CN118047990A - Impact corrosion resistant polyethylene pipe and preparation method thereof - Google Patents
Impact corrosion resistant polyethylene pipe and preparation method thereof Download PDFInfo
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- CN118047990A CN118047990A CN202410284266.7A CN202410284266A CN118047990A CN 118047990 A CN118047990 A CN 118047990A CN 202410284266 A CN202410284266 A CN 202410284266A CN 118047990 A CN118047990 A CN 118047990A
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- 238000005260 corrosion Methods 0.000 title claims abstract description 60
- 230000007797 corrosion Effects 0.000 title claims abstract description 59
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 50
- -1 polyethylene Polymers 0.000 title claims abstract description 49
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 62
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 25
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000002253 acid Substances 0.000 claims abstract description 18
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229920006337 unsaturated polyester resin Polymers 0.000 claims abstract description 16
- REYJJPSVUYRZGE-UHFFFAOYSA-N Octadecylamine Chemical compound CCCCCCCCCCCCCCCCCCN REYJJPSVUYRZGE-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims abstract description 15
- 239000003365 glass fiber Substances 0.000 claims abstract description 11
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 11
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 11
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 10
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 10
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 57
- 238000010438 heat treatment Methods 0.000 claims description 30
- 238000006243 chemical reaction Methods 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 15
- 238000005406 washing Methods 0.000 claims description 15
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 claims description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 claims description 14
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 14
- 239000008367 deionised water Substances 0.000 claims description 12
- 229910021641 deionized water Inorganic materials 0.000 claims description 12
- 239000012286 potassium permanganate Substances 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 7
- 229910017604 nitric acid Inorganic materials 0.000 claims description 7
- 235000010344 sodium nitrate Nutrition 0.000 claims description 7
- 239000004317 sodium nitrate Substances 0.000 claims description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 239000005457 ice water Substances 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 229910021645 metal ion Inorganic materials 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 238000009210 therapy by ultrasound Methods 0.000 claims description 5
- 238000001291 vacuum drying Methods 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 229920013716 polyethylene resin Polymers 0.000 abstract description 8
- 230000009471 action Effects 0.000 abstract description 6
- 229920000642 polymer Polymers 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 239000003513 alkali Substances 0.000 abstract description 3
- 239000002585 base Substances 0.000 abstract description 3
- 239000002086 nanomaterial Substances 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract description 2
- 230000003075 superhydrophobic effect Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 6
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- 238000005411 Van der Waals force Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012767 functional filler Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention discloses an impact corrosion resistant polyethylene pipe and a preparation method thereof, belonging to the technical field of high polymer pipes, and comprising the following raw materials: high-density polyethylene, corrosion-resistant auxiliary agents, hydrophobic modified graphene oxide, silicon dioxide, ABS resin and glass fibers. The invention takes high-density polyethylene and ABS resin as base materials, enhances the stability and durability of the micro-nano structure on the surface of the polyethylene by grafting and modifying the graphene oxide with octadecylamine, endows the polyethylene resin with super-hydrophobic property, and simultaneously can be uniformly mixed with the ABS resin and the polyethylene resin by grafting maleic anhydride on the unsaturated polyester resin in the corrosion-resistant auxiliary agent, thereby effectively preventing corrosion of corrosive mediums such as acid, alkali and the like and improving the corrosion resistance of the polyethylene pipe; the silicon dioxide and the glass fiber are added into the polyethylene pipe and are connected with the polymer molecular chains through interface action to form a three-dimensional net structure, so that the shock resistance of the polyethylene pipe is improved.
Description
Technical Field
The invention belongs to the technical field of high polymer pipes, and particularly relates to an impact corrosion resistant polyethylene pipe and a preparation method thereof.
Background
Polyethylene is one of the most widely used polymer materials at present, but in the process of forming and using, polyethylene is easily affected by external forces such as stretching, bending, impact and the like, so that the polyethylene pipe is broken. Some plastic pipes, such as tap water pipes and gas pipes, tend to have high humidity, and thus pipe materials are required to have good corrosion resistance, high temperature resistance and weather resistance. Meanwhile, in the projects of long-distance petroleum transportation, agricultural irrigation and the like, the pipeline can be contacted with various corrosive products, such as the breakage of a polymer chain is easily caused under corrosive media such as acid, alkali, oil and the like, so that the corrosion phenomenon is caused, and the service life of the polyethylene pipe is greatly reduced. Therefore, the impact resistance and corrosion resistance of the polyethylene pipe need to be improved, and the requirements of the market on the polyethylene pipe are met.
In the prior art, graphene oxide is often used as a functional filler for modifying a polyethylene pipe, and the graphene oxide can effectively block some corrosive mediums due to a special two-dimensional structure of the graphene oxide, so that the invasion path of the corrosive mediums to the polyethylene pipe is effectively prolonged. However, due to the van der Waals force between graphene oxide layers, the graphene oxide is easy to agglomerate in the preparation process of the polyethylene pipe, is not easy to disperse, and limits the application of the graphene oxide in the corrosion-resistant field of the polyethylene pipe, so that how to prepare the impact-corrosion-resistant polyethylene pipe is a technical problem to be solved at present.
Disclosure of Invention
The invention aims to provide an impact corrosion resistant polyethylene pipe and a preparation method thereof, which are used for solving the problems in the background technology.
The aim of the invention can be achieved by the following technical scheme:
the impact corrosion resistant polyethylene pipe comprises the following raw materials in parts by weight: 80-110 parts of high-density polyethylene, 3-9 parts of corrosion-resistant auxiliary agent, 4-6 parts of hydrophobically modified graphene oxide, 1-3 parts of silicon dioxide, 5-7 parts of ABS resin and 3-6 parts of glass fiber.
Further, the hydrophobically modified graphene oxide is prepared by the steps of:
A1, placing graphite powder and sodium nitrate into a three-neck flask, adding concentrated nitric acid under the condition of ice water bath for reaction for 1h, adding potassium permanganate for reaction for 2h after the temperature of the system is reduced to 20 ℃, then heating to 40-50 ℃, adding deionized water after reaction for 40min, heating to 90 ℃ for reaction for 1h, and carrying out aftertreatment to obtain graphene oxide;
and A2, adding graphene oxide and octadecylamine into ethanol, performing ultrasonic treatment for 2 hours, centrifuging at 6000rpm, washing, removing redundant octadecylamine, and performing vacuum drying at 130 ℃ for 3 hours to obtain the hydrophobically modified graphene oxide.
Further, the dosage ratio of the graphite powder, the sodium nitrate, the concentrated nitric acid, the potassium permanganate and the deionized water is 1-3g:1-2g:100-120mL:5-7g:120-140mL.
Further, the dosage ratio of the graphene oxide, the octadecylamine and the ethanol is 2-3g:8-11g:120-135mL.
Further, the post-treatment is to drop 150mL of 30wt% hydrogen peroxide into the system to remove potassium permanganate in the system, and to carry out acid washing and water washing with 120mL of 5wt% diluted hydrochloric acid and deionized water to remove metal ions and impurities, and then to carry out drying.
Further, the corrosion-resistant auxiliary agent is prepared by the following steps:
B1, heating propylene glycol to 140-150 ℃, adding isophthalic acid, introducing nitrogen, heating to 200 ℃, cooling to 150-170 ℃ when the acid value of the system is less than 19mg/g, adding maleic anhydride, heating to 220-240 ℃, reacting for 2 hours, vacuumizing and dehydrating until the acid value of the system is less than 38mg/g, stopping vacuumizing, cooling to 210 ℃, adding divinylbenzene, and stirring for 1 hour to obtain unsaturated polyester resin;
And B2, adding unsaturated polyester resin and maleic anhydride into propylene glycol, heating to 140-150 ℃ for reaction for 2 hours, cooling to room temperature, adding active carbon, removing excessive propylene glycol, and filtering to obtain the corrosion-resistant auxiliary agent.
Further, the volume ratio of the propylene glycol, the isophthalic acid, the maleic anhydride and the divinylbenzene is 6:2-3:3-4:3-4.
Further, the volume ratio of the unsaturated polyester resin, the maleic anhydride and the propylene glycol is 4-5:1-2:4-5.
A preparation method of an impact corrosion resistant polyethylene pipe comprises the following steps:
Adding high-density polyethylene, corrosion-resistant auxiliary agent, hydrophobic modified graphene oxide, silicon dioxide, ABS resin and glass fiber into a high-speed mixer, stirring and mixing, then adding into a hopper of an extruder, and extruding and forming at 190 ℃ to obtain the impact corrosion-resistant polyethylene pipe.
The invention has the beneficial effects that:
According to the invention, through grafting modification of the octadecylamine on the graphene oxide, a large amount of octadecylamine is grafted on the surface of the graphene oxide to provide hydrophobic alkyl chains for the graphene oxide, so that the aggregation phenomenon of the graphene oxide is improved, the dispersibility of the graphene oxide in polyethylene and ABS resin is improved, meanwhile, the octadecylamine migrates to the surface of the polyethylene resin, and strong interface combination is formed through chemical action and physical entanglement, so that the micro-nano structure of the surface of the polyethylene resin is stable and durable, and the low surface energy modification of long-chain alkane is combined, so that the super-hydrophobic performance of the polyethylene resin is endowed, and the chemical corrosion resistance of the polyethylene pipe is improved.
The maleic anhydride is grafted on the unsaturated polyester resin in the corrosion-resistant auxiliary agent, so that the compatibility of the unsaturated polyester resin with the ABS resin and the polyethylene resin is improved, meanwhile, the unsaturated polyester resin forms a layer of barrier layer on the surfaces of the ABS resin and the polyethylene base material, corrosion of corrosive mediums such as acid, alkali and the like on the polyethylene pipe is effectively prevented, the corrosion-resistant auxiliary agent can be uniformly mixed with the ABS resin and the polyethylene resin, and meanwhile, the corrosion resistance of the polyethylene pipe can also be improved.
The silicon dioxide and the glass fiber are added into the polyethylene pipe and are connected with the polymer molecular chains through interface action to form a three-dimensional net structure, so that the impact strength of the polyethylene pipe is improved.
According to the invention, high-density polyethylene and ABS resin are used as resin base materials, and the shock resistance and corrosion resistance of the polyethylene pipe are enhanced through the introduction of the hydrophobically modified graphene oxide, the corrosion resistance auxiliary agent and the silicon dioxide and the glass fiber.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.
Example 1
The embodiment provides a hydrophobic modified graphene oxide, which is prepared by the following steps:
a1, placing 1g of graphite powder and 1g of sodium nitrate into a three-neck flask, adding 100mL of concentrated nitric acid under the condition of ice water bath for reaction for 1h, adding 5g of potassium permanganate for reaction for 2h after the temperature of the system is reduced to 20 ℃, then heating to 40 ℃, adding 120mL of deionized water after the reaction is carried out for 40min, then heating to 90 ℃ for reaction for 1h, dropwise adding 150mL of 30wt% hydrogen peroxide into the system after the reaction is completed, removing potassium permanganate in the system, carrying out acid washing and water washing by using 120mL of 5wt% dilute hydrochloric acid and deionized water, removing metal ions and impurities, and then drying to obtain graphene oxide;
And A2, adding 2g of graphene oxide and 8g of octadecylamine into 120mL of ethanol, performing ultrasonic treatment for 2h, centrifuging at 6000rpm, washing, removing the redundant octadecylamine, and performing vacuum drying at 130 ℃ for 3h to obtain the hydrophobically modified graphene oxide.
Example 2
The embodiment provides a hydrophobic modified graphene oxide, which is prepared by the following steps:
A1, placing 2g of graphite powder and 1.5g of sodium nitrate into a three-neck flask, adding 115mL of concentrated nitric acid under the condition of ice water bath for reaction for 1h, adding 6g of potassium permanganate for reaction for 2h after the temperature of the system is reduced to 20 ℃, then heating to 45 ℃, adding 130mL of deionized water after the reaction is carried out for 40min, heating to 90 ℃ for reaction for 1h, dropwise adding 150mL of 30wt% hydrogen peroxide into the system after the reaction is completed, removing potassium permanganate in the system, carrying out acid washing and water washing by using 120mL of 5wt% dilute hydrochloric acid and deionized water, removing metal ions and impurities, and drying to obtain graphene oxide;
A2, adding 2.5g of graphene oxide and 10g of octadecylamine into 130mL of ethanol, carrying out ultrasonic treatment for 2h, centrifuging at 6000rpm, washing to remove the redundant octadecylamine, and then carrying out vacuum drying at 130 ℃ for 3h to obtain the hydrophobically modified graphene oxide.
Example 3
The embodiment provides a hydrophobic modified graphene oxide, which is prepared by the following steps:
A1, placing 3g of graphite powder and 2g of sodium nitrate into a three-neck flask, adding 120mL of concentrated nitric acid under the condition of ice water bath for reaction for 1h, adding 7g of potassium permanganate for reaction for 2h after the temperature of the system is reduced to 20 ℃, then heating to 50 ℃, adding 140mL of deionized water after reaction for 40min, then heating to 90 ℃ for reaction for 1h, dropwise adding 150mL of 30wt% hydrogen peroxide into the system after the reaction is completed, removing potassium permanganate in the system, carrying out acid washing and water washing with 120mL of 5wt% of dilute hydrochloric acid and deionized water, removing metal ions and impurities, and drying to obtain graphene oxide;
And A2, adding 3g of graphene oxide and 11g of octadecylamine into 135mL of ethanol, performing ultrasonic treatment for 2h, centrifuging at 6000rpm, washing, removing the redundant octadecylamine, and performing vacuum drying at 130 ℃ for 3h to obtain the hydrophobically modified graphene oxide.
Example 4
The embodiment provides a corrosion-resistant auxiliary agent, which is prepared by the following steps:
B1, heating 120mL of propylene glycol to 140 ℃, adding 40mL of isophthalic acid, introducing nitrogen, heating to 200 ℃, cooling to 150 ℃ when the acid value of the system is less than 19mg/g, adding 60mL of maleic anhydride, heating to 220 ℃, reacting for 2 hours, vacuumizing and dehydrating until the acid value of the system is less than 38mg/g, stopping vacuumizing, cooling to 210 ℃, adding 60mL of divinylbenzene, and stirring for 1 hour to obtain unsaturated polyester resin;
and B2, adding 120mL of unsaturated polyester resin and 30mL of maleic anhydride into 120mL of propylene glycol, heating to 140 ℃ for reaction for 2h, cooling to room temperature, adding activated carbon, removing excessive propylene glycol, and filtering to obtain the corrosion-resistant auxiliary agent.
Example 5
The embodiment provides a corrosion-resistant auxiliary agent, which is prepared by the following steps:
b1, heating 120mL of propylene glycol to 145 ℃, adding 50mL of isophthalic acid, introducing nitrogen, heating to 200 ℃, cooling to 160 ℃ when the acid value of the system is less than 19mg/g, adding 70mL of maleic anhydride, heating to 230 ℃, reacting for 2 hours, vacuumizing and dehydrating until the acid value of the system is less than 38mg/g, stopping vacuumizing, cooling to 210 ℃, adding 70mL of divinylbenzene, and stirring for 1 hour to obtain unsaturated polyester resin;
And B2, adding 135mL of unsaturated polyester resin and 45mL of maleic anhydride into 135mL of propylene glycol, heating to 145 ℃ for reaction for 2 hours, cooling to room temperature, adding activated carbon, removing excessive propylene glycol, and filtering to obtain the corrosion-resistant auxiliary agent.
Example 6
The embodiment provides a corrosion-resistant auxiliary agent, which is prepared by the following steps:
b1, heating 120mL of propylene glycol to 150 ℃, adding 60mL of isophthalic acid, introducing nitrogen, heating to 200 ℃, cooling to 170 ℃ when the acid value of the system is less than 19mg/g, adding 80mL of maleic anhydride, heating to 240 ℃, reacting for 2 hours, vacuumizing and dehydrating until the acid value of the system is less than 38mg/g, stopping vacuumizing, cooling to 210 ℃, adding 80mL of divinylbenzene, and stirring for 1 hour to obtain unsaturated polyester resin;
and B2, adding 150mL of unsaturated polyester resin and 60mL of maleic anhydride into 150mL of propylene glycol, heating to 150 ℃ for reaction for 2 hours, cooling to room temperature, adding activated carbon, removing excessive propylene glycol, and filtering to obtain the corrosion-resistant auxiliary agent.
Example 7
An impact corrosion resistant polyethylene pipe is prepared by the following steps:
80 parts by weight of high-density polyethylene, 3 parts by weight of the corrosion-resistant auxiliary agent prepared in example 4, 4 parts by weight of the hydrophobically modified graphene oxide prepared in example 1, 1 part by weight of silicon dioxide, 5 parts by weight of ABS resin and 3 parts by weight of glass fiber are added into a high-speed mixer for stirring and mixing, then added into a hopper of an extruder, and extruded and molded at the temperature of 190 ℃ to obtain the impact-resistant corrosion-resistant polyethylene pipe.
Example 8
An impact corrosion resistant polyethylene pipe is prepared by the following steps:
100 parts by weight of high-density polyethylene, 6 parts by weight of the corrosion-resistant auxiliary agent prepared in example 4, 5 parts by weight of the hydrophobically modified graphene oxide prepared in example 1, 2 parts by weight of silicon dioxide, 6 parts by weight of ABS resin and 5 parts by weight of glass fiber are added into a high-speed mixer for stirring and mixing, then added into a hopper of an extruder, and extruded and molded at the temperature of 190 ℃ to obtain the impact-resistant corrosion-resistant polyethylene pipe.
Example 9
An impact corrosion resistant polyethylene pipe is prepared by the following steps:
110 parts by weight of high-density polyethylene, 9 parts by weight of the corrosion-resistant auxiliary agent prepared in example 4, 6 parts by weight of the hydrophobically modified graphene oxide prepared in example 1,3 parts by weight of silicon dioxide, 7 parts by weight of ABS resin and 6 parts by weight of glass fiber are added into a high-speed mixer for stirring and mixing, then added into a hopper of an extruder, and extruded and molded at the temperature of 190 ℃ to obtain the impact-resistant corrosion-resistant polyethylene pipe.
Comparative example 1:
The hydrophobically modified graphene oxide was removed as compared to example 7, the remainder being the same.
Comparative example 2:
the corrosion-resistant auxiliary was removed as compared with example 7, the remainder being the same.
Comparative example 3:
Preparation of an impact corrosion resistant polyethylene pipe:
the hydrophobically modified graphene oxide was replaced with graphene oxide as compared to example 8, the remainder being the same.
Performance tests were performed on examples 7-9 and comparative examples 1-3, tensile properties: impact strength according to national standard GB/T4498-2007: the polyethylene pipes produced in examples 7 to 9 and comparative examples 1 to 3 were immersed in a 3.5wt% HCl solution and a carbon tetrachloride solution for 24 hours according to GB/T15142-2001, and the results are shown in Table 1:
TABLE 1
As can be seen from Table 1, the polyethylene pipes prepared from the hydrophobically modified graphene oxide and the corrosion-resistant auxiliary agent in examples 7 to 9 have no cracks and functional group breakage, have good corrosion resistance, have impact strength as high as 74kJ/m 2, and are obviously superior to the polyethylene pipes prepared from comparative examples 1 to 3, and have good impact resistance.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The impact corrosion resistant polyethylene pipe is characterized by comprising the following raw materials in parts by weight:
80-110 parts of high-density polyethylene, 3-9 parts of corrosion-resistant auxiliary agent, 4-6 parts of hydrophobically modified graphene oxide, 1-3 parts of silicon dioxide, 5-7 parts of ABS resin and 3-6 parts of glass fiber;
the hydrophobically modified graphene oxide is prepared by the steps of:
A1, placing graphite powder and sodium nitrate into a three-neck flask, adding concentrated nitric acid under the condition of ice water bath for reaction for 1h, adding potassium permanganate for reaction for 2h after the temperature of the system is reduced to 20 ℃, then heating to 40-50 ℃, adding deionized water after reaction for 40min, heating to 90 ℃ for reaction for 1h, and carrying out aftertreatment to obtain graphene oxide;
A2, adding graphene oxide and octadecylamine into ethanol, performing ultrasonic treatment for 2 hours, centrifuging at 6000rpm, washing, and performing vacuum drying at 130 ℃ for 3 hours to obtain the hydrophobically modified graphene oxide.
2. The impact corrosion resistant polyethylene pipe according to claim 1, wherein: the dosage ratio of the graphite powder, the sodium nitrate, the concentrated nitric acid, the potassium permanganate and the deionized water is 1-3g:1-2g:100-120mL:5-7g:120-140mL.
3. The impact corrosion resistant polyethylene pipe according to claim 1, wherein: the dosage ratio of the graphene oxide to the octadecylamine to the ethanol is 2-3g:8-11g:120-135mL.
4. The impact corrosion resistant polyethylene pipe according to claim 1, wherein: and the post-treatment is to drop hydrogen peroxide into the system to remove redundant potassium permanganate in the system, acid washing and water washing are performed by using dilute hydrochloric acid and deionized water to remove metal ions and impurities, and then drying is performed.
5. The impact corrosion resistant polyethylene pipe of claim 1, wherein: the corrosion-resistant auxiliary agent is prepared by the following steps:
B1, heating propylene glycol to 140-150 ℃, adding isophthalic acid, introducing nitrogen, heating to 200 ℃, cooling to 150-170 ℃ when the acid value of the system is less than 19mg/g, adding maleic anhydride, heating to 220-240 ℃, reacting for 2 hours, vacuumizing and dehydrating until the acid value of the system is less than 38mg/g, stopping vacuumizing, cooling to 210 ℃, adding divinylbenzene, and stirring for 1 hour to obtain unsaturated polyester resin;
And B2, adding unsaturated polyester resin and maleic anhydride into propylene glycol, heating to 140-150 ℃ for reaction for 2 hours, cooling to room temperature, adding active carbon, removing excessive propylene glycol, and filtering to obtain the corrosion-resistant auxiliary agent.
6. The impact corrosion resistant polyethylene pipe according to claim 5, wherein: the volume ratio of the propylene glycol, the isophthalic acid, the maleic anhydride and the divinylbenzene is 6:2-3:3-4:3-4.
7. The impact corrosion resistant polyethylene pipe according to claim 5, wherein: the volume ratio of the unsaturated polyester resin to the maleic anhydride to the propylene glycol is 4-5:1-2:4-5.
8. The method for preparing the impact corrosion resistant polyethylene pipe according to claim 1, wherein the method comprises the following steps:
The method comprises the following steps: adding high-density polyethylene, corrosion-resistant auxiliary agent, hydrophobic modified graphene oxide, silicon dioxide, ABS resin and glass fiber into a high-speed mixer, stirring and mixing, then adding into a hopper of an extruder, and extruding and forming at 190 ℃ to obtain the impact corrosion-resistant polyethylene pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410284266.7A CN118047990A (en) | 2024-03-13 | 2024-03-13 | Impact corrosion resistant polyethylene pipe and preparation method thereof |
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| CN202410284266.7A CN118047990A (en) | 2024-03-13 | 2024-03-13 | Impact corrosion resistant polyethylene pipe and preparation method thereof |
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