CN109627978A - A kind of super-hydrophobic coating of resistance to water slug and preparation method thereof - Google Patents
A kind of super-hydrophobic coating of resistance to water slug and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
- C09D183/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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Abstract
The invention discloses super-hydrophobic coatings of a kind of resistance to water slug and preparation method thereof.The coating includes that fluororesin, low-surface-energy filler 1, low-surface-energy filler 2 and isocyanate curing agent solidify at room temperature；Wherein low-surface-energy filler 1 and low-surface-energy filler 2 are respectively combination or low-surface-energy filler 1 and low-surface-energy filler 2 nano particle that be partial size different of nano bar-shape and nano particle, and the partial size ratio of low-surface-energy filler 1 and low-surface-energy filler 2 is greater than 10.Using the composite filling of nanometer rods and nano particle, or the composite filling of big partial size ratio, prepares coating surface microstructure are easier to maintain stable Cassie model, and water droplet remains to tumble in coating surface under impact.And since the contact area between nanometer rods (line) or large particle size filler and fluororesin matrix is larger, abrasion, which falls off, needs to overcome biggish resistance, thus coating wearability itself is preferable, can guarantee the persistence of super-hydrophobic effect.
Description
Technical field
The invention belongs to super-hydrophobic coat preparing technology fields, and in particular to a kind of super-hydrophobic coating of resistance to water slug and its
Preparation method.
Background technique
Super-hydrophobic coating, which refers to, coats one or more layers super hydrophobic material in the surface of solids, to have the water higher than 150 ° to connect
Feeler and roll angle lower than 10 °, realize the functions such as its anticorrosion, waterproof, ice-covering-proof, antifog.The preparation side of super-hydrophobic coating
Method has template method, sol-gel method, chemical vapour deposition technique, self-assembly method, phase separation method, etching method etc., and preparation process is multiple
Miscellaneous, at high cost and be unfavorable for large-scale production, the weatherability for the coating being prepared into is usually bad.
Cassie and Baxter think that water droplet in the contact of both ultrahydrophobic is a kind of composite contact.In Cassie state
Under, solid liquid interface area fraction very little, water droplet is largely in contact with air, and the coarse structure of both ultrahydrophobic can generate very much
Air bag water droplet is held up.However, the micro-rough structure that super-hydrophobic coating is constructed be not it is unbreakable, in water droplet
Or under the high impact speed of drop, impact force can be easily by the sky of the retention of super-hydrophobic coating micro-rough inside configuration groove
Gas discharge, directly results in that contact angle is substantially reduced or roll angle is significantly promoted, to lose the advantage of ultraphobic water-bound.
At present for the research of super-hydrophobic coating, most of preparation methods for focusing on super-hydrophobic coating, weatherability and resistance to
The improvement of mill property, it is rare to study the water-fast impact for focusing on super-hydrophobic coating, however water-fast impact is that super-hydrophobic coating is real
One of the essential index of existing practical application.In a natural environment, the rain insensitive device speed of heavy rain or heavy rain is very important,
If not having certain water-fast impact, super-hydrophobic coating, which has no advantage, to be sayed.
Summary of the invention
In order to overcome the deficiencies of the prior art, the present invention provides a kind of super-hydrophobic coating of resistance to water slug and its preparation sides
Method.The super-hydrophobic coating be by fluororesin, low-surface-energy filler 1, low-surface-energy filler 2 and isocyanate curing agent at room temperature
Solidify, remains to even if the water droplet that prepared super-hydrophobic coating diameter is 5mm is dripped in the case where being higher than 100cm from coating surface
It pops up or tumbles, super-hydrophobic effect is fabulous, and has lasting wearability.
To realize that the above technical purpose, the present invention are achieved through the following technical solutions: a kind of super-hydrophobic of resistance to water slug
Coating, including fluororesin, low-surface-energy filler 1, low-surface-energy filler 2 and isocyanate curing agent, fluororesin by with isocyanide
Acid esters curing agent carries out crosslinking and realizes solidification, wherein low-surface-energy filler 1 and low-surface-energy filler 2 respectively nano bar-shape with receive
The combination of rice grain or low-surface-energy filler 1 and low-surface-energy filler 2 nano particle that be partial size different, low-surface-energy filler 1
It is greater than 10 with the partial size ratio of low-surface-energy filler 2.Using the composite filling of nanometer rods and nano particle, or the combination of big partial size ratio
Filler, prepares coating surface microstructure are easier to maintain stable Cassie model, and water droplet is remained under impact in coating table
Face tumbles.And since the contact area between nanometer rods (line) or large particle size filler and fluororesin matrix is larger, abrasion falls off
It needs to overcome biggish resistance, thus coating wearability itself is preferable, can guarantee the persistence of super-hydrophobic effect.
The fluororesin is three fluorine-type FEVE resin of room temperature curing, four fluorine-type FEVE resins, fluorine richness silicone resin, fluorine richness
One or more of mixtures of acrylic resin etc..Use fluororesin for film-forming resin, surface can low, excellent in weather.
The low-surface-energy filler 1 is the modified nanofiller of silicon fluoride, and the nanofiller is attapulgite, carbon fiber
Dimension, carbon nanotube, the SiO that partial size is 0.5-20 μm2、Al2O3、CaCO3Deng one or more of mixtures.The silicon fluoride
For the mixture of one or both of perfluoro capryl triethoxysilane, perfluoro decyl triethoxysilane.
The low-surface-energy filler 2 is the nanofiller modified using silicon fluoride, and the nanofiller is that partial size is 5-
The SiO of 100nm2、Al2O3、CaCO3Deng one or more of mixtures.
The preparation step of the silicon fluoride modified Nano filling are as follows: nanofiller is added in ethyl alcohol and passes through shearing-ultrasound-
The endless form of shearing is dispersed, and is exported by shearing dispersion and the energy of large power supersonic, is realized the high degree of dispersion of nanofiller,
The hydrolyzate of silicon fluoride is added afterwards, wherein silicon fluoride and the mass ratio of nanofiller are 0.2-0.5:1.Then at 100 DEG C -120
DEG C back flow reaction 22 hours or more, silicon fluoride modified Nano filling can be obtained in centrifugal drying.The hydrolyzate of the silicon fluoride is
Silicon fluoride, deionized water, dehydrated alcohol are 3 according to the pH value of 5~1 ︰ of mass ratio 1 ︰, 1 ︰, 1.5 ︰ 15 (1 ︰ of preferably 1 ︰, 5~1 ︰, 1 ︰ 10)
~5 mixed liquor.
Further, a kind of super-hydrophobic coating of resistance to water slug of the present invention, is the coating room temperature curing by certain component
Form, wherein in coating each component parts by weight are as follows: 20-40 parts of fluororesin, 3-40 parts of low-surface-energy nano-attapulgite, low surface
It can Nano-meter SiO_224-30 parts, 20-60 parts and isocyanate curing agent 2-7 parts of organic solvent.
Preferably, the fluororesin is fluorinated silicone modified resin (abbreviation fluorine silicon resin)；The low-surface-energy concave convex rod is complete
Fluorine decyl (or octyl) triethoxysilane modified attapulgite, diameter 3-10nm, length are 0.1-1 μm；The low surface
It can Nano-meter SiO_22For the modified SiO of perfluoro decyl (or octyl) triethoxysilane2, partial size 20-100nm；The organic solvent
For the mixed solvent of butyl acetate and dimethylbenzene, mass ratio is (1-3) ︰ 1；The isocyanate curing agent is HDI trimer, excellent
It is selected as Bayer Bitterfeld GmbH N3390.
Further, a kind of super-hydrophobic coating of resistance to water slug of the present invention, is the coating by another certain component
Room temperature curing forms, wherein in coating each component parts by weight are as follows: 20-60 parts of fluororesin, the big partial size SiO of low-surface-energy2 5-20
Part, low-surface-energy small particle SiO25-20 parts, 20-60 parts of organic solvent, 2-7 parts of isocyanate curing agent.
Preferably, the fluororesin is modified fluoro-silicone resin (fluorine silicon resin)；The big partial size SiO of low-surface-energy2It is complete
Fluorine octyl (or decyl) triethoxysilane is modified SiO2, partial size is 2-20 μm；The low-surface-energy small particle SiO2For perfluor
Decyl (or octyl) triethoxysilane is modified SiO2, partial size 20-100nm；The organic solvent is butyl acetate and two
The mixed solvent of toluene, mass ratio are (1-3) ︰ 1；The isocyanate curing agent is HDI trimer, preferably Bayer Bitterfeld GmbH
N3390。
A kind of super-hydrophobic coating of resistance to water slug of the present invention, through the following steps that being prepared: by low-surface-energy filler 1
It is mixed with low-surface-energy filler 2, is added in organic solvent and dispersion 30min-1h is carried out using large power supersonic dispersion, to dispersion
Fluororesin is added in uniform filler suspension, 1h-2h is mixed using mechanical stirring first, is ground afterwards using blue-type mulling machine
30min-1h can obtain coating composition A.Before coating construction, component A is proportionally mixed with isocyanate curing agent
It is even, the super-hydrophobic coating of resistance to water slug can be obtained coated in substrate surface drying at room temperature.
The large power supersonic dispersion power is 50W-100W.When power is too low, some particle agglomerations can not be opened,
Influence mixing and the dispersion effect of filler；Power is excessively high, and dispersion liquid heating is too fast, and generates the more bubble for being difficult to eliminate, shadow
Post-coatings preparation is rung, and causes the waste of energy.
The mechanical stirring speed is 500rpm-1500rpm.When mixing speed is too low, weaken the mixing of filler and resin
Effect；Mixing speed is excessively high, and the vortex of generation can be involved in large quantity of air, is unfavorable for the defoaming of coating itself.
Have the advantage that (1) preparation process is simple in the present invention, large-scale production application easy to accomplish；(2) low surface
Energy, weatherability are good, can be realized long service；(3) super-hydrophobic effect is good, and coating surface is not easy to be infected with floating ash, and water droplet tumbled
Pollutant can be taken out of surface to realize the automatically cleaning on surface by journey；(4) composite filling of nanometer rods and nano particle is used,
Or the composite filling of big partial size ratio, prepares coating surface microstructure are easier to maintain stable Cassie model, water droplet is one
It remains to tumble in coating surface under fixed velocity shock and leave no trace；(5) due to nanometer rods (line) or large particle size filler and fluorine
Contact area between resin matrix is larger, and abrasion, which falls off, needs to overcome biggish resistance, thus coating wearability itself is preferable,
It can guarantee the persistence of super-hydrophobic effect.
Specific embodiment
Below with reference to embodiment, the present invention is further described.
Although specific embodiment is described in the present invention, it is not intended to limit the protection scope of the present invention, affiliated
Field technical staff should be understood that based on the technical solutions of the present invention those skilled in the art do not need to pay creation
Property the labour various modifications or changes that can make still within protection scope of the present invention.
Embodiment 1
1) silicon fluoride modified Nano concave convex rod is prepared
6 parts of deionized waters are mixed with 30 parts of dehydrated alcohols, the pH value with acetic acid adjustment mixed liquor is 4.6 parts are added to it
Perfluoro capryl triethoxysilane magnetic agitation 30 minutes, promotes silicon fluoride to be fully hydrolyzed.
30 parts of concave convex rods are added in 400 parts of dehydrated alcohols, high-shearing dispersion emulsifying machine 6000rpm shearing dispersion 20min,
30min is dispersed using large power supersonic 80W afterwards, again using 6000rpm shearing dispersion 20min.
