CN107603425A - A kind of preparation method of Superhydrophilic coating - Google Patents
A kind of preparation method of Superhydrophilic coating Download PDFInfo
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- CN107603425A CN107603425A CN201710873432.7A CN201710873432A CN107603425A CN 107603425 A CN107603425 A CN 107603425A CN 201710873432 A CN201710873432 A CN 201710873432A CN 107603425 A CN107603425 A CN 107603425A
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Abstract
The present invention relates to a kind of Superhydrophilic coating and preparation method thereof, belong to hydrophilic coating technical field.The present invention is added by hydroxypropyl cellulose reduces the reunion degree of titanium dioxide granule,Particle is uniformly distributed,And particle diameter diminishes,Titania nanosizing,And then titanium dioxide is set to possess bigger specific surface area,Make the increase of titanium dioxide surface roughness,And the monodispersity of titanium dioxide is advantageous to the light induced electron in titanium dioxide granule and the transformation and generation in hole,So that the photocatalysis performance of coating is improved,And cause titanium dioxide granule nanosizing and surface roughness increase,Adsorb water droplet,Water droplet constantly can spread out to form moisture film,So that the hydrophilicity of coating is improved,Zirconium oxide is introduced in titanium dioxide simultaneously and improves efficiency of light absorption,Increase surface area,Reduce the recombination rate of electron hole,So as to improve photocatalysis performance,Epoxide hole can form hydrophilic area in the surface of solids,And then form water-wetted surface,Improve hydrophilicity.
Description
Technical field
The present invention relates to a kind of preparation method of Superhydrophilic coating, belong to hydrophilic coating technical field.
Background technology
Superhydrophilic coating is a kind of new coating, the contact angle of water and stromal surface can be dropped into less than ten degree, very
To reaching zero degree.Anatase-type nanometer titanium dioxide is the main component in Superhydrophilic coating, because its catalytic performance is good
And a kind of optimal catalysis material is considered as by scientific research circle, it is widely used in building, the place that medical science and bacterium easily breed.Especially
It is under ultraviolet light, the titanium dioxide of Detitanium-ore-type can show high photocatalysis efficiency.Titanium dioxide is because of its catalytic
And there is super hydrophilic characteristic, the drop of stromal surface can be spread out to form moisture film rapidly, after reaching a certain size, due to universal
Graviational interaction so that the organic matter of stromal surface easily can be taken away by moisture film, make stromal surface have spy easy to clean
Property, therefore particularly suitable for outdoor building object table face.
Photocatalysis oxidation technique is actually the process that luminous energy is changed into chemical energy, and it can decomposite the hydrogen in water
Come, and organic matter exhaustive oxidation can be resolved into small molecule.Especially in terms of greenhouse effects and environmental pollution, it has very big
Potentiality.Substantial amounts of experimental studies results show:The spot of glass surface, oil stain, the organic matter such as bacterium of apparatus can be transferred through
This technology is effectively degraded, and last mineralising is water and carbon dioxide, will not cause secondary pollution to environment.TiO2Have
Excellent photocatalysis performance, it is considered as a kind of more satisfactory conductor photocatalysis material by the mankind, in material circle, medical field, boat
Paid close attention to by the mankind in the fields such as empty space flight.Optically catalytic TiO 2 performance plays a leading role in Superhydrophilic coating, reality
In life, people often it be referred to as
Titanium dioxide, it mainly has rutile crystal type and anatase crystal.The two compares, and rutile has that stability is good, high rigidity
With the characteristic such as high density.But Detitanium-ore-type albedo is strong, catalytic performance is high.The photocatalysis performance of nano titanium oxide is higher,
The hydrophily of Superhydrophilic coating is better.Hydrophilic Mechanism:A kind of is the material such as nanometer titanium dioxide for having photocatalysis performance
Titanium, after it is radiated by 300nm-750nm wave band, the angle of wetting of water droplet and the surface of solids is set to be changed into less than 10 degree,
The surface of solids forms moisture film.Titanium dioxide occurs light and urged
The premise for changing reaction is to contain bridge location oxygen in its structure.Especially under ultraviolet light, it is free to generate active oxygen
Base, easily form epoxide hole with oxygen.At the same time, epoxide hole can form hydrophilic area in the surface of solids, and then be formed hydrophilic
Surface, still, hydrophilic surface caused by this mode are simultaneously unstable, and when no light, the hydroxyl on surface can be quickly by other
Material is substituted, and causes it to lose hydrophily.Therefore, for the further investigation of Superhydrophilic coating, it appears particularly important.
The content of the invention
The technical problems to be solved by the invention:Weak for traditional Superhydrophilic coating photocatalysis performance, hydrophilicity is poor
The problem of, there is provided a kind of preparation method of super hydrophilic coating.
In order to solve the above technical problems, the technical solution adopted by the present invention is:
1. a kind of Superhydrophilic coating, it is characterised in that including following weight parts raw material:50~60 parts of acrylic resins,
10~20 parts of multilevel hierarchy composite titanium dioxide microballoons, 1~2 part of silane coupler, 0.1~0.3 portion of preservative, 0.1~
0.2 part of defoamer, 20~40 parts of deionized waters.
The multilevel hierarchy composite titanium dioxide microballoon be nano titanium oxide P25, zinc oxide, zirconium oxide composition it is polynary
Compound mixes with polyethylene glycol, then is configured to slurry with Triton X-100, mass fraction for 10% salpeter solution,
It is that 5% hydrochloric acid removes zinc oxide coated in calcining organics removal after film forming on slide, then with mass fraction, filtering washing is dry
It is dry to be made.
The nano titanium oxide P25, zinc oxide, the parts by weight of zirconium oxide are 10~20 parts of nano titanium oxide P25,1
~2 parts of zinc oxide, 1~2 part of zirconium oxide.
The mass ratio of the multiple element compound and polyethylene glycol is 3:1.
The slurry has following weight parts raw material to be made:4~5 parts of mixed-powders, 0.1~0.2 part of hydroxypropyl cellulose,
0.4~0.5 part of Triton X-100,8~10 parts of mass fractions are 10% salpeter solution.
The calcination process is that 1~2h is calcined at 450~500 DEG C.
The acrylic resin is appointing in epoxy acrylic resin, polyurethane acrylic resin and polyester acrylate resin
Meaning is a kind of.
The preservative is common antimildew disinfectant, and described defoamer is organosilicon polymer defoamer.
Concretely comprise the following steps:
S1. nano titanium oxide P25, zinc oxide, zirconium oxide are taken, is fitted into 1~2h of ball milling in ball grinder, obtains the multiple element compound;
S2. in mass ratio 3:The multiple element compound is mixed and is fitted into 10~12h of ball milling in ball grinder by 1 with polyethylene glycol, obtains mixed powder
End;
S3. mixed-powder, Triton X-100 are taken, it is that 20~24h is stirred in 10% salpeter solution to add mass fraction,
Obtain slurry;
S4. slurry is fitted into coating machine and be coated uniformly on slide, film is taken off after natural air drying, be placed in calcining in tube furnace
1~2h, 30~40min in hydrochloric acid is immersed in after cooling, filters washing and drying, obtain multilevel hierarchy composite titanium dioxide microballoon;
S5. acrylic resin, multilevel hierarchy composite titanium dioxide microballoon, silane coupler, preservative, defoamer, deionization are taken
Water, it is fitted into homogenizer, 20~30min is stirred with 1500~2000r/min, obtains Superhydrophilic coating.
Compared with other method, advantageous effects are the present invention:
(1)The present invention is added by hydroxypropyl cellulose makes that the reunion degree of titanium dioxide granule is reduced, particle is uniformly distributed, and
And particle diameter diminishes, titania nanosizing, and then titanium dioxide is possessed bigger specific surface area, make titanium dioxide surface
Roughness increase, and the monodispersity of titanium dioxide is advantageous to the light induced electron in titanium dioxide granule and the transformation in hole
And generation so that the photocatalysis performance of coating is improved, and causes titanium dioxide granule nanosizing and surface roughness increase,
Water droplet is adsorbed, water droplet constantly can be spread out to form moisture film so that the hydrophilicity of coating is improved;
(2)The present invention is mixed with multilevel hierarchy composite titanium dioxide microballoon by many kinds of substance, not only with spherical structure
Advantage, and lifted in performance, introduced in titanium dioxide zirconium oxide improve efficiency of light absorption, increase surface area,
The recombination rate of electron-hole is reduced, so as to improve photocatalysis performance, epoxide hole can form hydrophilic area in the surface of solids, and then
Water-wetted surface is formed, improves hydrophilicity.
Embodiment
Take 10~20g nano titanium oxides P25,1~2g zinc oxide, 1~2g zirconium oxides, be fitted into ball milling 1 in ball grinder~
2h, obtain the multiple element compound, in mass ratio 3:The multiple element compound is mixed and is fitted into ball grinder by 1 with polyethylene glycol, with 180~
360r/min 10~12h of ball milling, obtain mixed-powder, take 4~5g mixed-powders, 0.1~0.2g hydroxypropyl celluloses, 0.4~
0.5g Triton X-100s, it is to stir 20 in 10% salpeter solution with 300~400r/min to add 8~10g mass fractions
~24h, obtains slurry, and slurry is fitted into coating machine and is coated uniformly on slide, and film is taken off after natural air drying, is placed in tube furnace
In, 1~2h is calcined at 450~500 DEG C, mass fraction is immersed in as 30~40min in 5% hydrochloric acid after naturally cooling to room temperature,
Filter residue is filtered to obtain, filter residue is washed with deionized to cleaning solution in neutrality, then is transferred in drying box, is dried at 105~110 DEG C
To constant weight, multilevel hierarchy composite titanium dioxide microballoon is obtained, is counted in parts by weight, take 50~60 parts of acrylic resins, 10~20 parts
Multilevel hierarchy composite titanium dioxide microballoon, 1~2 part of silane coupler, 0.1~0.3 portion of preservative, 0.1~0.2 part of defoamer,
20~40 parts of deionized waters, are fitted into homogenizer, and 20~30min is stirred with 1500~2000r/min, obtain Superhydrophilic painting
Material.
Example 1
10g nano titanium oxides P25,1g zinc oxide is taken, 1g zirconium oxides, is fitted into ball milling 1h in ball grinder, obtains the multiple element compound, press
Mass ratio 3:The multiple element compound is mixed and is fitted into ball grinder by 1 with polyethylene glycol, with 180r/min ball milling 10h, obtains mixed-powder,
4g mixed-powders are taken, 0.1g hydroxypropyl celluloses, 0.4g Triton X-100s, it is 10% nitric acid to add 8g mass fractions
20h is stirred with 300r/min in solution, slurry is obtained, slurry is fitted into coating machine and is coated uniformly on slide, natural air drying
After take off film, be placed in tube furnace, 1h calcined at 450 DEG C, it is 5% hydrochloric acid to naturally cool to after room temperature and be immersed in mass fraction
Middle 30min, filter residue is filtered to obtain, filter residue is washed with deionized to cleaning solution in neutrality, then be transferred in drying box, at 105 DEG C
Dry to constant weight, obtain multilevel hierarchy composite titanium dioxide microballoon, count in parts by weight, take 50 parts of acrylic resins, 10 parts of multistages
Structure composite titanium dioxide microballoon sphere, 1 part of silane coupler, 0.1 portion of preservative, 0.1 part of defoamer, 20 parts of deionized waters, load
In homogenizer, 20min is stirred with 1500r/min, obtains Superhydrophilic coating.
