts of azobisisobutyronitrile and 2 parts of FAS17 into a 250mL three-necked flask, stir well, then add 0.3 parts of sodium dodecylbenzenesulfonate and 200mL deionized water, sonication for 30min, and stirring at 70°C for 20h to obtain FAS17-coated microcapsules.

[0043] (3) the hydrophobic nanometer Al of step (1) gained 2 o 3 38 parts of aqueous solution, 25 parts of m...

Embodiment 2

[0045] (1) In a 250mL beaker, first add 130mL of water and ethanol mixture (volume ratio: 2:1) and 1.5 parts of tridecafluorooctyltriethoxysilane (FAS13), stir well, and then add 5 parts of gas phase two Silicon oxide and 1 part of ammonia water were ultrasonicated for 5 minutes, then stirred and reacted at a temperature of 65° C. for 20 hours to obtain modified silicon dioxide. Finally, the ethanol in the modified silica solution was rotary-evaporated, and re-dispersed with 50 mL of deionized water for later use.

[0046] (2) First add 24 parts of polystyrene solution (concentration: 25%, dichloromethane as solvent) and 4.5 parts of FAS13 in a 200mL single-necked flask, after stirring evenly, add 100mL of deionized water and 1.72 parts of dodecylbenzene Sodium sulfonate, then sonicate for 10 minutes, and then stir at 30°C for 6 hours to obtain coated FAS13 microcapsules.

[0047] (3) the hydrophobic nano-SiO obtained in step (1) 2 43 parts of aqueous solutions, 18 parts of ...

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Abstract

The invention relates to a self-repairing water-based super-hydrophobic coating. The durability aim of the surface performance of an existing super-hydrophobic coating is achieved, and the environment-friendly aim in the preparing process of a traditional super-hydrophobic coating is further achieved. The coating is prepared from, by weight, 10%-50% of aqueous film-forming resin, 5%-40% of microcapsule, 0.1%-10% of photocatalytic activity nanometer particles, 5%-40% of hydrophobicity nanometer particles and 10%-60% of deionized water. After the surface of the coating is subjected to physical abrasion or organic pollution, the microcapsule in the coating is fractured under the effect of photocatalytic degradation and releases fluoroalkyl silane, and the damaged surface is self-repaired, the super-hydrophobic performance of the coating is recovered, and therefore the durability when the coating is used outdoors is guaranteed. According to the self-repairing water-based super-hydrophobic coating, the method is simple, the preparing technology is environmentally friendly, and large-area construction is easy to achieve.

Description

technical field [0001] The invention belongs to the technical field of preparation of self-repairing super-hydrophobic coating materials, in particular to a microcapsule-based self-repairing water-based super-hydrophobic coating material and a preparation method thereof. Background technique [0002] The superhydrophobic surface (contact angle greater than 150° and rolling angle less than 10°) has very unique properties, so it has potential application value in many fields, such as self-cleaning, waterproof fabric, anti-icing, anti-corrosion and drag reduction. . However, the existing superhydrophobic surface rapidly fails due to factors such as sunlight, mechanical wear and organic pollution, which seriously affects its actual service life. In addition, the existing superhydrophobic coatings almost always use organic solvents to dissolve hydrophobic substances during the preparation process, which will cause environmental pollution and environmental protection problems dur...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D133/00C09D163/00C09D175/04C09D167/00C09D125/08C09D125/06C09D7/12B01J13/02
CPCB01J13/02C08K2201/011C09D7/62C09D7/70C09D183/04C08L25/08C08K9/06C08K2003/2227C08L25/06C08K3/36
Inventor 陈坤林张亮强思雨王潮霞殷允杰
Owner 绍兴江绵纺织品有限公司
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