CN115651437B - Super-hydrophobic material, preparation method thereof and application thereof in drainage pipeline - Google Patents
Super-hydrophobic material, preparation method thereof and application thereof in drainage pipeline Download PDFInfo
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- CN115651437B CN115651437B CN202211377580.7A CN202211377580A CN115651437B CN 115651437 B CN115651437 B CN 115651437B CN 202211377580 A CN202211377580 A CN 202211377580A CN 115651437 B CN115651437 B CN 115651437B
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- 230000003075 superhydrophobic effect Effects 0.000 title claims abstract description 61
- 239000000463 material Substances 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000011248 coating agent Substances 0.000 claims abstract description 23
- 238000000576 coating method Methods 0.000 claims abstract description 23
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 63
- 239000003822 epoxy resin Substances 0.000 claims description 42
- 229920000647 polyepoxide Polymers 0.000 claims description 42
- 229910000077 silane Inorganic materials 0.000 claims description 32
- 239000000725 suspension Substances 0.000 claims description 27
- 239000003795 chemical substances by application Substances 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 21
- 239000006185 dispersion Substances 0.000 claims description 20
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 18
- 238000007789 sealing Methods 0.000 claims description 18
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 15
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 15
- 239000003085 diluting agent Substances 0.000 claims description 14
- 239000011259 mixed solution Substances 0.000 claims description 13
- 238000005507 spraying Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000004567 concrete Substances 0.000 claims description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 6
- 239000003349 gelling agent Substances 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 12
- 230000007797 corrosion Effects 0.000 abstract description 9
- 238000004140 cleaning Methods 0.000 abstract description 6
- 239000013049 sediment Substances 0.000 abstract description 5
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- 238000006243 chemical reaction Methods 0.000 description 4
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- 238000012360 testing method Methods 0.000 description 4
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- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical group CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- KCWYOFZQRFCIIE-UHFFFAOYSA-N ethylsilane Chemical compound CC[SiH3] KCWYOFZQRFCIIE-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
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- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 description 1
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- SCPWMSBAGXEGPW-UHFFFAOYSA-N dodecyl(trimethoxy)silane Chemical compound CCCCCCCCCCCC[Si](OC)(OC)OC SCPWMSBAGXEGPW-UHFFFAOYSA-N 0.000 description 1
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- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 description 1
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- MSRJTTSHWYDFIU-UHFFFAOYSA-N octyltriethoxysilane Chemical compound CCCCCCCC[Si](OCC)(OCC)OCC MSRJTTSHWYDFIU-UHFFFAOYSA-N 0.000 description 1
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- NMEPHPOFYLLFTK-UHFFFAOYSA-N trimethoxy(octyl)silane Chemical compound CCCCCCCC[Si](OC)(OC)OC NMEPHPOFYLLFTK-UHFFFAOYSA-N 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
Abstract
A super-hydrophobic material, a preparation method thereof and application thereof in a drainage pipeline belong to the technical field of drainage pipeline corrosion prevention, and the problem that when sediment in the pipeline is accumulated at the bottom of the pipeline, corrosive substances in the sediment are contacted with the pipeline for a long time, and extremely serious corrosion is caused to the pipeline is solved. The super-hydrophobic material is applied to the drain pipeline, and the prepared drain pipeline anticorrosive coating has a self-cleaning function.
Description
Technical Field
The invention belongs to the technical field of drainage pipeline corrosion prevention, and particularly relates to a super-hydrophobic material, a preparation method thereof and application thereof in a drainage pipeline.
Background
Corrosion is one of common diseases of a drainage pipeline, and potential safety hazards such as sewage outward emission and the like caused by corrosion and rupture of the drainage pipeline are increasingly prominent, so that social and economic development and public safety are severely restricted. At present, technical means such as anti-corrosion mortar, coating, carbon fiber reinforcement, reinforced concrete capping repair and magnesium hydroxide coating are adopted in engineering to realize the protection of the pipeline. However, when the sludge in the pipeline is accumulated at the bottom of the pipeline, corrosive substances such as sulfides in the sludge contact the pipeline for a long time, so that the pipeline can be severely corroded, and the technology can only slow down the corrosion speed of the pipeline and cannot fundamentally solve the problem of pipeline corrosion. Therefore, a pipeline anti-corrosion coating with a self-cleaning function needs to be developed, so that sediment is prevented from being deposited on the bottom of a pipeline, and the problem of pipeline corrosion is fundamentally solved.