Example 2
15g nano titanium oxides P25,1.5g zinc oxide is taken, 1.5g zirconium oxides, is fitted into ball milling 1.5h in ball grinder, is obtained polynary multiple
Compound, in mass ratio 3:The multiple element compound is mixed and is fitted into ball grinder by 1 with polyethylene glycol, with 270r/min ball milling 11h, is obtained mixed
Powder is closed, 4.5g mixed-powders is taken, 0.15g hydroxypropyl celluloses, 0.45g Triton X-100s, adds 9g mass point
Number is to stir 22h in 10% salpeter solution with 350r/min, obtains slurry, slurry is fitted into coating machine and is coated uniformly on slide
On, film is taken off after natural air drying, is placed in tube furnace, 1.5h is calcined at 470 DEG C, quality is immersed in after naturally cooling to room temperature
Fraction is 35min in 5% hydrochloric acid, filters to obtain filter residue, filter residue is washed with deionized to cleaning solution in neutrality, then be transferred to drying box
In, dried at 107 DEG C to constant weight, obtain multilevel hierarchy composite titanium dioxide microballoon, count in parts by weight, take 55 parts of acrylic acid trees
Fat, 15 parts of multilevel hierarchy composite titanium dioxide microballoons, 1 part of silane coupler, 0.2 portion of preservative, 0.1 part of defoamer, 30 parts are gone
Ionized water, it is fitted into homogenizer, 25min is stirred with 1700r/min, obtains Superhydrophilic coating.
Example 3
20g nano titanium oxides P25,2g zinc oxide is taken, 2g zirconium oxides, is fitted into ball milling 2h in ball grinder, obtains the multiple element compound,
In mass ratio 3:The multiple element compound is mixed and is fitted into ball grinder by 1 with polyethylene glycol, with 360r/min ball milling 12h, obtains mixed powder
End, 5g mixed-powders are taken, 0.2g hydroxypropyl celluloses, 0.5g Triton X-100s, it is 10% to add 10g mass fractions
24h is stirred with 400r/min in salpeter solution, obtains slurry,
Slurry is fitted into coating machine and is coated uniformly on slide, film is taken off after natural air drying, is placed in tube furnace, 500
2h is calcined at DEG C, mass fraction is immersed in as 40min in 5% hydrochloric acid after naturally cooling to room temperature, filters to obtain filter residue, use deionization
Water washing filter residue to cleaning solution is in neutrality, then is transferred in drying box, is dried at 110 DEG C to constant weight, obtains multilevel hierarchy compound two
Titania microsphere, count in parts by weight, take 60 parts of acrylic resins, 20 parts of multilevel hierarchy composite titanium dioxide microballoons, 2 parts of silane
Coupling agent, 0.3 portion of preservative, 0.2 part of defoamer, 40 parts of deionized waters, it is fitted into homogenizer, is stirred with 2000r/min
30min, obtain Superhydrophilic coating.
The hydrophilic coating that a kind of Superhydrophilic coating being prepared into and Dongguan company produce is detected, specific detection
It is as follows:
(1)Photocatalysis performance is tested
By determining the photocatalysis performance of nano-titanium dioxide film, degradation rate to the measure of methyl orange solution degradation rate
It is proportional with catalytic performance.The degradation rate of methyl orange, the calculation formula of its degradation rate can be calculated by formula
For:η=[(A0-At)/A0] ×100%
In formula:η is degradation rate;A0For initial absorbance;At is the absorbance at t moment.
(2)Contact angle is tested
Contact angle is a data for characterizing material surface wetability.The various of material surface can be obtained by contact angle
Useful information.This time the instrument used in actual measured amount is SL200B type contact angle instruments.Using deionized water as water droplet, its
When water droplet and solid form stable state, its angle of wetting is measured using goniometry in 3 μ L-6 μ L for the fixing fabric structure often dripped.
