CN114716746A - Hydrophobic and oleophobic polyethylene master batch, preparation method thereof and polyethylene pipeline material - Google Patents

Hydrophobic and oleophobic polyethylene master batch, preparation method thereof and polyethylene pipeline material Download PDF

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CN114716746A
CN114716746A CN202110015482.8A CN202110015482A CN114716746A CN 114716746 A CN114716746 A CN 114716746A CN 202110015482 A CN202110015482 A CN 202110015482A CN 114716746 A CN114716746 A CN 114716746A
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polyethylene
oleophobic
hydrophobic
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temperature
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孙彬彬
王�华
张瑞
宋磊
高宇新
王立娟
王文燕
杨国兴
杨琦
牛娜
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Petrochina Co Ltd
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    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
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    • 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
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    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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    • C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2427/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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Abstract

The invention relates to a hydrophobic and oleophobic polyethylene master batch, which comprises the raw materials of metallocene polyethylene, fluorinated ethylene propylene, a multi-wall carbon nano tube and an antioxidant, wherein the particle size of the fluorinated ethylene propylene is 200nm-400nm, the tube diameter of the multi-wall carbon nano tube is 5nm-15nm, and the tube length is 10 mu m-30 mu m; the dosage of each component of the raw materials is as follows: 30 parts of metallocene polyethylene, 0.1-3 parts of polyperfluorinated ethylene propylene, 1-5 parts of multi-walled carbon nano-tube and 0.5-2 parts of antioxidant. The invention also relates to a preparation method of the hydrophobic and oleophobic polyethylene master batch and a polyethylene pipeline material. The polyethylene master batch and the polyethylene pipe prepared by the formula have good effects on anti-scaling and wax-deposition, and are convenient for popularization and use in oil fields.

Description

Hydrophobic and oleophobic polyethylene master batch, preparation method thereof and polyethylene pipeline material
Technical Field
The invention relates to the field of polyethylene, in particular to a hydrophobic and oleophobic polyethylene master batch, a preparation method thereof and a polyethylene pipeline material containing the polyethylene master batch, wherein the polyethylene pipeline prepared from the polyethylene pipeline material is particularly suitable for being used as an oil field pipeline.
Background
In recent years, with increasingly harsh oil field medium environment, the water content and the temperature gradually rise, and Cl is added-、CO2The content of the corrosive medium is increased, and even H appears in the oil and gas well in some areas2S, brings great risk to the application of the metal pipeline. The serious corrosion, scaling, wax deposition or leakage of the steel pipeline become one of key bottleneck technologies restricting the development of oil fields, the leakage accidents also bring serious potential safety and environmental hazards, and the annual leaking stoppage and pipeline replacement cost high.
With the continuous progress of polyethylene production technology, the polyethylene pipe material can be used in a use environment at the temperature of less than 80 ℃ for a long time, has obvious material cost advantage and is highly concerned by the market.
However, as the water content of crude oil is increased, scaling and wax deposition are easy to occur during temperature change, and due to the characteristics of complex surrounding environment and long pipeline of the oil pipeline, after the crude oil is operated for a period of time, a scale layer and a wax layer are formed on the inner wall of the crude oil, so that the risk of increasing the conveying pressure and even pipe explosion is caused, and the service life of the oil pipeline is shortened. Along with the enhancement of consciousness of people in the aspects of energy conservation and environmental protection, the phenomenon of scaling and wax deposition of an oil pipeline is gradually paid attention to, the research on the performance of scale prevention and wax prevention of common plastic pipes is carried out, and the development of the scale prevention and wax deposition polyethylene oil pipeline is gradually becoming a research hotspot in the field.
The invention discloses a CN111495718A patent, which discloses an audio flexible material with hydrophobic and oleophobic functions and a preparation process and application thereof, wherein the audio flexible material with hydrophobic and oleophobic functions comprises a substrate layer and a double-hydrophobic material layer; the amphiphobic material layer is distributed on the surface and inside the substrate layer. The audio flexible material with the hydrophobic and oleophobic functions has the hydrophobic and oleophobic properties, and is air-permeable and sound-permeable. The invention uses the fluorinated ethylene propylene microporous membrane to realize the oleophobic and hydrophobic properties.
The patent of CN106240991B discloses that carbon black and SiO 2 nano particles are uniformly attached to the surface of polyethylene particles in a mist spraying mode to form an oleophobic, hydrophobic and stain-resistant surface layer.
The CN107383714A invention discloses a ground heating pipe and a preparation method thereof, wherein the ground heating pipe comprises an oil-repellent layer, an adhesive layer and a heat conduction layer, the adhesive layer is arranged on the outer side of the oil-repellent layer, the heat conduction layer is arranged on the outer side of the adhesive layer, the oil-repellent layer is a fluorine-containing polymer, and the thickness of the oil-repellent layer is 0.05 mm-0.5 mm. According to the ground heating pipe and the preparation method thereof, the three-layer structure design is adopted, and the oil-dredging layer, the adhesive layer and the heat conduction layer are mutually cooperated, so that heating water is difficult to gather in the inner layer, the pipeline is not required to be dredged manually, the heat conductivity can be improved, the heating efficiency is improved, the energy consumption is saved, and the use reliability of the ground heating pipe is ensured; and, set up to 0.05mm ~ 0.5mm through the thickness with the oil-repellent layer, the thickness of the oleophobic layer is suitable, on the one hand, can effectively play the hydrophobic effect of oleophobic, and on the other hand, the thickness of the oleophobic layer can not be too thick, can save manufacturing cost, improves the processing property.
CN108440817A patent discloses a hydrophobic and oleophobic polyolefin material and a preparation method thereof, firstly, thionyl chloride is dissolved in a solvent, a catalyst is added, perfluorohexylacetic acid is added dropwise, stirring and reduced pressure distillation are carried out, and perfluorohexylacetyl chloride is obtained; dissolving the nano silicon dioxide in an ethanol water solution, and performing ultrasonic dispersion for 30 min; dropwise adding an aminosilane coupling agent into the mixed solution, heating and stirring to obtain an aminated nano-silica suspension; dissolving perfluorohexyl acetyl chloride in an organic solvent, gradually dropwise adding the dissolved perfluorohexyl acetyl chloride into an aminated nano silicon dioxide suspension, stirring, carrying out reduced pressure distillation, carrying out vacuum drying on the obtained product, carrying out ball milling, and sealing to obtain nano silicon dioxide loaded perfluorohexyl acetamide; and fourthly, uniformly mixing the polyolefin resin and the nano-silica supported perfluorohexyl acetamide by a high-speed mixer, and then performing melt extrusion granulation to prepare the hydrophobic and oleophobic polyolefin material.
CN 107880369A discloses a polyolefin conductive master batch based on a carbon nano tube and graphene compound system and a preparation method thereof, the carbon nano tube and graphene are dispersed in a volatile inert solvent, then a dispersion liquid is obtained by ultrasonic preparation, and then the dispersion liquid is mixed with raw materials and a compatilizer, and the carbon nano tube master batch is obtained by twin-screw extrusion. The concentration of the dispersed carbon nanotubes in the organic solvent is low, so that a high-concentration carbon nanotube dispersion liquid is difficult to obtain, and meanwhile, a large amount of used volatile solvent is not beneficial to environmental protection and brings huge potential safety hazards to large-scale production.
The traditional polyethylene master batch is difficult to realize the improvement of the oleophobic and hydrophobic properties of the surface of the product, and the method has the defects of solvent use, harsh processing conditions and the like.
Disclosure of Invention
In view of the above problems in the prior art, the present invention provides a hydrophobic and oleophobic polyethylene masterbatch, wherein polyfluorinated ethylene propylene and multi-walled carbon nanotubes are applied to the polyethylene masterbatch together, so as to improve the hydrophobic and oleophobic properties of the polyethylene masterbatch.
Another object of the present invention is to provide a method for preparing the hydrophobic and oleophobic polyethylene masterbatch, and a polyethylene pipe material containing the polyethylene masterbatch. The polyethylene pipeline material can be used for oil field pipes, effectively prevents the system from scaling and waxing, and improves the operation efficiency of an oil transportation system.
The hydrophobic and oleophobic polyethylene master batch comprises the raw materials of metallocene polyethylene, fluorinated ethylene propylene, a multi-wall carbon nano tube and an antioxidant, wherein the particle size of the fluorinated ethylene propylene is 300nm, the tube diameter of the multi-wall carbon nano tube is 5nm-15nm, and the tube length is 10 mu m-30 mu m;
the dosage of each component of the raw materials is as follows:
Figure BDA0002885437790000031
specifically, the addition of the polyfluorinated ethylene propylene can improve the hydrophobicity and oleophobicity of the polyethylene master batch, the addition of the carbon nano tube can improve the impact strength and the surface lubricating property of the polyethylene master batch, and the addition of the antioxidant can improve the processing stability and the long-acting thermal-oxidative aging resistance of the material.
The hydrophobic and oleophobic polyethylene master batch of the invention is preferably that the density of the metallocene polyethylene is 0.935-0.945cm3The melt flow rate is 0.5-1.5g/10min, the particle size is 100-500 mu m, and the weight average molecular weight is 5-20 ten thousand.
The hydrophobic and oleophobic polyethylene master batch provided by the invention is preferably that the weight-average molecular weight of the polyperfluorinated ethylene propylene is 20000-40000, and the content of hexafluoropropylene is 15% -20%.
The hydrophobic and oleophobic polyethylene master batch disclosed by the invention is preferably characterized in that the multi-wall carbon nano tube is an XFM03 multi-wall carbon nano tube.
The hydrophobic and oleophobic polyethylene master batch provided by the invention is characterized in that the antioxidant preferably comprises one or more of hindered phenol antioxidant and phosphite antioxidant.
The hydrophobic and oleophobic polyethylene master batch provided by the invention is characterized in that preferably, the hindered phenol antioxidant is pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ]; the phosphite antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite.
The hydrophobic and oleophobic polyethylene master batch is prepared by uniformly mixing metallocene polyethylene, polyfluorinated ethylene propylene, multi-walled carbon nano tubes and an antioxidant to obtain a mixture, melting and heating the mixture, and extruding and granulating the mixture to obtain the hydrophobic and oleophobic polyethylene master batch.
The preparation method of the hydrophobic and oleophobic polyethylene master batch disclosed by the invention is characterized in that preferably, a double-screw extruder is adopted during extrusion granulation, and the temperature of a first section of cylinder of the double-screw extruder is adjusted to be 160-180 ℃, the temperature of a second section of cylinder of the double-screw extruder is adjusted to be 170-200 ℃, and the temperature of a third section of cylinder to a tenth section of cylinder of the double-screw extruder is adjusted to be 180-200 ℃; the melt temperature is 180-200 ℃, and the temperature of the particle cooling water is adjusted to be 45-65 ℃.
Therefore, the invention also provides a polyethylene pipeline material, wherein the polyethylene pipeline material contains 1-5 wt% of the hydrophobic and oleophobic polyethylene master batch or the hydrophobic and oleophobic polyethylene master batch prepared by the method.
The invention has the following beneficial effects:
(1) the polyfluorinated ethylene propylene with the particle size of 300nm and the multi-walled carbon nano tube with the tube diameter of 5nm-15nm and the tube length range of 10 mu m-30 mu m are used as the oleophobic and hydrophobic agent, the particle size is appropriate, and the uniform mixing with the carrier resin is ensured, so that the excellent performance of the oleophobic and hydrophobic agent in subsequent processing is ensured.
(2) The preparation method provided by the invention is simple and mild, does not introduce any solvent, does not relate to high-temperature, high-pressure and other extreme operation processes, and is green, environment-friendly, simple and feasible. The prepared master batch has no pulverization, no flying dust, less addition amount and easy dispersion.
(3) The hydrophobic and oleophobic polyethylene master batch provided by the invention can be used for modifying polyethylene pipe products, and the obtained pipe has the advantages of smooth surface, stable size, no precipitation and strong practicability, and is favorable for popularization and application in oil fields.
(4) The hydrophobic and oleophobic polyethylene master batch provided by the invention is added into a polyethylene pipeline material according to the proportion of 1-5% of the pipeline material by mass, and the obtained special material has better effects in the aspects of impact strength and surface lubrication performance.
Detailed Description
The following examples illustrate the invention in detail: the present example is carried out on the premise of the technical scheme of the present invention, and detailed embodiments and processes are given, but the scope of the present invention is not limited to the following examples, and experimental methods without specific conditions noted in the following examples are generally performed under conventional conditions.
The hydrophobic and oleophobic polyethylene master batch provided by the invention comprises the raw materials of metallocene polyethylene, fluorinated ethylene propylene, a multi-wall carbon nano tube and an antioxidant, wherein the particle size of the fluorinated ethylene propylene is 300nm, the tube diameter of the multi-wall carbon nano tube is 5nm-15nm, and the tube length is 10 mu m-30 mu m;
the dosage of each component of the raw materials is as follows:
Figure BDA0002885437790000051
specifically, the addition of the polyfluorinated ethylene propylene can improve the hydrophobicity and oleophobicity of the polyethylene master batch, the addition of the carbon nano tube can improve the impact strength and the surface lubricating property of the polyethylene master batch, and the addition of the antioxidant can improve the processing stability and the long-acting thermal-oxidative aging resistance of the material.
In some embodiments, it is preferred that the metallocene polyethylene has a density of from 0.935 to 0.945cm3The melt flow rate is 0.5-1.5g/10min, the particle size is 100-500 mu m, and the weight average molecular weight is 5-20 ten thousand.
In some embodiments, it is preferred that the weight average molecular weight of the polyperfluoroethylene propylene is 20000-40000, with a hexafluoropropylene content of 15% to 20%.
In some embodiments, it is preferred that the multi-walled carbon nanotube is an XFM03 multi-walled carbon nanotube.
In some embodiments, it is preferred that the antioxidant comprises one or more of hindered phenolic antioxidants, phosphite antioxidants.
In some embodiments, it is preferred that the hindered phenolic antioxidant is pentaerythritol tetrakis [ β - (3, 5-di-tert-butyl-4 hydroxyphenyl) propionate ]; the phosphite ester antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite.
The preparation method of the hydrophobic and oleophobic polyethylene master batch provided by the invention comprises the steps of uniformly mixing metallocene polyethylene, fluorinated ethylene propylene, multi-wall carbon nano tubes and an antioxidant to obtain a mixture, melting and heating the mixture, and extruding and granulating the mixture to obtain the hydrophobic and oleophobic polyethylene master batch.
In some embodiments, preferably, during the extrusion granulation, a double-screw extruder is adopted, and the temperature of the first-stage cylinder of the double-screw extruder is adjusted to be 160-180 ℃, the temperature of the second-stage cylinder of the double-screw extruder is adjusted to be 170-200 ℃, and the temperature of the third-to-tenth-stage cylinder of the double-screw extruder is adjusted to be 180-200 ℃; the melt temperature is 180-200 ℃, and the temperature of the particle cooling water is adjusted to be 45-65 ℃.
The polyethylene pipeline material provided by the invention contains 1-5 wt% of the hydrophobic and oleophobic polyethylene master batch or the hydrophobic and oleophobic polyethylene master batch prepared by the method.
Example 1
The raw materials of the hydrophobic and oleophobic polyethylene master batch of the embodiment 1 comprise metallocene polyethylene powder, fluorinated ethylene propylene micropowder, multi-walled carbon nanotube XFM03 and an antioxidant, and the dosage of each component of the raw materials is as follows: 30 parts of metallocene polyethylene powder, 0.1 part of polyfluorinated ethylene propylene micro powder, 1 part of multi-walled carbon nano tube and 0.5 part of antioxidant.
The metallocene polyethylene powder in this example was DQDN3711 from daqing petrochemical company.
In this example, the particle size of the FEP fine powder is 300nm, the weight average molecular weight is 30000, and the content of hexafluoropropylene is 17%.
In the embodiment, the diameter of the multi-wall carbon nano tube is 5nm-15nm, and the length of the multi-wall carbon nano tube is 10 μm-30 μm.
Preparing polyethylene master batch:
the hydrophobic and oleophobic polyethylene master batch is prepared by drying and weighing the raw materials in sequence, uniformly mixing, and then carrying out melting heating, extruding processing by an extruder, granulating and drying treatment.
Specifically, during extrusion granulation, a double-screw extruder is adopted, and the temperature of a first section of barrel body of the double-screw extruder is adjusted to be 170 ℃, the temperature of a second section of barrel body is adjusted to be 185 ℃, and the temperature of a third section of barrel body to a tenth section of barrel body is adjusted to be 190 ℃; the melt temperature was 185 ℃ and the temperature of the pellet cooling water was adjusted to 55 ℃.
Preparation of polyethylene pipe:
the prepared hydrophobic and oleophobic polyethylene master batch and high-density polyethylene (with the weight average molecular weight of 12-30 ten thousand) are processed and produced according to the mass ratio of 1:50, after the two are uniformly mixed, a single-screw pipe extruder is adopted, the length-diameter ratio of a screw is 30, the melt temperature is 200 ℃, the processing linear speed is 6.0m/min, and a polyethylene pipe (with the outer diameter of 32mm and the wall thickness of 3.0mm) is produced.
Cutting the prepared polyethylene pipe into a plurality of small sections of about 5cm, polishing the edge, cleaning, putting into a constant-temperature drying oven, and taking out after 12h for later use. And measuring the water contact angle and the n-hexadecane contact angle of the surface of the polyethylene pipe. The results of the measurements are shown in Table 1.
Weighing the polyethylene pipe section, putting the polyethylene pipe section into a water-containing original oil bath (with the water content of 75%), standing the polyethylene pipe section for 48 hours at the temperature of 40 ℃, weighing the polyethylene pipe section, and calculating the scaling amount and the scaling rate. The results of the measurements are shown in Table 2.
Example 2
The raw materials of the hydrophobic and oleophobic polyethylene master batch of the embodiment 2 comprise metallocene polyethylene powder, polyfluorinated ethylene propylene micropowder, multi-walled carbon nano tube XFM03 and an antioxidant, and the weight components of the raw materials are as follows: 30 parts of metallocene polyethylene powder, 3 parts of polyfluorinated ethylene propylene micro powder, 5 parts of multi-walled carbon nano tube and 2 parts of antioxidant.
The metallocene polyethylene powder in this example was DQDN3711 from daqing petrochemical company.
In this example, the particle size of the FEP fine powder is 300nm, the weight average molecular weight is 30000, and the content of hexafluoropropylene therein is 19%.
In the embodiment, the diameter of the multi-wall carbon nano tube is 5nm-15nm, and the length of the multi-wall carbon nano tube is 10 μm-30 μm.
Preparing polyethylene master batch:
the hydrophobic and oleophobic polyethylene master batch is prepared by drying and weighing the raw materials in sequence, uniformly mixing, and then carrying out melting heating, extruding processing by an extruder, granulating and drying treatment.
Specifically, during extrusion granulation, a double-screw extruder is adopted, and the temperature of a first section of barrel body of the double-screw extruder is adjusted to be 170 ℃, the temperature of a second section of barrel body is adjusted to be 185 ℃, and the temperature of a third section of barrel body to a tenth section of barrel body is adjusted to be 190 ℃; the melt temperature was 185 ℃ and the temperature of the pellet cooling water was adjusted to 55 ℃.
Preparation of polyethylene pipe:
the prepared hydrophobic and oleophobic polyethylene master batch and high-density polyethylene (with the weight average molecular weight of 12-30 ten thousand) are processed and produced according to the mass ratio of 1:30, after the two are uniformly mixed, a single-screw pipe extruder is adopted, the length-diameter ratio of a screw is 30, the melt temperature is 200 ℃, the processing linear speed is 6.0m/min, and a polyethylene pipe (with the outer diameter of 32mm and the wall thickness of 3.0mm) is produced.
Cutting a polyethylene pipe into a plurality of small sections of about 5cm, polishing the edges, cleaning the edges smoothly, putting the small sections into a constant-temperature drying box, and taking out the small sections for later use after 12 hours. And measuring the water contact angle and the n-hexadecane contact angle of the surface of the polyethylene pipe. The results of the measurements are shown in Table 1.
Weighing the polyethylene pipe section, putting the polyethylene pipe section into a water-containing original oil bath (with the water content of 75%), standing the polyethylene pipe section for 48 hours at the temperature of 40 ℃, weighing the polyethylene pipe section, and calculating the scaling amount and the scaling rate. The results of the measurements are shown in Table 2.
Example 3
The raw materials of the hydrophobic and oleophobic polyethylene master batch of embodiment 3 include metallocene polyethylene powder, fluorinated ethylene propylene micropowder, multi-walled carbon nanotube XFM03 and antioxidant, and the dosage of the raw materials is as follows: 30 parts of metallocene polyethylene powder, 3 parts of polyfluorinated ethylene propylene micropowder, 1 part of multi-walled carbon nano tube and 0.5 part of antioxidant.
The metallocene polyethylene powder in this example was DQDN3711 from daqing petrochemical company.
In this example, the particle size of the FEP fine powder is 300nm, the weight average molecular weight is 40000, and the content of hexafluoropropylene is 16%.
In the embodiment, the diameter of the multi-wall carbon nano tube is 5nm-15nm, and the length of the multi-wall carbon nano tube is 10 μm-30 μm.
Preparing polyethylene master batch:
the hydrophobic and oleophobic polyethylene master batch is prepared by drying and weighing the raw materials in sequence, uniformly mixing, and then carrying out melting heating, extruding processing by an extruder, granulating and drying treatment.
Specifically, during extrusion granulation, a double-screw extruder is adopted, and the temperature of a first section of barrel body of the double-screw extruder is adjusted to be 170 ℃, the temperature of a second section of barrel body is adjusted to be 185 ℃, and the temperature of a third section of barrel body to a tenth section of barrel body is adjusted to be 190 ℃; the melt temperature was 185 ℃ and the temperature of the pellet cooling water was adjusted to 55 ℃.
Preparation of polyethylene pipe:
the prepared hydrophobic and oleophobic polyethylene master batch and high-density polyethylene (with the weight average molecular weight of 12-30 ten thousand) are processed and produced according to the mass ratio of 1:80, after the two are uniformly mixed, a single-screw pipe extruder is adopted, the length-diameter ratio of a screw is 30, the melt temperature is 200 ℃, the processing linear speed is 6.0m/min, and a polyethylene pipe (with the outer diameter of 32mm and the wall thickness of 3.0mm) is produced.
Cutting a polyethylene pipe into a plurality of small sections of about 5cm, polishing the edges, cleaning the edges smoothly, putting the small sections into a constant-temperature drying box, and taking out the small sections for later use after 12 hours. And measuring the water contact angle and the n-hexadecane contact angle of the surface of the polyethylene pipe. The results of the measurements are shown in Table 1.
Weighing the polyethylene pipe section, putting the polyethylene pipe section into a water-containing original oil bath (with the water content of 75%), standing the polyethylene pipe section for 48 hours at the temperature of 40 ℃, weighing the polyethylene pipe section, and calculating the scaling amount and the scaling rate. The measurement results are shown in Table 2.
Example 4
The raw materials of the hydrophobic and oleophobic polyethylene master batch of embodiment 4 include metallocene polyethylene powder, fluorinated ethylene propylene micropowder, multi-walled carbon nanotube XFM03 and antioxidant, and the dosage of the raw materials is as follows: 30 parts of metallocene polyethylene powder, 1.5 parts of polyfluorinated ethylene propylene micropowder, 5 parts of multi-walled carbon nano-tube and 2 parts of antioxidant.
The metallocene polyethylene powder in this example was DQDN3711 from daqing petrochemical company.
In this example, the particle size of the fluorinated ethylene propylene micropowder is 300nm, the weight average molecular weight is 20000, and the hexafluoropropylene content is 17%.
In this embodiment, the multi-walled carbon nanotube has a diameter of 5nm-15nm and a length of 10 μm-30 μm.
Preparing polyethylene master batch:
the hydrophobic and oleophobic polyethylene master batch is prepared by drying and weighing the raw materials in sequence, uniformly mixing, and then carrying out melting heating, extrusion processing by an extruder, grain cutting and drying treatment.
Specifically, during extrusion granulation, a double-screw extruder is adopted, and the temperature of a first section of barrel body of the double-screw extruder is adjusted to be 170 ℃, the temperature of a second section of barrel body is adjusted to be 185 ℃, and the temperature of a third section of barrel body to a tenth section of barrel body is adjusted to be 190 ℃; the melt temperature was 185 ℃ and the temperature of the pellet cooling water was adjusted to 55 ℃.
Preparation of polyethylene pipe:
the prepared hydrophobic and oleophobic polyethylene master batch and high-density polyethylene (with the weight-average molecular weight of 12-30 ten thousand) are processed and produced according to the specific gravity of the mass ratio of 1:50, and after the two are uniformly mixed, a single-screw pipe extruder is adopted, the length-diameter ratio of a screw is 30, the melt temperature is 200 ℃, the processing linear speed is 6.0m/min, and a polyethylene pipe (with the outer diameter of 32mm and the wall thickness of 3.0mm) is produced.
Cutting a polyethylene pipe into a plurality of small sections of about 5cm, polishing the edges, cleaning the edges smoothly, putting the small sections into a constant-temperature drying box, and taking out the small sections for later use after 12 hours. The water contact angle and the n-hexadecane contact angle of the surface of the polyethylene pipe are measured. The measurement results are shown in Table 1.
Weighing the polyethylene pipe section, putting the polyethylene pipe section into a water-containing original oil bath (with the water content of 75%), standing the polyethylene pipe section for 48 hours at the temperature of 40 ℃, weighing the polyethylene pipe section, and calculating the scaling amount and the scaling rate. The measurement results are shown in Table 2.
Example 5
The raw materials of the hydrophobic and oleophobic polyethylene master batch of the embodiment 5 comprise metallocene polyethylene powder, fluorinated ethylene propylene micropowder, multi-walled carbon nanotube XFM03 and an antioxidant, and the dosage of each component in the raw materials is as follows: 30 parts of metallocene polyethylene powder, 1.5 parts of polyfluorinated ethylene propylene micropowder, 3 parts of multi-walled carbon nano tube and 1.2 parts of antioxidant.
The metallocene polyethylene powder in this example was DQDN3711 from daqing petrochemical company.
In this example, the particle size of the FEP fine powder is 300nm, the weight average molecular weight is 30000, and the content of hexafluoropropylene is 18%.
In the embodiment, the diameter of the multi-wall carbon nano tube is 5nm-15nm, and the length of the multi-wall carbon nano tube is 10 μm-30 μm.
Preparing polyethylene master batch:
the hydrophobic and oleophobic polyethylene master batch is prepared by drying and weighing the raw materials in sequence, uniformly mixing, and then carrying out melting heating, extruding processing by an extruder, granulating and drying treatment.
Specifically, during extrusion granulation, a double-screw extruder is adopted, and the temperature of a first section of barrel body of the double-screw extruder is adjusted to be 170 ℃, the temperature of a second section of barrel body is adjusted to be 185 ℃, and the temperature of a third section of barrel body to a tenth section of barrel body is adjusted to be 190 ℃; the melt temperature was 185 ℃ and the temperature of the pellet cooling water was adjusted to 55 ℃.
Preparation of polyethylene pipe:
the prepared hydrophobic and oleophobic polyethylene master batch and high-density polyethylene (with the weight average molecular weight of 12-30 ten thousand) are processed and produced according to the mass ratio of 1:50, after the two are uniformly mixed, a single-screw pipe extruder is adopted, the length-diameter ratio of a screw is 30, the melt temperature is 200 ℃, the processing linear speed is 6.0m/min, and a polyethylene pipe (with the outer diameter of 32mm and the wall thickness of 3.0mm) is produced.
Cutting a polyethylene pipe into a plurality of small sections of about 5cm, polishing the edges, cleaning the edges smoothly, putting the small sections into a constant-temperature drying box, and taking out the small sections for later use after 12 hours. And measuring the water contact angle and the n-hexadecane contact angle of the surface of the polyethylene pipe. The results of the measurements are shown in Table 1.
Weighing the polyethylene pipe section, putting the polyethylene pipe section into a water-containing original oil bath (with the water content of 75%), standing the polyethylene pipe section for 48 hours at the temperature of 40 ℃, weighing the polyethylene pipe section, and calculating the scaling amount and the scaling rate. The measurement results are shown in Table 2.
Example 6
The raw materials of the hydrophobic and oleophobic polyethylene master batch of embodiment 6 include metallocene polyethylene powder, fluorinated ethylene propylene micropowder, multi-walled carbon nanotube XFM03 and antioxidant, and the dosage of each component in the raw materials is as follows: 30 parts of metallocene polyethylene powder, 1.5 parts of polyfluorinated ethylene propylene micropowder, 1 part of multi-walled carbon nano tube and 0.5 part of antioxidant.
The metallocene polyethylene powder in this example was DQDN3711 from daqing petrochemical company.
In this example, the particle size of the FEP fine powder is 300nm, the weight average molecular weight is 30000, and the content of hexafluoropropylene is 17%.
In the embodiment, the diameter of the multi-wall carbon nano tube is 5nm-15nm, and the length of the multi-wall carbon nano tube is 10 μm-30 μm.
Preparing polyethylene master batch:
the hydrophobic and oleophobic polyethylene master batch is prepared by drying and weighing the raw materials in sequence, uniformly mixing, and then carrying out melting heating, extruding processing by an extruder, granulating and drying treatment.
Specifically, during extrusion granulation, a double-screw extruder is adopted, and the temperature of a first section of barrel body of the double-screw extruder is adjusted to be 170 ℃, the temperature of a second section of barrel body is adjusted to be 185 ℃, and the temperature of a third section of barrel body to a tenth section of barrel body of the double-screw extruder is adjusted to be 190 ℃; the melt temperature was 185 ℃ and the temperature of the pellet cooling water was adjusted to 55 ℃.
Preparation of polyethylene pipe:
the prepared hydrophobic and oleophobic polyethylene master batch and high-density polyethylene (with the weight average molecular weight of 12-30 ten thousand) are processed and produced according to the mass ratio of 1:50, after the two are uniformly mixed, a single-screw pipe extruder is adopted, the length-diameter ratio of a screw is 30, the melt temperature is 200 ℃, the processing linear speed is 6.0m/min, and a polyethylene pipe (with the outer diameter of 32mm and the wall thickness of 3.0mm) is produced.
Cutting a polyethylene pipe into a plurality of small sections of about 5cm, polishing and cleaning the edges, putting the small sections into a constant-temperature drying box, and taking out the small sections for later use after 12 hours. And measuring the water contact angle and the n-hexadecane contact angle of the surface of the polyethylene pipe. The measurement results are shown in Table 1.
Weighing the polyethylene pipe section, putting the polyethylene pipe section into a water-containing original oil bath (with the water content of 75%), standing the polyethylene pipe section for 48 hours at the temperature of 40 ℃, weighing the polyethylene pipe section, and calculating the scaling amount and the scaling rate. The results of the measurements are shown in Table 2.
Comparative example 1
Preparation of polyethylene pipe:
in this comparative example, a polyethylene pipe (32 mm in outside diameter and 3.0mm in wall thickness) was produced using the same polyethylene material as in example 1, without adding the polyethylene masterbatch, and using the same conventional pipe extrusion process as in example 1.
Cutting a polyethylene pipe into a plurality of small sections of about 5cm, polishing and cleaning the edges, putting the small sections into a constant-temperature drying box, and taking out the small sections for later use after 12 hours. And measuring the water contact angle and the n-hexadecane contact angle of the surface of the polyethylene pipe. The results of the measurements are shown in Table 1.
Weighing the polyethylene pipe section, putting the polyethylene pipe section into a water-containing original oil bath (with the water content of 75%), standing the polyethylene pipe section for 48 hours at the temperature of 40 ℃, weighing the polyethylene pipe section, and calculating the scaling amount and the scaling rate. The results of the measurements are shown in Table 2.
Comparative example 2
In the comparative example, a plurality of Q235 carbon steel hanging pieces which are widely applied are selected, polished by sand paper to remove rust and cleaned, and then the hanging pieces are put into a constant-temperature drying oven for 12 hours and then taken out for standby. The water contact angle and the n-hexadecane contact angle of the surface of the coupon were measured. The results of the measurements are shown in Table 1.
And weighing the hanging pieces, putting the hanging pieces into a water-containing original oil bath (with the water content of 75%), standing the hanging pieces for 48 hours at the temperature of 40 ℃, weighing the hanging pieces, and calculating the scaling amount and the scaling rate. The results of the measurements are shown in Table 2.
TABLE 1 contact Angle test data for examples and comparative examples
Serial number Water contact Angle (°) Contact Angle of n-hexadecane (°)
Example 1 108 32
Example 2 121 44
Example 3 115 39
Example 4 120 42
Example 5 125 45
Example 6 116 34
Comparative example 1 91 22
Comparative example 2 88 15
TABLE 2 fouling data Table for examples and comparative examples
Figure BDA0002885437790000141
As can be seen from the comparison of the test results in tables 1 and 2, the scale formation amount and the scale formation rate of the embodiment using the hydrophobic and oleophobic polyethylene master batch are greatly reduced compared with those of the comparative example 1, the hydrophobic and oleophobic performance of the surface of the pipe is obviously improved, the use strength is not influenced, and the hydrophobic and oleophobic polyethylene master batch can be suitable for conveying the water-containing crude oil in the oil field.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore intended that all such changes and modifications as fall within the true spirit and scope of the invention be considered as within the following claims.

Claims (9)

1. The hydrophobic and oleophobic polyethylene master batch is characterized in that raw materials comprise metallocene polyethylene, fluorinated ethylene propylene, a multi-walled carbon nano-tube and an antioxidant, wherein the particle size of the fluorinated ethylene propylene is 200nm-400nm, the tube diameter of the multi-walled carbon nano-tube is 5nm-15nm, and the tube length is 10 mu m-30 mu m;
the dosage of each component of the raw materials is as follows:
Figure FDA0002885437780000011
2. the hydrophobic and oleophobic polyethylene master batch of claim 1, wherein the metallocene polyethylene has a density of 0.935 to 0.945cm3The melt flow rate is 0.5-1.5g/10min, the particle size is 100-500 mu m, and the weight average molecular weight is 5-20 ten thousand.
3. The hydrophobic and oleophobic polyethylene master batch of claim 1, wherein the weight average molecular weight of the polyperfluorinated ethylene propylene is 20000-40000, and the content of hexafluoropropylene is 15% -20%.
4. The hydrophobic oleophobic polyethylene masterbatch of claim 1, wherein the multi-walled carbon nanotubes are XFM03 multi-walled carbon nanotubes.
5. The hydrophobic and oleophobic polyethylene master batch of claim 1, wherein the antioxidant comprises one or more of hindered phenol antioxidants and phosphite antioxidants.
6. The hydrophobic and oleophobic polyethylene master batch of claim 5, wherein the hindered phenolic antioxidant is pentaerythritol tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ]; the phosphite ester antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite.
7. The preparation method of the hydrophobic and oleophobic polyethylene master batch according to any one of claims 1-6, characterized in that the metallocene polyethylene, the polyfluoroethylpropylene, the multi-walled carbon nanotube and the antioxidant are mixed to obtain a mixture, and the mixture is subjected to melting and heating and then extrusion granulation to obtain the hydrophobic and oleophobic polyethylene master batch.
8. The method for preparing the hydrophobic and oleophobic polyethylene master batch according to claim 7, wherein during the extrusion granulation, a twin-screw extruder is adopted, and the temperature of the first section of the cylinder body of the twin-screw extruder is adjusted to be 160-180 ℃, the temperature of the second section of the cylinder body is adjusted to be 170-200 ℃, and the temperature of the third to tenth sections of the cylinder body is adjusted to be 180-200 ℃; the melt temperature is 180-200 ℃, and the temperature of the particle cooling water is adjusted to be 45-65 ℃.
9. A polyethylene pipe material, wherein the polyethylene pipe material contains 1 to 5 wt% of the hydrophobic and oleophobic polyethylene master batch according to any one of claims 1 to 6 or the hydrophobic and oleophobic polyethylene master batch prepared by the method according to any one of claims 7 to 8.
CN202110015482.8A 2021-01-06 2021-01-06 Hydrophobic and oleophobic polyethylene master batch, preparation method thereof and polyethylene pipeline material Pending CN114716746A (en)

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