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A kind of preparation method of secondary doping poss modified polyaniline anticorrosion coating

A secondary doping and anti-corrosion coating technology, which is applied in the direction of anti-corrosion coatings, coatings, epoxy resin coatings, etc., can solve the problems of weak inorganic acid chelation, weak chelation ability, and corrosion of metal substrates. Improve the service life, enhance the strength, and the effect of excellent mechanical properties

Active Publication Date: 2022-04-01
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For PANI doped with inorganic acids, on the one hand, it will lead to defects, such as (1) doped acidic anions (such as Cl - and SO4 2- ) will cause corrosion of metal substrates; (2) the chelation of inorganic acids is weak
Although organic acid-doped PANI has good compatibility with resins, their chelating ability is also weak

Method used

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  • A kind of preparation method of secondary doping poss modified polyaniline anticorrosion coating
  • A kind of preparation method of secondary doping poss modified polyaniline anticorrosion coating
  • A kind of preparation method of secondary doping poss modified polyaniline anticorrosion coating

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation method of secondary doped POSS modified polyaniline anti-corrosion coating, in accordance with the following steps:

[0032] (1) Preparation of octaminated cage sedation of semiciloxane (POSS-NH 2At room temperature, deionized water (22.5 mL), propanol (10 mL), acetonitrile (2.5 mL), and tetraethyl hydroxide (1.5 ml) were mixed into 250 ml of three flasks; after stirring, The gamma-aminopropyltriethoxysilane (KH-550) (550) (550) (550) (550) (550) (550) (550) (550) (55 g) was slowly added dropwise, and the reaction was stirred at 60 ° C. After the reaction was completed, it was cooled to room temperature. The resulting product was precipitated in a low temperature preserved tetrahydrofuran (100 mL); centrifuged the product, dried at 35 ° C for 24 h, to obtain an octaminated cage sediment (Poss-NH) 2 The product is characterized by nuclear magnetic hydrogen spectrum.

[0033] (2) Aqueous ammonium persulfate (APS, 4.564 g) was dispersed in aqueous hydrochloric acid...

Embodiment 2

[0038] The concentration of ammonia aqueous ammonia solution in step (3) is 5%, and dried in vacuo 24 h.

[0039] In step (5), 0.03 g of coating material, 1.4 ml of toluene, 0.6 ml of anhydrous ethanol.

[0040] Others are the same as specific implementation cases.

Embodiment 3

[0042] The concentration of ammonia aqueous ammonia solution in step (3) is 5%, and dried in vacuo 24 h.

[0043] Step (5) The coating material was 0.06 g, 1.4 ml of toluene, 0.6 ml of anhydrous ethanol.

[0044] Others are the same as specific implementation cases.

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Abstract

The invention discloses a method for preparing a secondary doped POSS modified polyaniline anticorrosion coating, which belongs to the field of polymer composite materials. Firstly, octaamino cage silsesquioxane (POSS) is prepared by using silane coupling agent KH-550 ‑NH 2 ), then use POSS‑NH 2 Modified polyaniline prepared polyaniline / octaamino cage silsesquioxane composites (PANI / POSS‑NH 2 ); The composite material is dedoped; Utilize 2-hydroxyphosphonocarboxylic acid (HPAA) to secondary doping of the composite material after dedoping; The composite material after the secondary doping is dispersed in toluene and ethanol A mixed solution is mixed with an epoxy resin and a curing agent in a certain proportion, and after curing, a secondary doped POSS modified polyaniline anticorrosion coating is obtained. The coating prepared by the invention has excellent anti-corrosion performance, simple coating preparation process, energy saving and environmental protection, efficient and safe reaction, and is suitable for industrial production.

Description

Technical field [0001] The present invention relates to the field of polymer composite materials, and more particularly to a method for preparing a secondary doped POSS modified polyaniline antiseptic coating. Background technique [0002] In numerous application materials, metal materials are widely used in various fields of people's lives and economic construction due to their excellent physical chemical properties and machining properties. However, most metal materials are easily chemically, electrochemically or physical effects with the surrounding environment therefor, thereby deteriorating metal materials, referred to as metal corrosion. When the metal material is corroded, the mechanical properties such as metal material can be significantly reduced, and the life of the mechanical equipment, which will even bring the buildings collapsed, toxic substance leaks, gas storage tank explosions and other disasters. ACCIDENT. Metal corrosion problems all over the economic construc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/65C08G77/26C08G73/02
CPCC09D163/00C09D5/08C09D7/65C08G77/045C08G77/26C08G73/0266C08L2205/03C08L83/08C08L79/02
Inventor 欧宝立段俊汪雨微彭彩茹赵欣欣
Owner HUNAN UNIV OF SCI & TECH