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A kind of porous chitosan microsphere coated with corrosion inhibitor and its preparation and application

A technology of porous chitosan and corrosion inhibitor, which is applied in the preparation of microspheres, polyester coatings, microcapsule preparations, etc. It can solve the problems of weak anti-corrosion performance, poor waterproof performance, and low cross-linking degree, and achieve particle size Uniformity, improved coverage, and large specific surface area

Active Publication Date: 2019-06-11
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, water-based coatings have poor waterproof performance and weak anti-corrosion performance due to their hydrophilic molecules and low degree of crosslinking.

Method used

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  • A kind of porous chitosan microsphere coated with corrosion inhibitor and its preparation and application
  • A kind of porous chitosan microsphere coated with corrosion inhibitor and its preparation and application
  • A kind of porous chitosan microsphere coated with corrosion inhibitor and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. The preparation method of porous chitosan microspheres coated with corrosion inhibitors includes the preparation of porous chitosan microspheres and the coating of corrosion inhibitors:

[0030] 1) Preparation of porous chitosan microspheres: 2g chitosan, 2g acetic acid and 98g deionized water were mixed, then stirred for 24 hours; 2mL sorbitan oleate and 100mL liquid paraffin were mixed, then stirred for 6 Hour. Using a 5mL syringe, add 10mL chitosan acetic acid solution dropwise to 100mL liquid paraffin containing sorbitan oleate, and stir and emulsify for 20min. Then sodium hydroxide solution was added to adjust the pH value of the mixture to 9. Dissolve 0.33g of vanillin in 10.4g of acetone solution to form an acetone solution of vanillin. Then all the acetone solution of vanillin (13.2 mL) was added dropwise into the chitosan liquid paraffin wax mixture, and aged with stirring for 6 hours. Subsequently, the mixed solution was centrifuged, and the chitosan mic...

Embodiment 2

[0037] 1. The preparation method of porous chitosan microspheres coated with corrosion inhibitors includes the preparation of porous chitosan microspheres and the coating of corrosion inhibitors:

[0038] 1) Preparation of porous chitosan microspheres: Mix 2 g of chitosan, 2.5 g of acetic acid, and 97.5 g of deionized water, and then stir for 24 hours; mix 1 mL of sorbitan fatty acid ester with 100 mL of liquid paraffin, and then Stir for 6 hours. With a 5mL syringe, add 5mL chitosan acetic acid solution dropwise into 100mL liquid paraffin containing sorbitan fatty acid ester, stir and emulsify for 20min. Then sodium hydroxide solution was added to adjust the pH value of the mixture to 9. Dissolving 0.22g of vanillin in 12g of acetone solution is configured as an acetone solution of vanillin. Then all the acetone solution of vanillin (15.2 mL) was added dropwise into the chitosan liquid paraffin mixed solution, and aged with stirring for 5 hours. Subsequently, the mixed sol...

Embodiment 3

[0043] 1. The preparation method of porous chitosan microspheres coated with corrosion inhibitors includes the preparation of porous chitosan microspheres and the coating of corrosion inhibitors:

[0044]1) Preparation of porous chitosan microspheres: Mix 2 g of chitosan, 1.5 g of acetic acid, and 98.5 g of deionized water, and then stir for 24 hours; mix 1.5 mL of sodium lauryl sulfate with 100 mL of liquid paraffin, and then Stir for 6 hours. With a 5mL syringe, 7mL chitosan acetic acid solution was added dropwise to 100mL liquid paraffin containing sodium lauryl sulfate, and stirred and emulsified for 20min. Then sodium hydroxide solution was added to adjust the pH value of the mixture to 9. Dissolve 0.4g of vanillin in 13g of acetone solution to form an acetone solution of vanillin. Then all the acetone solution of vanillin (16.49 mL) was added dropwise into the chitosan liquid paraffin mixed solution, and aged with stirring for 7 hours. Subsequently, the mixed solution...

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Abstract

The invention relates to the technical field of porous material preparation, in particular to a porous chitosan microsphere of a coated corrosion inhibitor and a preparation and application thereof. The microsphere is that the corrosion inhibitor is coated by the porous chitosan microsphere, wherein the particle size of the porous chitosan microsphere is 20 to 30mu m, and the hole diameter is 3 to 4mu m. The preparation comprises the steps of soaking the porous chitosan microsphere with the particle size of 20 to 30mu m into corrosion inhibitor solution and coating the corrosion inhibitor in a vacuumizing mode. The prepared porous chitosan microsphere of the corrosion inhibitor disclosed by the invention achieves green and environmental friendliness, improves anticorrosion performance of a coating, can release slowly, prolongs serving time of waterborne coatings and solves the problem that waterborne coating has low anticorrosion performance and poor durability.

Description

technical field [0001] The invention relates to the technical field of preparation of porous materials, in particular to a porous chitosan microsphere coated with a corrosion inhibitor and its preparation and application. Background technique [0002] In recent years, due to the increasing degree of social industrialization, which has caused great harm to the environment, environmental protection issues have become more and more people's concerns. In the field of anti-corrosion coatings, solvent-based systems have been in a monopoly position due to their good anti-corrosion properties, high weather resistance, and excellent durability. However, the volatilization of a large number of volatile compounds into the air will cause serious damage to the environment and endanger human health. Therefore, water-based coatings have received extensive attention. However, the water-based coating has the problems of poor waterproof performance and weak anti-corrosion performance due to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/08C09D133/00C09D175/04C09D167/08B01J13/22B01J13/02
CPCB01J13/02B01J13/22C09D5/08C09D133/00C09D167/08C09D175/04
Inventor 李伟华刘晓杰王巍樊伟杰宋立英季涛
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI