CN109575732A - A kind of self-cleaning nona Ti02-Si02/ fluorine-containing ester paint - Google Patents
A kind of self-cleaning nona Ti02-Si02/ fluorine-containing ester paint 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
- C09D133/16—Homopolymers or copolymers of esters containing halogen atoms
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
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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
- 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
- C09D5/1662—Synthetic film-forming substance
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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
- 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
- C09D5/1681—Antifouling coatings characterised by surface structure, e.g. for roughness effect giving superhydrophobic coatings or Lotus effect
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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Abstract
A kind of self-cleaning nona Ti02-Si02/ fluorine-containing ester paint is prepared for a kind of core-shell structure TiO with self-cleaning ability by semi-continuous seed emulsion polymerization method2‑SiO2/ CFBMH lotion.Wherein, DFMA and nano-TiO2‑SiO2: optimal additional amount be 15 wt.% and 0.3 wt.%.The result shows that: TiO2‑SiO2The hydrophobic performance of/CFBMH emulsion film is most strong, and CA value reaches 135, is not only because the surface that fluoro-containing group is mainly enriched in lotion shell, and due to nano-TiO2‑SiO2Doping, emulsion particle surface form coarse micro-nano structure actual self-cleaning surface test in, TiO2‑SiO2/ CFBMH shows excellent self-cleaning performance, has broad application prospects in exterior wall paint field.
Description
Technical field
The present invention relates to a kind of coating more particularly to a kind of self-cleaning nona Ti02-Si02/ fluorine-containing ester paint.
Background technique
With the improvement of living standards, requirement of the people to coating is higher and higher.Water paint has technologically advanced, technique
Cleaning, low energy consumption, low emission, it is safe and harmless the features such as, thus by the favor of people.In water paint, acrylic resin
Synthetic method is simple, at low cost, and has the characteristics that color is shallow, transparency is high, good to pigment wettability, be widely used as coating at
Film.But its polluting proofing property, weatherability, heat resistance, hydro-oleophobicity are poor, it would be highly desirable to solve.Fluorocarbon polymer surface can be low, has
Excellent polluting proofing property and hydro-oleophobicity.Has acrylate by the fluorinated acrylate polymer that emulsion polymerization synthesizes
The advantages of both polymer and fluorocarbon polymer, had both remained acrylate polymer good guarantor when making coating film forming matter with it
Light colour retention, adhesive force is strong, the bright characteristics such as plentiful, and has had both fluorocarbon polymer excellent weather resistance, polluting proofing property, hydrophobic dredged
The advantages that oiliness, acid-fast alkali-proof and radiation resistance.
Summary of the invention
The purpose of the invention is to improve coating self-cleaning performance, a kind of self-cleaning nona Ti0 is devised2-Si02/ contain
Perfluoroalkyl acrylate ester paint.
The technical solution adopted by the present invention to solve the technical problems is:
Self-cleaning nona Ti02-Si02The raw material for preparing of/fluorine-containing ester paint includes: BA； MMA； HpA；Dodecyl
Sodium sulphate (SDS)；DFMA；KPS；Rutile-type super-hydrophobic nano TiO2-SiO2。
Self-cleaning nona Ti02-Si02The preparation step of/fluorine-containing ester paint are as follows: poly- using semi-continuous seed lotion
Legal preparation DFMA/BA/MMA/HpA core-shell polymer emulsion (CFBMH).First by 13.35g (0.104mol) BA, 7.55 g
(0.0755mol) MMA and 5.268g (0.037mol) HpA is stirred in clean bis- beaker of 100mI, is obtained after mixing
Core pre-polymer mix；By a certain amount of DFMA (mono- 0.05mol of 0.O1), 6.68 g (0.05mol) BA, 3.776g
(0.038mol) MMA and 2.634 g HpA (0.0185mol) is uniformly mixed in another bis- beaker of 100ml, obtains shell pre-polymerization
Mixture.Then, core pre-polymer mix is added in the 250ml three-necked flask for fill 100g water and is stirred evenly, at room temperature by
It is added dropwise to 10ml, KPS aqueous solution (0.006g/mL) is warming up to 50 DEG C after being added dropwise, it is mixed that 1.2g Anionic-nonionic is added
After to be emulsified dose of of co-emulsifier (SDS:OP-10=1:2) is completely dissolved, 80 DEG C of reaction 2h are warming up to, obtain the seed of blue
Lotion then by shell pre-polymer mix and 40ml, KPS aqueous solution be slowly added dropwise into seed emulsion ((being added dropwise in 1 h),
2h is reacted at 80 DEG C to be terminated to adjust pH with ammonium hydroxide after is cooled to room temperature to be 7 to get to CFBMH lotion.In order to compare, with same
Method be prepared for CBMH lotion, the difference is that after seed emulsion is formed, DFMA. is free of in the shell pre-polymer mix of addition
By 0.05-0.25g nano-TiO2-SiO2It is added in 50mLCFBMH lotion, is dispersed in lotion by mechanical stirring, so
After be ultrasonically treated 20min, when being hardly visible inorganic particle in lotion stop dispersion to get arrive TiO2-SiO2/ CFBMH cream
Liquid.
Self-cleaning nona Ti02-Si02The detecting step of/fluorine-containing ester paint are as follows: FTIR spectrum FT-IR is adopted
It is obtained with 27 Fourier transformation infrared spectrometer of Tensor (Germany).Method for making sample: casting filming therapy (Film is used
Casting method), emulsion film is obtained on the glass plate of dried and clean, is placed in a vacuum drying oven at 60 DEG C and dries for 24 hours.
Water contact angle carries out test specific method using OCA-20 type interfacial rheometer (Germany): emulsion film (method for making sample is same as above)
5 μ L water droplets of upper dropwise addition, each sample take 5 positions to survey contact angle, are averaged as final result.The test of FNMR spectrogram exists
Method for making sample is completed on 600M Bruker AvanceIII HD nuclear magnetic resonance spectrometer (Germany): a small amount of lotion being taken to be placed in 50 ml, bis- beaker
In, proper amount of methanol demulsification is added, generates white flock precipitate, after isolating precipitating, with distilled water and ethyl alcohol washes clean repeatedly,
Dry 12 h are placed in a vacuum drying oven at 60 DEG C, pure polymer is obtained.The thermal stability of polymer uses STA449C type
Thermogravimetric analyzer (NETZSCH company) carries out.Analysis condition: under nitrogen atmosphere, heating rate is 10 0C/min, temperature elevating range
It is 25-600 DEG C.By atomic force microscope (AFM, Bruker MultiMo-e VIII, Germany) to the surface shape of emulsion film
Looks are observed, using contact mode (Contact mode).Method for making sample: a small amount of emulsion droplets are added on mica sheet,
After lotion is sprawled, drying and forming-film under room temperature.Zeta potential and grain diameter measurement using MalvernNanoZS90 Zeta potential and
Partial size tester (Britain) carries out, test method are as follows: after 2 ml, bis- lotion is diluted 100 times, is tested with Zeta potential tester
Its stability surveys the latex particle size of lotion with particle size analyzer.TEM image uses the transmission electron microscope (diary of JEM-2000 EX type
Record, setting operation voltage is 200 kV. method for making sample: drop is on copper mesh after 1 ml, bis- lotion distilled water is diluted 100 times, often
The lower drying of temperature.In order to investigate the self-cleaning ability of emulsion film, the plastic plate for being coated with two layers of imitation stone lacquer using surface is incited somebody to action as substrate
Prepared CBMH/CFBMH and TiO2-SiO2/ CFBMH lotion is coated uniformly on 3 identical substrate surfaces, dries at room temperature
24 h film forming.Model soil (flyash and loess are according to mass ratio 2:1 mixing) is uniformly sprinkled upon on 3 experimental plates, and is sprayed
A small amount of water makes dirt adherency on the surface, dry 24 h.Then, experiment plate surface (distance 20- is sprayed with 100 ml watering cans
30cm), nature rain drop erosion is simulated, each sample sprays 10 times.In order to compare, to clean surface, contaminated surface and spray
Surface afterwards photographs to record respectively.
