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A double self-healing superhydrophobic coating and its preparation method

A super-hydrophobic coating and self-healing technology, which is applied in coatings and other directions, can solve the problems that it is difficult to obtain long-term self-healing super-hydrophobic coatings and affect the hydrophobicity of coatings

Active Publication Date: 2022-04-19
新化县中润化学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the emulsifier present in the microcapsule powder will inevitably affect the hydrophobic properties of the coating
[0007] All of the above self-healing solutions for super-hydrophobic coatings have failed to simultaneously address the storage stability of the repairing agent during coating use and the impact of the release carrier on the performance of super-hydrophobic coatings, so it is difficult to obtain a long-term self-healing Repaired superhydrophobic coating

Method used

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  • A double self-healing superhydrophobic coating and its preparation method
  • A double self-healing superhydrophobic coating and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Preparation of PFPE@PFA microspheres

[0032] Take 200 parts by mass of deionized water and add it to the flask, then add 2 parts by mass of polyvinyl alcohol 1799 to the flask, then add 8 parts by mass of PFPE and 30 parts by mass of dodecafluoroheptyl methacrylate under stirring at 75°C Ester, 0.5 parts by mass of divinylbenzene, 0.5 parts by mass of dibenzoyl peroxide (BPO), disperse at high speed for 30 minutes to form fine uniformly dispersed droplets in water, heat up to polymerize and maintain stability After reacting for 5 hours, filter with suction, wash with water, and blow dry at 80°C for 1 hour to obtain fluorine-containing acrylic resin-coated PFPE microspheres, namely PFPE@PFA microspheres.

[0033] 2) Preparation of PFPE@PFA-SiO 2 Microspheres

[0034] Add 20 parts by mass of PFPE@PFA to 90 parts by mass of 95% ethanol, then add 2 parts by mass of silane coupling agent KH-550 and 1 part of nano-SiO 2 , then stirred and reacted at 70°C for 2 hours, s...

Embodiment 2

[0040] 1) Preparation of PFPE@PFA microspheres

[0041] Take 200 parts by mass of deionized water and add it to the flask, then add 1.5 parts by mass of polyvinyl alcohol 1799 to the flask, then add 6 parts by mass of PFPE and 25 parts by mass of dodecafluoroheptyl methacrylate under stirring at 75°C Esters, 0.6 parts by mass of divinylbenzene, and 0.6 parts by mass of dibenzoyl peroxide (BPO) were reacted for 6 hours, filtered by suction, and washed to obtain PFPE@PFA microspheres.

[0042] 2) Preparation of PFPE@PFA-SiO 2 Microspheres

[0043] Add 18 parts by mass of PFPE@PFA to 95 parts by mass of 95% ethanol, then add 3 parts by mass of silane coupling agent KH-550 and 0.5 parts of nano-SiO 2 , and then stirred and reacted at 70°C for 2 hours, suction filtered, and air-dried at 70°C for 5 hours to obtain surface aminated hydrophobic PFPE@PFA-SiO 2 Microspheres.

[0044] 3) Preparation of self-healing superhydrophobic coatings

[0045] Take 70 parts by mass of fluoroca...

Embodiment 3

[0049] 1) Preparation of PFPE@PFA microspheres

[0050] Take 200 parts by mass of deionized water and add it to the flask, then add 3 parts by mass of polyvinyl alcohol 1799 to the flask, then add 10 parts by mass of PFPE and 35 parts by mass of dodecafluoroheptyl methacrylate under stirring at 75°C Ester, 0.8 parts by mass of divinylbenzene, 0.8 parts by mass of dibenzoyl peroxide (BPO), disperse at high speed for 30 minutes to form fine uniformly dispersed droplets in water, heat up to polymerize and maintain stability After reacting for 5 hours, filter with suction, wash with water, and blow dry at 75°C for 1 hour to obtain fluorine-containing acrylic resin-coated PFPE microspheres, namely PFPE@PFA microspheres.

[0051] 2) Preparation of PFPE@PFA-SiO 2 Microspheres

[0052] Add 25 parts by mass of PFPE@PFA to 100 parts by mass of 95% ethanol, then add 2 parts by mass of silane coupling agent KH-550 and 1 part of nano-SiO 2 , and then stirred and reacted at 70°C for 2 ho...

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Abstract

The invention discloses a double self-healing super-hydrophobic coating and a preparation method thereof, comprising the following components in parts by mass: 60-80 parts of hydrophobic resin, PFPE@PFA-g-SiO 2 Microsphere 1-20 parts, hydrophobic filler 10-15 parts, defoamer 0.01-0.05 parts, wetting agent 0.1-0.5 parts, deionized water 1-10 parts, amino resin 5-20 parts, adhesion promoter 1 ‑2 servings. The present invention adopts a double self-healing super-hydrophobic coating with the above structure and its preparation method, which can simultaneously solve the problem of the storage stability of the repairing agent during the use of the coating and the self-repairing of the micro-nano structure and the low surface area when the coating is damaged. It can release self-healing substances, and has super-hydrophobic long-term self-healing function.

Description

technical field [0001] The invention relates to the technical field of superhydrophobic coatings, in particular to a double self-repairing superhydrophobic coating and a preparation method thereof. Background technique [0002] Superhydrophobic coatings have great application prospects in self-cleaning, anti-corrosion, anti-icing, oil-water separation, etc. By analyzing the hydrophobic leaf surface structure of plants such as lotus leaves, the researchers found that the micro-nano structure and low surface energy of the material surface are two key factors to realize the super-hydrophobic surface. On this basis, people have realized the construction of various superhydrophobic coatings by making rough surfaces and combining materials such as fluorine / silicon. However, because the surface micro-nano structure is easily destroyed, most of the current superhydrophobic coatings have defects such as poor mechanical stability, poor durability, and poor chemical resistance. In or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D127/12C09D161/20C09D7/65C09D7/61C09D7/62
CPCC09D127/12C09D7/65C09D7/61C09D7/62C08K2003/265C08K2201/011C08L61/20C08L51/08C08K9/06C08K3/36C08K3/26
Inventor 宁旭涛张明王鹏
Owner 新化县中润化学科技有限公司