Preparation method of polyaniline modified graphene oxide/hydroxylated boron nitride composite epoxy coating

A kind of oxide stone, polyaniline technology, applied in epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve the problems of poor solubility and processability, and achieve improved corrosion resistance, excellent anti-corrosion performance, and good anti-corrosion performance. Effect

Active Publication Date: 2021-04-30
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, their solubility and processability in common hydrophilic and hydrophobic solvents are poor, so how to improve the solubility of BN in solvents and the compatibility with other materials is particularly important

Method used

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  • Preparation method of polyaniline modified graphene oxide/hydroxylated boron nitride composite epoxy coating
  • Preparation method of polyaniline modified graphene oxide/hydroxylated boron nitride composite epoxy coating
  • Preparation method of polyaniline modified graphene oxide/hydroxylated boron nitride composite epoxy coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) 100 g of thionyl chloride and 2.5 g of graphene oxide were weighed and placed in a three-necked flask, and the mixed solution was ultrasonically treated to prepare a uniform dispersion. After refluxing for 24 hours under the protection of nitrogen, add an appropriate amount of toluene and distill under reduced pressure for 3 times to obtain graphene acid chloride. Dissolve the obtained solid acyl chloride graphene in an appropriate amount of toluene and disperse evenly, add 4g of p-phenylenediamine, reflux for 12 hours under nitrogen protection, add an appropriate amount of organic solvent and distill under reduced pressure for 3 times, centrifuge and freeze-dry to obtain amino-modified graphite oxide ene (rGO-NH 2 )powder.

[0026] (2) Weigh 2.5g rGO-NH 2 The powder and 2g of aniline were added to the hydrochloric acid solution, the ultrasonic power was set to 700W, and the ultrasonic time was 60min, and the solution was ultrasonically dispersed to a uniform disp...

Embodiment 2

[0033] (1) 120 g of thionyl chloride and 1.25 g of graphene oxide were weighed and placed in a three-necked flask, and the mixed solution was ultrasonically treated to prepare a uniform dispersion. After refluxing for 24 hours under the protection of nitrogen, add an appropriate amount of toluene and distill under reduced pressure for 3 times to obtain graphene acid chloride. Dissolve the obtained solid acyl chloride graphene in an appropriate amount of toluene and disperse evenly, add 5g of p-phenylenediamine, reflux for 12 hours under the protection of nitrogen, add an appropriate amount of organic solvent and distill under reduced pressure for 3 times, centrifuge and freeze-dry to obtain amino-modified graphite oxide ene (rGO-NH 2 )powder.

[0034] (2) Weigh 1.25g rGO-NH 2 The powder and 1g of aniline were added to the hydrochloric acid solution, the ultrasonic power was set to 800W, and the ultrasonic time was 50min, and the solution was ultrasonically dispersed to a uni...

Embodiment 3

[0041] (1) 80 g of thionyl chloride and 0.5 g of graphene oxide were weighed and placed in a three-necked flask, and the mixed solution was ultrasonically treated to prepare a uniform dispersion. After refluxing for 24 hours under the protection of nitrogen, add an appropriate amount of toluene and distill under reduced pressure for 3 times to obtain graphene acid chloride. Dissolve the obtained solid acyl chloride graphene in an appropriate amount of toluene and disperse evenly, add 2g of p-phenylenediamine, reflux for 12 hours under nitrogen protection, add an appropriate amount of organic solvent and distill under reduced pressure for 3 times, centrifuge and freeze-dry to obtain amino-modified graphite oxide ene (rGO-NH 2 )powder.

[0042] (2) Weigh 0.5rGO-NH 2 The powder and 2.5g of aniline were added to the hydrochloric acid solution, the ultrasonic power was set to 600W, and the ultrasonic time was 30min, and the solution was ultrasonically dispersed until it was unifo...

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Abstract

The invention discloses a preparation method of a polyaniline modified graphene oxide/hydroxylated boron nitride composite epoxy coating, which comprises the following steps of carrying out amino modification on graphene oxide by phenylenediamine to obtain amino modified graphene oxide, carrying out in-situ polymerization on the amino modified graphene oxide and an aniline hydrochloric acid solution to obtain PrGO, combining the PrGO with hydroxylated boron nitride, and carrying out mutual intercalation on the PrGO and BN(OH)x to obtain a BN(OH)x-PrGO mixture, and finally, combining the BN(OH)x-PrGO mixture with epoxy resin through a cardanol modified curing agent to prepare the BN(OH)x-PrGO composite epoxy coating. According to the preparation method, boron nitride and graphene oxide are respectively modified, so that the dispersity and material compatibility of PrGO and BN(OH)x in an organic solvent are effectively improved, and the corrosion resistance, glossiness and adhesive force of the epoxy composite coating are greatly improved due to the high shielding and synergistic effects of the two modified materials.

Description

technical field [0001] The invention belongs to a preparation method of a composite epoxy coating, in particular to a preparation method of a polyaniline modified graphene oxide / hydroxylated boron nitride composite epoxy coating. Background technique [0002] Epoxy resin molecules contain two or more epoxy groups, which have excellent mechanical properties, adhesion and acid and alkali resistance. In the field of metal corrosion, epoxy coatings are widely used for their excellent corrosion resistance. Since epoxy resin has poor flexibility and other properties when used alone, it cannot meet the needs of coating performance. Many researchers are also improving its anti-corrosion performance by doping or modification. As a new functional polymer material, polyaniline has good physical and chemical stability, and it is also valued as a good anti-corrosion material, and its cost is low, so it has great application value. Polyaniline is mainly used to isolate corrosive substan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/62C09D7/65
CPCC09D163/00C09D5/08C09D7/62C09D7/65C08K2003/385C08L79/02C08K9/04C08K3/042C08K3/38
Inventor 殷允杰叶挺王潮霞陈坤林
Owner JIANGNAN UNIV
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