CN104711654B - Graphene oxide/electrophoretic paint composite coating and its electrophoretic deposition preparation method - Google Patents
Graphene oxide/electrophoretic paint composite coating and its electrophoretic deposition preparation method Download PDFInfo
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- CN104711654B CN104711654B CN201510119926.7A CN201510119926A CN104711654B CN 104711654 B CN104711654 B CN 104711654B CN 201510119926 A CN201510119926 A CN 201510119926A CN 104711654 B CN104711654 B CN 104711654B
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- graphene oxide
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Abstract
The present invention provides a kind of graphene oxide/electrophoretic paint composite coating and its electrophoretic deposition preparation method, and the coating is the uniform mixed coating that a kind of graphene oxide is constituted with electrophoretic paint, i.e., the composite coating prepared using mixing depositing process.Methods described includes the preparation of graphene oxide dispersion, the preparation of electrophoresis mixed liquor and the preparation of electrophoresis electrode used therein.Ready electrode is inserted in the graphene oxide/electrophoretic paint electrophoresis mixed liquor prepared, the composite deposite of graphene oxide/electrophoretic paint is obtained using the method for electrophoresis.The composite deposite can not only improve antiseptic property compared with traditional single electrophoretic paint coating, while improving the hardness of the mechanical property, especially paint film of paint film, it is to avoid paint film produces cut in use, improve the outward appearance and service life of paint film coating.
Description
Technical field
The present invention relates to graphene/electrophoretic paint laminated film and preparation method thereof, applied to automobile, automatic vehicle, machine
The painting anticorrosion of the handwares such as electricity, household electrical appliances, belongs to anti-corrosion material coat preparing technology field.
Background technology
Graphene is the preferable two dimensional crystal by Covalent bonding together by carbon atom, with excellent mechanics, calorifics
And electric property, have latent in terms of energy storage material, polymer composites, liquid crystal display device and biochemical sensor
In application.Meanwhile, the stable sp of graphene2Hybrid structure can prevent the progress of scattering and permeating, and with thermally-stabilised well
Property and chemical stability, the whether equal energy under the high temperature conditions or in corrosion or the gas of oxidisability, liquid environment
Keep stable.
Constantly emerge with the defect of Typical spray, electrophoretic coating starts to become more popular.Electrophoretic coating is used as one
The new low stain of class, the coating for saving the energy, resource-saving, acting as protection and anticorrosive property, with smooth coating, water resistance and resistance to
Chemically good the features such as, the mechanization and automation of application industry are easily realized, it is suitable complex-shaped, there are edge corner angle, hole
Workpiece coating, is widely used in the application of automobile, automatic vehicle, electromechanics, household electrical appliances, handware etc., and utilization rate can reach percent
65 or so.
The content of the invention
In view of the shortcomings of the prior art, the purpose of the present invention is to propose to a kind of compound painting of the enhanced electrophoretic paint of graphene oxide
Layer and preparation method thereof.This composite coating not only has preferable Corrosion Protection, while having higher mechanical property.
To realize above-mentioned purpose, the present invention uses following technical scheme：
The present invention provides a kind of graphene oxide/electrophoretic paint composite coating, is that a kind of graphene oxide is constituted with electrophoretic paint
Uniform mixed coating, i.e., using mixing depositing process prepare composite coating.
Preferably, the graphene oxide is evenly distributed in electrophoretic paint coating, and graphene oxide is in composite coating
Weight content is more than 0 and less than or equal to 30%.
The present invention provides a kind of electrophoretic deposition preparation method of above-mentioned graphene oxide/electrophoretic paint composite coating, and its is specific
Preparation process is as follows：
Step one, using sheet metal as negative electrode, titanium sheet is respectively perpendicular electrophoretic paint/oxygen that insertion is prepared as anode
In graphite alkene mixing plating solution；
Step 2, electrophoretic deposition is carried out to above-mentioned electrophoretic paint/graphene oxide mixing plating solution；
Step 3, will deposit the anode that has electrophoretic paint/graphene oxide film and takes out, and after rinsing well, carry out hot place
Reason, is then cooled to room temperature, so as to obtain graphene oxide/electrophoretic paint composite deposite.
As a preferred embodiment, the electrophoretic paint/graphene oxide mixing plating solution, configuration step is as follows：
The preparation of step 1. graphene oxide dispersion
Graphene oxide solution prepares that (preparation can be used by the way that graphite powder to be carried out to the method for Strong oxdiative at low temperature
Method described in ZL201010264796.3, it would however also be possible to employ other method), finally giving dispersed, concentration is
0.1mg/L~1g/L yellowish-brown graphene oxide solution.
The preparation of step 2. electrophoresis mixed liquor
By electrophoretic paint black wash, emulsion, graphene oxide solution and deionized water add a container in, graphene oxide it is dense
Spend for 0.5-50mg/L, at room temperature with magnetic agitation, be sufficiently mixed solution, electrophoretic paint/graphene oxide mixing plating solution
PH value is 5.8~6.2.
As a preferred embodiment, the negative electrode is low-carbon steel disc or copper sheet or other sheet metals.Negative electrode and anode electricity
It is required for first through mechanical polishing, then is handled through electrolytic degreasing before swimming deposition.
Further, the mechanical polishing, refers to：Anode, cathodic metal piece are polished respectively using sand paper, disappeared
Except surface film oxide.Then mechanically polished using polishing machine, so as to reach mirror effect.By by mechanical polishing processing
Anode, cathodic metal piece are cut into section, are cleaned by ultrasonic respectively with acetone, ethanol, and deionized water is cleaned by ultrasonic, and then uses deionization
Water is cleaned up, and is finally dried in an oven.
Further, the electrolytic degreasing processing, refers to：Sodium hydroxide solution is prepared, and adds surfactant ten
Dialkyl sulfonates, form electrolytic degreasing liquid, with titanium net as anode, copper sheet (or low-carbon steel disc) through mechanical polishing processing and
Titanium sheet is as negative electrode, the electrolytic degreasing under constant current density, is stirred during electrolytic degreasing using magneton.Then take out the moon
Pole, anode metal piece, with deionized water rinsing, the acid activation in 5~10% HCl solution is neutralized in electrolytic degreasing liquid
After NaOH, then constantly washed off with deionized water after the solute of remained on surface, finally dry for standby in an oven.
As a preferred embodiment, the electrophoretic deposition, design parameter is：Electrophoretic deposition enters in 28-35 DEG C of water-bath
OK, 5-100V DC voltage or pulse voltage is applied between electrodes, the electrophoretic deposition time is 5s-15min, graphite oxide
Alkene/electrophoretic paint composite coating thickness is 100nm-50 μm.
As a preferred embodiment, the heat treatment refers to carry out heat treatment 20- in 100-200 DEG C of baking oven
60min.100-200 DEG C of heat treatment, on the one hand solidifies to electrophoretic paint, and on the other hand, graphene oxide can be carried out
Partial reduction, further improves its mechanics, electric property.
Compared with prior art, the present invention has following beneficial effect：
The present invention proposes the enhanced electrophoretic paint composite coating of graphene oxide, and graphene oxide can not only improve electrophoretic paint
The antiseptic property of coating, also improves the hardness of the mechanical property, especially paint film of paint film, it is to avoid paint film is produced in use
Cut, improves the outward appearance and service life of paint film coating.
Embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that to the ordinary skill of this area
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection domain.
Embodiment 1
With the method for the present invention on low-carbon steel disc electrophoretic deposition graphene oxide/electrophoretic paint composite, it is including following
Step：
1. the preparation of graphene oxide dispersion
First, 10g granularities are installed in three mouthfuls of beakers for the natural graphite powder and 5g nitric acid of 325 mesh, it is cold in ice bath
But to 0 DEG C, then toward being slowly added into the 250mL concentrated sulfuric acids in beaker, and it is sufficiently stirred for 30min, it is ensured that the temperature of reaction system is 5
℃；Then a certain amount of potassium permanganate is slowly added into wherein in batches, and is continuously agitated 60min, while guarantee system
10 DEG C of temperature；Ice bath is removed after stirring, constant temperature blender with magnetic force is used instead by system temperature heating water bath to 30~40 DEG C,
Deionized water is slowly added to thereto after 2~4h of stirring reaction, is then proceeded to after 1~3h of stirring, then is added into system
30wt.% hydrogen peroxide and 30~50 DEG C of deionized water, brown graphite suspension liquid is obtained after stirring；Suspension progress will be obtained
It is ultrasonically treated and successively experience filtering, pickling (use the watery hydrochloric acid that temperature is 5~10% for 40~50 DEG C of mass percent
By filter cake cyclic washing 3 times), centrifugation and dry and (more than 24h dried in 50~70 DEG C of vacuum drying chamber) etc. after technique
To solid oxidation graphene；Solid oxidation graphene is made into the aqueous solution that concentration is 2~30mg/L, ultrasound is peeled off after 1h, obtained
To dispersed filemot graphene oxide solution.
2. the preparation of electrophoresis mixed liquor
100g electrophoretic paints black wash, 500g electrophoretic paints emulsion and 600g deionized waters are added into beaker, magnetic is utilized at room temperature
Power agitator is stirred 24 hours, cures electrophoresis liquid.Then graphene oxide solution is added, makes graphene oxide in mixing
Concentration in solution is 1.5mg/l.