Silicon fluoride hydrolyzate is added in the dispersion liquid of concave convex rod, 100 DEG C of -120 DEG C of back flow reactions for 24 hours, centrifugation is dry
Dry that silicon fluoride modified Nano concave convex rod can be obtained, diameter 3-10nm, length is 0.1-1 μm.
2) silicon fluoride modified Nano SiO is prepared2
6 parts of deionized waters are mixed with 60 parts of dehydrated alcohols, the pH value with acetic acid adjustment mixed liquor is 4.6 parts are added to it
Perfluoro capryl triethoxysilane magnetic agitation 30 minutes, promotes silicon fluoride to be fully hydrolyzed.
20 parts of partial sizes are 20nm Nano-meter SiO_22Be added in 400 parts of dehydrated alcohols, 6000rpm shearing dispersion 20min, after adopt
Disperse 30min with large power supersonic, again using 6000rpm shearing dispersion 20min.
Silicon fluoride hydrolyzate is added to Nano-meter SiO_22Dispersion liquid in, 100 DEG C of -120 DEG C of back flow reactions for 24 hours, centrifugation
Silicon fluoride modified Nano SiO can be obtained in drying2。
3) the super-hydrophobic coating of resistance to water slug is prepared
The super-hydrophobic coating of the resistance to water slug of the present embodiment, be formed by the coating room temperature curing of certain component, wherein
The parts by weight of each component in coating are as follows: 33 parts of fluorine silicon resin；15 parts of concave convex rod of perfluoro capryl triethoxysilane modified Nano；Entirely
Fluorine octyltri-ethoxysilane modified Nano SiO25 parts；39 parts of butyl acetate；13 parts of dimethylbenzene；3 parts of Bayer B3390.This reality
The super-hydrophobic coating for applying the resistance to water slug of lasting wear-resisting type in example, through the following steps that being prepared: by three second of perfluoro capryl
Oxysilane modified Nano concave convex rod and perfluoro capryl triethoxysilane modified Nano SiO2It proportionally mixes, has been added to
Dispersion 30min is carried out using large power supersonic dispersion 80W in solvent, fluorine silicon tree is added into finely dispersed filler suspension
Rouge uses mechanical stirring 800rpm mixing 2h first, grinds 30min using blue-type mulling machine afterwards, can obtain coating composition A.
Before coating construction, component A is proportionally uniformly mixed with Bayer N3390, can be obtained coated in substrate surface drying at room temperature
The super-hydrophobic coating of resistance to water slug.
By the super-hydrophobic coating of resistance to water slug prepared by the formula, contact angle is 155.9 °, roll angle is 2.1 °.With glass
Glass substrate caking power wears 40 circulations on 400# sand paper and (is handed over anyhow respectively under the weight of 100g counterweight up to 1 grade
The abrasion for pitching 10cm is 1 circulation) contact angle is 155.3 °, roll angle is 4.2 ° afterwards.Diameter is the water droplet of 5mm apart from coating
The height of 80cm-120cm is dripped, and remains to walk in coating surface rolling easily.
Embodiment 2
1) silicon fluoride modified Nano concave convex rod is prepared
6 parts of deionized waters are mixed with 60 parts of dehydrated alcohols, the pH value with acetic acid adjustment mixed liquor is 4.6 parts are added to it
Perfluoro capryl triethoxysilane magnetic agitation 30 minutes, promotes silicon fluoride to be fully hydrolyzed.
20 parts of concave convex rods are added in 400 parts of dehydrated alcohols, and 6000rpm shearing dispersion 20min uses large power supersonic afterwards
Disperse 30min, again using 6000rpm shearing dispersion 20min.
By silicon fluoride hydrolyzate be added concave convex rod dispersion liquid in, 100 DEG C of -120 DEG C of back flow reactions for 24 hours, centrifugal drying
Silicon fluoride modified Nano concave convex rod, diameter 3-10nm can be obtained, length is 0.1-1 μm.
2) silicon fluoride modified Nano SiO is prepared2
6 parts of deionized waters are mixed with 60 parts of dehydrated alcohols, the pH value with acetic acid adjustment mixed liquor is 4.6 parts are added to it
Perfluoro capryl triethoxysilane magnetic agitation 30 minutes, promotes silicon fluoride to be fully hydrolyzed.
20 parts of partial sizes are 20nm Nano-meter SiO_22Be added in 400 parts of dehydrated alcohols, 6000rpm shearing dispersion 20min, after adopt
Disperse 30min with large power supersonic, again using 6000rpm shearing dispersion 20min.
By silicon fluoride hydrolyzate be added concave convex rod dispersion liquid in, 100 DEG C of -120 DEG C of back flow reactions for 24 hours, centrifugal drying
Silicon fluoride modified Nano SiO can be obtained2。
3) the super-hydrophobic coating of resistance to water slug is prepared
The super-hydrophobic coating of the resistance to water slug of the present embodiment, be formed by the coating room temperature curing of certain component, wherein
The parts by weight of each component in coating are as follows: 25 parts of fluorine silicon resin；4 parts of concave convex rod of perfluoro capryl triethoxysilane modified Nano；Entirely
Fluorine octyltri-ethoxysilane modified Nano SiO26 parts；22 parts of butyl acetate；11 parts of dimethylbenzene；4 parts of Bayer B3390.This reality
The super-hydrophobic coating production for applying the resistance to water slug in example is same as Example 1.
By the super-hydrophobic coating of resistance to water slug prepared by the formula, contact angle is 157.8 °, roll angle is 1.8 °.With glass
Glass substrate caking power wears 40 circulations on 400# sand paper and (is handed over anyhow respectively under the weight of 100g counterweight up to 1 grade
The abrasion for pitching 10cm is 1 circulation) contact angle is 157.2 °, roll angle is 3 ° afterwards.Diameter is the water droplet of 5mm apart from coating
The height of 110cm is dripped, and remains to walk in coating surface rolling easily.
Embodiment 3
1) silicon fluoride Modified Micron SiO is prepared2
6 parts of deionized waters are mixed with 30 parts of dehydrated alcohols, the pH value with acetic acid adjustment mixed liquor is 4.6 parts are added to it
Perfluoro capryl triethoxysilane magnetic agitation 30 minutes, promotes silicon fluoride to be fully hydrolyzed.
The SiO that 30 parts of partial sizes are 20 microns2Be added in 400 parts of dehydrated alcohols, 6000rpm shearing dispersion 20min, after adopt
Disperse 30min with large power supersonic, again using 6000rpm shearing dispersion 20min.
Micron SiO is added in silicon fluoride hydrolyzate2Dispersion liquid in, in 100 DEG C of -120 DEG C of back flow reaction 26h, centrifugation is dry
It is dry that silicon fluoride Modified Micron SiO can be obtained2。
2) silicon fluoride modified Nano SiO is prepared2
6 parts of deionized waters are mixed with 60 parts of dehydrated alcohols, the pH value with acetic acid adjustment mixed liquor is 4.6 parts are added to it
Perfluoro capryl triethoxysilane magnetic agitation 30 minutes, promotes silicon fluoride to be fully hydrolyzed.
The Nano-meter SiO_2 that 20 parts of partial sizes are 20nm2It is added in 400 parts of dehydrated alcohols, 6000rpm shearing dispersion 20min, after
30min is dispersed using large power supersonic, again using 6000rpm shearing dispersion 20min.
Nano-meter SiO_2 is added in silicon fluoride hydrolyzate2Dispersion liquid in, 100 DEG C of -120 DEG C of back flow reactions for 24 hours, centrifugation is dry
It is dry that silicon fluoride modified Nano SiO can be obtained2。
3) the super-hydrophobic coating of resistance to water slug is prepared
The super-hydrophobic coating of the resistance to water slug of the present embodiment, be formed by the coating room temperature curing of certain component, wherein
The parts by weight of each component in coating are as follows: 38 parts of fluorine silicon resin；Modified Micron SiO212 parts；Modified Nano SiO28 parts；Acetic acid fourth
28 parts of ester；10 parts of dimethylbenzene；4 parts of Bayer B3390.The super-hydrophobic coating of resistance to water slug in the present embodiment is by following step
Suddenly it is prepared: by Modified Micron SiO2With modified Nano SiO2It mixes, is added in organic solvent using big according to a certain percentage
Power ultrasonic disperse 80W carries out dispersion 30min, and fluorine silicon resin is added into finely dispersed filler suspension, uses machine first
Tool stirs 800rpm mixing 2h, grinds 30min using blue-type mulling machine afterwards, can obtain coating composition A.It, will before coating construction
Component A is proportionally uniformly mixed with Bayer N3390, can obtain the ultraphobic of resistance to water slug coated in substrate surface drying at room temperature
Water coating.
By the super-hydrophobic coating of resistance to water slug prepared by the formula, contact angle is 156.7 °, roll angle is 2.5 °.With glass
Glass substrate caking power wears 40 circulations on 400# sand paper and (is handed over anyhow respectively under the weight of 100g counterweight up to 0 grade
The abrasion for pitching 10cm is 1 circulation) contact angle is 156.2 °, roll angle is 3 ° afterwards.Diameter is the water droplet of 5mm apart from coating
The height of 100cm is dripped, and remains to walk in coating surface rolling easily.
Embodiment 4
1) silicon fluoride Modified Micron SiO is prepared2
6 parts of deionized waters are mixed with 60 parts of dehydrated alcohols, the pH value with acetic acid adjustment mixed liquor is 4.6 parts are added to it
Perfluoro capryl triethoxysilane magnetic agitation 30 minutes, promotes silicon fluoride to be fully hydrolyzed.
The SiO that 20 parts of partial sizes are 10 microns2Be added in 400 parts of dehydrated alcohols, 6000rpm shearing dispersion 20min, after adopt
Disperse 30min with large power supersonic, again using 6000rpm shearing dispersion 20min.
Modified Micron SiO is added in silicon fluoride hydrolyzate2Dispersion liquid in, in 100 DEG C of -120 DEG C of back flow reaction 26h, from
Silicon fluoride Modified Micron SiO can be obtained in heart drying2。
2) silicon fluoride modified Nano SiO is prepared2
6 parts of deionized waters are mixed with 60 parts of dehydrated alcohols, the pH value with acetic acid adjustment mixed liquor is 4.6 parts are added to it
Perfluoro capryl triethoxysilane magnetic agitation 30 minutes, promotes silicon fluoride to be fully hydrolyzed.
The Nano-meter SiO_2 that 20 parts of partial sizes are 60nm2It is added in 400 parts of dehydrated alcohols, 6000rpm shearing dispersion 20min, after
30min is dispersed using large power supersonic, again using 6000rpm shearing dispersion 20min.
Modified Nano SiO is added in silicon fluoride hydrolyzate2Dispersion liquid in, 100 DEG C of -120 DEG C of back flow reactions for 24 hours, from
Silicon fluoride modified Nano SiO can be obtained in heart drying2。
3) the super-hydrophobic coating of resistance to water slug is prepared
The super-hydrophobic coating of the resistance to water slug of the present embodiment, be formed by the coating room temperature curing of certain component, wherein
The parts by weight of each component in coating are as follows: 27 parts of fluorine silicon resin；Modified Micron SiO220 parts；Modified Nano SiO29 parts；Acetic acid fourth
30 parts of ester；10 parts of dimethylbenzene；4 parts of Bayer B3390.The super-hydrophobic coating of resistance to water slug in the present embodiment is by following step
Suddenly it is prepared: by Modified Micron SiO2With Nano-meter SiO_22It mixes, is added in organic solvent using high-power according to a certain percentage
Ultrasonic disperse 80W carries out dispersion 30min, and fluorine silicon resin is added into finely dispersed filler suspension, is stirred first using machinery
800rpm mixing 2h is mixed, 30min is ground using blue-type mulling machine afterwards, coating composition A can be obtained.Before coating construction, by component A
It is proportionally uniformly mixed with Bayer N3390, the super-hydrophobic that can obtain resistance to water slug coated in substrate surface drying at room temperature applies
Layer.
