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A preparation method of self-healing coating based on environment-friendly nanocontainer

An environment-friendly nano-container technology, applied in coatings, epoxy resin coatings, anti-corrosion coatings, etc., can solve the problems of cumbersome preparation steps and toxic substances, and achieve the effect of simple preparation method, low cost and good protective performance

Inactive Publication Date: 2018-06-01
QINGDAO AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation steps of traditional nanocontainers are too cumbersome, and most of the small molecule corrosion inhibitors used are toxic substances

Method used

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  • A preparation method of self-healing coating based on environment-friendly nanocontainer
  • A preparation method of self-healing coating based on environment-friendly nanocontainer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take 5 parts nano-SiO 2 Mix with 100 parts of deionized water and magnetically stir for 12h to make SiO 2 Sol-gel solution, the prepared SiO 2 The sol-gel solution was mixed with 5 parts of 5 mg / mL chitosan (CS) solution, magnetically stirred for 20 minutes, ultrasonically dispersed for 20 minutes, and centrifuged for 20 minutes. After centrifugation, the upper layer solution was poured out, and the lower layer of particles was washed with deionized water to obtain CS-coated SiO 2 Particles: SiO 2 / CS. The prepared SiO 2 / CS mixed with 5 parts of 2 mg / mL polyaspartic acid (PASP) corrosion inhibitor aqueous solution, magnetically stirred for 20 minutes, ultrasonically dispersed for 20 minutes, and centrifuged for 20 minutes. , to obtain SiO coated with PASP and CS layer by layer 2 Particles: SiO 2 / CS / PASP. Repeat the above steps to obtain nanocontainer SiO 2 / CS / PASP / CS / PASP. Put the final granules into an oven and dry at 50-60°C for 24 hours for future use. ...

Embodiment 2

[0032] Take 10 parts nano-SiO 2 Mix with 100 parts of deionized water and magnetically stir for 12h to make SiO 2 Sol-gel solution, the prepared SiO 2 The sol-gel solution was mixed with 10 parts of 5 mg / mL chitosan (CS) solution, magnetically stirred for 20 minutes, ultrasonically dispersed for 20 minutes, and centrifuged for 20 minutes. After centrifugation, the upper layer solution was poured out, and the lower layer of particles was washed with deionized water to obtain CS-coated SiO 2 Particles: SiO 2 / CS. The prepared SiO 2 / CS mixed with 10 parts of 5 mg / mL polyaspartic acid (PASP) corrosion inhibitor aqueous solution, magnetically stirred for 20 minutes, ultrasonically dispersed for 20 minutes, and centrifuged for 20 minutes. After centrifugation, pour out the upper layer solution and wash the lower layer of particles with deionized water , to obtain SiO coated with PASP and CS layer by layer 2 Particles: SiO 2 / CS / PASP. Repeat the above steps to obtain nanocon...

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Abstract

The invention design a self-healing coating based on an environment-friendly nanometer container, and belongs to the field of metal corrosion-resistant coatings. A method for preparing the self-healing coating is characterized by comprising the following steps: alternately depositing chitosan and polyaspartic acid on the surface of a nanosilicon dioxide material by adopting a layer-by-layer self-assembly method, preparing the layer-by-layer self-assembled nanosilicon dioxide material into the environment-friendly nanometer container through centrifugation, deionized water washing and drying, mixing the environment-friendly nanometer container and a diluent according to a certain proportion, and conducting ultrasonic dispersion to obtain a component I; adding epoxy resin, a dispersing agent and a flatting agent into the component I, uniformly mixing, and adding a curing agent so as to obtain the uniformly dispersed self-healing coating. Raw materials used by the self-healing coating prepared by adopting the method is environment-friendly, cheap and easy to obtain; the capacity of a corrosion inhibitor in the nanometer container is large; in the micro broken area of the coating, the nanometer container loaded with the corrosion inhibitor can release corrosion inhibitor molecules to be adsorbed on the surface of metal to form a protecting film, so as to play a certain self-healing role.

Description

technical field [0001] The invention belongs to metal anticorrosion coatings, in particular to a preparation method of a self-healing coating based on an environment-friendly nano container. Background technique [0002] During long-term use, organic anti-corrosion coatings will suffer from wear, wear and abrasion, and are prone to bubbling, pinholes and micro-cracks, which will expose a small area of ​​metal to corrosive media, causing localized corrosion, and causing the coating to expire prematurely. In recent years, research on intelligent self-healing anti-corrosion coatings has been increasing year by year. When this type of coating breaks, functional microspheres or nano-containers dispersed in the coating can release healing agents or corrosion inhibitors, forming A protective film that prevents or slows down the corrosion process of metals. Self-healing coatings become a novel and effective method to improve the anti-corrosion effect of coatings. [0003] People'...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/61C09D7/65
CPCC08K2201/011C08L2205/03C09D5/08C09D7/62C09D163/00C08L79/08C08L5/08C08K3/36
Inventor 钱备刘成宝宋祖伟
Owner QINGDAO AGRI UNIV
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