3. the preparation of electrophoretic deposition electrode used therein：
(1) mechanical polishing is handled
Using sand papering low-carbon steel disc and titanium sheet, surface film oxide is eliminated.Then mechanically polished using polishing machine,
So as to reach mirror effect.Low-carbon steel disc and titanium sheet by mechanical polishing processing is cut into 50mm × 40mm small pieces, with third
Ketone, ethanol is cleaned by ultrasonic 5~10min respectively, and deionized water is cleaned by ultrasonic 1min, then cleaned up with deionized water, finally
Dry in an oven.
(2) electrolytic degreasing
The sodium hydroxide solutions of 1L 40~50% are prepared, and add 2~4mL surfactant sodium dodecyl base sodium sulfonates, are formed
Electrolytic degreasing liquid, with titanium net as anode, low-carbon steel disc and titanium sheet through mechanical polishing processing are respectively as negative electrode, in constant electricity
50~100mA/cm of current density2Stirred during 5~15min of lower electrolytic degreasing, electrolytic degreasing using magneton.Then take out negative electrode
Low-carbon steel disc and titanium sheet, with deionized water rinsing, the acid activation in 5~10% HCl solution, neutralize electrolytic degreasing liquid in
After NaOH, then constantly washed off with deionized water after the solute of remained on surface, finally dry for standby in an oven.
4. electrophoretic deposition prepares graphene oxide/electrophoretic paint laminated film
In the electrophoresis mixed solution that the low-carbon steel disc handled well and titanium sheet are prepared as negative electrode and anode insertion,
It is 15~20cm to adjust cathode and anode spacing, and makes two pole pieces parallel.Electrophoretic deposition is carried out in 30~40 DEG C of water-bath, is used
Direct current occurring source, applies 20~25V DC voltage between electrodes, and deposition is then had oxidation by 60~80s of electrophoretic deposition
The anode of graphene/electrophoretic paint laminated film takes out rapidly, and after being rinsed well with deionized water, is then placed in baking oven, 180
DEG C baking 30~50min, be then cooled to room temperature, that is, obtain graphene oxide/electrophoretic paint composite coating.Embodiment 2
With the method for the present invention on low copper sheet electrophoretic deposition graphene oxide/electrophoretic paint composite coating, including following step
Suddenly：
Step 1 in the present embodiment is identical with above-described embodiment.In step 3, except negative electrode by low-carbon steel disc changes copper into
It is other also identical with above-described embodiment outside piece.
The difference is that step 2 and step 4, as follows respectively：
2. the preparation of electrophoresis mixed liquor
100g electrophoretic paints black wash, 500 electrophoretic paint emulsions and 600g deionized waters are added into beaker, magnetic is utilized at room temperature
Power agitator is stirred 24 hours.Then graphene oxide solution is added, it is 10 to make concentration of the graphene oxide in mixed solution
~20mg/l.
4. electrophoretic deposition prepares graphene oxide/electrophoretic paint laminated film
Using the copper sheet handled well and titanium sheet as negative electrode and anode, the electrophoretic paint/graphene oxide prepared is placed in
In composite plating bath.Electrophoretic deposition is carried out in 30~40 DEG C of water-bath, using the pulse power, apply 40 between electrodes~
Deposition is then had the anode of graphene oxide/electrophoretic paint laminated film rapid by 45V DC voltage, 30~40s of electrophoretic deposition
Take out, and after being rinsed well with deionized water, toast 90~120min at 150~200 DEG C, be then cooled to room temperature, that is, obtain
Graphene oxide/electrophoretic paint composite coating.
The stretching experiment of film shows, for 20 microns of thick films, and the tensile strength of electrophoretic paint film is 51MP, Young
Modulus is 1.5GPa.The tensile strength of the graphene oxide obtained in above-described embodiment/electrophoretic paint composite coating is 70-
120Mpa, Young's modulus is 2-5GPa, and the mechanical property of graphene oxide/electrophoretic paint composite coating is apparently higher than electrodeposited paint film.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substance of the present invention.
Claims (9)
1. a kind of graphene oxide/electrophoretic paint composite coating, it is characterised in that：The coating is a kind of graphene oxide and electrophoresis
Paint the uniform mixed coating constituted, i.e., the composite coating prepared using mixing depositing process.
2. graphene oxide according to claim 1/electrophoretic paint composite coating, it is characterised in that：Graphene oxide is uniform
It is distributed in electrophoretic paint coating, weight content of the graphene oxide in composite coating is more than 0 and less than or equal to 30%.
3. a kind of electrophoretic deposition preparation side of graphene oxide/electrophoretic paint composite coating described in any of the above-described claim
Method, it is characterised in that：Methods described step is as follows：
Step one, using sheet metal as negative electrode, titanium sheet is respectively perpendicular electrophoretic paint/oxidation stone that insertion is prepared as anode
In black alkene mixing plating solution；
Step 2, electrophoretic deposition is carried out to above-mentioned electrophoretic paint/graphene oxide mixing plating solution；
Step 3, will deposit the anode that has electrophoretic paint/graphene oxide film and takes out, and after rinsing well, is heat-treated, and
After be cooled to room temperature, so as to obtain graphene oxide/electrophoretic paint composite deposite.
4. the electrophoretic deposition preparation method of graphene oxide according to claim 3/electrophoretic paint composite coating, its feature exists
In：The electrophoretic paint/graphene oxide mixing plating solution, configuration step is as follows：
The preparation of step 1. graphene oxide dispersion
Graphene oxide solution by graphite powder is carried out at low temperature Strong oxdiative method prepare, finally give it is dispersed,
Concentration is 0.1mg/L~1g/L yellowish-brown graphene oxide solution；
The preparation of step 2. electrophoresis mixed liquor
By electrophoretic paint black wash, emulsion, graphene oxide solution and deionized water add a glass container in, graphene oxide it is dense
Spend for 0.5-50mg/L, at room temperature with magnetic agitation, be sufficiently mixed solution, electrophoretic paint/graphene oxide mixing plating solution
PH value is 5.8~6.2.
5. the electrophoretic deposition preparation method of graphene oxide according to claim 3/electrophoretic paint composite coating, its feature exists
In：The negative electrode is low-carbon steel disc or copper sheet, is required for before negative electrode and anodic electrophoretic deposition first through mechanical polishing, then is removed through electrolysis
Oil processing.
6. the electrophoretic deposition preparation method of graphene oxide according to claim 5/electrophoretic paint composite coating, its feature exists
In：The mechanical polishing, refers to：Anode, cathodic metal piece are polished respectively using sand paper, surface film oxide is eliminated, so
Mechanically polished afterwards using polishing machine, so as to reach mirror effect；By the anode by mechanical polishing processing, cathodic metal piece
Section is cut into, is cleaned by ultrasonic respectively with acetone, ethanol, deionized water is cleaned by ultrasonic, and is then cleaned up with deionized water, finally
Dry in an oven.
7. the electrophoretic deposition preparation method of graphene oxide according to claim 5/electrophoretic paint composite coating, its feature exists
In：The electrolytic degreasing processing, refers to：Sodium hydroxide solution is prepared, and adds surfactant sodium dodecyl base sodium sulfonate, is formed
Electrolytic degreasing liquid, with titanium net as anode, copper sheet or low-carbon steel disc and titanium sheet through mechanical polishing processing are as negative electrode, constant
Stirred during electrolytic degreasing under current density, electrolytic degreasing using magneton；Then take out negative electrode, anode metal piece, spend from
Sub- water is rinsed, the acid activation in 5~10% HCl solution, is neutralized after the NaOH in electrolytic degreasing liquid, then continuous with deionized water
After the solute for washing off remained on surface, last dry for standby in an oven.
8. the electrophoretic deposition preparation method of graphene oxide/electrophoretic paint composite coating according to claim any one of 3-7,
It is characterized in that：The electrophoretic deposition, design parameter is：Electrophoretic deposition is carried out in 28-35 DEG C of water-bath, between electrodes
Apply 5-100V DC voltage or pulse voltage, the electrophoretic deposition time is 5s-15min, and graphene oxide/electrophoretic paint is compound to be applied
Tunic thickness is 100nm-50 μm.
9. the electrophoretic deposition preparation method of graphene oxide/electrophoretic paint composite coating according to claim any one of 3-7,
It is characterized in that：The heat treatment, refers to carry out heat treatment 20-60min in 100-200 DEG C of baking oven.
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| CN108341467A (en) * | 2018-03-09 | 2018-07-31 | 陕西科技大学 | A kind of application of Ag/GO/Ti electrodes with preparation method and its in going water removal in nitrate |
| CN109111782A (en) * | 2018-07-19 | 2019-01-01 | 浩力森化学科技（江苏）有限公司 | The preparation method of modified graphene oxide dispersion liquid and modified electrophoretic coating |
| CN112680016A (en) * | 2020-12-22 | 2021-04-20 | 余小翠 | Automobile paint component and preparation method thereof |
| CN113584550A (en) * | 2021-09-03 | 2021-11-02 | 北京航空航天大学杭州创新研究院 | Anode electrophoretic paint mediated electrochemical assembly graphene heat dissipation layer and preparation method thereof |
| CN115477877B (en) * | 2022-10-12 | 2024-01-09 | 雅迪科技集团有限公司 | Composition for electrophoresis pretreatment coating and preparation method and application thereof |
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