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Preparation method of anti-corrosion self-healing superhydrophobic material based on reversible hydrogen bond group

An anti-corrosion and self-healing technology, used in anti-corrosion coatings, cellulose coatings, polyamide coatings, etc., can solve the problems of high preparation cost, cumbersome preparation process, and reduced coating recycling ability, and achieves low cost, preparation simple method effect

Active Publication Date: 2022-03-04
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, coatings using chemical bonds to couple self-healing agents usually require additional stimuli, such as temperature, light, humidity, etc. to stimulate the self-healing ability of the coating; self-healing agent coatings coupled by electrostatic interactions are usually prepared The process is cumbersome and the preparation cost is high; self-healing agents that use physical storage are usually easy to evaporate and / or degrade, reducing the recyclability of the coating
So far, reports on hydrogen bond-based self-healing coatings have focused on the field of physical structure damage (such as cutting, scratching, etc.) of the healing coating, while after chemical damage, the chemical composition and superhydrophobicity of the coating surface The self-healing technology is still blank

Method used

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  • Preparation method of anti-corrosion self-healing superhydrophobic material based on reversible hydrogen bond group
  • Preparation method of anti-corrosion self-healing superhydrophobic material based on reversible hydrogen bond group
  • Preparation method of anti-corrosion self-healing superhydrophobic material based on reversible hydrogen bond group

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 10 ml of ammonia was added to a mixture containing 180 ml of ethanol, 20 ml of silicate and 20 ml of deionized water, stirred at room temperature for 12 hours, dried at 50 ° C to obtain silica nanoparticles, and the particle size was 35 ± 5 nm; 1 mL of octadecyclosoxysilane was added to 70 ml of ethanol containing 0.5 g of lignocellulose and 6 g of silica, and the suspension was 2 hours at 25 ° C. Ultrasound and stirring reaction, purifying the centrifugation granules was purified by ethanol, drying at room temperature, obtaining superhydrophobic micro / nanoparticles; 3 g of superhydrophilic powder added to a 3 g of epoxy resin and 2 g of a polyamide resin 80 ml of ethanol solution In seconds, ultrasonic treatment and magnetic force are stirred for 2 hours, and a uniform super-hydrophobic coating is finally obtained.

[0026] The superhydrophobic coating is applied to the metal aluminum surface by spraying, and the spray process is sprayed for 30 seconds under pressure of ...

Embodiment 2

[0030] Different from Example 1 in:

[0031] Further hydrophobic modifications were further impregnated in ethanol solution containing 0.25 wt% octadecyclosoxysilane.

[0032] After testing, the prepared coating has excellent self-healing properties, as shown in Figure 3 (a). When the coating is chemically damaged, only 10 hours of time will return to the original superhydrophobic properties at room temperature. The superhydrophobic coating prepared by this condition is still much faster than the superhydrophobic coating prepared by high temperature curing at 100 ° C for 2 hours, as shown in Fig. 3 (b), the common price key The superhydrophilic coating of the base is from about 24 hours at room temperature.

Embodiment 3

[0034] Different from Example 1 in:

[0035] The superhydrophobic coating is applied to the surface of the fiber fabric using a dipping manner, and a superhydrophilic fiber fabric having self-healing capacity is prepared by curing. Among them, the impregnation process is to complete the fiber fabric into the coating, impregnated for 1 minute.

[0036] After testing, the prepared superhydrophobic fiber fabric has excellent oil-water separation performance, and the superhydrophobic fiber fabric is subjected to oil pollution damage, and the oil separation ability is lowered; after cleaning of ethanol, at room temperature, it takes 4 hours to restore the original oil water. Separation ability, such as Figure 4 Indicated.

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Abstract

The invention discloses a preparation method of an anti-corrosion self-healing super-hydrophobic material based on a reversible hydrogen bond base, and a preparation method of a self-healing coating capable of rapidly repairing chemical damage at room temperature. Hydrolyzed octadecyltriethoxysilane self-healing agent was coupled with lignocellulose and ceramic nanoparticles rich in hydroxyl groups on the surface through hydrogen bonds, and epoxy resin and polyamide resin were used as adhesives to prepare superhydrophobic anti-corrosion coatings , the substrate coated on the surface of the material is further modified with octadecyltriethoxysilane to obtain a corrosion-resistant superhydrophobic coating with spontaneous healing function after chemical damage at room temperature; in addition, the porous material Immersed into the coating, the coating also has the function of oil-water separation after curing. The invention has low cost, and the prepared self-healing superhydrophobic coating can realize the function of spontaneous healing after chemical damage occurs on the surface of the material, and can recover quickly without additional assistance at room temperature. The coating has anti-corrosion performance and is widely used.

Description

Technical field [0001] The present invention belongs to the technical field of self-healing superhydrophobic material, and it is directed to a preparation method of anti-corrosion from healing superhydrophobic material based on an inverse hydrogen bond. Background technique [0002] With the discovery of self-healing materials, it is recognized that the superhydrophilic coating that can heal physics or chemical damage has many potential applications, such as being used in the fields of self-cleaning, anti-corrosion, anti-ice, oil and water separation. The self-healing superhydrophobic coating is mainly composed of a rough micro-nanostructure and a low surface energy self-healing agent. Among them, the micro-nanostructures can be prepared by various methods such as electrodeposition, corrosion, photolithography, template, sol-gel, and have a complex process and high for equipment; it can be used as a self-healing agent: Polyblium Low surface energy substances such as siloxane, oct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D177/00C09D101/02C09D7/61C09D7/63C09D5/08D06M15/05D06M15/55D06M15/59D06M11/00D06M13/513D06M11/79
CPCC09D163/00C09D7/61C09D7/63C09D5/08D06M15/05D06M15/55D06M15/59D06M11/00D06M11/79D06M13/513C08K2201/011D06M2200/12C08L2205/03C08L77/00C08L1/02C08K5/5419C08K3/36
Inventor 张滨白增国
Owner NORTHEASTERN UNIV LIAONING
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