Graphene micro-sheet used for waterborne anticorrosive coating and preparation method thereof

A graphene micro-sheet and anti-corrosion coating technology, applied in the field of graphene, can solve problems such as poor dispersion compatibility, achieve the effects of improving compatibility, avoiding the decline of anti-corrosion performance, and overcoming the lamellar structure

Inactive Publication Date: 2017-04-19
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome technical problems such as the dispersibility of graphene in water-based anticorrosion coatings and poor compatibility with other materials in the prior art, and provide a kind of graphene microchip for water-based anticorrosion coatings and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Dissolving sodium dodecyl sulfonate into pure water, the concentration of the sodium dodecyl sulfonate aqueous solution is 0.5mg / L;

[0030] (2) Add graphite and the above-mentioned sodium dodecylsulfonate solution to the colloid mill, run the colloid mill, and grind and peel the added graphite. The weight ratio of graphite to surfactant is 1:10, and the peeling time is Be 5 hours, in this stripping process, the graphene that makes is carried out surface modification simultaneously, to strengthen its hydrophilicity;

[0031] (3) After fully stirring the prepared graphene suspension, add an energy-concentrating ultrasonic probe, the ultrasonic frequency is 80kHz, adjust the dispersion temperature to 0°C through the cooling system, and obtain the modified graphene dispersion after 1h of dispersion time .

[0032] (4) Dissolving the shell material in water, the concentration of the shell material aqueous solution is 1%, and then adding the shell material aqueous solut...

Embodiment 2

[0034] (1) Sodium dodecylbenzenesulfonate was dissolved in pure water, and the concentration of the sodium dodecylbenzenesulfonate aqueous solution was 2 mg / L;

[0035] (2) Add graphite and the above-mentioned sodium dodecylbenzenesulfonate solution into the colloid mill, run the colloid mill, grind and peel off the added graphite, the weight ratio of graphite to surfactant is 1:0.2, and peel off The time is 3 hours, during this stripping process, the graphene that makes is carried out surface modification simultaneously, to enhance its hydrophilicity;

[0036](3) After fully stirring the prepared graphene suspension, add an energy-concentrating ultrasonic probe with an ultrasonic frequency of 20kHz, adjust the dispersion temperature to 20°C through the cooling system, and obtain a modified graphene dispersion after a dispersion time of 5 hours .

[0037] (4) The shell material is dissolved in water, the concentration of the shell material aqueous solution is 5%, and then the...

Embodiment 3

[0039] (1) Sodium dodecylbenzenesulfonate was dissolved in pure water, and the concentration of the sodium dodecylbenzenesulfonate aqueous solution was 5 mg / L;

[0040] (2) Add graphite and the above-mentioned surfactant solution into the colloid mill, run the colloid mill, grind and peel off the added graphite, the weight ratio of graphite to surfactant is 1:5, and the peeling time is 5 hours, During this exfoliation process, the surface modification of the prepared graphene is carried out at the same time to enhance its hydrophilicity;

[0041] (3) After fully stirring the prepared graphene suspension, add an energy-concentrating ultrasonic probe with an ultrasonic frequency of 60kHz, adjust the dispersion temperature to 10°C through the cooling system, and obtain a modified graphene dispersion after a dispersion time of 5 hours .

[0042] (4) The shell material is dissolved in water, the concentration of the shell material aqueous solution is 3%, and then the shell materia...

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Abstract

The invention discloses a graphene micro-sheet used for a waterborne anticorrosive coating and a preparation method thereof. According to the invention, graphite is stripped to prepare the graphene micro-sheet by utilizing mechanical shearing force, so the lamellar structure of graphene is protected, and the corrosion resistance of graphene lamella is avoided from decrease due to damage of the graphene lamella; meanwhile, in the process of preparing the graphene micro-sheet, a surfactant is utilized for surface modification of the prepared graphene micro-sheet, so the water solubility of the graphene micro-sheet is increased; the modified graphene is coated with a shell material, so a modified graphene microcapsule with a shell is formed, and the modified graphene is prevented from agglomeration during storage and formulation; and the shell is a macromoleclar polymer, so the compatibility of graphene with materials in the anticorrosive coating can be improved.

Description

technical field [0001] The invention relates to the technical field of graphene, in particular to a graphene microchip used for water-based anticorrosion coatings and a preparation method thereof. Background technique [0002] Graphene is a new type of two-dimensional material with a single-layer sheet structure composed of carbon atoms. It is a flat film of a hexagonal honeycomb lattice composed of carbon atoms with sp2 hybrid orbitals. This material has the characteristics of "thin and strong", excellent thermal conductor and electron mobility. Due to its unique chemical structure and geometric structure, it has broad application prospects in the fields of nanoelectronic devices, energy storage materials, catalysis, sensors, drug carriers, and functional coatings. [0003] Graphene has multiple functions of physical anti-corrosion and electrochemical anti-corrosion in improving the anti-corrosion of coatings. The conjugated structure of graphene sheets is superimposed la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/08
CPCC09D5/08
Inventor 陈庆曾军堂陈兵王镭迪
Owner CHENDU NEW KELI CHEM SCI CO LTD
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