Specific test result such as table 1.
The Superhydrophilic coating property of table 1 characterizes
As shown in Table 1, a kind of Superhydrophilic coating produced by the present invention, photocatalysis performance is improved, contact angle is almost nil, enters
And water-wetted surface is formed, improve hydrophilicity.
Claims (9)
1. a kind of Superhydrophilic coating, it is characterised in that including following weight parts raw material:50~60 parts of acrylic resins,
10~20 parts of multilevel hierarchy composite titanium dioxide microballoons, 1~2 part of silane coupler, 0.1~0.3 portion of preservative, 0.1~
0.2 part of defoamer, 20~40 parts of deionized waters.
2. a kind of Superhydrophilic coating as claimed in claim 1, it is characterised in that the multilevel hierarchy composite titanium dioxide is micro-
Ball be nano titanium oxide P25, zinc oxide, zirconium oxide composition the multiple element compound mixed with polyethylene glycol, then with polyethylene glycol
Octyl phenyl ether, mass fraction are that 10% salpeter solution is configured to slurry, are removed coated in calcining after film forming on slide organic
Thing, then zinc oxide is removed for 5% hydrochloric acid with mass fraction, filtering washing and drying is made.
3. a kind of Superhydrophilic coating as claimed in claim 2, it is characterised in that the nano titanium oxide P25, oxidation
Zinc, the parts by weight of zirconium oxide are 10~20 parts of nano titanium oxide P25,1~2 part of zinc oxide, 1~2 part of zirconium oxide.
4. a kind of Superhydrophilic coating as claimed in claim 2, it is characterised in that the multiple element compound and polyethylene glycol
Mass ratio is 3:1.
5. a kind of Superhydrophilic coating as claimed in claim 2, it is characterised in that the slurry has following weight parts raw material system
Into:4~5 parts of mixed-powders, 0.1~0.2 part of hydroxypropyl cellulose, 0.4~0.5 part of Triton X-100,8~10 parts
Mass fraction is 10% salpeter solution.
6. a kind of Superhydrophilic coating as claimed in claim 2, it is characterised in that the calcination process is at 450~500 DEG C
1~2h of lower calcining.
7. a kind of Superhydrophilic coating as claimed in claim 1, it is characterised in that the acrylic resin is epoxy acrylic
Any one in resin, polyurethane acrylic resin and polyester acrylate resin.
8. a kind of Superhydrophilic coating as claimed in claim 1, it is characterised in that the preservative is common antimycotic antiseptic
Agent, described defoamer are organosilicon polymer defoamer.
9. the preparation method of a kind of Superhydrophilic coating as described in claim 1~8 any one, it is characterised in that specific
Step is:
S1. nano titanium oxide P25, zinc oxide, zirconium oxide are taken, is fitted into 1~2h of ball milling in ball grinder, obtains the multiple element compound;
S2. in mass ratio 3:The multiple element compound is mixed and is fitted into 10~12h of ball milling in ball grinder by 1 with polyethylene glycol, obtains mixed powder
End;
S3. mixed-powder, Triton X-100 are taken, it is that 20~24h is stirred in 10% salpeter solution to add mass fraction,
Obtain slurry;
S4. slurry is fitted into coating machine and be coated uniformly on slide, film is taken off after natural air drying, be placed in calcining in tube furnace
1~2h, 30~40min in hydrochloric acid is immersed in after cooling, filters washing and drying, obtain multilevel hierarchy composite titanium dioxide microballoon;
S5. acrylic resin, multilevel hierarchy composite titanium dioxide microballoon, silane coupler, preservative, defoamer, deionization are taken
Water, it is fitted into homogenizer, 20~30min is stirred with 1500~2000r/min, obtains Superhydrophilic coating.
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CN108467537A (en) * | 2018-04-04 | 2018-08-31 | 田秋珍 | A kind of antifog plastic greenhouse film and preparation method thereof |
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