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Short fiber polyaniline and application thereof in water-based heavy anti-corrosion coating

A technology of polyaniline and short fibers, which is applied in anti-corrosion coatings, fiber chemical characteristics, coatings, etc., can solve the problems of difficult dispersion of composite particles, high CNT content, and increase the preparation cost of functional additive materials, and achieve excellent long-term anti-corrosion performance , excellent adhesion, and the effect of increasing electron transport performance

Pending Publication Date: 2022-04-12
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some defects in this part of work that need to be improved. For example, composite particles in the shape of nanotubes are not easy to disperse in coating resins, and the high content of CNT in nanocomposites will greatly increase the cost of preparing functional additive materials.

Method used

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  • Short fiber polyaniline and application thereof in water-based heavy anti-corrosion coating
  • Short fiber polyaniline and application thereof in water-based heavy anti-corrosion coating
  • Short fiber polyaniline and application thereof in water-based heavy anti-corrosion coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 0.93 g of aniline and a CNT containing 0.0093 g, adding the ultrasonic dispersion in a beaker, then adding a concentrated hydrochloric acid solution to 1, transferring a mixture into a three-neck flask, add 150 mL of deionized water, and use ice water bath The system temperature is at 0-5 ° C. 2.74 g of ammonium sulfate was sued with 10 ml of deionized water, and the drip funnel was added, and the reaction system was added to the reaction system in 30 minutes, and the reaction was added to the reaction for 16 h. After filtration of the mixed system, it was washed 3 times with ethanol and deionized water, and the short fiber morphology PANI (1% CNT) was dried.

Embodiment 2

[0030] The 0.93 g of aniline and a CNT containing 0.028 g were added to the beaker, and then the concentrated hydrochloric acid solution was adjusted to 1, and the mixture was transferred to a three-necked flask, and 150 ml of deionized water was added, and the ice water bath was added. The system temperature is at 0-5 ° C. 2.74 g of ammonium sulfate is dissolved with 10 ml of deionized water, and the drip funnel was added, and the reaction system was added to the reaction system in 30 minutes, and the reaction was added to the reaction for 24 h. After filtration of the mixed system, it was washed 3 times with ethanol and deionized water, and dried to obtain a short fiber morphology PANI (3% CNT).

Embodiment 3

[0032] It is weighed with 0.93 g of aniline and a CNT containing 0.047 g, and the ultrasonic dispersion of the beaker was added. Subsequently, the concentrated hydrochloric acid solution was adjusted to 1, and the mixture was transferred to the three-neck flask, and 150 ml of deionized water was added, and the water bath was added. The system temperature is at 0-5 ° C. 2.74 g of ammonium sulfate is dissolved with 10 ml of deionized water, and the drip funnel was added, and the reaction system was added to the reaction system in 30 minutes, and the reaction was added to the reaction for 24 h. After filtration of the mixed system, the mixture was washed 3 times with ethanol and deionized water, dried to obtain a short fiber morphology PANI (5% CNT).

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Abstract

The invention relates to short fiber polyaniline and an application thereof in a water-based heavy anti-corrosion coating. The short fiber polyaniline is prepared by the following steps: firstly, uniformly mixing CNT (Carbon Nanotube) which accounts for 1-5wt% of aniline and aniline, performing ultrasonic dispersion, adding water, and uniformly stirring to obtain a suspension; adding concentrated hydrochloric acid, mixing, and adjusting the pH value of the suspension to be below 2; dropwise adding an ammonium persulfate aqueous solution in an ice bath environment of 0-5 DEG C to initiate an aniline oxidation polymerization reaction; and after the reaction is finished, filtering, washing and drying to obtain the product. According to the invention, short-fiber-shaped polyaniline with controllable morphology is synthesized, a small amount of CNT not only has a morphology adjusting function, but also can increase the electron transport performance of polyaniline, and the oxidation-reduction activity of polyaniline is effectively expanded from acidity to neutrality; the short-fiber-shaped polyaniline not only can be easily and uniformly dispersed in the waterborne epoxy grafted acrylic coating, but also the formed coating has the characteristics of excellent toughness, adhesive force and long-acting corrosion resistance.

Description

Technical field [0001] The present invention relates to the field of anticorrosive coating, and more particularly to short fiber polyaniline and its application in aqueous heavy and anti-corrosion coatings. Background technique [0002] Traditional red-proof coating is due to poisonous weight metal pigments such as chromium, on the other hand, solvent-based coating causes serious threats due to high VOC emissions, therefore, green environmental protection anti-corrosion pigments and their coatings are increasing The more strong. Polyaniline is considered to be a large potential for environmentally friendly anti-corrosion pigments due to its simple synthesis, low cost and stability of raw materials. The "N" element in the polyaniline molecule can form a coordination key with the metal air orbit to improve the adhesion, and the polyaniline also plays a metal corrosion protection effect by metal passivation anode protection, cathode suppression and inhibitor sustained release. . How...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02C08K3/04D01F6/94D01F1/10C09D5/08C09D133/00
Inventor 朱爱萍马禹舜
Owner YANGZHOU UNIV
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