CN113122040A - Preparation method of multifunctional super-hydrophobic coating with mechanical stability - Google Patents
Preparation method of multifunctional super-hydrophobic coating with mechanical stability Download PDFInfo
- Publication number
- CN113122040A CN113122040A CN202110354412.5A CN202110354412A CN113122040A CN 113122040 A CN113122040 A CN 113122040A CN 202110354412 A CN202110354412 A CN 202110354412A CN 113122040 A CN113122040 A CN 113122040A
- Authority
- CN
- China
- Prior art keywords
- zinc oxide
- super
- hydrophobic coating
- hydrophobic
- mechanical stability
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
-
- 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
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- C—CHEMISTRY; METALLURGY
- 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
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plant Pathology (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a preparation method of a multifunctional super-hydrophobic coating with mechanical stability, belonging to the field of multifunctional application coatings. The method comprises the following steps: respectively dissolving zinc nitrate and potassium hydroxide in deionized water, slowly dropwise adding a zinc nitrate solution into a potassium hydroxide solution under magnetic stirring, transferring the obtained solution into a high-pressure kettle, reacting for 5 hours under mild conditions, centrifuging and drying to obtain zinc oxide with a special morphology, and performing hydrophobic modification on the zinc oxide particles obtained by the method by using tridecafluorooctyltriethoxysilane. Adding n-hexane, polydimethylsiloxane and absolute ethyl alcohol into a beaker according to a certain proportion, fully stirring, adding the modified zinc oxide into the mixed solution, carrying out ultrasonic treatment for half an hour, and finally spraying by using a spray gun to obtain the super-hydrophobic coating. The contact angle of the prepared super-hydrophobic coating reaches 157 degrees, the rolling angle is 4 degrees, and the prepared super-hydrophobic coating has good mechanical stability, photocatalysis and bacteriostasis capabilities.
Description
Technical Field
The invention belongs to the field of multifunctional application coatings, and particularly relates to a preparation method of a multifunctional super-hydrophobic coating with mechanical stability. The method for preparing the super-hydrophobic coating is simple and convenient, the cost is low, and the prepared super-hydrophobic coating has the advantages of bacteriostasis, photocatalysis, acid and alkali corrosion resistance and good mechanical stability.
Background
The super-hydrophobic coating has unique anti-wetting property, and the super-hydrophobic coating has the functions of anti-icing, anti-corrosion, resistance reduction, oil-water separation, antibiosis, self-cleaning and the like due to the unique anti-wetting property, so that the super-hydrophobic coating is widely applied to various fields. The anti-icing performance can be applied to the field of deicing to reduce the icing phenomenon of photovoltaic cells and power lines in winter. The corrosion and drag reduction properties are useful in marine applications, aircraft, and pipelines, among others. In addition, the super-hydrophobic screen can be used as an oil-water separator and is very practical in the petroleum industry and the treatment of oil-water pollution problems. To solve the problem that dust particles deposited on the surface of the solar cell may reduce the transparency of the solar cell cover glass, which leads to a reduction in the efficiency of the photovoltaic cell, a superhydrophobic surface having self-cleaning properties may remove contaminants on the surface of the glass. Because the unique anti-wetting property of the super-hydrophobic surface can keep the surface dry for a long time, the function of inhibiting the propagation of bacteria is achieved, and the bacteriostatic effect is achieved.
