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Photosensitive phytic acid doped polyaniline-based ultraviolet curing anticorrosive coating and preparation method thereof

A polyaniline-based, anti-corrosion coating technology, applied in the direction of anti-corrosion coatings, polyester coatings, epoxy resin coatings, etc., can solve the problems of protonic acid without additional functional properties, poor resin compatibility, etc., and achieve cross-linking density and Adhesion improvement and effect of increasing crosslink density

Active Publication Date: 2021-09-21
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, protonic acid mostly improves the problem of poor resin compatibility caused by long-range conjugated structure by doping polyaniline, but protonic acid itself no additional features

Method used

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  • Photosensitive phytic acid doped polyaniline-based ultraviolet curing anticorrosive coating and preparation method thereof
  • Photosensitive phytic acid doped polyaniline-based ultraviolet curing anticorrosive coating and preparation method thereof
  • Photosensitive phytic acid doped polyaniline-based ultraviolet curing anticorrosive coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] (1) Preparation of photosensitive phytic acid (PAGA-3): mix 0.025mol phytic acid with 40mL deionized water, then add 0.075mol GMA, add 0.1wt% terephthalic acid of phytic acid and glycidyl methacrylate Phenol as a polymerization inhibitor, phytic acid and glycidyl methacrylate in 0.5 wt% tetrabutylammonium bromide, after ultrasonic-assisted dispersion. The mechanical stirring speed was controlled at 150 rpm, and the reactant solution was reacted in an oil bath at 80°C for 0.5h to obtain a brown-yellow product, which was photosensitive phytic acid——PAGA-3.

[0069] (2) Preparation of photosensitive polyaniline: photosensitive phytic acid PAGA-3 is dispersed in deionized water to prepare a copolymer solution with a concentration of 0.2 g / mL, and photosensitive phytic acid and polyaniline (polyaniline particle size is 10 μm) are mixed in the solution. Add polyaniline at a mass ratio of 10:1, control the reaction time to 6.0 h under stirring, filter and wash to obtain photos...

Embodiment 2

[0073] (1) Preparation of photosensitive phytic acid (PAGA-5): mix 0.025mol phytic acid with 40mL deionized water, then add 0.125mol GMA, add phytic acid and 0.1wt% p-tert-butyl methacrylate of glycidyl methacrylate Hydroquinone as the polymerization inhibitor, phytic acid and glycidyl methacrylate in 1.0 wt% tetrabutylammonium bromide, after ultrasonic-assisted dispersion. The mechanical stirring speed was controlled at 150rpm, and the reactant solution was reacted in an oil bath at 90°C for 1.0h to obtain a brown-yellow product, which was photosensitive phytic acid——PAGA-5.

[0074] figure 1 Be the infrared spectrogram of PA, GMA and PAGA-5, there is the characteristic absorption peak (1164cm -1 ). For GMA, in addition to the characteristic absorption peak (910cm -1 ), you can also see the characteristic absorption peak of the unsaturated carbon-carbon double bond (1635cm -1 and 810cm -1 ) and the characteristic absorption peak attributed to the carbonyl group (1720cm ...

Embodiment 3

[0078] (1) Preparation of photosensitive phytic acid (PAGA-7): mix 0.025mol phytic acid with 40mL deionized water, then add 0.175mol GMA, add phytic acid and 0.5wt% of glycidyl methacrylate p-tert Butylcatechol as a polymerization inhibitor, phytic acid and glycidyl methacrylate with 1.0 wt% triphenylphosphine, after ultrasonic-assisted dispersion. The mechanical stirring speed was controlled at 150 rpm, and the reactant solution was reacted in an oil bath at 85°C for 2.0 hours to obtain a brownish-yellow product, which was photosensitive phytic acid——PAGA-7.

[0079] (2) Preparation of photosensitive polyaniline: photosensitive phytic acid PAGA-7 is dispersed in deionized water to prepare a copolymer solution with a concentration of 1.0 g / mL, and polyaniline is added to the solution at a mass ratio of photosensitive phytic acid to polyaniline of 25:1. Aniline, control the reaction time to 10h under stirring, filter and wash to obtain photosensitive polyaniline.

[0080] (3) ...

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Abstract

The invention discloses a photosensitive phytic acid doped polyaniline-based ultraviolet curing anticorrosive coating and a preparation method thereof, and belongs to the technical field of anticorrosive coatings. Photosensitive phytic acid is prepared through a polymerization reaction of phytic acid and glycidyl methacrylate, the photosensitive phytic acid is used as a doping agent, a double-bond structure capable of participating in a photopolymerization process is introduced while polyaniline doping modification is completed, photosensitive polyaniline is obtained, and the photosensitive polyaniline is applied to an ultraviolet curing coating layer. By doping the polyaniline with the photosensitive phytic acid, on one hand, the problem of poor compatibility of polyaniline and resin can be improved, and on the other hand, double-bond groups can participate in the prepolymer curing and crosslinking process in a photocuring system, so that the crosslinking density of the ultraviolet curing coating layer is improved. Meanwhile, phosphate groups in the photosensitive polyaniline can act with a base material, and the mechanical anchoring effect is improved through chemical bond generation, so that the defect of insufficient adhesive force caused by large instantaneous reaction shrinkage stress in the photopolymerization process is overcome.

Description

technical field [0001] The invention relates to a preparation method of a photosensitive phytic acid-doped polyaniline-based ultraviolet light curing anticorrosion coating, which belongs to the technical field of metal anticorrosion coatings. Background technique [0002] Affected by the erosion of external corrosive media, metals and their alloys tend to lose electrons and be oxidized into metal oxides of different valence states, resulting in a decline in the overall performance of the material and bringing varying degrees of impact on all aspects of national economic production and life. At present, the most convenient and effective method to slow down metal corrosion is still to apply a layer of coating on the metal substrate to isolate direct contact with water, oxygen, etc. Anti-corrosion coatings represented by conductive polyaniline can improve the long-term anti-corrosion conditions of shielding coatings (adding lamellar fillers) and avoid environmental pollution ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/06C09D163/10C09D7/65C09D5/08
CPCC09D167/06C09D7/65C09D5/08C08L63/10C08L79/02
Inventor 罗静刘仁潘威豪张立畅张嘉琪
Owner JIANGNAN UNIV
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