CN116179049B - Corrosion-resistant heat-insulating super-hydrophobic coating, and preparation method and application method thereof - Google Patents
Corrosion-resistant heat-insulating super-hydrophobic coating, and preparation method and application method thereof Download PDFInfo
- Publication number
- CN116179049B CN116179049B CN202310145650.4A CN202310145650A CN116179049B CN 116179049 B CN116179049 B CN 116179049B CN 202310145650 A CN202310145650 A CN 202310145650A CN 116179049 B CN116179049 B CN 116179049B
- Authority
- CN
- China
- Prior art keywords
- silica aerogel
- hydrophobic coating
- super
- aerogel
- corrosion
- 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.)
- Active
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 84
- 239000011248 coating agent Substances 0.000 title claims abstract description 73
- 230000003075 superhydrophobic effect Effects 0.000 title claims abstract description 65
- 238000005260 corrosion Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 230000007797 corrosion Effects 0.000 title abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 54
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 51
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 34
- 239000004965 Silica aerogel Substances 0.000 claims abstract description 33
- 239000004964 aerogel Substances 0.000 claims abstract description 33
- 238000009413 insulation Methods 0.000 claims abstract description 31
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000002904 solvent Substances 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 6
- 239000002086 nanomaterial Substances 0.000 claims abstract description 6
- 238000009210 therapy by ultrasound Methods 0.000 claims abstract description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 31
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 31
- 239000002041 carbon nanotube Substances 0.000 claims description 19
- 229910000077 silane Inorganic materials 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 16
- -1 silane modified silica aerogel Chemical class 0.000 claims description 16
- 239000003822 epoxy resin Substances 0.000 claims description 15
- 229920000647 polyepoxide Polymers 0.000 claims description 15
- 238000001354 calcination Methods 0.000 claims description 14
- 239000006185 dispersion Substances 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 12
- 239000008367 deionised water Substances 0.000 claims description 11
- 229910021641 deionized water Inorganic materials 0.000 claims description 11
- 239000000725 suspension Substances 0.000 claims description 10
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 9
- 238000001291 vacuum drying Methods 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 7
- 238000003828 vacuum filtration Methods 0.000 claims description 7
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000003760 magnetic stirring Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 3
- 229920000178 Acrylic resin Polymers 0.000 claims description 2
- 239000004925 Acrylic resin Substances 0.000 claims description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims description 2
- 229920005749 polyurethane resin Polymers 0.000 claims description 2
- 229920002379 silicone rubber Polymers 0.000 claims description 2
- 239000004945 silicone rubber Substances 0.000 claims description 2
- IIEWJVIFRVWJOD-UHFFFAOYSA-N ethyl cyclohexane Natural products CCC1CCCCC1 IIEWJVIFRVWJOD-UHFFFAOYSA-N 0.000 claims 1
- 238000004140 cleaning Methods 0.000 abstract description 4
- 238000004321 preservation Methods 0.000 abstract description 4
- 229920005989 resin Polymers 0.000 abstract description 4
- 239000011347 resin Substances 0.000 abstract description 4
- 239000010954 inorganic particle Substances 0.000 abstract description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 19
- 229910000831 Steel Inorganic materials 0.000 description 15
- 239000010959 steel Substances 0.000 description 15
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 9
- 238000005096 rolling process Methods 0.000 description 6
- 239000003973 paint Substances 0.000 description 5
- 239000011247 coating layer Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000010907 mechanical stirring Methods 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- 229910002808 Si–O–Si Inorganic materials 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 239000007783 nanoporous material Substances 0.000 description 1
- 230000003405 preventing effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- 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
- C09D5/08—Anti-corrosive paints
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention provides an anti-corrosion heat-insulating super-hydrophobic coating, a preparation method and a use method thereof, belonging to the field of coatings, wherein the anti-corrosion heat-insulating super-hydrophobic coating comprises the following raw materials in parts by weight: 25-200 parts of nano material, 20-120 parts of curing agent, 60-240 parts of film forming material and 3100-3200 parts of solvent; the nano material is a carbon nano tube-silicon dioxide aerogel hybrid. The preparation method comprises dispersing the carbon nanotube-silica aerogel hybrid in a solvent containing film-forming material, performing ultrasonic treatment, and adding the curing agent under stirring. The super-hydrophobic coating realizes heat insulation and corrosion resistance by utilizing the porosity of the silica aerogel; inorganic particles are combined with organic resin, so that the coating has certain mechanical property and self-cleaning property, and the heat preservation property of the coating is more stable.
Description
Technical Field
The invention belongs to the field of coatings, and particularly relates to an anti-corrosion heat-insulation super-hydrophobic coating; in addition, the invention also relates to a preparation method of the anti-corrosion heat-insulation super-hydrophobic coating; in addition, the invention also relates to a using method of the anti-corrosion heat-insulation super-hydrophobic coating.
Background
The existing steel structure building has two major hidden troubles in the application process: fire and corrosion. Effective protection is necessary because of the low fire resistance and the susceptibility to corrosion of steel structure buildings, which can lead to significant casualties and significant economic losses in service.
At present, protection by adopting building exterior paint is the most economical and effective protection method. However, the fireproof performance and the anticorrosive performance of the steel structure are treated independently, namely, the anticorrosive paint and the fireproof paint are used simultaneously, and the separate use of the anticorrosive paint and the fireproof paint can cause great waste and have great influence on the performance of the coating. In addition, these functionalized coatings generally suffer from poor adhesion, unstable quality, poor durability, etc., resulting in a limited range of applications for the coatings.
Silica aerogel is favored by many researchers as one of the materials having the best heat insulating properties so far, as well as having corrosion preventing properties. In carrying out the invention, however, the inventors have found that: the silica aerogel is used as an amorphous nano porous material, and has a complex structure, so that the silica aerogel has poor mechanical properties, is extremely fragile and is easy to damage, and the heat insulation performance is unstable.
Disclosure of Invention
Based on the background problems, the invention aims to provide an anti-corrosion heat-insulating super-hydrophobic coating, which comprises a carbon nano tube-silica aerogel hybrid, and realizes heat insulation and anti-corrosion performance by utilizing the porosity of the silica aerogel; and inorganic particles are combined with organic resin, so that the coating has certain mechanical property and self-cleaning property, and the heat preservation performance of the coating is more stable; the invention further aims at providing a preparation method and a use method of the anti-corrosion heat-insulating super-hydrophobic coating.
In order to achieve the above object, on the one hand, the technical scheme provided by the embodiment of the invention is as follows:
the anti-corrosion heat-insulation super-hydrophobic coating comprises the following raw materials in parts by weight:
25-200 parts of nano material, 20-120 parts of curing agent, 60-240 parts of film forming material and 3100-3200 parts of solvent;
the nano material is a carbon nano tube-silicon dioxide aerogel hybrid; the film forming material is one or more of epoxy resin, acrylic resin, polyurethane resin and silicone rubber.
In one embodiment, the carbon nanotube-silica aerogel hybrid has a particle size of 50-70nm.
In one embodiment, the solvent is one or more of acetone, ethanol, ethyl acetate, cyclohexane.
On the other hand, the embodiment of the invention provides a preparation method of an anti-corrosion heat-insulation super-hydrophobic coating, which is characterized in that a carbon nano tube-silicon dioxide aerogel hybrid is dispersed in a solvent containing a film-forming material for ultrasonic treatment, and then the curing agent is added under stirring.
In one embodiment, the preparation of the carbon nanotube-silica aerogel hybrid comprises the steps of:
calcining the silica aerogel powder to form hydroxylated silica aerogel;
adding the hydroxylated silica aerogel into ethanol for ultrasonic dispersion to form an aerogel solution, then adjusting the pH value of the aerogel solution to 3-4, then adding a silane coupling agent, magnetically stirring for 5-8h at 50-70 ℃, and finally performing vacuum filtration, washing and vacuum drying to obtain silane modified silica aerogel;
adding the silane modified silica aerogel dispersion liquid into the carbon nano tube suspension liquid, performing magnetic stirring for 48-96 hours after ultrasonic dispersion at room temperature, and performing vacuum filtration, washing and vacuum drying to obtain the carbon nano tube-silica aerogel hybrid.