Although superhydrophobic coatings are extremely important in fundamental research in interfacial chemistry, physics, material science, interface structure design and other related disciplines, they have extremely broad application prospects in everyday life, building construction, communications and power systems, military equipment, aviation and navigation, and other fields. However, the anti-wetting property of the super-hydrophobic material may be reduced or even disappeared under severe environmental conditions such as high temperature, mechanical damage, chemical corrosion, strong ultraviolet irradiation, etc., so that the service life of the super-hydrophobic material is reduced. The super-hydrophobic material with excellent mechanical stability and durability is manufactured, and the key point for manufacturing the super-hydrophobic material is to prolong the service life of the super-hydrophobic material. The super-hydrophobic material can be manufactured by starting from the principle that super-hydrophobicity is damaged to prolong the service life of the super-hydrophobic material, a durable structure can be built by adding an abrasion-resistant material into the super-hydrophobic material, and the deformation resistance, the abrasion resistance and the mechanical damage resistance of the super-hydrophobic material are improved. The super-hydrophobic material with self-repairing ability can be designed, the super-hydrophobic ability can be regenerated through the self-adjusting ability of the material after the material is mechanically damaged, and therefore the super-hydrophobic material can be widely applied to social life and construction after being taken out of a laboratory.
Disclosure of Invention
The invention aims to solve the problem that an object exposed in the air and having a surface which is easily polluted loses the original function after being polluted and grows mold, thereby causing economic loss. The preparation method comprises the steps of firstly modifying zinc oxide particles by using an ethanol solution of tridecafluorooctyltriethoxysilane, uniformly mixing the modified zinc oxide particles with polydimethylsiloxane and normal hexane, preparing the multifunctional superhydrophobic antifouling coating with mechanical stability in a spraying mode, and uniformly dispersing the zinc oxide particles in the coating to form more micron/nanometer structures, so that the hydrophobicity of the coating is increased. And the existence of the zinc oxide particles greatly improves the mechanical stability and antifouling capacity of the coating, meanwhile, the zinc oxide particles are also a better photocatalyst, can degrade organic pollutants to carry out harmless treatment on the organic pollutants, and the zinc oxide is also a good bacteriostatic agent, can inhibit the growth of mould on the surface, keeps the cleanness of the coating and reduces the damage to human bodies caused by the growth of the mould.
The preparation method of the multifunctional super-hydrophobic coating with mechanical stability comprises the following steps:
1. mixing zinc nitrate and potassium hydroxide according to the proportion of 1: weighing appropriate amount of the zinc nitrate solution according to the molar ratio of 12 to 14, dissolving the zinc nitrate solution into 50 to 80ml of deionized water, slowly and dropwise adding the zinc nitrate solution into the potassium hydroxide solution under vigorous magnetic stirring, and continuously stirring the solution for half an hour under a magnetic stirrer. The resulting solution was then transferred to an autoclave and reacted for 5 hours under relatively mild conditions (80-100 ℃). Then centrifuging the obtained white solid zinc oxide by using deionized water and absolute ethyl alcohol twice, and drying the finally obtained zinc oxide in an oven at the temperature of 60-80 ℃ overnight;
2. the zinc oxide particles produced by the hydrothermal method described above are hydrophilic and therefore need to be modified to hydrophobic zinc oxide particles by the following method: 2 to 5g of zinc oxide prepared by the hydrothermal method described above are weighed into a beaker, and 50 to 100ml of anhydrous ethanol and then 0.5 to 1ml of tridecafluorooctyltriethoxysilane are added into the beaker. Stirring the beaker filled with the mixed solution on a magnetic stirrer for 4-6 hours, and then drying the zinc oxide modified by the tridecafluorooctyltriethoxysilane in an oven at 60-80 ℃ overnight to obtain modified ZnO particles with better hydrophobic property;
3. mixing zinc oxide and PDMS according to a certain mass ratio of 1: 1-3, firstly weighing PDMS (containing curing agent) and dissolving the PDMS in 50-80ml of n-hexane under magnetic stirring, then adding hydrophobic zinc oxide particles with equal mass modified by the method, and continuously stirring for 1-2 hours to form uniform mixed suspension. And uniformly spraying the prepared mixed suspension on a substrate with a superhydrophobic surface by using a spray gun. Finally, the sprayed substrate is placed in an oven at the temperature of 100 ℃ and 120 ℃ for curing for 1-3 hours to form the multifunctional ZnO/PDMS super-hydrophobic coating with mechanical stability.