The beneficial effects of the present invention are:
By semi-continuous seed emulsion polymerization method, it is prepared for a kind of core-shell structure TiO with self-cleaning ability2-SiO2 /
CFBMH lotion.Wherein, DFMA and nano-TiO2-SiO2: optimal additional amount be not 15 wt.% and 0.3 wt.%. the result shows that:
TiO2/SiO2The hydrophobic performance of/CFBMH emulsion film is most strong, and CA value reaches 135, and it is mainly rich to be not only because fluoro-containing group
Collect on the surface of lotion shell, and due to nano-TiO2-SiO2Doping, coarse micro-nano knot is formd on emulsion particle surface
Structure is in the test of actual self-cleaning surface, TiO2-SiO2/ CFBMH shows excellent self-cleaning performance, leads in exterior coating
Domain has broad application prospects.
Specific embodiment
Case study on implementation 1:
Relationship between the water contact angle and fluorine content of polymer emulsion film it may be clearly seen that, be not added with the CBMH of fluorochemical monomer
Water contact angle after emulsion film forming only has 680, has certain hydrophily after 5%DFMA is added, the contact of CFBMH emulsion film
Angle increases to 101, is changed into hydrophobicity by original hydrophily.This is because fluoro-containing group can priority migration in polymerization process
To emulsion particle surface lotion film surface is reduced.When DFMA content progressively increases to 10% and 15%, CFBMH emulsion film
Contact angle increases respectively to 106 and 113, illustrates that contact angle is gradually increased as fluorine content increases, hydrophobic performance significantly improves.
But when continuing growing fluorinated volume to 20%, hydrophobicity is improved slowly, and contact angle values are only 115.It is comprehensive consider cost and environment because
Element determines that the optimum addition of DFMA is 15%.
Case study on implementation 2:
TiO2-SiO2The CA of/CFBMH and different TiO2-SiO2Relationship between content is, it is apparent that with undoped with nanometer
TiO2-SiO2Fluorine-containing vinegar milk liquid film (CFBMH) compare, TiO2-SiO2The CA value of/CFBMH significantly increases.Work as TiO2-
SiO2When content is gradually increased to 0.2 and 0.3 wt.% by 0.1, the CA of emulsion film increases to 120 and 135, hydrophobic performance by 115
Significantly improving, this may be because of nano-TiO2-SiO2Excellent ultra-hydrophobicity itself, more main factor is TiO2-SiO2
Nanoparticle forms micro-nano coarse structure in film surface.However, when continuing growing TiO2-SiO2Content is to 0.4 and 0.5 wt.%
When, CA value is reduced to 123 and 114, and hydrophobic performance weakens, and this may be because of excessive TiO2-SiO2Nanoparticle is adsorbed on cream
Micelle surface and cause latex particle settle result.Therefore, TiO2-SiO2The hydrophobic performance of/CFBMH emulsion film, with TiO2-
SiO2The increase of content, which shows, first enhances the variation tendency weakened afterwards, nano-TiO2-SiO2Optimum amount be 0.3wt.%.
Case study on implementation 3:
The surface texture and roughness of emulsion film are analyzed and are characterized using AFM, and range of observation is 2 μm X2 μm.For CBMH lotion
The surface of film, 3D figure presents wide and flat hills feature, roughness R are 8.02nm, can from corresponding top view
To more regular plane.And there are a large amount of nanometer protrusions for CFBMH lotion film surface, it can be observed that a large amount of granular phases
Mutual independent nanometer protrusion, although its surface roughness R is only 6.15 nm, the C-F key of surface energy is enriched in shell table
Face forms close-packed arrays, and lotion surface is made to work as the super-hydrophobic TiO of doping to hydrophobic generation transformation from hydrophilic2-SiO2Nanoparticle
Afterwards, there are many dimplings in lotion film surface, illustrates to form micro-nano coarse structure in lotion film surface, asperity is significant
Increase, R is that this CA value measured with front of 10.1 nm. is consistent, for TiO2-SiO2/ CFBMH emulsion film, the CA measured
Value is 135, than undoped TiO2-SiO2The CA value of the CFBMH lotion film surface of nanoparticle is higher by 22, further confirms surface
The formation of micro-nano structure is to the hydrophobic important function of material surface.