In recent years, a superhydrophobic material with special wettability is widely paid attention to, and from the superhydrophobic research of lotus leaves by scientific researchers in 1997, the superhydrophobic surface is always a research hot spot. The super-hydrophobic material has extremely wide application prospect in medical biology, industrial and agricultural production and daily life, such as oil-water separation materials, anti-pollution fabrics, drag-reducing materials and the like. The super-hydrophobic material is applied to the asphalt pavement by Chongqing traffic university, so that the problem of pavement icing is effectively solved.
The invention applies the super-hydrophobic material to the field of drain pipeline corrosion prevention, and develops a drain pipeline corrosion prevention coating with a self-cleaning function, so as to prevent sediment from being deposited in a pipeline.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to solve the problem that when the corrosive substances in the sludge are in long-term contact with the pipeline after the sludge in the pipeline is accumulated at the bottom of the pipeline, the pipeline is extremely severely corroded, so that the super-hydrophobic material, the preparation method thereof and the application thereof in the drainage pipeline are provided. The prepared drain pipeline anticorrosive coating has a self-cleaning function.
For this purpose, the invention provides the following technical scheme.
In a first aspect, the present invention provides the use of superhydrophobic materials in a drain pipe.
Further, the application of the super-hydrophobic material in the drainage pipeline comprises the following steps: and spraying a gelatinizing agent on the surface of the drainage pipeline, and then spraying a super-hydrophobic material to form a super-hydrophobic coating.
Further, the drainage pipeline is made of concrete, plastic or ball-milling cast iron;
The gellant comprises at least one of a low viscosity epoxy resin, polyurethane, or styrene-free resin; the low viscosity epoxy resin is an epoxy resin having a viscosity of 1000 to 5000mpa.s at room temperature before curing.
The spraying thickness of the gelatinizer is required to be determined according to the material of the drainage pipeline and the like, and is not less than 3mm.
The thickness of the super-hydrophobic coating is 1-2 mm.
In a second aspect, the invention provides a method for preparing a superhydrophobic material, comprising the steps of:
Step 1, adding nano SiO 2 into a mixed solution of absolute ethyl alcohol and ammonia water to obtain SiO 2 dispersion;
Step 2, adding silane into SiO 2 dispersion liquid to prepare silane modified SiO 2 suspension liquid;
step 3, adding epoxy resin and a curing agent into the SiO 2 suspension modified by silane to prepare SiO 2 suspension modified by silane-epoxy resin;
And 4, removing liquid to obtain the super-hydrophobic anticorrosive material.
Further, in the step 1, the mass ratio of the absolute ethyl alcohol to the ammonia water is (6-9): 1, a step of;
In the SiO 2 dispersion liquid, the concentration of the nano SiO 2 is 25-35 g/L.
Further, the step 2 satisfies at least one of the following conditions:
(1) The silane is at least one of methylsilane or ethylsilane;
Alternatively, the methylsilane is N- β - (aminoethyl) - γ -aminopropyl trimethoxysilane, dodecyl trimethoxysilane, octyl trimethoxysilane or vinyl trimethoxysilane;
alternatively, the ethyl silane is 3-aminopropyl triethoxysilane, vinyl triethoxysilane, or n-octyl triethoxysilane;
Preferably N-beta- (aminoethyl) -gamma-aminopropyl trimethoxysilane;
(2) The mass of the silane and the nano SiO 2 is (2-3): 1, a step of;
(3) Adding silane into SiO 2 dispersion, sealing, stirring at normal temperature for 20-28 h, and stirring for 4-6 h after opening. The sealing is used for preventing the ammonia water and the ethanol from volatilizing too early, and the ammonia water is volatilized after the reaction is completed.
Further, a diluent is also added in the step 3, and the diluent is an inactive diluent;
optionally, the diluent is at least one of ethyl acetate, toluene or acetone;
Optionally, the mass ratio of the sum of the mass of the epoxy resin and the mass of the curing agent to the mass of the diluent is (7-10): 1;
further, the step 3 satisfies at least one of the following conditions:
(1) The mass ratio of the sum of the mass of the epoxy resin and the mass of the curing agent to the mass of the nano SiO 2 is (2-3): 1, a step of;
(2) The reaction conditions of the step 3 are as follows: stirring for 0.5-1 h at the room temperature of 1000-1500 rpm.
In step 4, the liquid is removed by heating in water bath, and the heating temperature in water bath is 60-80 ℃.
In a third aspect, there is provided a superhydrophobic material prepared according to the method described above.
Optionally, the epoxy resin in step 3 is at least one of a low viscosity epoxy resin (such as RESIPLAS PROTECT (a component)), CY179 cycloaliphatic epoxy resin or epoxy resin EP-4000;
Optionally, the curing agent is at least one of EPILINE PROTECT (component B), methyl hexahydrophthalic anhydride (MHHPA), isopropyl diamine and triethylene tetramine.
Further, the mass ratio of the epoxy resin to the curing agent is (2-3): 1.
EPILINE PROTECT is a two-component product comprising an A-component epoxy resin and a B-component curing agent.
The diluent is an inactive diluent, reduces the viscosity of the epoxy resin, increases the fluidity and slows down the curing speed.
The technical scheme of the invention has the following advantages:
1. The application of the super-hydrophobic coating in the drainage pipeline provided by the invention reduces the adhesive force between the water drops and the substrate surface due to the lower rolling angle of the super-hydrophobic coating surface, so that the water drops can roll off from the solid surface easily, and therefore, sludge carried in sewage is not easy to deposit on the surface of the pipeline, namely, the self-cleaning function is realized, long-term contact corrosion of the sludge and the pipeline is avoided, and the dredging work and cost of the drainage pipeline are effectively reduced.
The super-hydrophobic coating can ensure that the surface of the drainage pipeline has good super-hydrophobicity and can block the entry of water, thereby greatly reducing the water permeation speed to improve the corrosion resistance and the durability of the drainage pipeline.
The raw materials used in the invention are cheap and easily available chemicals, and the preparation process is simple, so that the invention can be widely applied in engineering.
2. The preparation method of the super-hydrophobic material provided by the invention comprises the following steps: step 1, adding nano SiO 2 into a mixed solution of absolute ethyl alcohol and ammonia water to obtain SiO 2 dispersion; step 2, adding silane into SiO 2 dispersion liquid to prepare silane modified SiO 2 suspension liquid; step 3, adding epoxy resin and a curing agent into the SiO 2 suspension modified by silane to prepare SiO 2 suspension modified by silane-epoxy resin; and 4, removing liquid to obtain the super-hydrophobic anticorrosive material.
The SiO 2 is modified by epoxy resin and silane, the silane is hydrolyzed to generate hydroxyl, the hydroxyl on the surface of SiO 2 is subjected to condensation reaction, the organic group of the silane is connected to the surface of SiO 2 through stable silica bond, the silane modified SiO 2 suspension is obtained, and then the epoxy resin molecule is connected to the silane molecule through the reaction of the epoxy group of the epoxy resin molecule and the amino group of the silane molecule, so that the silane-epoxy resin modified SiO 2 suspension is obtained, and has lower surface energy.
In the step 1, the absolute ethyl alcohol is used as a dispersion solvent, is low in price and easy to volatilize, and cannot remain in the prepared super-hydrophobic material, and in addition, the absolute ethyl alcohol can also play a role in dissolving assistance and ensure the stability of a solution after silane hydrolysis. The ammonia water is used for regulating the pH value of the reaction (the pH is kept between 8 and 9) so as to accelerate the reaction speed, unsaturated residual bonds O < - > exist on the surface of the nano silicon dioxide and are easy to combine with hydrogen bonds in the ammonia water, hydroxyl groups are formed on the surface of the silicon dioxide, and the weak alkaline solution can promote the hydrolysis of silane, and the ammonia water is easy to volatilize and cannot remain in the prepared super-hydrophobic material.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a photograph of example 6 in contact with water;
FIG. 2 is a photograph of example 6 using a contact angle tester to test contact angles;
FIG. 3 is a scanning electron microscope image of the surface of the superhydrophobic corrosion-resistant coating prepared in example 6;
Fig. 4 is a photograph of comparative example 1 using a contact angle tester to test the contact angle.
Detailed Description
The following examples are provided for a better understanding of the present invention and are not limited to the preferred embodiments described herein, but are not intended to limit the scope of the invention, any product which is the same or similar to the present invention, whether in light of the present teachings or in combination with other prior art features, falls within the scope of the present invention.
The specific experimental procedures or conditions are not noted in the examples and may be followed by the operations or conditions of conventional experimental procedures described in the literature in this field. The reagents or apparatus used were conventional reagent products commercially available without the manufacturer's knowledge.
Example 1
A preparation method of a super-hydrophobic material comprises the following steps:
Step 1, 3g of absolute ethyl alcohol and 0.41g of ammonia water (concentration of 25 wt%) are mixed, and magnetically stirred for 10min to form a mixed solution. 0.13g of nano SiO 2 was added to the above mixed solution and stirred for 5min to obtain SiO 2 dispersion.
Step 2, adding 0.31g N-beta- (aminoethyl) -gamma-aminopropyl trimethoxysilane into SiO 2 dispersion, sealing by a sealing film, and stirring for 1d at normal temperature; and taking off the sealing film, and continuing stirring for 4 hours, so that the color becomes transparent, and preparing the silane modified SiO 2 suspension.
Step 3, after mixing 0.2g of epoxy resin (RESIPLAS PROTECT) and 0.1g of curing agent (RESIPLAS PROTECT), adding the mixture into a silane modified SiO 2 suspension, then adding 0.03g of diluent ethyl acetate, and stirring at 1500rpm for 0.5h at room temperature to prepare a silane-epoxy resin modified SiO 2 suspension.
And 4, heating in a water bath at 80 ℃ until the liquid is completely volatilized, obtaining white super-hydrophobic solid, and grinding to obtain the super-hydrophobic material.
Example 2
A preparation method of a super-hydrophobic material comprises the following steps:
Step 1, 3.51g of absolute ethanol and 0.41g of ammonia water (concentration of 25 wt%) are mixed and magnetically stirred for 10min to form a mixed solution. 0.15g of nano SiO 2 was added to the above mixed solution and stirred for 5min to obtain SiO 2 dispersion.
Step 2, adding 0.45g N-beta- (aminoethyl) -gamma-aminopropyl trimethoxysilane into SiO 2 dispersion, sealing by a sealing film, and stirring for 20 hours at normal temperature; and taking off the sealing film, and continuing stirring for 5 hours, so that the color becomes transparent, and preparing the silane modified SiO 2 suspension.
Step 3, after mixing 0.3g of epoxy resin (RESIPLAS PROTECT) and 0.15g of curing agent (RESIPLAS PROTECT), adding the mixture into a silane modified SiO 2 suspension, then adding 0.05g of ethyl acetate, and stirring at 1000rpm for 1h at room temperature to prepare a silane-epoxy resin modified SiO 2 suspension.
And 4, heating in a water bath at 70 ℃ until the liquid is completely volatilized, obtaining white super-hydrophobic solid, and grinding to obtain the super-hydrophobic material.
Example 3
A preparation method of a super-hydrophobic material comprises the following steps:
Step 1, 2.57g of absolute ethanol and 0.41g of ammonia water (concentration of 25 wt%) are mixed and magnetically stirred for 10min to form a mixed solution. 0.1g of nano SiO 2 was added to the above mixed solution and stirred for 5min to obtain SiO 2 dispersion.
Step 2, adding 0.2g N-beta- (aminoethyl) -gamma-aminopropyl trimethoxysilane into SiO 2 dispersion, sealing by a sealing film, and stirring at normal temperature for 28 hours; and taking off the sealing film, and continuing stirring for 4 hours, so that the color becomes transparent, and preparing the silane modified SiO 2 suspension.
Step 3, after mixing 0.14g of epoxy resin (RESIPLAS PROTECT) and 0.07g of curing agent (RESIPLAS PROTECT), adding the mixture into a silane modified SiO 2 suspension, then adding 0.03g of ethyl acetate, and stirring at 1200rpm for 0.5h at room temperature to prepare a silane-epoxy resin modified SiO 2 suspension.
And 4, heating in a water bath at the temperature of 60 ℃ until the liquid is completely volatilized, obtaining white super-hydrophobic solid, and grinding to obtain the super-hydrophobic material.
Example 4
A preparation method of a super-hydrophobic material comprises the following steps:
Step1, 3g of absolute ethyl alcohol and 0.41g of ammonia water (concentration 25%) are mixed, and magnetically stirred for 10min to form a mixed solution. 0.13g of nano SiO 2 was added to the above mixed solution and stirred for 5min to obtain SiO 2 dispersion.
Step 2, adding 0.31g of 3-aminopropyl triethoxysilane into the SiO 2 dispersion, sealing by a sealing film, and stirring for 1d at normal temperature; and taking off the sealing film, and continuing stirring for 4 hours, so that the color becomes transparent, and preparing the silane modified SiO 2 suspension.
Step 3, after mixing 0.2g of epoxy resin (RESIPLAS PROTECT) and 0.1g of curing agent (RESIPLAS PROTECT), adding the mixture into a silane modified SiO 2 suspension, then adding 0.03g of ethyl acetate, and stirring at 1500rpm for 0.5h at room temperature to prepare a silane-epoxy resin modified SiO 2 suspension.
And 4, heating in a water bath at 80 ℃ until the liquid is completely volatilized, obtaining white super-hydrophobic solid, and grinding to obtain the super-hydrophobic material.
Example 5
This example is substantially the same as example 1, except that the epoxy resin in this example is CY179 and the curing agent is methyl hexahydrophthalic anhydride (MHHPA).
Example 6
Preparing a super-hydrophobic coating on the surface of a concrete block:
Fully mixing a gelatinizing agent epoxy resin (RESIPLAS PROTECT) with a curing agent, uniformly coating the mixture on the surface of a concrete block, uniformly coating the super-hydrophobic material prepared in the embodiment 1 on the resin to form a coating with the thickness of 1mm, standing for 2 hours until the resin is cured, firmly adhering the super-hydrophobic material on the surface of the cement block, blowing off excessive powder, standing for 24 hours, and testing after the resin is completely cured.
Example 7
The application of the super-hydrophobic material in the drainage pipeline, wherein the drainage pipeline is made of concrete, comprises the following steps:
Step 1, plugging: firstly, the upstream and downstream of a pipe section to be constructed of a drainage pipeline are safely blocked, and no water in the pipe section to be constructed is ensured;
step 2, dredging: removing sediment in the pipeline by using a high-pressure water truck or chemical cleaning method and the like;
Step 3, spraying a gelling agent: uniformly spraying a mixture of epoxy resin (RESIPLAS PROTECT) and a curing agent on the surface of a pipeline by using a spraying mode to form a coating with a thickness of 3 mm;
Step 4, spraying the super-hydrophobic material prepared in the embodiment 1: after the gelatinizing agent spraying is finished, the super-hydrophobic material is sprayed immediately, the thickness is 2mm, and the surface of the pipeline is ensured to be uniformly sprayed before the gelatinizing agent is solidified (namely within 2 hours after the gelatinizing agent spraying is finished).
Step 5, introducing water: after the gelling agent is completely solidified (the complete solidification time is 24 hours), the plugging device can be opened, and water is normally introduced.
Comparative example 1
A preparation method of a super-hydrophobic anti-corrosion coating comprises the following steps:
Step 1, 3g of absolute ethyl alcohol and 0.41g of ammonia water (concentration of 25 wt%) are mixed, and magnetically stirred for 10min to form a mixed solution. 0.13g of nano SiO 2 was added to the above mixed solution and stirred for 5min to obtain SiO 2 dispersion.
Step 2, adding 0.31g N-beta- (aminoethyl) -gamma-aminopropyl trimethoxysilane into SiO 2 dispersion, sealing by a sealing film, and stirring for 1d at normal temperature; and taking down the sealing film, and stirring for 4 hours continuously until the color becomes transparent, so as to prepare a silane modified SiO 2 suspension.
Step 3, after mixing 0.2g of epoxy resin (RESIPLAS PROTECT) and 0.1g of curing agent (RESIPLAS PROTECT), adding the mixture into a silane modified SiO 2 suspension, then adding 0.03g of diluent ethyl acetate, and stirring at 1500rpm for 0.5h at room temperature to prepare a silane-epoxy resin modified SiO 2 suspension.
And 4, spraying the SiO 2 suspension modified by the silane-epoxy resin prepared in the step 3 on the surface of a concrete block, standing, spraying again after the liquid is changed into gel, covering the substrate by the gel liquid for 2mm, standing for 24 hours, and adhering the modified silicon dioxide on the surface of the substrate by using the resin after the resin is completely solidified.
A photograph of the contact angle of comparative example 1 measured using a contact angle tester is shown in fig. 4.
Test examples
(1) The water contact angle was measured by a contact angle tester, and the results are shown in table 1.
TABLE 1 Water contact Angle of superhydrophobic anti-corrosive coating
| Contact angle of water | |
| Example 1 | 152.15 |
| Example 2 | 151.52 |
| Example 3 | 150.15 |
| Example 4 | 144.51 |
| Example 5 | 146.15 |
| Example 6 | 152.15° |
| Comparative example 1 | 137.14° |
As shown in FIG. 1 and FIG. 2, the super-hydrophobic anticorrosive coating prepared in example 6 has a surface contact angle of 152.15 degrees with water, and is a super-hydrophobic particulate matter.
(2) The microstructure of the surface of the super-hydrophobic anticorrosive coating prepared in example 6 is observed by using a scanning electron microscope, as shown in fig. 3, and it can be seen from the figure that the surface of the concrete block is uniformly covered with a layer of nano particles.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (5)
1. The application of the super-hydrophobic material in a drainage pipeline is characterized by comprising the following steps: spraying a gelatinizing agent on the surface of the drainage pipeline, and then spraying a super-hydrophobic material to form a super-hydrophobic coating; the thickness of the super-hydrophobic coating is 1-2 mm;
the drainage pipeline is made of concrete;
the gelling agent comprises at least one of low-viscosity epoxy resin and polyurethane; the low-viscosity epoxy resin is epoxy resin with the viscosity of 1000-5000 Pa.s at room temperature before curing;
the preparation method of the super-hydrophobic material comprises the following steps:
Step 1, adding nano SiO 2 into a mixed solution of absolute ethyl alcohol and ammonia water to obtain SiO 2 dispersion; in the SiO 2 dispersion liquid, the concentration of the nano SiO 2 is 25-35 g/L;
Step 2, adding silane into SiO 2 dispersion liquid, sealing, stirring for 20-28 hours at normal temperature, and stirring for 4-6 hours after opening to prepare silane modified SiO 2 suspension liquid;
Step 3, adding epoxy resin and a curing agent into the SiO 2 suspension modified by silane, and stirring for 0.5-1h at the rotating speed of 1000-1500 rpm at room temperature to prepare a SiO 2 suspension modified by silane-epoxy resin;
Step 4, heating in water bath to remove liquid, and preparing the super-hydrophobic material;
The mass ratio of the sum of the epoxy resin and the curing agent to the nano SiO 2 is (2-3): 1, a step of;
The mass of the silane and the nano SiO 2 is (2-3): 1, a step of;
In the step 1, the mass ratio of the absolute ethyl alcohol to the ammonia water is (6-9): 1, a step of;
the epoxy resin and the curing agent are RESIPLAS PROTECT epoxy resin and curing agent;
The silane is N-beta- (aminoethyl) -gamma-aminopropyl trimethoxysilane.
2. The use of the superhydrophobic material according to claim 1 in a drain line, wherein a diluent is further added in the step 3, and the diluent is an inactive diluent.
3. The use of the superhydrophobic material according to claim 2 in a drain pipe, wherein the diluent is at least one of ethyl acetate, toluene or acetone.
4. The application of the super-hydrophobic material in a drainage pipeline according to claim 2, wherein in the step 3, the mass ratio of the sum of the mass of the epoxy resin and the mass of the curing agent to the mass of the diluent is (7-10): 1.
5. The application of the superhydrophobic material according to claim 1 in a drainage pipeline, wherein in the step 4, the water bath heating temperature is 60-80 ℃.
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