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Method for preparing self-healing coating based on environment-friendly nanometer container

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

Inactive Publication Date: 2016-06-01
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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  • Method for preparing self-healing coating based on environment-friendly nanometer container

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 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

[0033] 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 is a metal anticorrosive coating, which involves a preparation method based on an environmentally friendly nano -container. Background technique [0002] Organic anticorrosive coatings will suffer wear, wear, and abrasion in the process of long -term use. It is prone to bubbles, pinhole and micro -cracks, which will expose the small area of metal in the corrosive medium, causing local corrosion, leading to coating coatingFailure in advance.In recent years, people's research on intelligent self -healing anti -corrosion coating has increased year by year. When such coatings are ruptured, functional microspheres or nano containers scattered in the coating can release healing or corrosion.The protective film prevents or slows the metal corrosion process.Self -healing coating has become a novel and effective way to improve the effects of anti -corrosion. [0003] The research on self -healing anticorrosive coating can be roughly divided into two ca...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/08C09D7/12
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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