Case study on implementation 4:
Using surface it is coated with the plastic plate of two layers of imitation stone lacquer as substrate, after 3 kinds of prepared emulsion film formings of uniform roller coating,
3 groups of photos when clean, after sprinkling self-control pollutant and after spray cleaning can be seen that uncontaminated preceding TiO2-SiO2/
CFBMH film surface shows bright gloss, this may be due to TiO2-SiO2Nanoparticle forms micro- in lotion film surface
Micro-nano structure produces stronger smooth reflex.The rainwater that nature is simulated using spray to the coating surface after pollution is rushed
Brush, detects its polluting proofing property and self-cleaning ability.As can be seen that not fluorine-containing CBMH emulsion film, due to having centainly hydrophilic
Property, surface contaminant remains more, color blackening；It is substantially clean to CFBMH lotion membrane contaminant after spray washing, but
Still a small amount of black print is remained；And TiO2-SiO2/ CFBMH lotion film surface remains after spraying almost without any pollutant,
It is sparkling clean, absolutely prove TiO2-SiO2/ CFBMH emulsion film has excellent self-cleaning ability.
Claims (4)
1. a kind of self-cleaning nona Ti02-Si02/ fluorine-containing ester paint, preparing raw material includes: BA； MMA； HpA；12
Sodium alkyl sulfate (SDS)；DFMA；KPS；Rutile-type super-hydrophobic nano TiO2-SiO2。
2. self-cleaning nona Ti0 according to claim 12-Si02/ fluorine-containing ester paint, it is characterized in that automatically cleaning is received
Rice Ti02-Si02The preparation step of/fluorine-containing ester paint are as follows: DFMA/BA/ is prepared using semi-continuous seed emulsion polymerization method
MMA/HpA core-shell polymer emulsion (CFBMH), first by 13.35g (0.104mol) BA, 7.55 g (0.0755mol) MMA and
5.268g (0.037mol) HpA is stirred in clean bis- beaker of 100mI, obtains core pre-polymer mix after mixing；By one
Quantitative DFMA (mono- 0.05mol of 0.O1), 6.68 g (0.05mol) BA, 3.776g (0.038mol) MMA and 2.634 g HpA
(0.0185mol) is uniformly mixed in another bis- beaker of 100ml, shell pre-polymer mix is obtained, then, by core pre-polymer mix
It is added in the 250ml three-necked flask for fill 100g water and stirs evenly, 10ml, KPS aqueous solution are added dropwise at room temperature
(0.006g/mL), is warming up to 50 DEG C after being added dropwise, be added 1.2g Anionic-nonionic blended emulsifier (SDS:OP-10=
1:2) to be emulsified dose of be completely dissolved after, be warming up to 80 DEG C of reaction 2h, obtain blue seed emulsion then shell pre-polymerization is mixed
Object and 40ml, KPS aqueous solution are slowly added dropwise into seed emulsion that ((being added dropwise in 1 h), it is cooling to terminate by reaction 2h at 80 DEG C
PH, which is adjusted, with ammonium hydroxide after to room temperature is prepared for CBMH lotion with same method to compare to get to CFBMH lotion for 7,
The difference is that after seed emulsion is formed, without DFMA. by 0.05-0.25g nanometers in the shell pre-polymer mix of addition
TiO2-SiO2It is added in 50mLCFBMH lotion, is dispersed in lotion by mechanical stirring, be then ultrasonically treated 20min,
Stop dispersion when being hardly visible inorganic particle in lotion to get TiO is arrived2-SiO2/ CFBMH lotion.
