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Preparation method of phosphatized polyaniline-silicon dioxide graft modified graphene/waterborne epoxy-group-containing silicon resin composite coating

A technology of silica and graft modification, applied in the direction of coating, anti-corrosion coating, etc., can solve the problems of high production cost, unsatisfactory dispersion improvement effect, complicated preparation process, etc., and achieve the effect of increasing the spacing

Active Publication Date: 2021-11-05
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the mixing and non-bonding combination of graphene and polyaniline is not ideal for improving the dispersion of graphene and polyaniline, especially in water-based resins, which limits the synergistic effect of graphene and polyaniline.
Moreover, a series of modifications to graphene and polyaniline make the preparation process complicated; a large amount of organic solvents and chemicals are used, and the production cost is high, which restricts the wide application of composite materials

Method used

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  • Preparation method of phosphatized polyaniline-silicon dioxide graft modified graphene/waterborne epoxy-group-containing silicon resin composite coating
  • Preparation method of phosphatized polyaniline-silicon dioxide graft modified graphene/waterborne epoxy-group-containing silicon resin composite coating
  • Preparation method of phosphatized polyaniline-silicon dioxide graft modified graphene/waterborne epoxy-group-containing silicon resin composite coating

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specific Embodiment approach 1

[0070] Specific embodiment one: the preparation method of phosphating polyaniline-silicon dioxide graft modified graphene / water-based epoxy-containing silicone resin composite coating in this embodiment is carried out according to the following steps:

[0071] 1. Preparation of graphene oxide-silica composites

[0072] Add graphene oxide into deionized water, ultrasonically disperse for 3 to 4 hours to obtain a graphene oxide dispersion, then add ammonia water, and magnetically stir for 15 minutes to obtain an alkaline graphene oxide dispersion, then add absolute ethanol, deionized water and orthosilicon The mixed solution of ethyl acetate was stirred and reacted at 60° C. for 6 h, filtered and washed until the solid product became neutral, and a graphene oxide-silicon dioxide composite material was obtained;

[0073] The concentration of the graphene oxide dispersion is 1-1.5 mg / mL;

[0074] The ratio of the volume of tetraethyl orthosilicate to the mass of graphene oxide is...

specific Embodiment approach 2

[0100] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the metal in step 4 is steel.

specific Embodiment approach 3

[0101] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the alloy in step 4 is aluminum alloy or magnesium alloy.

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Abstract

The invention discloses a preparation method of a phosphatized polyaniline-silicon dioxide graft modified graphene / waterborne epoxy-group-containing silicon resin composite coating, relates to a preparation method of a silicon resin composite anticorrosive coating, and aims to solve the problems of poor dispersibility of modified graphene and polyaniline in polymer resin, complex process and environmental pollution during preparation of the existing composite coating. The method comprises the following steps: anchoring silicon dioxide on the surface of graphene oxide through a covalent bond to prepare a graphene oxide-silicon dioxide composite material, preparing a phosphatized polyaniline-silicon dioxide grafted modified graphene composite material by adopting phytic acid as a modifier, and compounding and curing the phosphatized polyaniline-silicon dioxide grafted modified graphene composite material with epoxy group-containing water-based silicon resin. According to the invention, the dispersibility of graphene and polyaniline is improved, the hydrophobicity of the composite coating is improved, the synergistic effect of graphene and polyaniline is more obvious, and the corrosion resistance of the water-based coating is improved. The preparation method is suitable for preparing the silicon resin composite anticorrosive coating.

Description

technical field [0001] The invention relates to a preparation method of a silicone resin composite anticorrosion coating. Background technique [0002] Metal materials are an indispensable part of people's life and social development, and their role is irreplaceable. However, corrosion of metals is also very common. The annual economic losses caused by metal corrosion are incalculable. Therefore, the protection of metals is particularly important, and the effective protection of metals has always been the goal pursued by people. At present, there are many methods for metal protection. Among them, the most direct and effective way is to apply anti-corrosion coating materials on the surface of the substrate, which can prolong the service life of the metal to a large extent. [0003] Traditionally, polymers are often used in anti-corrosion coatings to create a barrier between the metal surface and the surrounding environment, preventing corrosion ions from penetrating throu...

Claims

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Application Information

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IPC IPC(8): C09D183/06C09D5/08C09D7/62C09D7/65
CPCC09D183/06C09D5/08C09D7/62C09D7/65C08L79/02C08K9/04C08K3/042C08K3/36C08K9/08C08K9/02
Inventor 高晓辉李玉峰赵甜甜赵阳
Owner QIQIHAR UNIVERSITY
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