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Method for preparing composite graphene/silane film on surface of metal

A technology of metal surface and composite thin film, which is applied in the direction of metal material coating process, liquid chemical plating, coating, etc., can solve the problems of weak bonding strength, achieve high bonding strength, and improve the effect of corrosion resistance

Active Publication Date: 2014-03-12
扬中方略科技信息有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcoming of weak bonding strength between graphene film and metal, introduce silane coupling agent containing two kinds of different chemical functional groups as transition film layer, produce a kind of composite film, composite film is made of graphene and silane coupling agent composition (such as figure 1 As shown), the indirect chemical bond between metal and graphene is achieved by means of silane coupling agent, thereby improving the bonding strength between graphene and metal, and the composite film has a long service life and effectively improves the metal anti-corrosion performance

Method used

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  • Method for preparing composite graphene/silane film on surface of metal
  • Method for preparing composite graphene/silane film on surface of metal
  • Method for preparing composite graphene/silane film on surface of metal

Examples

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Effect test

Embodiment example 1

[0033] 1 Preparation of graphene oxide dispersion

[0034] 1) Pre-oxidation

[0035] Take 3g artificial graphite and 10ml concentrated H 2 SO 4 , 1gP 2 o 5 , 1gK 2 S 2 o 8 The mixture was placed in a three-necked flask, heated to 80°C and maintained for 2h, until the solution in the three-necked flask was blue-black, then stop heating, and the reactant was naturally cooled to room temperature, and allowed to stand for 6h; the reactant was filtered, and continuously rinsed with distilled water, The reactant was filtered until the filtrate was neutral, and finally the obtained solid was air-dried at room temperature for 24 h.

[0036] 2) Oxidation and dispersion by Hummers method

[0037] Take 1gNaNO 3 Place in a three-necked flask, add 50ml of concentrated H 2 SO 4 , and keep stirring to make NaNO 3 Fully dissolved in concentrated H 2 SO 4 In the above solution, take the dried pre-oxidized product and add it to the above solution, place the three-necked fl...

Embodiment example 2

[0043] 1 Preparation of graphene oxide dispersion

[0044] The preparation method of graphene oxide is the same as that of case 1. Dissolve 0.001g of graphene oxide in 1ml of N-methylpyrrolidone (density of 1.028 g / mL at 25°C) solution (the mass concentration of graphene oxide is 0.097%), and after ultrasonication for 2 hours A uniform dispersion is formed and sealed for storage until use.

[0045] 2 Preparation of γ-aminopropyltrimethoxysilane grafted graphene oxide

[0046] Take 15ml of γ-aminopropyltrimethoxysilane (APTMS structure as Figure 6 Shown) Slowly drop into the dispersion under stirring, stir and react in a water bath at 80°C for 24h, through the NH of APTMS molecules 2 The group reacted with the COOH group on the surface of graphene oxide to complete grafting, and the obtained paste was ultrasonically dispersed for 2 hours to obtain a graphene oxide solution grafted with a silane coupling agent; the solution was placed in a water bath at 90°C, and slowly ...

Embodiment example 3

[0051] 1 Preparation of graphene oxide dispersion

[0052] The preparation method of graphene oxide is the same as that of case 1. Dissolve 0.001g of graphene oxide in 1ml of N-methylpyrrolidone (density of 1.100 g / mL at 20°C) solution (the mass concentration of graphene oxide is 0.091%), and after ultrasonication for 2 hours A uniform dispersion is formed and sealed for storage until use.

[0053] Preparation of 2γ-mercaptopropyltrimethoxysilane grafted graphene oxide

[0054] Take 20ml of γ-mercaptopropyltrimethoxysilane (MPTS structure as Figure 7 Shown) was slowly dropped into the dispersion liquid under stirring, stirred and reacted in a water bath at 90°C for 24 hours, the grafting was completed by the reaction of the SH group of the MPTS molecule with the COOH group on the surface of graphene oxide, and the obtained paste was ultrasonically dispersed After 2h, the graphene oxide solution grafted with silane coupling agent was obtained; the solution was placed in a wa...

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Abstract

The invention relates to metal surface protection, and in particular relates to a method for preparing a composite graphene / silane film on the surface of metal. The method overcomes the defect that the binding strength of a graphene film and the metal is weak; a silane coupling agent with two different chemical functional groups is introduced as a transition film layer to prepare a composite film, and the composite film is prepared from graphene and the silane coupling agent. The chemical bond connection between the metal and graphene is achieved through the silane coupling agent, and the binding strength of graphene and the metal is improved; the prepared composite film is long in service life, and the anti-corrosion property of the metal is effectively improved.

Description

technical field [0001] The invention relates to metal surface protection, in particular to a method for preparing a graphene / silane anti-corrosion composite film on a metal surface through a molecular self-assembly method. Background technique [0002] Metal anti-corrosion has always been the research focus of metal protection. The methods often used in the industry are to carry out nitriding treatment, phosphating treatment on the metal surface, or use organosilane as the main raw material to treat the surface of the metal material, and then spray paint, etc. These The method can improve the corrosion resistance of metal materials, but the nitriding treatment consumes a lot of energy, and the phosphating treatment is easy to produce heavy metal ions, causing serious environmental pollution. Treatment with organosilane is a relatively environmentally friendly method that can avoid the deficiencies of the first two methods, but the corrosion resistance needs to be further imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/16C23C22/68
Inventor 程广贵石阳阳丁建宁张忠强凌智勇
Owner 扬中方略科技信息有限公司
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