3. self-cleaning nona Ti0 according to claim 12-Si02/ fluorine-containing ester paint, it is characterized in that automatically cleaning is received
Rice Ti02-Si02The detecting step of/fluorine-containing ester paint are as follows: FTIR spectrum FT-IR uses 27 Fourier of Tensor
Leaf transformation infrared spectrometer (Germany) obtains, method for making sample: using casting filming therapy (Film casting method), dry
Emulsion film is obtained on the glass plate of dry cleaning, being placed in a vacuum drying oven drying at 60 DEG C, for 24 hours, water contact angle uses OCA-20 type
Interfacial rheometer (Germany) carries out test specific method: 5 μ L water droplets, each sample being added dropwise on emulsion film (method for making sample is same as above)
Product take 5 positions to survey contact angle, are averaged as final result, the test of FNMR spectrogram is in 600M Bruker
Method for making sample is completed on AvanceIII HD nuclear magnetic resonance spectrometer (Germany): a small amount of lotion being taken to be placed in 50 ml, bis- beaker, is added appropriate
Methanol demulsification, generates white flock precipitate, and after isolating precipitating, with distilled water and ethyl alcohol washes clean repeatedly, it is dry to be placed in vacuum
Dry 12 h at 60 DEG C in dry case, obtain pure polymer, and the thermal stability of polymer uses STA449C type thermogravimetric analyzer
(NETZSCH company) carries out, analysis condition: under nitrogen atmosphere, heating rate is 10 0C/min, temperature elevating range 25-600
DEG C, the surface topography of emulsion film is seen by atomic force microscope (AFM, Bruker MultiMo-e VIII, Germany)
It examines, using contact mode (Contact mode), method for making sample: a small amount of emulsion droplets are added on mica sheet, are spread to lotion
Zhan Hou, drying and forming-film under room temperature, Zeta potential and grain diameter measurement are tested using MalvernNanoZS90 Zeta potential and partial size
Instrument (Britain) carries out, test method are as follows: after 2 ml, bis- lotion is diluted 100 times, its stability is tested with Zeta potential tester,
The latex particle size of lotion is surveyed with particle size analyzer, TEM image is using JEM-2000 EX type transmission electron microscope (day entry, setting operation
Voltage is 200 kV. method for making sample: drop is dry under room temperature on copper mesh after 1 ml, bis- lotion distilled water is diluted 100 times,
In order to investigate the self-cleaning ability of emulsion film, the plastic plate of two layers of imitation stone lacquer is coated with as substrate using surface, it will be prepared
CBMH/CFBMH and TiO2-SiO2/ CFBMH lotion is coated uniformly on 3 identical substrate surfaces, at room temperature dry 24 h at
Model soil (flyash and loess are according to mass ratio 2:1 mixing) is uniformly sprinkled upon on 3 experimental plates, and sprays on a small quantity by film
Water makes dirt adherency on the surface, dry 24 h, then, sprays experiment plate surface (distance 20-30cm), mould with 100 ml watering cans
Quasi- nature rain drop erosion, each sample sprays 10 times, in order to compare, to the surface after clean surface, contaminated surface and spray
It photographs to record respectively.
4. self-cleaning nona Ti0 according to claim 12-Si02/ fluorine-containing ester paint, it is characterized in that by partly connecting
Continuous seed emulsion polymerization, is prepared for a kind of core-shell structure TiO with self-cleaning ability2-SiO2/ CFBMH lotion, wherein
DFMA and nano-TiO2-SiO2: optimal additional amount be not 15 wt.% and 0.3 wt.%. the result shows that: TiO2/SiO2 /
The hydrophobic performance of CFBMH emulsion film is most strong, and CA value reaches 135, is not only because fluoro-containing group and is mainly enriched in lotion shell
The surface of layer, and due to nano-TiO2-SiO2Doping, form coarse micro-nano structure actual on emulsion particle surface
In self-cleaning surface test, TiO2-SiO2/ CFBMH shows excellent self-cleaning performance, has in exterior wall paint field wide
Application prospect.
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Application publication date: 20190405 |