By the super-hydrophobic coating of resistance to water slug prepared by the formula, contact angle is 158.7 °, roll angle is 1.5 °.With glass
Glass substrate caking power wears 40 circulations on 400# sand paper and (is handed over anyhow respectively under the weight of 100g counterweight up to 0 grade
The abrasion for pitching 10cm is 1 circulation) contact angle is 157.7 °, roll angle is 2.4 ° afterwards.Diameter is the water droplet of 5mm apart from coating
The height of 120cm is dripped, and remains to walk in coating surface rolling easily.
Claims (10)
1. a kind of super-hydrophobic coating of resistance to water slug, including fluororesin, low-surface-energy filler 1, low-surface-energy filler 2 and isocyanic acid
Ester curing agent solidifies at room temperature；Wherein low-surface-energy filler 1 and low-surface-energy filler 2 are respectively nano bar-shape and nanometer
The combination of particle or low-surface-energy filler 1 and low-surface-energy filler 2 nano particle that be partial size different, low-surface-energy filler 1 with
The partial size ratio of low-surface-energy filler 2 is greater than 10.
2. a kind of super-hydrophobic coating of resistance to water slug as described in claim 1, characterized in that the fluororesin is room temperature curing
One or more of mixing of three fluorine-type FEVE resins, four fluorine-type FEVE resins, fluorine richness silicone resin, fluorin modified crylic acid resin
Object.
3. a kind of super-hydrophobic coating of resistance to water slug as described in claim 1, characterized in that
The low-surface-energy filler 1 is the modified nanofiller of silicon fluoride, and the nanofiller is concave convex rod, carbon fiber, and carbon is received
Mitron, the SiO that partial size is 0.5-20 μm2、Al2O3Or CaCO3, the mixture of one or more of above-mentioned raw materials；
The low-surface-energy filler 2 is the modified nanofiller of silicon fluoride, and the nanofiller is the SiO that partial size is 5-100nm2、
Al2O3、CaCO3One or more of mixture；
The silicon fluoride is the mixing of one or both of perfluoro capryl triethoxysilane, perfluoro decyl triethoxysilane
Object.
4. a kind of super-hydrophobic coating of resistance to water slug as claimed in claim 3, characterized in that the modified nanometer of the silicon fluoride
Filler is to be prepared by the following method: nanofiller is added in ethyl alcohol through shearing-ultrasound-shearing endless form point
It dissipates, the hydrolyzate of silicon fluoride is then added, wherein silicon fluoride and the mass ratio of nanofiller are 0.2-0.5:1；Then 100
DEG C -120 DEG C back flow reaction 22 hours or more, centrifugal drying obtains the modified nanofiller of silicon fluoride.
5. a kind of super-hydrophobic coating of resistance to water slug as claimed in claim 4, characterized in that the hydrolyzate of the silicon fluoride is
The pH value of deionized water and dehydrated alcohol is added as the hydrolyzate hydrolyzed in 3~5 mixed liquor in silicon fluoride.
6. a kind of super-hydrophobic coating of resistance to water slug as described in any one of claim 1-5, characterized in that be by following
The coating room temperature curing of component forms, wherein in coating each component parts by weight are as follows: 20-40 parts of fluororesin, low-surface-energy nanometer
3-40 parts of concave convex rod, low-surface-energy Nano-meter SiO_224-30 parts, 20-60 parts and isocyanate curing agent 2-7 parts of organic solvent.
7. a kind of super-hydrophobic coating of resistance to water slug as claimed in claim 6, characterized in that the fluororesin is fluorinated silicone modified
Resin；The low-surface-energy concave convex rod is that perfluoro capryl triethoxysilane or perfluoro decyl triethoxysilane are modified concave-convex
Stick, diameter 3-10nm, length are 0.1-1 μm；The low-surface-energy Nano-meter SiO_22For perfluoro capryl triethoxysilane or
Perfluoro decyl triethoxysilane is modified SiO2, partial size 20-100nm；The organic solvent is butyl acetate and dimethylbenzene
Mixed solvent, mass ratio are (1-3) ︰ 1；The isocyanate curing agent is HDI trimer.
8. a kind of super-hydrophobic coating of resistance to water slug as described in any one of claim 1-5, characterized in that be by following
The coating room temperature curing of component forms, wherein in coating each component parts by weight are as follows: 20-60 parts of fluororesin, the big grain of low-surface-energy
Diameter SiO25-20 parts, low-surface-energy small particle SiO25-20 parts, 20-60 parts of organic solvent, 2-7 parts of isocyanate curing agent.
9. a kind of super-hydrophobic coating of resistance to water slug as claimed in claim 8, characterized in that the fluororesin is modified fluoro-silicone
Resin；The big partial size SiO of low-surface-energy2It is modified for perfluoro capryl triethoxysilane or perfluoro decyl triethoxysilane
SiO2, partial size is 2-20 μm；The low-surface-energy small particle SiO2For three second of perfluoro capryl triethoxysilane or perfluoro decyl
Oxysilane is modified SiO2, partial size 20-100nm；The organic solvent is the mixed solvent of butyl acetate and dimethylbenzene, quality
Than for (1-3) ︰ 1；The isocyanate curing agent is HDI trimer.
10. a kind of preparation method of the super-hydrophobic coating of resistance to water slug as described in any one of claim 6-9, feature
It is to mix low-surface-energy filler 1 and low-surface-energy filler 2, is added in organic solvent and is carried out using large power supersonic dispersion
Disperse 30min-1h, fluororesin is added into finely dispersed filler suspension, 1h-2h is mixed using mechanical stirring first, after
30min-1h is ground using blue-type mulling machine, obtains coating composition A；Before coating construction, component A is pressed with isocyanate curing agent
It is uniformly mixed according to ratio, the super-hydrophobic coating of resistance to water slug can be obtained coated in substrate surface drying at room temperature.
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| CN111040609A (en) * | 2019-11-29 | 2020-04-21 | 中国科学院宁波材料技术与工程研究所 | Coating material for automobile coating film and preparation method thereof |
| CN114891442A (en) * | 2022-04-01 | 2022-08-12 | 哈尔滨工程大学 | Super-hydrophobic anti-drag coating and preparation method thereof |
| CN115806755A (en) * | 2022-11-16 | 2023-03-17 | 国网山东省电力公司电力科学研究院 | Super-hydrophobic coating designed based on compact accumulation theory and preparation method thereof |
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| CN104987520A (en) * | 2015-07-09 | 2015-10-21 | 北京航空航天大学 | Super-hydrophobic nanometer transparent coating and preparation method thereof |
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| CN103483890A (en) * | 2013-09-12 | 2014-01-01 | 西安交通大学 | Polymer ice-coating-preventing coating containing modified nano particles and preparing method thereof |
| CN104987520A (en) * | 2015-07-09 | 2015-10-21 | 北京航空航天大学 | Super-hydrophobic nanometer transparent coating and preparation method thereof |
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| CN115806755A (en) * | 2022-11-16 | 2023-03-17 | 国网山东省电力公司电力科学研究院 | Super-hydrophobic coating designed based on compact accumulation theory and preparation method thereof |
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