Further, the calcination temperature of the silica aerogel powder is 400-600 ℃, the calcination time is 2-5h, and the temperature rising rate is 5 ℃/min during calcination.
Further, the concentration of the hydroxylated silica aerogel in the aerogel solution is 0.01 to 0.04g/mL.
Further, the silane modified silica aerogel dispersion is prepared from silane modified silica aerogel and ethanol, and the concentration is 0.05-0.1g/mL.
Further, the carbon nanotube suspension is prepared from aminated carbon nanotubes and deionized water, and the concentration is 0.005-0.01g/mL.
In a third aspect, the embodiment of the invention provides a method for using the anti-corrosion heat-insulation super-hydrophobic coating, wherein the super-hydrophobic coating solution is continuously sprayed at 25-35cm above an object to be coated for 20-40s under the pressure of 0.4-0.8Mpa, and then is cured for 20-30h at the temperature of 60-100 ℃.
Compared with the prior art, the embodiment of the invention has at least the following effects:
the super-hydrophobic coating comprises a carbon nano tube-silicon dioxide aerogel hybrid, wherein the carbon nano tube-silicon dioxide aerogel hybrid is formed by grafting silicon dioxide aerogel modified by silane onto a carbon nano tube, and the silicon dioxide aerogel has a three-dimensional porous network structure, and the internal volume of the silicon dioxide aerogel is 99% formed by gas, so that the super-hydrophobic coating has very good heat insulation and corrosion resistance effects; the carbon nano tube is used as a carrier, and the inorganic particles are combined with the organic resin, so that the coating has certain mechanical property and self-cleaning property, and the heat insulation property of the coating is more stable.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the description of the embodiments will be briefly described below.
FIG. 1 is a diagram of SiO in example 2 of the present invention 2 gel、SiO 2 gel-KH560、CNTs、CNTs-SiO 2 Infrared spectrogram of gel;
FIG. 2 is a Nyquist plot for 1-7 days in example 4 of the present invention;
FIG. 3 is a graph of the frequency of Bode|Z| for 1-7 days in example 4 of the present invention;
FIG. 4 is a Tafel plot of example 4 of the present invention;
FIG. 5 is a graph showing the frequency of 1-7 days in example 4 of the present invention;
FIG. 6 is a schematic diagram of an insulation can for thermal insulation performance detection according to an embodiment of the present invention;
fig. 7 is a graph showing the thermal insulation performance test of the superhydrophobic coating formed in example 4 of the invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to solve the problem that the heat preservation performance of the coating is unstable due to poor mechanical performance of the existing silica aerogel coating, the embodiment of the invention provides an anti-corrosion heat-insulation super-hydrophobic coating, which comprises a carbon nano tube-silica aerogel hybrid, wherein the silica aerogel has a three-dimensional porous network structure, and the inner volume of the silica aerogel is 99% of that of the silica aerogel is formed by gas, so that the silica aerogel has very good heat insulation and anti-corrosion effects; and the carbon nano tube is used as a carrier, and the electrodeless particles are combined with the organic resin, so that the coating has certain mechanical property and self-cleaning property, and the heat preservation performance of the coating is more stable.
The technical scheme of the invention will be described through specific embodiments.
Example 1
The anti-corrosion heat-insulation super-hydrophobic coating comprises the following raw materials: 0.25g of carbon nano tube-silicon dioxide aerogel hybrid, 0.2g of D230, 0.6g of epoxy resin and 31g of acetone.
The preparation method of the anti-corrosion heat-insulation super-hydrophobic coating comprises the following steps:
(1) Preparation of carbon nanotube-silica aerogel hybrid: silica aerogel powder (SiO 2 gel) is calcined at 400 ℃ for 5 hours, the temperature rising rate in the calcining process is controlled to be 5 ℃/min, and the hydroxylated silica aerogel (SiO) is formed after the calcining 2 gel-OH)；
1g of SiO 2 Adding gel-OH into 100mL of ethanol for ultrasonic dispersion for 30min to form aerogel solution, then adjusting the pH of the aerogel solution to 3-4 by using acetic acid, then adding 1.5mL of silane coupling agent KH560, magnetically stirring for 8h at 50 ℃ in water bath, vacuum filtering, washing with deionized water for 2 times, washing with ethanol for 2 times, and vacuum drying to obtain silane modified silica aerogel (SiO) 2 gel-KH560)；
5g of SiO 2 gel-KH560 and 100mL ethanol to prepare silane modified bisMixing 5g of aminated carbon nano tube and 1000mL of deionized water, stirring for 24 hours to form a carbon nano tube suspension dispersion, adding the silane modified silicon dioxide aerogel dispersion into the carbon nano tube suspension, performing ultrasonic dispersion at room temperature for 2 hours, performing magnetic stirring for 48 hours, performing vacuum filtration, washing with deionized water, and performing vacuum drying at 60 ℃ for 24 hours to obtain a carbon nano tube-silicon dioxide aerogel hybrid (CNTs-SiO) 2 gel)。
(2) Preparation of the super-hydrophobic coating: 0.25g CNTs-SiO 2 gel was dispersed in 39mL of acetone containing 0.6g of epoxy resin, sonicated for 45min, and then 0.2g of D230 was added with mechanical stirring.
Example 2
Unlike example 1, the preparation process of the carbon nanotube-silica aerogel hybrid in this example is as follows:
silica aerogel powder (SiO 2 gel) is calcined at 500 ℃ for 3 hours, the temperature rising rate in the calcining process is controlled to be 5 ℃/min, and the hydroxylated silica aerogel (SiO) is formed after the calcining 2 gel-OH)；
1g of SiO 2 Adding gel-OH into 50mL of ethanol for ultrasonic dispersion for 30min to form aerogel solution, then adjusting the pH of the aerogel solution to 3-4 by using acetic acid, then adding 2.5mL of silane coupling agent KH560, magnetically stirring for 6h at the water bath of 60 ℃, vacuum filtering, washing with deionized water for 2 times, washing with ethanol for 2 times, and vacuum drying to obtain silane modified silica aerogel (SiO) 2 gel-KH560)；
6g of SiO 2 gel-KH560 and 100mL ethanol are mixed to prepare a silane modified silica aerogel dispersion, 6g of aminated carbon nanotubes and 1000mL deionized water are mixed and stirred for 24 hours to form a carbon nanotube suspension dispersion, then the silane modified silica aerogel dispersion is added into the carbon nanotube suspension, and is subjected to magnetic stirring for 72 hours after being dispersed for 2 hours at room temperature in an ultrasonic manner, and then the mixture is subjected to vacuum filtration and washing with deionized water, and then the mixture is dried for 24 hours at 60 ℃ in a vacuum manner to obtain the carbon nanotube-silica aerogel hybrid (CNTs-SiO) 2 gel)。
For SiO 2 gel、SiO 2 gel-KH560、CNTs、CNTs-SiO 2 gel was subjected to infrared testing, the infrared spectrum of which is shown in FIG. 1, and it can be seen from FIG. 1: siO (SiO) 2 gel at 1080cm -1 And 800cm -1 The peak values at the positions are a symmetrical stretching vibration peak and an asymmetrical stretching vibration peak of Si-O-Si bonds respectively; siO (SiO) 2 gel-KH560 at 1270cm -1 1130cm -1 The newly appeared peaks are the C-C and C-O bonds carried by KH560, which proves that the SiO was successfully modified by KH560 2 gel; compared with the infrared spectrogram of CNTs, CNTs-SiO 2 gel at 1083cm -1 787cm -1 Two vibration peaks of Si-O-Si bond appear at 2854cm -1 The occurrence of the peak in the spectrum of the C-N bond signature verifies the success of the grafting reaction.
Example 3
Unlike example 1, the preparation process of the carbon nanotube-silica aerogel hybrid in this example is as follows:
silica aerogel powder (SiO 2 gel) is calcined at 700 ℃ for 2 hours, the temperature rising rate in the calcining process is controlled to be 5 ℃/min, and the hydroxylated silica aerogel (SiO) is formed after the calcining 2 gel-OH)；
1g of SiO 2 Adding gel-OH into 25mL of ethanol for ultrasonic dispersion for 30min to form aerogel solution, then adjusting the pH of the aerogel solution to 3-4 by using acetic acid, then adding 3mL of silane coupling agent KH560, magnetically stirring for 5h at 70 ℃ in water bath, vacuum filtering, washing 2 times by using deionized water, washing 2 times by using ethanol, and vacuum drying to obtain silane modified silica aerogel (SiO) 2 gel-KH560)；
10g of SiO 2 gel-KH560 and 100mL ethanol are mixed to prepare a silane modified silica aerogel dispersion, 10g of aminated carbon nanotubes and 1000mL deionized water are mixed and stirred for 24 hours to form a carbon nanotube suspension dispersion, then the silane modified silica aerogel dispersion is added into the carbon nanotube suspension, and after ultrasonic dispersion for 2 hours at room temperature, magnetic stirring is carried out for 96 hours, and then vacuum filtration and ion removal are carried outWashing with water, and vacuum drying at 60deg.C for 24 hr to obtain carbon nanotube-silica aerogel hybrid (CNTs-SiO) 2 gel)。
Example 4
The anti-corrosion heat-insulation super-hydrophobic coating comprises the following raw materials: 0.75g of carbon nano tube-silicon dioxide aerogel hybrid, 0.625g of D230, 1.875g of epoxy resin and 31.596g of acetone.
The preparation method of the anti-corrosion heat-insulation super-hydrophobic coating comprises the following steps:
0.75g CNTs-SiO 2 gel was dispersed in 40mL of acetone containing 1.875g of epoxy resin, sonicated for 45min, and then 0.625g of D230 was added with mechanical stirring.
The carbon nanotube-silica aerogel hybrid of this example was prepared by the method of example 2.
Example 5
The anti-corrosion heat-insulation super-hydrophobic coating comprises the following raw materials: 0.9g of carbon nano tube-silicon dioxide aerogel hybrid, 2300.625g of D, 1.2g of epoxy resin and 31.596g of acetone.
The method for preparing the anti-corrosion heat-insulating super-hydrophobic coating of the embodiment is the same as that of the embodiment 4.
Example 6
The anti-corrosion heat-insulation super-hydrophobic coating comprises the following raw materials: 1g of carbon nano tube-silicon dioxide aerogel hybrid, 2300.5g of D, 1.5g of epoxy resin and 31.596g of acetone.
The method for preparing the anti-corrosion heat-insulating super-hydrophobic coating of the embodiment is the same as that of the embodiment 4.
Example 7
The anti-corrosion heat-insulation super-hydrophobic coating comprises the following raw materials: 1.4g of carbon nano tube-silicon dioxide aerogel hybrid, 2300.6g of D, 1.8g of epoxy resin and 31.596g of acetone.
The method for preparing the anti-corrosion heat-insulating super-hydrophobic coating of the embodiment is the same as that of the embodiment 4.
Example 8
The anti-corrosion heat-insulation super-hydrophobic coating comprises the following raw materials: 1.8g of carbon nano tube-silicon dioxide aerogel hybrid, 2300.7g of D, 2.1g of epoxy resin and 31.596g of acetone.
The method for preparing the anti-corrosion heat-insulating super-hydrophobic coating of the embodiment is the same as that of the embodiment 4.
Example 9
The anti-corrosion heat-insulation super-hydrophobic coating comprises the following raw materials: 2g of carbon nano tube-silicon dioxide aerogel hybrid, 2300.8g of D, 2.4g of epoxy resin and 31.596g of acetone.
The method for preparing the anti-corrosion heat-insulating super-hydrophobic coating of the embodiment is the same as that of the embodiment 4.
Example 10
The anti-corrosion heat-insulation super-hydrophobic coating comprises the following raw materials: 2g of carbon nano tube-silicon dioxide aerogel hybrid, 1.2g of D2301.2g of epoxy resin, 2.4g of acetone and 32g of acetone.
