CN108997618B - Modified composition of corrosion-resistant sealing ring and preparation method thereof - Google Patents
Modified composition of corrosion-resistant sealing ring and preparation method thereof Download PDFInfo
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- CN108997618B CN108997618B CN201810530862.3A CN201810530862A CN108997618B CN 108997618 B CN108997618 B CN 108997618B CN 201810530862 A CN201810530862 A CN 201810530862A CN 108997618 B CN108997618 B CN 108997618B
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- 239000000203 mixture Substances 0.000 title claims abstract description 37
- 238000007789 sealing Methods 0.000 title claims abstract description 34
- 238000005260 corrosion Methods 0.000 title claims abstract description 30
- 230000007797 corrosion Effects 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 35
- 239000004917 carbon fiber Substances 0.000 claims abstract description 35
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000001035 drying Methods 0.000 claims abstract description 20
- 239000002131 composite material Substances 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000012065 filter cake Substances 0.000 claims abstract description 14
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 150000003751 zinc Chemical class 0.000 claims abstract description 13
- 229920000858 Cyclodextrin Polymers 0.000 claims abstract description 12
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 12
- 238000001354 calcination Methods 0.000 claims abstract description 12
- HFHDHCJBZVLPGP-UHFFFAOYSA-N schardinger α-dextrin Chemical compound O1C(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(O)C2O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC2C(O)C(O)C1OC2CO HFHDHCJBZVLPGP-UHFFFAOYSA-N 0.000 claims abstract description 12
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229960000892 attapulgite Drugs 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 229910052625 palygorskite Inorganic materials 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 10
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims abstract description 10
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 10
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 10
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000004202 carbamide Substances 0.000 claims abstract description 9
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 9
- 230000001681 protective effect Effects 0.000 claims abstract description 8
- 150000001721 carbon Chemical class 0.000 claims abstract description 7
- 230000035484 reaction time Effects 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 10
- 239000002253 acid Substances 0.000 abstract description 3
- 239000003513 alkali Substances 0.000 abstract description 3
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical group [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229910001961 silver nitrate Inorganic materials 0.000 description 4
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 4
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 description 4
- 229920000459 Nitrile rubber Polymers 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 description 2
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 description 2
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 235000005074 zinc chloride Nutrition 0.000 description 2
- 239000011592 zinc chloride Substances 0.000 description 2
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 2
- 229960001763 zinc sulfate Drugs 0.000 description 2
- 229910000368 zinc sulfate Inorganic materials 0.000 description 2
- ZCSHACFHMFHFKK-UHFFFAOYSA-N 2-methyl-1,3,5-trinitrobenzene;2,4,6-trinitro-1,3,5-triazinane Chemical class [O-][N+](=O)C1NC([N+]([O-])=O)NC([N+]([O-])=O)N1.CC1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O ZCSHACFHMFHFKK-UHFFFAOYSA-N 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000001595 contractor effect Effects 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 229910003440 dysprosium oxide Inorganic materials 0.000 description 1
- NLQFUUYNQFMIJW-UHFFFAOYSA-N dysprosium(iii) oxide Chemical compound O=[Dy]O[Dy]=O NLQFUUYNQFMIJW-UHFFFAOYSA-N 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 229920005560 fluorosilicone rubber Polymers 0.000 description 1
- 229920006168 hydrated nitrile rubber Polymers 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910001954 samarium oxide Inorganic materials 0.000 description 1
- 229940075630 samarium oxide Drugs 0.000 description 1
- FKTOIHSPIPYAPE-UHFFFAOYSA-N samarium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[Sm+3].[Sm+3] FKTOIHSPIPYAPE-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- 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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
-
- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/06—Elements
-
- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/08—Ingredients agglomerated by treatment with a binding agent
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/221—Oxides; Hydroxides of metals of rare earth metal
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Chemical & Material Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention provides a modified composition of a corrosion-resistant sealing ring and a preparation method thereof, wherein the preparation method comprises the following steps: 1) carrying out contact reaction on carbon fibers, cyclodextrin, a silane coupling agent and water, filtering, taking a filter cake and drying to obtain modified carbon fibers; 2) carrying out hydrothermal reaction on modified carbon fibers, silver salt, zinc salt, urea and water, filtering to obtain a filter cake, and finally calcining in the presence of protective gas to obtain composite carbon fibers; 3) and mixing the composite carbon fiber, shell powder, attapulgite, silicon carbide and rare earth oxide to prepare the modified composition of the corrosion-resistant sealing ring. The modified composition prepared by the method can greatly improve the acid resistance and alkali resistance of the sealing ring.
Description
Technical Field
The invention relates to a sealing ring, in particular to a modified composition of a corrosion-resistant sealing ring and a preparation method thereof.
Background
The sealing element generally comprises a dynamic ring, a static ring and a sealing ring; wherein the sealing ring plays an essential role in the sealing effect of the sealing element. The seal ring generally satisfies the following conditions: the product is rich in elasticity and resilience; suitable mechanical strength including tensile strength, elongation, tear strength, and the like; the material is stable, is not easy to swell in a medium, and has small thermal contraction effect (Joule effect); the processing and the forming are easy, and the precise size can be kept; does not corrode the contact surface and does not pollute the medium, etc.
At present, sealing elements are divided into NBR nitrile rubber sealing rings, HNBR hydrogenated nitrile rubber sealing rings, FLS fluorosilicone rubber sealing rings, CR chloroprene rubber sealing rings and the like according to materials, and although the sealing elements can basically meet production requirements, the corrosion resistance of the sealing elements in certain specific environments is difficult to meet the requirements, and the sealing elements are difficult to simultaneously meet the requirements of acid resistance or alkali resistance.
Disclosure of Invention
The invention aims to provide a modified composition of a corrosion-resistant sealing ring and a preparation method thereof.
In order to achieve the above object, the present invention provides a method for preparing a modified composition for a corrosion-resistant seal ring, the method comprising:
1) carrying out contact reaction on carbon fibers, cyclodextrin, a silane coupling agent and water, filtering, taking a filter cake and drying to obtain modified carbon fibers;
2) carrying out hydrothermal reaction on modified carbon fibers, silver salt, zinc salt, urea and water, filtering to obtain a filter cake, and finally calcining in the presence of protective gas to obtain composite carbon fibers;
3) and mixing the composite carbon fiber, shell powder, attapulgite, silicon carbide and rare earth oxide to prepare the modified composition of the corrosion-resistant sealing ring.
The invention also provides a modified composition of the corrosion-resistant sealing ring, which is prepared by the preparation method.
According to the technical scheme, the cyclodextrin coating layer is formed on the surface of the carbon fiber through the silane coupling agent, then the nano-silver, nano-zinc or nano-silver-zinc composite material is formed on the surface of the cyclodextrin coating layer through hydrothermal reaction to obtain the composite carbon fiber, and finally the corrosion resistance of the sealing ring can be improved through the combination of the composite carbon fiber, shell powder, attapulgite, silicon carbide and rare earth oxide; meanwhile, the preparation method has the advantages of simple process and easily obtained raw materials.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The invention provides a preparation method of a modified composition of a corrosion-resistant sealing ring, which comprises the following steps:
1) carrying out contact reaction on carbon fibers, cyclodextrin, a silane coupling agent and water, filtering, taking a filter cake and drying to obtain modified carbon fibers;
2) carrying out hydrothermal reaction on modified carbon fibers, silver salt, zinc salt, urea and water, filtering to obtain a filter cake, and finally calcining in the presence of protective gas to obtain composite carbon fibers;
3) and mixing the composite carbon fiber, shell powder, attapulgite, silicon carbide and rare earth oxide to prepare the modified composition of the corrosion-resistant sealing ring.
In step 1) of the present invention, the amount of each material may be selected within a wide range, but in order for the modified composition to further improve the corrosion resistance of the seal ring, it is preferable that in step 1), the weight ratio of the carbon fiber, the cyclodextrin, the silane coupling agent and water is 30: 10-15: 5-10: 80-150.
In step 1) of the present invention, the conditions of the contact reaction can be selected within a wide range, but in order for the modifying composition to be able to further improve the corrosion resistance of the seal ring, in step 1), the contact reaction satisfies the following conditions: the reaction temperature is 65-80 ℃, and the reaction time is 3-5 h.
In step 1) of the present invention, the conditions for drying may be selected within a wide range, but in order for the modifying composition to be able to further improve the corrosion resistance of the seal ring, it is preferable that in step 1), the drying satisfies the following conditions: the drying temperature is 100-120 ℃, and the drying time is 4-6 h.
In step 2) of the present invention, the amount of each material may be selected within a wide range, but in order to enable the modified composition to further improve the corrosion resistance of the seal ring, it is preferable that in step 2), the weight ratio of the modified carbon fiber, the silver salt, the zinc salt, urea and water is 50: 5-8: 10-15: 15-20: 200-300.
In step 2) of the present invention, the conditions of the hydrothermal reaction can be selected within a wide range, but in order for the modifying composition to be able to further improve the corrosion resistance of the seal ring, it is preferable that in step 2), the hydrothermal reaction satisfies the following conditions: the reaction temperature is 160 ℃ and 180 ℃, and the reaction time is 8-16 h.
In step 2) of the present invention, the conditions of calcination may be selected within a wide range, but in order for the modifying composition to be able to further improve the corrosion resistance of the seal ring, it is preferable that in step 2), the calcination satisfies the following conditions: heating from 15-30 ℃ at 4.5-5 ℃/min to 350-400 ℃ and preserving heat for 30-50min, then cooling to 200-280 ℃ at 1.5-2 ℃/min and preserving heat for 1.5-2h, and finally naturally cooling to 15-30 ℃.
In step 3) of the present invention, the amount of each material may be selected within a wide range, but in order to enable the modified composition to further improve the corrosion resistance of the seal ring, it is preferable that in step 3), the weight ratio of the composite carbon fiber, shell powder, attapulgite, silicon carbide, and rare earth oxide is 30: 10-16: 35-45: 6-10: 8-15.
In the present invention, the kind of the silane coupling agent may be selected within a wide range, but in order to enable the modified composition to further improve the corrosion resistance of the seal ring, it is preferable that the silane coupling agent is selected from at least one of vinyltriethoxysilane, vinyltrimethoxysilane, vinyltris (β -methoxyethoxy) silane).
In the present invention, the kind of silver salt can be selected within a wide range, but in order for the modified composition to further improve the corrosion resistance of the gasket, it is preferable that the silver salt is silver nitrate.
In the present invention, the kind of zinc salt may be selected within a wide range, but in order for the modified composition to further improve the corrosion resistance of the seal ring, it is preferable that the zinc salt is selected from at least one of zinc nitrate, zinc chloride and zinc sulfate.
In the present invention, the kind of the shielding gas may be selected within a wide range, but in order to enable the modified composition to further improve the corrosion resistance of the seal ring, it is preferable that the shielding gas is selected from at least one of helium, nitrogen, and argon.
The invention also provides a modified composition of the corrosion-resistant sealing ring, which is prepared by the preparation method.
The present invention will be described in detail below by way of examples.
Example 1
1) Carbon fibers, cyclodextrin, a silane coupling agent (vinyltriethoxysilane) and water were mixed in a ratio of 30: 13: 8: 100 (the reaction temperature is 70 ℃, the reaction time is 4 h), filtering, taking a filter cake, and drying (the drying temperature is 110 ℃, the drying time is 5 h) to obtain the modified carbon fiber;
2) mixing the modified carbon fiber, silver salt (silver nitrate), zinc salt (zinc nitrate), urea and water according to a ratio of 50: 7: 13: 18: 280 (the reaction temperature is 170 ℃, the reaction time is 12 h), then filtering to obtain a filter cake, and finally calcining in the presence of protective gas (helium) (the temperature is raised to 380 ℃ from 20 ℃ at 4.8 ℃/min and is kept for 40min, then the temperature is lowered to 260 ℃ at 1.8 ℃/min and is kept for 1.8h, and finally the temperature is naturally cooled to 18 ℃) to prepare the composite carbon fiber;
3) mixing composite carbon fiber, shell powder, attapulgite, silicon carbide and rare earth oxide (samarium oxide) according to the weight ratio of 30: 13: 40: 8: 12 to obtain a modified composition a1 for a corrosion-resistant sealing ring.
Example 2
1) Carbon fibers, cyclodextrin, a silane coupling agent (vinyltrimethoxysilane) and water were mixed in a ratio of 30: 10: 5: 80 (the reaction temperature is 65 ℃ and the reaction time is 5 h), filtering, taking a filter cake, and drying (the drying temperature is 100 ℃ and the drying time is 6 h) to obtain the modified carbon fiber;
2) mixing the modified carbon fiber, silver salt (silver nitrate), zinc salt (zinc chloride), urea and water according to a ratio of 50: 5: 10: 15: performing hydrothermal reaction at the weight ratio of 200 (the reaction temperature is 160 ℃, the reaction time is 16 h), filtering to obtain a filter cake, and finally calcining in the presence of protective gas (nitrogen) (heating from 15 ℃ to 350 ℃ at 4.5 ℃/min and preserving heat for 30min, cooling to 200 ℃ at 1.5 ℃/min and preserving heat for 1.5h, and finally naturally cooling to 15 ℃) to obtain the composite carbon fiber;
3) mixing composite carbon fiber, shell powder, attapulgite, silicon carbide and rare earth oxide (yttrium oxide) according to the weight ratio of 30: 10: 35: 6: 8 to obtain a modified composition a2 for a corrosion-resistant sealing ring.
Example 3
1) Carrying out contact reaction on carbon fiber, cyclodextrin, a silane coupling agent (vinyl tris (β -methoxyethoxy) silane)) and water according to the weight ratio of 30: 15: 10: 150 (the reaction temperature is 80 ℃, the reaction time is 3 h), filtering, taking a filter cake, and drying (the drying temperature is 120 ℃, the drying time is 4 h) to obtain modified carbon fiber;
2) mixing the modified carbon fiber, silver salt (silver nitrate), zinc salt (zinc sulfate), urea and water according to a ratio of 50: 8: 15: 20: 300 (reaction temperature is 180 ℃, reaction time is 8 h), filtering to obtain a filter cake, and finally calcining in the presence of protective gas (argon) (heating to 400 ℃ at 5 ℃/min from 30 ℃ and keeping the temperature for 50min, cooling to 280 ℃ at 2 ℃/min and keeping the temperature for 2h, and finally naturally cooling to 30 ℃) to obtain the composite carbon fiber;
3) mixing composite carbon fiber, shell powder, attapulgite, silicon carbide and rare earth oxide (dysprosium oxide) according to the weight ratio of 30: 16: 45: 10: 15 to obtain a modified composition a3 for a corrosion-resistant sealing ring.
Comparative example 1
Modified composition B1 was obtained by following the procedure of example 1, except that no cyclodextrin was used in step 1).
Comparative example 2
Modified composition B2 was prepared by following the procedure of example 1, except that no silver salt was used in step 2).
Comparative example 3
Modified composition B3 was obtained by following the procedure of example 1, except that no zinc salt was used in step 2).
Comparative example 4
Modified composition B4 was prepared by following the procedure of example 1, except that silver and zinc salts were not used in step 2).
Comparative example 5
The modified composition B5 was obtained by following the procedure of example 1, except that the calcination in step 2) was carried out at 350-400 ℃.
Comparative example 6
The preparation of modified composition B5 was carried out in accordance with the method of example 1, except that the calcination in step 2) was carried out at 200-280 ℃.
Application example 1
Styrene butadiene rubber, ethylene propylene diene monomer, fluororubber, talcum powder, zinc borate, white carbon black, white oil, aluminum hydroxide and the modified composition are mixed according to the weight ratio of 50: 26: 35: 20: 7: 6: 65: 16: 29 for 50min, and then carrying out extrusion molding to prepare the sealing ring; wherein the control group had no modifying composition added; then detecting the tensile strength 1 of the sealing ring according to GB/T1701-; specific results are shown in table 1; wherein, the change rate 1 is the change rate after acid liquor soaking, and the change rate 2 is the change rate after alkali liquor soaking.
TABLE 1
| Composition comprising a metal oxide and a metal oxide | Rate of change 1/%) | Rate of change 2/%) |
| A1 | 2.8 | 1.9 |
| A2 | 3.1 | 2.5 |
| A3 | 3.3 | 2.4 |
| Is free of | 17.9 | 16.8 |
| B1 | 8.7 | 9.6 |
| B2 | 4.5 | 4.0 |
| B3 | 3.9 | 4.3 |
| B4 | 10.6 | 9.2 |
| B5 | 6.5 | 5.7 |
| B6 | 7.3 | 4.9 |
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (7)
1. A preparation method of a modified composition of a corrosion-resistant sealing ring is characterized by comprising the following steps: 1) Carrying out contact reaction on carbon fibers, cyclodextrin, a silane coupling agent and water, filtering, taking a filter cake and drying to obtain modified carbon fibers; 2) Carrying out hydrothermal reaction on the modified carbon fiber, silver salt, zinc salt, urea and water, filtering to obtain a filter cake, and finally calcining in the presence of protective gas to obtain the composite carbon fiber; 3) Mixing the composite carbon fiber, shell powder, attapulgite, silicon carbide and rare earth oxide to prepare a modified composition of the corrosion-resistant sealing ring; in step 2), the calcination satisfies the following conditions: heating from 15-30 ℃ at 4.5-5 ℃/min to 350-400 ℃ and preserving heat for 30-50min, then cooling to 200-280 ℃ at 1.5-2 ℃/min and preserving heat for 1.5-2h, and finally naturally cooling to 15-30 ℃.
2. The production method according to claim 1, wherein in step 1), the weight ratio of the carbon fibers, the cyclodextrin, the silane coupling agent, and the water is 30: 10-15: 5-10: 80-150.
3. The production method according to claim 1, wherein, in step 1), the contact reaction satisfies the following condition: the reaction temperature is 65-80 ℃, and the reaction time is 3-5 h.
4. The production method according to claim 1, wherein, in step 1), the drying satisfies the following condition: the drying temperature is 100-120 ℃, and the drying time is 4-6 h.
5. The production method according to claim 1, wherein in step 2), the weight ratio of the modified carbon fiber, the silver salt, the zinc salt, the urea, and the water is 50: 5-8: 10-15: 15-20: 200-300.
6. The production method according to claim 1, wherein, in step 2), the hydrothermal reaction satisfies the following condition: the reaction temperature is 160 ℃ and 180 ℃, and the reaction time is 8-16 h.
7. The production method according to claim 1, wherein in step 3), the weight ratio of the composite carbon fiber, shell powder, attapulgite, silicon carbide, and rare earth oxide is 30: 10-16: 35-45: 6-10: 8-15.
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| CN105906999A (en) * | 2016-06-20 | 2016-08-31 | 安徽荣达阀门有限公司 | Corundum-filled carbon nano-teflon valve sealing ring |
| CN106084730A (en) * | 2016-06-28 | 2016-11-09 | 东台市华阳玻纤有限责任公司 | A kind of carbon fiber wrapping-sealing gasket and preparation method thereof |
| CN107501652A (en) * | 2017-08-31 | 2017-12-22 | 宁国市宁和密封件厂 | A kind of motorcycle cold resistant rubber seal |
| CN107513192A (en) * | 2017-08-16 | 2017-12-26 | 宝钢发展有限公司 | A kind of leak-stopping sealant and preparation method thereof |
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| WO2014126240A1 (en) * | 2013-02-18 | 2014-08-21 | イーグル工業株式会社 | Lip seal for water pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105906999A (en) * | 2016-06-20 | 2016-08-31 | 安徽荣达阀门有限公司 | Corundum-filled carbon nano-teflon valve sealing ring |
| CN106084730A (en) * | 2016-06-28 | 2016-11-09 | 东台市华阳玻纤有限责任公司 | A kind of carbon fiber wrapping-sealing gasket and preparation method thereof |
| CN107513192A (en) * | 2017-08-16 | 2017-12-26 | 宝钢发展有限公司 | A kind of leak-stopping sealant and preparation method thereof |
| CN107501652A (en) * | 2017-08-31 | 2017-12-22 | 宁国市宁和密封件厂 | A kind of motorcycle cold resistant rubber seal |
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Denomination of invention: A modified composite of corrosion-resistant sealing rings and its preparation method Granted publication date: 20200612 Pledgee: Bank of Nanjing Co.,Ltd. Huai'an branch Pledgor: Boiling point sealing technology (Jiangsu) Co.,Ltd. Registration number: Y2024980024107 |