Compared with the prior art, the invention has the following beneficial effects:
1. the zinc oxide particles adopted by the invention have simple preparation method and cluster-like appearance, and the zinc oxide is a better photocatalyst and bacteriostatic agent, so that the environment is not polluted;
2. according to the invention, the zinc oxide particles with the surfaces modified by tridecafluorooctyltriethoxysilane are used, and the zinc oxide particles with the surfaces modified have good dispersibility in the coating, can form more micro/nano structures, improves the hydrophobic property of the coating, and is beneficial to improving the mechanical stability, the bacteriostatic ability and the photocatalytic efficiency;
3. the super-hydrophobic material is coated on the surfaces of various base materials by spraying with a spray gun, and the preparation is not limited by the field, so that the dosage problem can be well mastered;
4. the preparation method of the multifunctional super-hydrophobic coating with mechanical stability provided by the invention can effectively resist the action of external force to keep better mechanical stability, and meanwhile, a layer of antibacterial film is formed on the surface by degrading toxic and harmful organic pollutants and better antibacterial performance by relying on the photocatalytic capacity of zinc oxide, so that the generation of mould is hindered, and the damage caused by the breeding of the mould is reduced.
Drawings
FIG. 1 is an SEM image of zinc oxide particles prepared according to the present invention;
FIG. 2 is a graph showing the contact angle of the present invention applied to a glass slide, filter paper and absorbent cotton.
Detailed Description
The first embodiment is as follows: the preparation method of the multifunctional super-hydrophobic coating with mechanical stability is carried out according to the following steps:
1. dissolving zinc nitrate and potassium hydroxide in deionized water, slowly dropwise adding a zinc nitrate solution into a potassium hydroxide solution, magnetically stirring for 30-60min, transferring the solution into a Teflon reaction kettle, reacting for four hours at 80-100 ℃, centrifuging the obtained white powder and drying;
2. adding 2-5g of the powder obtained in the step one into a mixed solution of absolute ethyl alcohol and tridecafluorooctyltriethoxysilane, magnetically stirring for four hours, and finally drying the modified zinc oxide particles for later use;
3. adding polydimethylsiloxane and normal hexane into a beaker according to a certain proportion, fully stirring, adding the modified zinc oxide into the mixed solution, ultrasonically dispersing for 30-50 minutes, and finally spraying by using a spray gun to obtain the super-hydrophobic coating.
The second embodiment is as follows: the first difference between the present embodiment and the specific embodiment is: and in the second step, the proportion of the mixed solution of the absolute ethyl alcohol and the tridecafluorooctyltriethoxysilane is controlled from 100: 1-2 to 150: 1-2. The rest is the same as the first embodiment.
The third concrete implementation mode: the present embodiment differs from the first or second embodiment in that: in the third step, the ratio of the zinc oxide to the polydimethylsiloxane is changed from 1: 1-3 to 2: 1-3, the others are the same as in the first or second embodiment.
The fourth concrete implementation mode: the difference between this embodiment mode and one of the first to third embodiment modes is: in the third step, the ratio of the zinc oxide to the polydimethylsiloxane is changed from 1: 1-3 is changed into 1: 2-4, the others being the same as in one of the first to third embodiments.
The effect of the invention is demonstrated by the following examples:
the method for verifying the mechanical stability and the oil-water separation of the multifunctional super-hydrophobic coating with the mechanical stability comprises the following steps:
1. the mechanical stability of the ZnO/PDMS multifunctional super-hydrophobic coating is researched, the abrasive paper is fixed on a horizontal stable plane by using a double-sided adhesive tape, the base material coated with one side of the super-hydrophobic coating is placed on the surface of the abrasive paper, in order to enable the super-hydrophobic surface to be in full contact with the abrasive paper, a weight of 200g is placed on the surface of the base material, then the base material is pushed along the horizontal direction at a constant speed, and after the base material is pushed for 10cm, the base material is pushed back to the initial position horizontally at a constant speed again in the opposite direction, and. The influence of abrasive paper abrasion on the super-hydrophobic surface is researched repeatedly for a plurality of periods, and the contact angle of the super-hydrophobic coating can still reach more than 150 degrees after a plurality of experiments;
2. the oil-water separation performance of the ZnO/PDMS multifunctional super-hydrophobic coating is researched, the absorbent cotton sprayed with the ZnO/PDMS super-hydrophobic coating is placed into a beaker mixed with oil and water by using tweezers, the edible oil floating on the water surface is quickly adsorbed by the absorbent cotton, and finally the adsorbed absorbent cotton is taken out by using the tweezers gently. The water surface hardly contains edible oil residue after adsorption, which shows that the prepared ZnO/PDMS super-hydrophobic absorbent cotton has better oil absorption property and provides a feasible scheme for solving oil pollution by oil-water separation.
Claims (4)
1. A preparation method of a multifunctional super-hydrophobic coating with mechanical stability comprises the following steps:
firstly, mixing zinc nitrate and potassium hydroxide according to the proportion of 1: weighing appropriate amount of zinc nitrate solution according to the molar ratio of 12-14, dissolving the zinc nitrate solution in 50-80mL of deionized water, slowly dripping the zinc nitrate solution into the potassium hydroxide solution under the condition of vigorous magnetic stirring, and continuously stirring the solution for half an hour under a magnetic stirrer; then transferring the obtained solution into an autoclave lined with Teflon, and reacting for 5 hours under a mild condition (80-100 ℃); then centrifuging the obtained white solid zinc oxide by using deionized water and absolute ethyl alcohol twice, and drying the finally obtained zinc oxide in an oven at the temperature of 60-80 ℃ overnight;
secondly, the zinc oxide particles produced by the hydrothermal method are hydrophilic, so that the zinc oxide particles need to be modified to be hydrophobic, and the method comprises the following steps: weighing 2-5g of zinc oxide prepared by the hydrothermal method, putting the zinc oxide into a beaker, adding 50-100mL of anhydrous ethanol into the beaker, and then adding 0.5-1mL of tridecafluorooctyltriethoxysilane; stirring the beaker filled with the mixed solution on a magnetic stirrer for 4-6 hours, and then drying the zinc oxide modified by the tridecafluorooctyltriethoxysilane in an oven at 60-100 ℃ overnight to obtain modified ZnO particles with better hydrophobic property;
thirdly, mixing zinc oxide and PDMS according to the mass ratio of 1: 1-3, firstly weighing PDMS (containing a curing agent) and dissolving the PDMS in 50-80mL of n-hexane under magnetic stirring, then adding hydrophobic zinc oxide particles with equal mass modified by the method, and continuously stirring for 1-2 hours to form uniform mixed suspension; and uniformly spraying the prepared mixed suspension on a substrate with a super-hydrophobic surface to be manufactured by using a spray gun, and finally, curing the sprayed substrate in an oven at the temperature of 100 ℃ and 120 ℃ for 1-3 hours or curing the substrate at room temperature for 12 hours to form the multifunctional super-hydrophobic coating with mechanical stability.
2. The method for preparing multifunctional super-hydrophobic coating with mechanical stability as claimed in claim 1, wherein in the first step, the molar ratio of zinc nitrate to potassium hydroxide is 1: 12-14.
3. The method for preparing the multifunctional super-hydrophobic coating with mechanical stability as claimed in claim 1, wherein in the second step, the volume ratio of the absolute ethyl alcohol to the tridecafluorooctyltriethoxysilane in the mixed solution is 100: 1-1.5.
4. The method for preparing multifunctional super-hydrophobic coating with mechanical stability as claimed in claim 1, wherein in step three, the ratio of polydimethylsiloxane to n-hexane is 1: 25, the ratio of zinc oxide to polydimethylsiloxane is 1: 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110354412.5A CN113122040A (en) | 2021-04-01 | 2021-04-01 | Preparation method of multifunctional super-hydrophobic coating with mechanical stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110354412.5A CN113122040A (en) | 2021-04-01 | 2021-04-01 | Preparation method of multifunctional super-hydrophobic coating with mechanical stability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113122040A true CN113122040A (en) | 2021-07-16 |
Family
ID=76774617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110354412.5A Pending CN113122040A (en) | 2021-04-01 | 2021-04-01 | Preparation method of multifunctional super-hydrophobic coating with mechanical stability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113122040A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115259284A (en) * | 2022-07-29 | 2022-11-01 | 北京交通大学 | Multifunctional membrane distillation membrane and preparation method and application thereof |
-
2021
- 2021-04-01 CN CN202110354412.5A patent/CN113122040A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115259284A (en) * | 2022-07-29 | 2022-11-01 | 北京交通大学 | Multifunctional membrane distillation membrane and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Moghadam et al. | Multifunctional superhydrophobic surfaces | |
| Nguyen-Tri et al. | Recent progress in the preparation, properties and applications of superhydrophobic nano-based coatings and surfaces: A review | |
| Bai et al. | Recent progresses of superhydrophobic coatings in different application fields: An overview | |
| Xiao et al. | Novel robust superhydrophobic coating with self-cleaning properties in air and oil based on rare earth metal oxide | |
| Li et al. | One-step spray-coating process for the fabrication of colorful superhydrophobic coatings with excellent corrosion resistance | |
| CN102241939B (en) | Organic-inorganic hybrid super-hydrophilic coating as well as preparation method and application thereof | |
| CN111534162B (en) | Montmorillonite-based photocatalytic super-hydrophobic coating and preparation method thereof | |
| CN111647290B (en) | Super-hydrophobic self-cleaning coating and preparation method thereof | |
| CN110183880B (en) | Photocatalytic super-amphiphobic coating and preparation method and application thereof | |
| CN110133763B (en) | Metal-based broadband antireflection self-cleaning bionic composite film and preparation and application thereof | |
| CN115074007B (en) | Inorganic-organic composite super-hydrophilic coating and preparation method and application thereof | |
| CN113122040A (en) | Preparation method of multifunctional super-hydrophobic coating with mechanical stability | |
| Kareem et al. | Base-catalyzed synthesis of superhydrophobic and antireflective films for enhanced photoelectronic applications | |
| CN110237844B (en) | Foamed nickel loaded with nano titanium dioxide and preparation method and application thereof | |
| Xi et al. | Ultrafine nano-TiO2 loaded on dendritic porous silica nanoparticles for robust transparent antifogging self-cleaning nanocoatings | |
| CN113152075B (en) | Wear-resistant anti-ultraviolet antistatic super-hydrophobic fabric and preparation method thereof | |
| CN114605896A (en) | High-transmittance self-cleaning coating suitable for surface of photovoltaic panel | |
| Niu et al. | A review of transparent superhydrophobic materials and their research in the field of photovoltaic dust removal | |
| Zheng et al. | Heating repairable superamphiphobic coatings for long-lasting antifouling application | |
| Yang et al. | A durable superhydrophilic self-cleaning coating based on TiO2–SiO2-PAA nanocomposite for photovoltaic applications: Long-term outdoor study | |
| WO2007091479A1 (en) | Method for protecting base | |
| CN109207042B (en) | preparation method of environment-purifying super-hydrophobic durable coating | |
| Ismail et al. | Self-cleaning coatings for minimizing the impact of dust precipitation on the power production of solar cells utilizing mesoporous TiO2/SiO2 and ZnO/SiO2 films | |
| CN201186898Y (en) | Anti-pollution decontaminating antibiotic nanoglass | |
| Zhang et al. | Photocatalytic antifouling coating based on carbon nitride with dynamic acrylate boron fluorinated polymers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication |