CN115260746A - Corrosion-resistant oil-resistant shore power cable sheath material and preparation method thereof - Google Patents
Corrosion-resistant oil-resistant shore power cable sheath material and preparation method thereof Download PDFInfo
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- 238000005260 corrosion Methods 0.000 title claims abstract description 55
- 230000007797 corrosion Effects 0.000 title claims abstract description 55
- 239000000463 material Substances 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000003921 oil Substances 0.000 claims description 35
- 235000019198 oils Nutrition 0.000 claims description 35
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims description 29
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 29
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 28
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 27
- 238000006243 chemical reaction Methods 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 21
- 239000012752 auxiliary agent Substances 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 16
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 15
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 15
- 229920000909 polytetrahydrofuran Polymers 0.000 claims description 15
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 12
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 10
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 10
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000006229 carbon black Substances 0.000 claims description 9
- 150000002009 diols Chemical class 0.000 claims description 9
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- -1 polytetrafluoroethylene Polymers 0.000 claims description 9
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 8
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 8
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 239000005543 nano-size silicon particle Substances 0.000 claims description 7
- 235000012239 silicon dioxide Nutrition 0.000 claims description 7
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 5
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 5
- 239000008158 vegetable oil Substances 0.000 claims description 5
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 4
- 238000001291 vacuum drying Methods 0.000 claims description 4
- 229920003051 synthetic elastomer Polymers 0.000 abstract description 2
- 239000005061 synthetic rubber Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 7
- 230000014759 maintenance of location Effects 0.000 description 7
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000002253 acid Substances 0.000 description 5
- 239000000295 fuel oil Substances 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 5
- 239000002480 mineral oil Substances 0.000 description 4
- 235000010446 mineral oil Nutrition 0.000 description 4
- 229920002379 silicone rubber Polymers 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 239000010721 machine oil Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000006408 oxalic acid Nutrition 0.000 description 2
- 239000012744 reinforcing agent Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000012644 addition polymerization Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
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- 125000003545 alkoxy group Chemical group 0.000 description 1
- 239000002585 base Substances 0.000 description 1
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- 238000002242 deionisation method Methods 0.000 description 1
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Classifications
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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
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
- C08L75/08—Polyurethanes from polyethers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
- C08G18/3802—Low-molecular-weight compounds having heteroatoms other than oxygen having halogens
- C08G18/3814—Polyamines
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
- C08G18/6685—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3225 or polyamines of C08G18/38
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Abstract
The invention relates to a corrosion-resistant oil-resistant shore power cable sheath material and a preparation method thereof, and belongs to the technical field of synthetic rubber.
Description
Technical Field
The invention belongs to the technical field of synthetic rubber, and particularly relates to a corrosion-resistant oil-resistant shore power cable sheath material and a preparation method thereof.
Background
The shore power cable is a cable for connecting a shore power box of a ship with a shore power supply or other ship power supplies, various oil liquids (such as fuel oil and the like) and corrosive liquids are often filled in ship cabins and offshore coastal areas for storing and using the shore power cable, a cable sheath layer made of common silicon rubber is easy to corrode and destroy, and after the silicon rubber is contacted with oil stains and corroded, the silicon rubber can swell to cause great reduction in the tensile strength, the insulating property and the wear resistance of the silicon rubber, so that the ship is unstable in operation and even causes safety accidents.
With the rapid development of modern industry in China, the requirements of shore power cables on corrosion resistance, oil resistance and mechanical properties are higher and higher, so that how to prepare a cable sheath material with excellent corrosion resistance and oil resistance becomes a technical problem to be solved urgently at present.
Disclosure of Invention
In order to solve the technical problems mentioned in the background art, the invention aims to provide a corrosion-resistant oil-resistant shore power cable sheath material and a preparation method thereof.
The purpose of the invention can be realized by the following technical scheme:
a preparation method of a corrosion-resistant oil-resistant shore power cable sheath material comprises the following steps:
the method comprises the following steps: drying the modified thermoplastic polyurethane, the ethylene-vinyl acetate copolymer and the maleic anhydride at the temperature of 8O ℃ for 6h, adding the dried materials into a high-speed mixer, adding the white carbon black and the flexibilizer, mixing and stirring the materials at the temperature of 60 ℃ for 30-60min to obtain a mixture, putting the mixture into a double-screw extruder, setting the extrusion temperature to be 170-210 ℃, and extruding and cooling the mixture to obtain the corrosion-resistant oil-resistant shore power cable sheath material.
In the reaction, the modified thermoplastic polyurethane is mixed with the ethylene-vinyl acetate copolymer by a melt blending method, and maleic anhydride is used as an interfacial compatilizer; white carbon black is used as a reinforcing agent and a bonding agent; and the mechanical oil and the vegetable oil are used as flexibilizers to prepare the corrosion-resistant oil-resistant shore power cable sheath material.
Further, the modified thermoplastic polyurethane is made by the steps of:
step B1: drying polytetrahydrofuran glycol, introducing into a reaction kettle, introducing nitrogen, adding diphenylmethane diisocyanate, heating to 80 ℃, stirring for reaction for 2 hours, adding 1, 4-butanediol and 3, 3-dichloro-4, 4' -diaminodiphenylmethane, heating to 90 ℃, stirring for reaction for 0.5-1 hour, adding dibutyltin dilaurate, triethylamine, polytetrafluoroethylene micro powder, corrosion-resistant auxiliary agent and deionized water, heating to 150-170 ℃, stirring for reaction for 10-15 minutes, and carrying out vacuum defoaming to obtain an intermediate;
and step B2: preheating a mould to 70-80 ℃, adding the intermediate into the mould, standing for 2min at 80 ℃, curing for 16h at 100 ℃ after demoulding, and standing for 48-72h at room temperature to obtain the modified thermoplastic polyurethane.
In the reaction, the polytetrahydrofuran diol and the diphenylmethane diisocyanate are subjected to stepwise addition polymerization to prepare thermoplastic polyurethane, 1, 4-butanediol and 3, 3-dichloro-4, 4' -diaminodiphenylmethane are used as extended links for prolonging molecular chains and increasing molecular weight, linear macromolecules are facilitated to be formed, the balance relationship between a gelling reaction and a foaming reaction is adjusted by using dibutyltin dilaurate and triethylamine, and the dibutyltin dilaurate can promote the reaction of the polytetrahydrofuran diol and the diphenylmethane diisocyanate and assist in improving the molecular weight and viscosity of the polymer; the triethylamine can promote the reaction of the deionized water and the diphenylmethane diisocyanate, and the triethylamine and the diphenylmethane diisocyanate are matched and used to have a synergistic effect, so that the physical properties of the modified thermoplastic polyurethane are ensured.
Further, the flexibilizer is one of vegetable oil and machine oil.
Further, the mass ratio of the modified thermoplastic polyurethane to the ethylene-vinyl acetate copolymer to the maleic anhydride to the white carbon black to the flexibilizer is 55-75:10-30:10:20:1-5.
Further, the content of vinyl acetate in the ethylene-vinyl acetate copolymer is 40%.
Further, the mass ratio of polytetrahydrofuran diol, diphenylmethane diisocyanate, 1, 4-butanediol, 3-dichloro-4, 4' -diaminodiphenylmethane, dibutyltin dilaurate, triethylamine, polytetrafluoroethylene micro powder, corrosion-resistant auxiliary agent and deionization is 70-110:30-40:20-30:20-30:2-5:2-5:10-20:10-20:8-10.
Further, the number average molecular weight of the polytetrahydrofuran diol is 1000. Too high a number average molecular weight of the polytetrahydrofuran diol can result in too low a hardness of the prepared modified thermoplastic polyurethane material, and too low a number average molecular weight can result in the prepared modified thermoplastic polyurethane material losing elasticity.
Further, the corrosion-resistant auxiliary agent is prepared by the following steps: adding nano silicon dioxide into deionized water, performing ultrasonic dispersion for 30-40min at the frequency of 20-25kHz, adding a silane coupling agent, stirring at the stirring speed of 120-150r/min for reaction for 8-10h to obtain a product, placing the product in a vacuum drying oven, controlling the drying temperature to be 50-55 ℃, and drying to obtain the corrosion-resistant auxiliary agent.
In the reaction, the silane coupling agent is used for modifying the nano-silica to prepare the corrosion-resistant auxiliary agent, the nano-silica has excellent corrosion resistance, alkoxy of the silane coupling agent is hydrolyzed into silicon hydroxyl and then condensed with the silicon hydroxyl on the surface of the nano-silica, and the surface of the nano-silica is grafted with a group containing amino, so that the adhesive force between the nano-silica and the thermoplastic polyurethane is improved.
Further, the corrosion-resistant oil-resistant shore power cable sheath material is prepared by the preparation method.
The invention has the beneficial effects that:
firstly, modified thermoplastic polyurethane and ethylene-vinyl acetate copolymer are mixed by a melt blending method, the ethylene-vinyl acetate copolymer has polar groups and has extremely strong oil corrosion resistance and acid corrosion resistance, meanwhile, maleic anhydride is added as an interface compatilizer, then, white carbon black is added as a reinforcing agent and an adhesive, the surface of the white carbon black has hydroxyl groups, the oil resistance of a sheath material can be improved in an auxiliary mode, and finally, mechanical oil and vegetable oil are added as flexibilizers, so that the prepared shore power cable sheath material has excellent oil resistance.
Then, the polytetrafluoroethylene micro powder is added in the process of preparing the modified thermoplastic polyurethane, the polytetrafluoroethylene micro powder has good chemical stability and corrosion resistance, meanwhile, the dispersibility of the polytetrafluoroethylene micro powder in a matrix material is excellent, the corrosion resistance of the thermoplastic polyurethane can be comprehensively enhanced, meanwhile, the corrosion-resistant auxiliary agent is also added in the process of modifying the thermoplastic polyurethane, the corrosion-resistant auxiliary agent is prepared from silane coupling agent modified nano silicon dioxide, the nano silicon dioxide has excellent corrosion resistance, and through the modification of the silane coupling agent, the adhesive force between the nano silicon dioxide and the thermoplastic polyurethane is improved, so that the corrosion resistance of the shore power cable sheath material is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Preparing a corrosion-resistant auxiliary agent:
adding nano silicon dioxide into deionized water, performing ultrasonic dispersion for 30min at the frequency of 20kHz, adding a silane coupling agent, stirring at the stirring speed of 120r/min for reaction for 8h to obtain a product, placing the product in a vacuum drying oven, controlling the drying temperature to be 50 ℃, and drying to obtain the corrosion-resistant auxiliary agent.
Example 2
Preparing a corrosion-resistant auxiliary agent:
adding nano silicon dioxide into deionized water, performing ultrasonic dispersion for 40min at the frequency of 25kHz, adding a silane coupling agent, stirring at the stirring speed of 150r/min for 10h to obtain a product, placing the product in a vacuum drying oven, controlling the drying temperature to be 55 ℃, and drying to obtain the corrosion-resistant auxiliary agent.
Example 3
Preparing modified thermoplastic polyurethane:
step B1: drying 70g of polytetrahydrofuran glycol, introducing the dried polytetrahydrofuran glycol into a reaction kettle, introducing nitrogen, adding 30g of diphenylmethane diisocyanate, heating to 80 ℃, stirring for reaction for 2 hours, adding 10g1, 4-butanediol and 20g3, 3-dichloro-4, 4' -diaminodiphenylmethane, heating to 90 ℃, stirring for reaction for 0.5 hour, adding 20g of dibutyltin dilaurate, 2g of triethylamine, 2g of polytetrafluoroethylene micropowder, 8g of the corrosion-resistant auxiliary prepared in example 1 and 10g of deionized water, heating to 150 ℃, stirring for reaction for 10 minutes, and carrying out vacuum defoaming to obtain an intermediate;
wherein the polytetrahydrofuran diol has a number average molecular weight of 1000;
and step B2: preheating a mould to 70 ℃, adding the intermediate into the mould, standing for 2min at 80 ℃, curing for 16h at 100 ℃ after demoulding, and standing for 48h at room temperature to obtain the modified thermoplastic polyurethane.
Example 4
Preparing modified thermoplastic polyurethane:
step B1: drying 110g of polytetrahydrofuran glycol, introducing the dried polytetrahydrofuran glycol into a reaction kettle, introducing nitrogen, adding 40g of diphenylmethane diisocyanate, heating to 80 ℃, stirring for reaction for 2 hours, adding 20g1, 4-butanediol and 30g3, 3-dichloro-4, 4' -diaminodiphenylmethane, heating to 90 ℃, stirring for reaction for 0.5 hour, adding 30g of dibutyltin dilaurate, 5g of triethylamine, 5g of polytetrafluoroethylene micropowder, 10g of the corrosion-resistant assistant prepared in example 2 and 20g of deionized water, heating to 150 ℃, stirring for reaction for 10 minutes, and carrying out vacuum deaeration to obtain an intermediate;
wherein the polytetrahydrofuran diol has a number average molecular weight of 1000;
and step B2: preheating a mould to 70 ℃, adding the intermediate into the mould, standing for 2min at 80 ℃, curing for 16h at 100 ℃ after demoulding, and standing for 48h at room temperature to obtain the modified thermoplastic polyurethane.
Example 5
Preparing a corrosion-resistant oil-resistant shore power cable sheath material:
taking 55g of the modified thermoplastic polyurethane prepared in the embodiment 3, 10g of the ethylene-vinyl acetate copolymer and 10g of maleic anhydride, drying the obtained product for 6 hours at the temperature of 8O ℃, adding the obtained product into a high-speed mixer, adding 20g of white carbon black and 1g of vegetable oil, mixing the obtained product for 30 minutes at the temperature of 60 ℃ to obtain a mixture, putting the mixture into a double-screw extruder, setting the extrusion temperature to be 170 ℃, and performing extrusion cooling to obtain a corrosion-resistant oil-resistant shore power cable sheath material;
wherein the content of vinyl acetate in the ethylene-vinyl acetate copolymer is 40%.
Example 6
Preparing a corrosion-resistant oil-resistant shore power cable sheath material:
taking 75g of the modified thermoplastic polyurethane prepared in the embodiment 4, 30g of ethylene-vinyl acetate copolymer and 10g of maleic anhydride, drying for 6 hours at the temperature of 8O ℃, adding into a high-speed mixer, adding 20g of white carbon black and 5g of machine oil, mixing for 60 minutes at the temperature of 60 ℃ to obtain a mixture, putting the mixture into a double-screw extruder, setting the extrusion temperature to be 210 ℃, and extruding and cooling to obtain the corrosion-resistant oil-resistant shore power cable sheath material;
wherein the content of vinyl acetate in the ethylene-vinyl acetate copolymer is 40%.
Comparative example 1
The modified thermoplastic polyurethane in example 5 is directly used as a corrosion-resistant oil-resistant shore power cable sheath material.
Comparative example 2
The corrosion-resistant auxiliary agent in the modified thermoplastic polyurethane in example 6 was removed, and the rest of the raw materials and the preparation process remained unchanged from example 6.
The corrosion-resistant oil-resistant shore power cable sheath materials prepared in examples 5-6 and comparative examples 1-2 are respectively subjected to the following performance tests:
hardness: measuring Shore hardness D, cutting the sheath material into 2cm multiplied by 2cm (the thickness is about 2 mm) samples, measuring the hardness of the samples by using a D-type Shore hardness tester, testing for three times or more and taking an average value to obtain the hardness of the samples;
according to the EN6008-2-1 test standard, the tensile strength and the retention rate of the elongation of the mineral oil resistance, the fuel oil resistance, the acid resistance and the alkali resistance of the sheath material are tested, and the specific test conditions are as follows:
mineral oil resistance (IRM 902) -tensile strength retention (100 ℃, 72H);
mineral oil resistance (IRM 902) — retention of elongation (100 ℃, 72H);
fuel oil resistance (IRM 903) -tensile strength retention (70 ℃, 168H);
fuel oil resistance (IRM 903) -elongation retention (70 ℃, 168H);
acid (oxalic acid) -resistant tensile strength retention (1N, 23 ℃, 168H);
acid-resistant (oxalic acid) -retention of elongation (1N, 23 ℃, 168H);
alkali (sodium hydroxide) -tensile strength retention (1N, 23 ℃, 168H);
alkali resistance (sodium hydroxide) -retention of elongation (1N, 23 ℃, 168H).
The test results are shown in table 1:
TABLE 1
From the data in table 1, the following conclusions can be drawn:
1) The mineral oil and fuel oil resistant data for comparative example 5 and comparative example 1 can be obtained: the modified thermoplastic polyurethane is mixed with the ethylene-vinyl acetate copolymer by a melt blending method, so that the oil resistance of the corrosion-resistant oil-resistant shore power cable sheath material is obviously improved;
2) The data for acid and base resistance for comparative example 6 and comparative example 2 can be obtained: the corrosion-resistant additive prepared by the invention is added, so that the corrosion resistance of the corrosion-resistant oil-resistant shore power cable sheath material is improved.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only, and it will be appreciated by those skilled in the art that various modifications, additions and substitutions can be made to the embodiments described without departing from the scope of the invention as defined in the appended claims.
Claims (8)
1. A preparation method of a corrosion-resistant oil-resistant shore power cable sheath material is characterized by comprising the following steps: the method comprises the following steps: drying the modified thermoplastic polyurethane, the ethylene-vinyl acetate copolymer and the maleic anhydride, adding the dried modified thermoplastic polyurethane, the ethylene-vinyl acetate copolymer and the maleic anhydride into a high-speed mixer, adding the white carbon black and the flexibilizer, mixing and stirring for 30-60min at the temperature of 60 ℃ to obtain a mixture, putting the mixture into a double-screw extruder, setting the extrusion temperature to be 170-210 ℃, and extruding and cooling to obtain the corrosion-resistant oil-resistant shore power cable sheath material;
the modified thermoplastic polyurethane is prepared by the following steps:
step B1: drying polytetrahydrofuran glycol, introducing into a reaction kettle, introducing nitrogen, adding diphenylmethane diisocyanate, heating to 80 ℃, stirring for reacting for 2 hours, adding 1, 4-butanediol and 3, 3-dichloro-4, 4' -diaminodiphenylmethane, heating to 90 ℃, adding dibutyltin dilaurate, triethylamine, polytetrafluoroethylene micropowder, a corrosion-resistant auxiliary agent and deionized water, continuing heating to 150-170 ℃, stirring for reacting for 10-15min, and carrying out vacuum defoaming to obtain an intermediate;
and step B2: preheating a mould to 70-80 ℃, adding the intermediate into the mould, standing for 2min at 80 ℃, curing for 16h at 100 ℃ after demoulding, and standing for 48-72h at room temperature to obtain the modified thermoplastic polyurethane.
2. The preparation method of the corrosion-resistant oil-resistant shore power cable sheath material according to claim 1, wherein the preparation method comprises the following steps: the flexibilizer is one of vegetable oil and mechanical oil.
3. The preparation method of the corrosion-resistant oil-resistant shore power cable sheath material according to claim 1, wherein the preparation method comprises the following steps: the mass ratio of the modified thermoplastic polyurethane to the ethylene-vinyl acetate copolymer to the maleic anhydride to the white carbon black to the flexibilizer is 55-75:10-30:10:20:1-5.
4. The preparation method of the corrosion-resistant oil-resistant shore power cable sheath material according to claim 1, wherein the preparation method comprises the following steps: the content of vinyl acetate in the ethylene-vinyl acetate copolymer is 40%.
5. The preparation method of the corrosion-resistant oil-resistant shore power cable sheath material according to claim 1, wherein the preparation method comprises the following steps: the mass ratio of the polytetrahydrofuran diol to the diphenylmethane diisocyanate to the polytetrafluoroethylene micro powder to the 1, 4-butanediol to the 3, 3-dichloro-4, 4' -diaminodiphenylmethane to the dibutyltin dilaurate to the triethylamine to the deionized water to the corrosion-resistant auxiliary agent is 70-110:30-40:10-20:20-30:20-30:2-5:2-5:8-10:10-20.
6. The preparation method of the corrosion-resistant oil-resistant shore power cable sheath material according to claim 1, wherein the preparation method comprises the following steps: the polytetrahydrofuran diol has a number average molecular weight of 1000.
7. The preparation method of the corrosion-resistant oil-resistant shore power cable sheath material according to claim 1, wherein the preparation method comprises the following steps: the corrosion-resistant auxiliary agent is prepared by the following steps:
adding nano silicon dioxide into deionized water, performing ultrasonic dispersion for 30-40min, adding a silane coupling agent, stirring at a stirring speed of 120-150r/min for reaction for 8-10h to obtain a product, placing the product in a vacuum drying oven, controlling the drying temperature to be 50-55 ℃, and drying to obtain the corrosion-resistant auxiliary agent.
8. A corrosion-resistant oil-resistant shore power cable sheath material, which is prepared by the preparation method of any one of claims 1 to 7.
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