The method for preparing the anti-corrosion heat-insulating super-hydrophobic coating of the embodiment is the same as that of the embodiment 4.
Comparative example
The super-hydrophobic coating comprises the following raw materials: 0.25g of carbon nano tube and SiO 2 0.5g, D230.625 g, epoxy resin 1.875g, acetone 31.596g.
The preparation method of the super-hydrophobic coating comprises the following steps:
carbon nanotubes and SiO 2 Dispersing in acetone, mechanically stirring for 1 hr, ultrasonic treating for 45min, and adding epoxy resin and D230 under mechanical stirring.
The performance of the superhydrophobic coating was next tested:
(1) Superhydrophobic performance: the superhydrophobic coating solutions of examples 4-9 were continuously sprayed at a pressure of 0.5Mpa over a steel plate for 30s, and then cured at 80 ℃ for 24 hours to form a superhydrophobic coating, and then contact angles and rolling angles of the formed superhydrophobic coatings were tested.
Specifically, a Contact Angle (CA) and a rolling angle (SA) of a sample were measured by using a contact angle measuring instrument (DSA 20 type, kruss company, germany), a minute amount of water was dropped onto the surface of the sample, the contact angle was measured by the contact angle measuring instrument, the rolling angle was passed through a rotary table, the angle displayed when the water drop was rolled down was observed, the volume of deionized water used was 10. Mu.L, and the values of the contact angle and the rolling angle were averaged by 5 measurements at different positions of the sample.
The test results are shown in Table 1.
TABLE 1 contact and Rolling angles of superhydrophobic coatings formed from superhydrophobic coatings in examples 4-9
As can be seen from table 1, the contact angles of the coatings formed in examples 4-9 are all greater than 90 °, indicating that the coatings formed are hydrophobic coatings, and the contact angles of the coatings formed in examples 4-8 are all greater than 150 °, with superhydrophobicity; similarly, the coating layers formed in examples 4 to 8 were super-hydrophobic as can be seen from the rolling angle data.
In addition, as can be seen from comparative examples 4 to 9, as the addition amount of the carbon nanotube-silica aerogel hybrid increases, the hydrophobic property of the formed coating tends to decrease because the coarse structure of the superhydrophobic surface is affected when the hybrid is added in a large amount, the epoxy resin cannot completely coat the nanoparticles, and thus the hydrophobicity and abrasion resistance of the coating are directly reduced.
(2) Corrosion resistance: electrochemical impedance tests are carried out on the steel plate sprayed with the super-hydrophobic coating in the embodiment 4, specifically, a blank steel plate and the steel plate sprayed with the super-hydrophobic coating in the embodiment 4 are soaked in 3.5wt% NaCl solution to obtain an electrokinetic polarization curve shown in the graph 2, and electrokinetic polarization parameters fitted by the electrokinetic polarization curve shown in the graph 2 are shown in a table 1; wherein the corrosion inhibition efficiency (. Eta.p) is calculated by the formula (I).
And i corr Respectively blank steel plate and sprayCorrosion current density of steel sheet coated with superhydrophobic coating.
The Nyquist plot for the steel plates coated with the superhydrophobic coating of example 4 for 1-7 days is shown in FIG. 3, the Bode|Z|frequency plot is shown in FIG. 4, and the frequency plot is shown in FIG. 5.
TABLE 1 Corrosion protection Properties of Steel sheet sprayed with the superhydrophobic coating of EXAMPLE 4
As can be seen from table 1, the corrosion current density of the steel plate sprayed with the superhydrophobic coating in the embodiment 4 is about three orders of magnitude lower than that of the blank steel plate, and the corrosion potential is higher than that of the blank steel plate, so that the superhydrophobic coating provided by the invention has a better anti-corrosion effect.
As can be seen from fig. 3, the resistance arc of the superhydrophobic coating layer is maximized and then gradually reduced at 1 day, but even after soaking for 7 days, the resistance arc radius exhibited by the coating layer is still larger than that of the blank steel plate itself, and the larger resistance arc radius exhibits better corrosion resistance, thereby indicating that the superhydrophobic coating layer of the present invention has corrosion resistance.
(3) Thermal insulation performance test: the self-made heat insulation performance detection incubator shown in fig. 6 is characterized in that a xenon lamp is vertically placed at a position 30cm away from the upper side of the incubator as a light source, the incubator body is a foam insulation board, a window is formed right below the light source, a glass plate coated with the coating in the embodiment 4 is placed at the window, and the coating is upward; the incubator temperature was recorded using a thermocouple every 5 minutes for a test time of 40 minutes.
As shown in fig. 7, it can be seen from fig. 7 that after heating for 40 minutes, the temperature in the box gradually tended to be stable, at which time the temperature of the box covered with the superhydrophobic coating in the comparative example was lower than that of the blank panel by 5.6 ℃, while the temperature of the box covered with the superhydrophobic coating formed in example 4 was lower than that of the blank panel by 12 ℃, which illustrates that the superhydrophobic coating formed by the carbon nanotube-silica aerogel hybrid of the present invention is better in heat insulation performance and thus has a wider application range than the coating formed by directly mixing the carbon nanotube with silica.
It should be noted that modifications and improvements can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the present invention.
Claims (6)
1. The anti-corrosion heat-insulation super-hydrophobic coating is characterized by comprising the following raw materials in parts by weight:
25-200 parts of nano material, 20-120 parts of curing agent, 60-240 parts of film forming material and 3100-3200 parts of solvent;
the nano material is a carbon nano tube-silicon dioxide aerogel hybrid; the film forming material is one or more of epoxy resin, acrylic resin, polyurethane resin and silicone rubber; the particle size of the carbon nano tube-silicon dioxide aerogel hybrid is 50-70nm;
the preparation of the carbon nano tube-silicon dioxide aerogel hybrid comprises the following steps:
calcining the silica aerogel powder to form hydroxylated silica aerogel;
adding the hydroxylated silica aerogel into ethanol for ultrasonic dispersion to form an aerogel solution, then adjusting the pH value of the aerogel solution to 3-4, then adding a silane coupling agent, magnetically stirring for 5-8h at 50-70 ℃, and finally performing vacuum filtration, washing and vacuum drying to obtain silane modified silica aerogel;
preparing silane modified silica aerogel and ethanol to form silane modified silica aerogel dispersion liquid with the concentration of 0.05-0.1g/mL;
adding the silane modified silica aerogel dispersion liquid into the carbon nano tube suspension liquid, performing magnetic stirring for 48-96 hours after ultrasonic dispersion at room temperature, and performing vacuum filtration, washing and vacuum drying to obtain a carbon nano tube-silica aerogel hybrid;
the carbon nanotube suspension is prepared from aminated carbon nanotubes and deionized water, and the concentration is 0.005-0.01g/mL.
2. The anti-corrosion heat-insulating super-hydrophobic coating according to claim 1, wherein the solvent is one or more of acetone, ethanol, ethyl acetate and cyclohexane.
3. The anti-corrosion and heat-insulating super-hydrophobic coating according to claim 1, wherein the carbon nanotube-silica aerogel hybrid is dispersed in a solvent containing a film-forming material for ultrasonic treatment, and then the curing agent is added under stirring.
4. The anti-corrosion heat-insulating super-hydrophobic coating according to claim 1, wherein the calcination temperature of the silica aerogel powder is 400-600 ℃, the calcination time is 2-5h, and the temperature rise rate is controlled to be 5 ℃/min during calcination.
5. The anti-corrosion and heat-insulating superhydrophobic coating according to claim 1, wherein the concentration of the hydroxylated silica aerogel in the aerogel solution is 0.01-0.04g/mL.
6. The method for using the anti-corrosion heat-insulating super-hydrophobic coating according to any one of claims 1 to 5, wherein the super-hydrophobic coating solution is sprayed for 20 to 40 seconds at a position 25 to 35cm above the object to be coated under a pressure of 0.4 to 0.8Mpa, and then cured for 20 to 30 hours at a temperature of 60 ℃ to 100 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310145650.4A CN116179049B (en) | 2023-02-22 | 2023-02-22 | Corrosion-resistant heat-insulating super-hydrophobic coating, and preparation method and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310145650.4A CN116179049B (en) | 2023-02-22 | 2023-02-22 | Corrosion-resistant heat-insulating super-hydrophobic coating, and preparation method and application method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116179049A CN116179049A (en) | 2023-05-30 |
| CN116179049B true CN116179049B (en) | 2023-12-01 |
Family
ID=86450259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310145650.4A Active CN116179049B (en) | 2023-02-22 | 2023-02-22 | Corrosion-resistant heat-insulating super-hydrophobic coating, and preparation method and application method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116179049B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113088160A (en) * | 2021-03-30 | 2021-07-09 | 北京科技大学 | Super-hydrophobic coating with wear resistance and preparation method thereof |
| CN113913087A (en) * | 2021-11-22 | 2022-01-11 | 江苏理工学院 | Preparation method of normal-temperature cured wear-resistant anticorrosion super-hydrophobic coating |
-
2023
- 2023-02-22 CN CN202310145650.4A patent/CN116179049B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113088160A (en) * | 2021-03-30 | 2021-07-09 | 北京科技大学 | Super-hydrophobic coating with wear resistance and preparation method thereof |
| CN113913087A (en) * | 2021-11-22 | 2022-01-11 | 江苏理工学院 | Preparation method of normal-temperature cured wear-resistant anticorrosion super-hydrophobic coating |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116179049A (en) | 2023-05-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wang et al. | Dopamine modified metal-organic frameworks on anti-corrosion properties of waterborne epoxy coatings | |
| CN111534162B (en) | Montmorillonite-based photocatalytic super-hydrophobic coating and preparation method thereof | |
| CN108383487B (en) | PAN pre-oxidized fiber felt/silicon dioxide aerogel composite material and preparation method thereof | |
| CN109943169B (en) | Nano composite marine anticorrosive paint and preparation method thereof | |
| CN110317476B (en) | Nano functional coating and preparation method and application thereof | |
| WO2022147860A1 (en) | Method for preparing superhydrophobic filter material of bag-type dust collector and use thereof | |
| CN106044790B (en) | A kind of method of preparing white carbon black by precipitation method | |
| CN111003712B (en) | Preparation method of aerogel composite material | |
| CN110669363B (en) | Preparation method of transparent super-hydrophobic coating | |
| CN114196241A (en) | Photocatalytic self-cleaning coating and preparation method and application thereof | |
| CN113185898A (en) | Method for preparing super-hydrophobic dual-functional coating by adopting spraying method | |
| CN106243386B (en) | A kind of preparation method of the nm boehmite filler of surface grafting corrosion inhibitor | |
| CN116179049B (en) | Corrosion-resistant heat-insulating super-hydrophobic coating, and preparation method and application method thereof | |
| CN112063282A (en) | Flame-retardant conductive polypyrrole-polyurethane water-based composite coating and preparation method thereof | |
| WO2019062083A1 (en) | Superhydrophobic coating layer, preparation method therefor and application thereof | |
| CN112778878A (en) | Modified graphene oxide water-based anticorrosive paint and preparation method thereof | |
| CN115011245B (en) | Preparation method of amino acid intercalation talcum powder/silica sol composite coating | |
| CN111875342A (en) | Novel nano aerogel building thermal insulation material and preparation method thereof | |
| CN111057421A (en) | Graphene metal anticorrosive paint for primary equipment in coastal region and preparation method | |
| JP2003226516A (en) | Silica and method for producing the same | |
| EP3778827A1 (en) | Chemical heat storage material and method for producing same | |
| CN113881266B (en) | Application of graphene oxide and titanium dioxide composite material and anticorrosive paint | |
| CN112876093B (en) | Method for preparing silicon dioxide-titanium dioxide composite aerogel target material and rigid film by magnetron sputtering method | |
| Jin et al. | Efficient self-healing coatings embedded with polydopamine modified BTA@ DMSNs for corrosion protection | |
| CN114804648A (en) | Fluorine-free self-cleaning coating and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |