CN117229687B - Hydrophobic coating for natural gas gasifier and preparation method thereof - Google Patents
Hydrophobic coating for natural gas gasifier and preparation method thereof Download PDFInfo
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- CN117229687B CN117229687B CN202311500615.6A CN202311500615A CN117229687B CN 117229687 B CN117229687 B CN 117229687B CN 202311500615 A CN202311500615 A CN 202311500615A CN 117229687 B CN117229687 B CN 117229687B
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 230000002209 hydrophobic effect Effects 0.000 title claims abstract description 35
- 239000011248 coating agent Substances 0.000 title claims abstract description 34
- 238000000576 coating method Methods 0.000 title claims abstract description 34
- 239000003345 natural gas Substances 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims description 30
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 98
- 239000011521 glass Substances 0.000 claims abstract description 87
- 239000003607 modifier Substances 0.000 claims abstract description 87
- 239000011324 bead Substances 0.000 claims abstract description 81
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 44
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 44
- 239000000080 wetting agent Substances 0.000 claims abstract description 30
- 239000000839 emulsion Substances 0.000 claims abstract description 24
- 239000003960 organic solvent Substances 0.000 claims abstract description 22
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 18
- 229920002545 silicone oil Polymers 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 10
- 239000004005 microsphere Substances 0.000 claims abstract description 6
- 238000000498 ball milling Methods 0.000 claims description 25
- 230000001105 regulatory effect Effects 0.000 claims description 19
- 238000007654 immersion Methods 0.000 claims description 18
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 16
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical class [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- 238000005406 washing Methods 0.000 claims description 15
- ICAKDTKJOYSXGC-UHFFFAOYSA-K lanthanum(iii) chloride Chemical compound Cl[La](Cl)Cl ICAKDTKJOYSXGC-UHFFFAOYSA-K 0.000 claims description 14
- 229920001661 Chitosan Polymers 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical group CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000012286 potassium permanganate Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 235000021355 Stearic acid Nutrition 0.000 claims description 8
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 8
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 8
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 8
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 8
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 8
- 239000008117 stearic acid Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- IEKHISJGRIEHRE-UHFFFAOYSA-N 16-methylheptadecanoic acid;propan-2-ol;titanium Chemical compound [Ti].CC(C)O.CC(C)CCCCCCCCCCCCCCC(O)=O.CC(C)CCCCCCCCCCCCCCC(O)=O.CC(C)CCCCCCCCCCCCCCC(O)=O IEKHISJGRIEHRE-UHFFFAOYSA-N 0.000 claims description 6
- NGDQQLAVJWUYSF-UHFFFAOYSA-N 4-methyl-2-phenyl-1,3-thiazole-5-sulfonyl chloride Chemical compound S1C(S(Cl)(=O)=O)=C(C)N=C1C1=CC=CC=C1 NGDQQLAVJWUYSF-UHFFFAOYSA-N 0.000 claims description 6
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 150000002009 diols Chemical class 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 239000003973 paint Substances 0.000 claims 1
- 239000000853 adhesive Substances 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 42
- 239000000203 mixture Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 7
- 229910010271 silicon carbide Inorganic materials 0.000 description 7
- 239000007864 aqueous solution Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 3
- 239000003949 liquefied natural gas Substances 0.000 description 3
- 230000003750 conditioning effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
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- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention discloses a hydrophobic coating for a natural gas gasifier, which comprises the following raw materials in parts by weight: 15-20 parts of silicone-acrylic emulsion, 10-20 parts of silicone oil, 40-50 parts of organic solvent, 6-10 parts of silane coupling agent KH560, 10-20 parts of nano-silica blended glass bead modifier, 6-10 parts of whisker modifier and 1-3 parts of wetting agent. The hydrophobic coating adopts silicone-acrylate emulsion and silicone oil to match, the interfacial property of the system is coordinated and optimized through the matching use of a silane coupling agent KH56 and a wetting agent, the nano silicon dioxide and the glass microsphere modifier and the whisker modifier are synergistic in both directions, the hydrophobicity, the adhesive force and the wear resistance of the product can be improved and treated in a coordinated manner.
Description
Technical Field
The invention relates to the technical field of hydrophobic coating, in particular to a hydrophobic coating for a natural gas gasifier and a preparation method thereof.
Background
Because of the low density, the gaseous natural gas is inconvenient to transport and store, and the gaseous natural gas is converted into liquid natural gas after being cooled to-162 ℃, and the volume of the natural gas with the same weight is reduced to 1/625 of the original volume, so that the gaseous natural gas needs to be transported and stored after being liquefied. However, liquefied natural gas cannot be directly used, the liquefied natural gas is required to be converted from a liquid state to a gas state through a corresponding gasification device and then is input into a pipeline for use, and in order to optimize the hydrophobicity of the coating for the natural gas gasifier, the adhesive force and the wear resistance of the coating are poor, so that the hydrophobicity, the adhesive force and the wear resistance of the product are difficult to coordinate and improve, and the use efficiency of the product is limited.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a hydrophobic coating for a natural gas gasifier and a preparation method thereof, so as to solve the problems in the prior art.
The invention solves the technical problems by adopting the following technical scheme:
the invention provides a hydrophobic coating for a natural gas gasifier, which comprises the following raw materials in parts by weight:
15-20 parts of silicone-acrylic emulsion, 10-20 parts of silicone oil, 40-50 parts of organic solvent, 6-10 parts of silane coupling agent KH560, 10-20 parts of nano-silica blended glass bead modifier, 6-10 parts of whisker modifier and 1-3 parts of wetting agent.
Preferably, the hydrophobic coating comprises the following raw materials in parts by weight:
17.5 parts of silicone-acrylic emulsion, 15 parts of silicone oil, 45 parts of organic solvent, 8 parts of silane coupling agent KH560, 15 parts of nano-silica blending glass microsphere modifier, 8 parts of whisker modifier and 2 parts of wetting agent.
Preferably, the silicon content of the silicone-acrylic emulsion is not less than 5%, and the solid content is 35-40%; the organic solvent is ethanol; the wetting agent is acetylenic diol wetting agent.
Preferably, the preparation method of the nano silicon dioxide blended glass bead modifier comprises the following steps:
heat-treating nano silicon dioxide at 210-220 ℃ for 5-10min, then air-cooling to room temperature, and then sending into yttrium nitrate solution with the mass fraction of 10% for immersing improvement treatment to obtain pre-improved nano silicon dioxide;
uniformly mixing the pre-improved nano silicon dioxide and glass bead regulating solution according to a weight ratio of 5:1, ball-milling for 1-2 hours at a ball milling rotating speed of 1000-1500r/min, and after ball milling, washing and drying to obtain the nano silicon dioxide blended glass bead modifier.
Preferably, the immersion pressure of the immersion improvement treatment is 10-15MPa and the immersion time is 10-20min.
Preferably, the preparation method of the glass bead regulating liquid comprises the following steps:
and (3) sending the glass beads into a chitosan solution with the weight being 3-5 times that of the glass beads, uniformly stirring, then adding isopropyl triisostearoyl titanate accounting for 4-7% of the total weight of the glass beads, stearic acid accounting for 1-3% of the total weight of the glass beads and ammonium persulfate accounting for 2-4% of the total weight of the glass beads, and uniformly stirring to obtain the glass bead regulating solution.
Preferably, the mass fraction of the chitosan aqueous solution is 4-6%.
Preferably, the preparation method of the whisker modifier comprises the following steps:
the method comprises the steps of (1) feeding silicon carbide whiskers into a potassium permanganate solution with the weight being 3-6 times of the total weight of the silicon carbide whiskers, then adding silica sol with the weight being 2-5% of the total weight of the silicon carbide whiskers, uniformly stirring, washing with water, and drying to obtain a pre-modifier; adding 3-6% of hexadecyl trimethyl ammonium bromide, 1-3% of sodium dodecyl benzene sulfonate and 5-10% of lanthanum chloride solution into the pre-modifier, ball milling for 1-2h at the rotating speed of 1000-1500r/min, and washing and drying to obtain the whisker modifier.
Preferably, the mass fraction of the potassium permanganate solution is 10-15%.
Preferably, the lanthanum chloride solution has a mass fraction of 4-8%.
The invention also provides a preparation method of the hydrophobic coating for the natural gas gasifier, which comprises the following steps: the silicone-acrylate emulsion and the organic solvent are stirred and mixed uniformly to obtain a spare material, then the nano silicon dioxide is mixed with the glass bead modifier, the whisker modifier, the silane coupling agent KH560 and the silicone oil to be stirred fully, then the spare material is added, and finally the wetting agent is added to obtain the hydrophobic coating.
Compared with the prior art, the invention has the following beneficial effects:
the hydrophobic coating adopts silicone-acrylate emulsion and silicone oil to match, the interfacial property of the system is coordinated and optimized through the matching use of a silane coupling agent KH56 and a wetting agent, the nano silicon dioxide and the glass microsphere modifier and the whisker modifier are synergistic in both directions, the hydrophobicity, the adhesive force and the wear resistance of the product can be improved and treated in a coordinated manner.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the 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.
The invention provides a hydrophobic coating for a natural gas gasifier, which comprises the following raw materials in parts by weight:
15-20 parts of silicone-acrylic emulsion, 10-20 parts of silicone oil, 40-50 parts of organic solvent, 6-10 parts of silane coupling agent KH560, 10-20 parts of nano-silica blended glass bead modifier, 6-10 parts of whisker modifier and 1-3 parts of wetting agent.
The hydrophobic coating of the embodiment comprises the following raw materials in parts by weight:
17.5 parts of silicone-acrylic emulsion, 15 parts of silicone oil, 45 parts of organic solvent, 8 parts of silane coupling agent KH560, 15 parts of nano-silica blending glass microsphere modifier, 8 parts of whisker modifier and 2 parts of wetting agent.
The silicon content of the silicone-acrylic emulsion of the embodiment is not less than 5%, and the solid content is 35-40%; the organic solvent is ethanol; the wetting agent is acetylenic diol wetting agent.
The preparation method of the nano silicon dioxide blended glass bead modifier comprises the following steps:
heat-treating nano silicon dioxide at 210-220 ℃ for 5-10min, then air-cooling to room temperature, and then sending into yttrium nitrate solution with the mass fraction of 10% for immersing improvement treatment to obtain pre-improved nano silicon dioxide;
uniformly mixing the pre-improved nano silicon dioxide and glass bead regulating solution according to a weight ratio of 5:1, ball-milling for 1-2 hours at a ball milling rotating speed of 1000-1500r/min, and after ball milling, washing and drying to obtain the nano silicon dioxide blended glass bead modifier.
The immersion pressure of the immersion improvement treatment of this example was 10-15MPa, and the immersion time was 10-20min.
The preparation method of the glass bead regulating liquid comprises the following steps:
and (3) sending the glass beads into a chitosan solution with the weight being 3-5 times that of the glass beads, uniformly stirring, then adding isopropyl triisostearoyl titanate accounting for 4-7% of the total weight of the glass beads, stearic acid accounting for 1-3% of the total weight of the glass beads and ammonium persulfate accounting for 2-4% of the total weight of the glass beads, and uniformly stirring to obtain the glass bead regulating solution.
The mass fraction of the chitosan aqueous solution of the embodiment is 4-6%.
The preparation method of the whisker modifier in the embodiment comprises the following steps:
the method comprises the steps of (1) feeding silicon carbide whiskers into a potassium permanganate solution with the weight being 3-6 times of the total weight of the silicon carbide whiskers, then adding silica sol with the weight being 2-5% of the total weight of the silicon carbide whiskers, uniformly stirring, washing with water, and drying to obtain a pre-modifier; adding 3-6% of hexadecyl trimethyl ammonium bromide, 1-3% of sodium dodecyl benzene sulfonate and 5-10% of lanthanum chloride solution into the pre-modifier, ball milling for 1-2h at the rotating speed of 1000-1500r/min, and washing and drying to obtain the whisker modifier.
The mass fraction of the potassium permanganate solution of the embodiment is 10-15%.
The mass fraction of the lanthanum chloride solution in the embodiment is 4-8%.
The preparation method of the hydrophobic coating for the natural gas gasifier comprises the following steps: the silicone-acrylate emulsion and the organic solvent are stirred and mixed uniformly to obtain a spare material, then the nano silicon dioxide is mixed with the glass bead modifier, the whisker modifier, the silane coupling agent KH560 and the silicone oil to be stirred fully, then the spare material is added, and finally the wetting agent is added to obtain the hydrophobic coating.
Example 1
The hydrophobic coating for the natural gas gasifier comprises the following raw materials in parts by weight:
15 parts of silicone-acrylic emulsion, 10 parts of silicone oil, 40 parts of organic solvent, 6 parts of silane coupling agent KH560, 10 parts of nano-silica blended glass bead modifier, 6 parts of whisker modifier and 1 part of wetting agent.
The silicon content of the silicone-acrylic emulsion of the embodiment is not less than 5%, and the solid content is 35-40%; the organic solvent is ethanol; the wetting agent is acetylenic diol wetting agent.
The preparation method of the nano silicon dioxide blended glass bead modifier comprises the following steps:
firstly, delivering nano silicon dioxide into 210 ℃ for heat treatment for 5min, then air-cooling to room temperature, and then delivering into 10 mass percent yttrium nitrate solution for immersing improvement treatment to obtain pre-improved nano silicon dioxide;
uniformly mixing the pre-improved nano silicon dioxide and glass bead regulating solution according to the weight ratio of 5:1, sending the mixture into a ball milling rotating speed of 1000r/min for ball milling for 1h, and after ball milling, washing and drying the mixture to obtain the nano silicon dioxide blended glass bead modifier.
The immersion pressure of the immersion improvement treatment of this example was 10MPa, and the immersion time was 10min.
The preparation method of the glass bead regulating liquid comprises the following steps:
and (3) sending the glass beads into a chitosan solution with the weight being 3 times that of the glass beads, uniformly stirring, adding isopropyl triisostearoyl titanate accounting for 4% of the total weight of the glass beads, stearic acid accounting for 1% of the total weight of the glass beads and ammonium persulfate accounting for 2% of the total weight of the glass beads, and uniformly stirring to obtain the glass bead regulating solution.
The mass fraction of the chitosan aqueous solution of this example was 4%.
The preparation method of the whisker modifier in the embodiment comprises the following steps:
the silicon carbide whisker is sent into a potassium permanganate solution which is 3 times of the silicon carbide whisker, then silica sol accounting for 2 percent of the total amount of the silicon carbide whisker is added, and the mixture is stirred, washed and dried to obtain a pre-modifier; adding 3% of hexadecyl trimethyl ammonium bromide, 1% of sodium dodecyl benzene sulfonate and 5% of lanthanum chloride solution into the pre-modifier, ball milling for 1h at a rotating speed of 1000r/min, water washing and drying to obtain the whisker modifier.
The mass fraction of the potassium permanganate solution of this example was 10%.
The lanthanum chloride solution of this example was 4% by mass.
The preparation method of the hydrophobic coating for the natural gas gasifier comprises the following steps: the silicone-acrylate emulsion and the organic solvent are stirred and mixed uniformly, then the nano silicon dioxide is mixed with the glass bead modifier, the whisker modifier, the silane coupling agent KH560 and the silicone oil to be stirred fully, then the mixture is added, and finally the wetting agent is added to obtain the hydrophobic coating.
Example 2
The hydrophobic coating for the natural gas gasifier comprises the following raw materials in parts by weight:
20 parts of silicone-acrylic emulsion, 20 parts of silicone oil, 50 parts of organic solvent, 10 parts of silane coupling agent KH560, 20 parts of nano-silica blended glass bead modifier, 10 parts of whisker modifier and 3 parts of wetting agent.
The silicon content of the silicone-acrylic emulsion of the embodiment is not less than 5%, and the solid content is 35-40%; the organic solvent is ethanol; the wetting agent is acetylenic diol wetting agent.
The preparation method of the nano silicon dioxide blended glass bead modifier comprises the following steps:
firstly, delivering nano silicon dioxide into 220 ℃ for heat treatment for 10min, then air-cooling to room temperature, and then delivering into 10 mass percent yttrium nitrate solution for immersing improvement treatment to obtain pre-improved nano silicon dioxide;
uniformly mixing the pre-improved nano silicon dioxide and glass bead regulating solution according to the weight ratio of 5:1, sending the mixture into a ball milling rotating speed of 1500r/min for ball milling for 2 hours, and after ball milling, washing and drying the mixture to obtain the nano silicon dioxide blended glass bead modifier.
The immersion pressure of the immersion improvement treatment of this example was 15MPa, and the immersion time was 20min.
The preparation method of the glass bead regulating liquid comprises the following steps:
and (3) sending the glass beads into a chitosan solution with the weight being 5 times that of the glass beads, uniformly stirring, adding isopropyl triisostearoyl titanate accounting for 7% of the total weight of the glass beads, stearic acid accounting for 3% of the total weight of the glass beads and ammonium persulfate accounting for 2-4% of the total weight of the glass beads, and uniformly stirring to obtain the glass bead regulating solution.
The mass fraction of the chitosan aqueous solution of this example was 6%.
The preparation method of the whisker modifier in the embodiment comprises the following steps:
the silicon carbide whisker is sent into a potassium permanganate solution with the volume of 6 times, then silica sol with the volume of 5 percent of the total volume of the silicon carbide whisker is added, and the mixture is stirred, washed and dried to obtain a pre-modifier; adding 6% of hexadecyl trimethyl ammonium bromide, 3% of sodium dodecyl benzene sulfonate and 10% of lanthanum chloride solution into the pre-modifier, ball milling for 2h at 1500r/min, water washing and drying to obtain the whisker modifier.
The mass fraction of the potassium permanganate solution of this example was 15%.
The lanthanum chloride solution of this example was 8% by mass.
The preparation method of the hydrophobic coating for the natural gas gasifier comprises the following steps: the silicone-acrylate emulsion and the organic solvent are stirred and mixed uniformly, then the nano silicon dioxide is mixed with the glass bead modifier, the whisker modifier, the silane coupling agent KH560 and the silicone oil to be stirred fully, then the mixture is added, and finally the wetting agent is added to obtain the hydrophobic coating.
Example 3
The hydrophobic coating for the natural gas gasifier comprises the following raw materials in parts by weight:
17.5 parts of silicone-acrylic emulsion, 15 parts of silicone oil, 45 parts of organic solvent, 8 parts of silane coupling agent KH560, 15 parts of nano-silica blending glass microsphere modifier, 8 parts of whisker modifier and 2 parts of wetting agent.
The silicon content of the silicone-acrylic emulsion of the embodiment is not less than 5%, and the solid content is 37.5%; the organic solvent is ethanol; the wetting agent is acetylenic diol wetting agent.
The preparation method of the nano silicon dioxide blended glass bead modifier comprises the following steps:
firstly, delivering nano silicon dioxide into 215 ℃ for heat treatment for 7.5min, then air-cooling to room temperature, and then delivering into 10% yttrium nitrate solution by mass fraction for immersing improvement treatment to obtain pre-improved nano silicon dioxide;
uniformly mixing the pre-improved nano silicon dioxide and glass bead regulating solution according to a weight ratio of 5:1, sending the mixture into a ball milling rotating speed of 1250r/min for ball milling for 1.5 hours, and after ball milling, washing and drying the mixture to obtain the nano silicon dioxide blended glass bead modifier.
The immersion pressure of the immersion improvement treatment of this example was 12.5MPa, and the immersion time was 15min.
The preparation method of the glass bead regulating liquid comprises the following steps:
and (3) sending the glass beads into a chitosan solution with the weight being 4 times that of the glass beads, uniformly stirring, adding isopropyl triisostearoyl titanate accounting for 5.5% of the total weight of the glass beads, stearic acid accounting for 2% of the total weight of the glass beads and ammonium persulfate accounting for 3% of the total weight of the glass beads, and uniformly stirring to obtain the glass bead regulating solution.
The mass fraction of the chitosan aqueous solution of this example was 5%.
The preparation method of the whisker modifier in the embodiment comprises the following steps:
the silicon carbide whisker is sent into 4.5 times potassium permanganate solution, then silica sol accounting for 3.5 percent of the total amount of the silicon carbide whisker is added, and the mixture is stirred uniformly, washed and dried to obtain a pre-modifier; adding 4.5% of cetyltrimethylammonium bromide, 2% of sodium dodecyl benzene sulfonate and 7.5% of lanthanum chloride solution into the pre-modifier, ball milling for 1.5h at 1250r/min, water washing and drying to obtain the whisker modifier.
The mass fraction of the potassium permanganate solution of this example was 12.5%.
The lanthanum chloride solution of this example has a mass fraction of 6%.
The preparation method of the hydrophobic coating for the natural gas gasifier comprises the following steps: the silicone-acrylate emulsion and the organic solvent are stirred and mixed uniformly, then the nano silicon dioxide is mixed with the glass bead modifier, the whisker modifier, the silane coupling agent KH560 and the silicone oil to be stirred fully, then the mixture is added, and finally the wetting agent is added to obtain the hydrophobic coating.
Comparative example 1.
The difference from example 3 is that no nanosilica blend glass bead modifier was added.
Comparative example 2.
The difference from example 3 is that the nanosilica blend glass bead modifier was not treated with the glass bead conditioning liquid.
Comparative example 3.
The difference from example 3 is that the preparation method of the glass bead conditioning liquid is different; stearic acid and ammonium persulfate were not added.
Comparative example 4.
The difference from example 3 is that the pre-modified nanosilica is replaced by nanosilica.
Comparative example 5.
The difference from example 3 is that no whisker modifier is added.
Comparative example 6.
The difference from example 3 is that sodium dodecylbenzenesulfonate and lanthanum chloride solution were not added in the preparation of whisker modifier.
And placing the product for 12 hours under the conventional condition and the water mist condition, and testing the waterproof performance.
The results of the performance measurements of examples 1-3 and comparative examples 1-6 are as follows
.
The product of the invention has excellent peel strength and wear resistance, can achieve the coordination effect of the peel strength and the wear resistance, can achieve the coordination significant improvement of the peel strength and the wear resistance, and has excellent stability under the waterproof condition; the performance of the product is obviously reduced without adding one of the nano silicon dioxide blended glass bead modifier and the whisker modifier, the nano silicon dioxide blended glass bead modifier and the whisker modifier are cooperated to realize synergistic effect, and the performance of the product can be optimized in a coordinated manner;
meanwhile, the nano silicon dioxide blended glass bead modifier is not treated by adopting glass bead regulating liquid, stearic acid and ammonium persulfate are not added, the pre-improved nano silicon dioxide is replaced by nano silicon dioxide, sodium dodecyl benzene sulfonate and lanthanum chloride solution are not added in the preparation of the whisker modifier, the performance of the product is prone to be deteriorated, and the nano silicon dioxide blended glass bead modifier and the whisker modifier prepared by adopting the method disclosed by the invention are synergistically enhanced, so that the performance of the product is synergistically improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (8)
1. The hydrophobic coating for the natural gas gasifier is characterized by comprising the following raw materials in parts by weight:
15-20 parts of silicone-acrylic emulsion, 10-20 parts of silicone oil, 40-50 parts of organic solvent, 6-10 parts of silane coupling agent KH560, 10-20 parts of nano-silica blended glass bead modifier, 6-10 parts of whisker modifier and 1-3 parts of wetting agent;
the preparation method of the nano silicon dioxide blended glass bead modifier comprises the following steps:
heat-treating nano silicon dioxide for 5-10min at 210-220 ℃, then air-cooling to room temperature, and then sending into yttrium nitrate solution with the mass fraction of 10% for immersing improvement treatment to obtain pre-improved nano silicon dioxide;
uniformly mixing the pre-improved nano silicon dioxide and glass bead regulating solution according to a weight ratio of 5:1, ball-milling for 1-2 hours at a ball milling rotating speed of 1000-1500r/min, and after ball milling, washing and drying to obtain the nano silicon dioxide blended glass bead modifier;
the preparation method of the whisker modifier comprises the following steps:
the method comprises the steps of (1) feeding silicon carbide whiskers into a potassium permanganate solution with the weight being 3-6 times of the total weight of the silicon carbide whiskers, then adding silica sol with the weight being 2-5% of the total weight of the silicon carbide whiskers, uniformly stirring, washing with water, and drying to obtain a pre-modifier; adding hexadecyl trimethyl ammonium bromide accounting for 3-6% of the total amount of the pre-modifier, sodium dodecyl benzene sulfonate accounting for 1-3% of the total amount of the pre-modifier and lanthanum chloride solution accounting for 5-10% of the total amount of the pre-modifier into the pre-modifier, ball milling for 1-2 hours at the rotating speed of 1000-1500r/min, finishing ball milling, washing with water, and drying to obtain a whisker modifier;
the preparation method of the glass bead regulating liquid comprises the following steps:
and (3) sending the glass beads into a chitosan solution with the weight being 3-5 times that of the glass beads, uniformly stirring, then adding isopropyl triisostearoyl titanate accounting for 4-7% of the total weight of the glass beads, stearic acid accounting for 1-3% of the total weight of the glass beads and ammonium persulfate accounting for 2-4% of the total weight of the glass beads, and uniformly stirring to obtain the glass bead regulating solution.
2. The hydrophobic coating for the natural gas gasifier according to claim 1, wherein the hydrophobic coating comprises the following raw materials in parts by weight:
17.5 parts of silicone-acrylic emulsion, 15 parts of silicone oil, 45 parts of organic solvent, 8 parts of silane coupling agent KH560, 15 parts of nano-silica blending glass microsphere modifier, 8 parts of whisker modifier and 2 parts of wetting agent.
3. The hydrophobic coating for a natural gas gasifier according to claim 1, wherein the silicon content of the silicone-acrylic emulsion is not less than 5%, and the solid content is 35-40%; the organic solvent is ethanol; the wetting agent is acetylenic diol wetting agent.
4. A hydrophobic finish for a natural gas gasifier according to claim 1 wherein the immersion pressure of the immersion improvement treatment is 10-15MPa and the immersion time is 10-20min.
5. The hydrophobic coating for a natural gas gasifier according to claim 1, wherein the mass fraction of the chitosan solution is 4-6%.
6. The hydrophobic paint for a natural gas gasifier according to claim 1, wherein the mass fraction of the potassium permanganate solution is 10-15%.
7. A hydrophobic finish for a natural gas gasifier according to claim 1 wherein the lanthanum chloride solution is 4-8% by mass.
8. A method of preparing a hydrophobic coating for a natural gas gasifier according to any one of claims 1 to 7, comprising the steps of: the silicone-acrylate emulsion and the organic solvent are stirred and mixed uniformly to obtain a spare material, then the nano silicon dioxide is mixed with the glass bead modifier, the whisker modifier, the silane coupling agent KH560 and the silicone oil to be stirred fully, then the spare material is added, and finally the wetting agent is added to obtain the hydrophobic coating.
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| CN117964830B (en) * | 2024-03-29 | 2024-06-04 | 广东东方一哥新材料股份有限公司 | Acrylic ester emulsion and application thereof in preparation of waterproof coating |
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