CN113429671A - Polypropylene glass fiber net composite pipe and preparation method thereof - Google Patents
Polypropylene glass fiber net composite pipe and preparation method thereof Download PDFInfo
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- CN113429671A CN113429671A CN202110708877.6A CN202110708877A CN113429671A CN 113429671 A CN113429671 A CN 113429671A CN 202110708877 A CN202110708877 A CN 202110708877A CN 113429671 A CN113429671 A CN 113429671A
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- glass fiber
- polypropylene
- fiber net
- layer pipe
- melt adhesive
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- 239000003365 glass fiber Substances 0.000 title claims abstract description 127
- -1 Polypropylene Polymers 0.000 title claims abstract description 95
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 69
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 69
- 239000002131 composite material Substances 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000004831 Hot glue Substances 0.000 claims abstract description 58
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 40
- 239000000194 fatty acid Substances 0.000 claims abstract description 40
- 229930195729 fatty acid Natural products 0.000 claims abstract description 40
- 239000001335 perilla frutescens leaf extract Substances 0.000 claims abstract description 38
- 229920001577 copolymer Polymers 0.000 claims abstract description 21
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000000835 fiber Substances 0.000 claims abstract description 20
- 239000004033 plastic Substances 0.000 claims abstract description 20
- 229920003023 plastic Polymers 0.000 claims abstract description 20
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 229910052582 BN Inorganic materials 0.000 claims abstract description 9
- 239000002071 nanotube Substances 0.000 claims abstract description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 46
- 239000000463 material Substances 0.000 claims description 29
- 238000006243 chemical reaction Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 21
- 238000002156 mixing Methods 0.000 claims description 21
- 241001529742 Rosmarinus Species 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000002844 melting Methods 0.000 claims description 13
- 230000008018 melting Effects 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 12
- DAKWPKUUDNSNPN-UHFFFAOYSA-N Trimethylolpropane triacrylate Chemical compound C=CC(=O)OCC(CC)(COC(=O)C=C)COC(=O)C=C DAKWPKUUDNSNPN-UHFFFAOYSA-N 0.000 claims description 11
- 230000001678 irradiating effect Effects 0.000 claims description 11
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 10
- 229910052796 boron Inorganic materials 0.000 claims description 10
- 239000000284 extract Substances 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 10
- 239000002243 precursor Substances 0.000 claims description 10
- 238000000605 extraction Methods 0.000 claims description 8
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 7
- 239000001257 hydrogen Substances 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 7
- 239000011976 maleic acid Substances 0.000 claims description 7
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000013329 compounding Methods 0.000 claims description 6
- 238000000151 deposition Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000012298 atmosphere Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000004108 freeze drying Methods 0.000 claims description 5
- XEMZLVDIUVCKGL-UHFFFAOYSA-N hydrogen peroxide;sulfuric acid Chemical compound OO.OS(O)(=O)=O XEMZLVDIUVCKGL-UHFFFAOYSA-N 0.000 claims description 5
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 5
- 230000010355 oscillation Effects 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000009210 therapy by ultrasound Methods 0.000 claims description 5
- YHWCPXVTRSHPNY-UHFFFAOYSA-N butan-1-olate;titanium(4+) Chemical compound [Ti+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] YHWCPXVTRSHPNY-UHFFFAOYSA-N 0.000 claims description 4
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 4
- 238000007598 dipping method Methods 0.000 claims description 4
- 230000035484 reaction time Effects 0.000 claims description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 229910052700 potassium Inorganic materials 0.000 claims description 2
- 239000011591 potassium Substances 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims 1
- 229920000642 polymer Polymers 0.000 abstract description 12
- 230000003647 oxidation Effects 0.000 abstract description 10
- 238000007254 oxidation reaction Methods 0.000 abstract description 10
- 229910021486 amorphous silicon dioxide Inorganic materials 0.000 abstract description 3
- 239000003963 antioxidant agent Substances 0.000 description 8
- 230000003078 antioxidant effect Effects 0.000 description 8
- 230000032683 aging Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 230000035882 stress Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000012808 vapor phase Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 150000002148 esters Chemical group 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004224 protection Effects 0.000 description 2
- 239000001331 rosmarinus officinalis leaf Substances 0.000 description 2
- 206010068051 Chimerism Diseases 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 238000007539 photo-oxidation reaction Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000005406 washing Methods 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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/028—Net structure, e.g. spaced apart filaments bonded at the crossing points
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
- C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/80—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with boron or compounds thereof, e.g. borides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/12—Rigid pipes of plastics with or without reinforcement
- F16L9/121—Rigid pipes of plastics with or without reinforcement with three layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/101—Glass fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Textile Engineering (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a polypropylene glass fiber net composite pipe and a preparation method thereof. The composite pipe sequentially comprises an inner layer pipe, a glass fiber net and an outer layer pipe from inside to outside; the glass fiber is bonded with the inner layer pipe and the outer layer pipe through hot melt adhesive; the outer layer pipe and the inner layer pipe are both made of polypropylene plastics, and the polypropylene plastics comprise the following raw materials: 100-110 parts of polypropylene, 15-20 parts of propylene-octene copolymer, 12-16 parts of chopped glass fiber and 22-32 parts of perilla seed oil. Has the advantages that: (1) pretreating perilla seed oil: the compatibility of the obtained fatty acid solution A enhanced glass fiber and the polymer is improved, and the interfacial viscosity is increased; the fatty acid solution B enhances the dispersibility, compatibility and oxidation resistance of the chopped fibers in the polymer; (2) amorphous silicon dioxide in the glass fiber net is utilized to catalyze and grow the boron nitride nanotube on the surface, so that the through plane thermal conductivity is enhanced, the embedding property of the glass fiber net and a polymer is enhanced, and the mechanical property is enhanced.
Description
Technical Field
The invention relates to the technical field of composite pipes, in particular to a polypropylene glass fiber net composite pipe and a preparation method thereof.
Background
In recent years, compared with the traditional metal pipeline, the polypropylene pipe has been widely developed due to the excellent performances of light weight, corrosion resistance, low cost, convenient installation and transportation and the like, and replaces the application of the traditional metal pipe in a plurality of fields. But the application range of the alloy is limited due to low heat distortion temperature and low strength. Generally, glass fibers are used for enhancing the strength of polypropylene to obtain a composite tube, but the composite tube has poor compatibility with polymers, poor dispersibility and low interface strength, and the mechanical property is reduced; and the glass fiber is long acting between layers and can not penetrate through the plane, so that the heat resistance is low. In addition, an antioxidant is usually added to improve the aging resistance of the polypropylene, so that the polypropylene only plays a role in resisting oxidation and is rarely used for modifying glass fibers and enhancing the dispersibility of the glass fibers.
Therefore, in summary, it is important to solve the above problems and to prepare a polypropylene glass fiber net composite tube with high strength, good heat resistance and high aging resistance.
Disclosure of Invention
The invention aims to provide a polypropylene glass fiber net composite pipe and a preparation method thereof, and aims to solve the problems in the background art.
In order to solve the technical problems, the invention provides the following technical scheme:
a polypropylene glass fiber net composite pipe comprises an inner layer pipe, a glass fiber net and an outer layer pipe from inside to outside in sequence; the glass fiber is bonded with the inner layer pipe and the outer layer pipe through hot melt adhesive; the outer layer pipe and the inner layer pipe are both made of polypropylene plastics, and the polypropylene plastics comprise the following raw materials: 100-110 parts of polypropylene, 15-20 parts of propylene-octene copolymer, 12-16 parts of chopped glass fiber and 22-32 parts of perilla seed oil.
Preferably, the raw materials of the hot melt adhesive comprise the following components: 35-50 parts of maleic-stem-grafted polypropylene, 15-20 parts of propylene-octene copolymer and 5-10 parts of trimethylolpropane triacrylate.
Preferably, the glass fiber net is a high silica glass fiber net; boron nitride nanotubes grow on the surface of the glass fiber net.
Preferably, the preparation method of the polypropylene glass fiber net composite pipe comprises the following steps:
s1: pretreatment of perilla seed oil: (1) mixing perilla seed oil with ethanol, and performing ultrasonic reaction to obtain a fatty acid ester solution A; (2) crushing rosemary leaves, extracting in perilla seed oil, carrying out liquid-solid separation, mixing an extract and ethanol, and carrying out ultrasonic reaction to obtain a fatty acid ester solution B;
s2: pretreating a glass fiber net: vapor-depositing the boron-containing precursor on the glass fiber net, and facilitating vacuum high-temperature heat treatment to obtain the boron nitride nanotube/glass fiber net; soaking in water, and irradiating; transferring the mixture into a fatty acid ester solution A, dipping, carrying out oscillation reaction, and drying to obtain a glass fiber net A;
s3: preparation of polypropylene plastic: (1) placing the chopped glass fiber in concentrated sulfuric acid-hydrogen peroxide for treatment to obtain a chopped glass fiber A; placing the chopped fiber composite in a fatty acid solution B, performing ultrasonic treatment and freeze-drying to obtain a chopped fiber composite; (2) melting and blending polypropylene and propylene-octene copolymer, adding chopped fiber compound, homogenizing while hot to obtain polypropylene plastic prepreg as inner pipe material and outer pipe material;
s4: preparing a hot melt adhesive: melting and blending polypropylene grafted by maleic acid rods, propylene-octene copolymer and trimethylolpropane triacrylate to obtain a hot melt adhesive;
s5: extruding and molding the inner layer pipe material through an extruder to obtain an inner layer pipe; the hot melt adhesive is arranged in a grinding tool by taking the hot melt adhesive as a model, and the hot melt adhesive is coated on the outer wall of the inner layer pipe through an extruder; soaking the glass fiber net A in hot melt adhesive to wrap the outer wall of the inner layer pipe, connecting the glass fiber net A with the hot melt adhesive, and coating a layer of hot melt adhesive on the glass fiber net A through an extruder; irradiating to obtain a primary tube; and (4) introducing the outer-layer pipe material into an extruder, and fusing and compounding the outer-layer pipe material with the outer wall of the primary pipe to obtain the composite pipe.
Preferably, in the step (1) of S1, the volume ratio of the perilla seed oil to the ethanol is 1 (10-15); the ultrasonic reaction temperature is 22-28 ℃, and the reaction time is 15-25 minutes.
Preferably, in the step (2) of S1, the mass-to-volume ratio of the perilla seed oil to the rosemary leaf is 40-60%; extraction conditions are as follows: stirring and extracting for 1-3 hours at 105-142 ℃ in a nitrogen atmosphere; the volume ratio of the extract to the ethanol is 1 (6-8), the ultrasonic reaction temperature is 22-28 ℃, and the reaction time is 15-25 minutes.
Preferably, in step S2, the boron-containing precursor is prepared by reacting diboron trioxide, magnesium and potassium borohydride; and (3) heat treatment conditions: the temperature is 1100-1200 ℃, the gas atmosphere is nitrogen-hydrogen mixed gas, and the time is 20-40 minutes.
Preferably, in step S2, the irradiation conditions are: the dose is 80-90 KGy, and the irradiation time is 15-30 minutes; oscillating the reaction conditions: the temperature is 110-120 ℃ and the time is 2-3 hours.
Preferably, the melting temperature in step S3 is 150-180 ℃.
Preferably, in the step S5, the processing temperature of the inner-layer pipe material is 180-240 ℃, and the rotating speed of the extruder is 15-20 rmp; the processing temperature of the hot melt adhesive is 160-210 ℃, and the extrusion rate is 10-15 rmp; the processing temperature of the outer-layer pipe material is 200-260 ℃, and the extrusion rate is 15-20 rmp; the irradiation conditions were: the dosage is 9-50 KGy, and the time is 20-30 minutes.
In the technical scheme, the glass fiber net is used as a reinforcing material and is compounded with the inner layer pipe and the outer layer pipe which take polypropylene as a main body, so that the mechanical property and the heat resistance of the composite pipe are obviously enhanced; compatibility between the inorganic material and the polypropylene is enhanced through the perilla seed oil, and the oxidation resistance of the composite pipe is improved.
First, pretreatment of the glass fiber web: (1) firstly, depositing a boron-containing precursor on the surface of a glass fiber net, wherein in the process of high-temperature heat treatment, the surface of the glass fiber is etched by hydrogen to generate defects, the boron-containing precursor forms liquid drops which are embedded on the surface defects of the glass fiber, and the boron-containing precursor is catalytically grown into boron nitride nanotubes on the surface of the glass fiber because the glass fiber contains a large amount of amorphous silicon dioxide. By loading the boron nitride nanotubes in the way, the bonding force between the glass fiber net and the boron nitride nanotubes can be enhanced without considering the dispersibility of the boron nitride nanotubes and using additional silane coupling agents and other substances. The boron nitride nanotubes grown on the surface can increase the through plane thermal conductivity of the composite tube, enhance the heat resistance and thermal oxidation of the composite tube, enhance the embedment of the glass fiber net and the polymer, enhance the stress conduction, reduce the impact force and enhance the mechanical property of the composite tube.
It should be noted that: the heat treatment time is not suitable to be too long in the heat treatment process, and the boron nitride nanotubes grow along the depth direction of the glass fibers along with the increase of the treatment time, so that the glass fibers become thin or crack, and the integrity of the glass fiber net is influenced. In the heat treatment comparative experiment, it can be found that: the glass fabric which is not subjected to heat treatment has smooth surface, small roughness and regular arrangement, and when the annealing time is 20 minutes, the surface has a plurality of holes and bulges due to hydrogen etching to generate thin boron nitride; when the heat treatment time is 40 minutes, more boron nitride nanotubes are generated on the surface, the diameter is about 20-120 nm, and when the temperature is 60 minutes, cracked cracks appear on the surface; when the treatment temperature was 100 minutes, the breakage was evident.
(2) To enhance the compatibility of the glass fiber web with the polymer, the interfacial strength is enhanced. The hot melt adhesive is prepared by irradiating the surface of the purple perilla seed oil in water to generate hydroxyl, ultrasonically converting the purple perilla seed oil into a fatty acid ester solution A in ethanol, and then carrying out ester exchange reaction on the fatty acid ester solution A and a glass fiber net to graft hydrophobic long fatty chains, so that the compatibility of the glass fiber net and the hot melt adhesive is enhanced, and meanwhile, the hot melt adhesive adopts polypropylene grafted by a maleic acid rod and trimethylolpropane triacrylate as a cross-linking agent to effectively cross-link in the glass fiber net, so that the hot melt adhesive is bonded with an inner layer pipe and an outer layer pipe, and the interface adhesion is enhanced. When the composite pipe is extruded and prepared, the irradiation process is added, and the adhesion of the glass fiber net is improved by modification, so that the fixation of the glass fiber net is ensured and no dislocation is generated when the outer layer pipe is extruded compositely.
(3) The purple perilla seed oil has excellent oxidation resistance and ultraviolet resistance, can effectively enhance the oxidation resistance of the composite pipe, and is certainly lost in the process. The capabilities of polypropylene thermal oxidation, photooxidation and the like are poor, and in order to further improve the service life of the composite tube, the perilla seed oil is firstly extracted from the rosemary leaves to extract the fat-soluble antioxidant, so that compared with the extraction of common solvents such as ethanol and the like, the antioxidant amount of oil extraction is more; and then reacting in ethanol to obtain a fatty acid solution B, wherein the amount of ethanol is less than that of the fatty acid solution A in the process, and a small part of the perilla seed oil is reserved, so that the subsequent dispersion in the polymer is facilitated. The fatty acid solution B is used for surface treatment of the chopped glass fibers, the affinity similar to compatibility among molecules is utilized by the acting force among molecular hydrogen bonds, the short glass fibers are loaded on the chopped glass fibers, the dispersion of the chopped glass fibers in polypropylene plastics is enhanced, the short glass fibers are added in the hot melting process, the ester exchange reaction is generated on the surface, the compatibility is enhanced, and the small part of perilla seed oil reduces the hot melting viscosity of the polymer, so that the homogenization is facilitated.
Compared with the prior art, the invention has the following beneficial effects: (1) pretreating perilla seed oil to obtain a fatty acid solution A and a fatty acid solution B, wherein the fatty acid solution A enhances the compatibility of the glass fiber and the polymer and increases the interfacial viscosity; the fatty acid solution B enhances the dispersibility and compatibility of the chopped fibers and enhances the oxidation resistance of the composite pipe; (2) amorphous silicon dioxide in the glass fiber net is utilized to catalyze and grow the boron nitride nanotube on the surface, so that the through plane thermal conductivity is enhanced, the embedding property of the glass fiber net and a polymer is enhanced, and the mechanical property is enhanced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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:
s1: pretreatment of perilla seed oil: (1) the volume ratio of the perilla seed oil to the ethanol is 1: 12; setting the temperature to be 25 ℃ and reacting for 20 minutes to obtain a fatty acid ester solution A; (2) cleaning and crushing rosemary leaves, uniformly mixing perilla seed oil and the rosemary leaves according to the mass volume ratio of 55%, and stirring and extracting for 1.5 hours at the set temperature of 140 ℃ in the nitrogen atmosphere; the volume ratio of the extract to the ethanol is 1: 7; and (3) carrying out liquid-solid separation, mixing the extract with ethanol, and carrying out ultrasonic reaction for 20 minutes at the set temperature of 25 ℃ to obtain a fatty acid ester solution B.
S2: pretreating a glass fiber net: depositing a boron-containing precursor on a glass fiber net in a vapor phase, setting the gas atmosphere as nitrogen-hydrogen mixed gas in vacuum at high temperature, and carrying out heat treatment at 1200 ℃ for 30 minutes to obtain a boron nitride nanotube/glass fiber net; immersing the glass substrate in water, and irradiating for 20 minutes at a set dose of 85 KGy; transferring the mixture into a fatty acid ester solution A, carrying out oscillation reaction for 11 hours at the set temperature of 115 ℃, and drying to obtain a glass fiber net A.
S3: preparation of polypropylene plastic: (1) placing the chopped glass fiber in concentrated sulfuric acid-hydrogen peroxide for treatment to obtain a chopped glass fiber A; placing the chopped fiber composite in a fatty acid solution B, performing ultrasonic treatment and freeze-drying to obtain a chopped fiber composite; (2) melting and blending polypropylene and propylene-octene copolymer at a set temperature of 160 ℃, adding the chopped fiber compound and tetrabutyl titanate, and homogenizing while hot to obtain a prepreg of polypropylene plastic as an inner-layer pipe material and an outer-layer pipe material;
s4: preparing a hot melt adhesive: melting and blending polypropylene grafted by maleic acid rods, propylene-octene copolymer and trimethylolpropane triacrylate to obtain a hot melt adhesive;
s5: extruding and forming the inner layer pipe material through an extruder at the processing temperature of 200 ℃ and the rotating speed of 18rmp to obtain an inner layer pipe; the hot melt adhesive is arranged in a grinding tool by taking the hot melt adhesive as a model, and the hot melt adhesive is coated on the outer wall of the inner layer pipe through an extruder; setting the processing temperature of the hot melt adhesive at 200 ℃, the extrusion rate at 12rmp, dipping the glass fiber net A into hot melt adhesive, wrapping the outer wall of the inner layer pipe with the hot melt adhesive, connecting the inner layer pipe with the hot melt adhesive, and coating a layer of hot melt adhesive on the glass fiber net A through an extruder; setting the dose as 35KGy and irradiating for 25 minutes to obtain a primary tube; and (4) introducing the outer-layer pipe material into an extruder, and fusing and compounding the outer-layer pipe material with the outer wall of the primary pipe to obtain the composite pipe.
In this embodiment, the polypropylene plastic comprises the following raw materials: 105 parts of polypropylene, 18 parts of propylene-octene copolymer, 14 parts of chopped glass fiber and 28 parts of perilla seed oil. The raw materials of the hot melt adhesive comprise the following components: 42 parts of maleic stem grafted polypropylene, 16 parts of propylene-octene copolymer and 8 parts of trimethylolpropane triacrylate.
Example 2:
s1: pretreatment of perilla seed oil: (1) the volume ratio of the perilla seed oil to the ethanol is 1: 10; setting the temperature to be 22 ℃ and reacting for 15 minutes to obtain a fatty acid ester solution A; (2) cleaning and crushing rosemary leaves, uniformly mixing perilla seed oil and the rosemary leaves according to the mass volume ratio of 40%, and stirring and extracting for 1 hour at the set temperature of 105 ℃ in the nitrogen atmosphere; the volume ratio of the extract to the ethanol is 1: 6; and (3) carrying out liquid-solid separation, mixing the extract with ethanol, and carrying out ultrasonic reaction for 15 minutes at the temperature of 22 ℃ to obtain a fatty acid ester solution B.
S2: pretreating a glass fiber net: depositing a boron-containing precursor on a glass fiber net in a vapor phase manner, setting the gas atmosphere as nitrogen-hydrogen mixed gas in vacuum high temperature, and carrying out heat treatment at 1100 ℃ for 20 minutes to obtain a boron nitride nanotube/glass fiber net; immersing the glass fiber reinforced plastic in water, and irradiating for 15 minutes at a set dose of 80 KGy; transferring the mixture into a fatty acid ester solution A, setting the temperature to be 110 ℃, carrying out oscillation reaction for 10 hours, and drying to obtain a glass fiber net A.
S3: preparation of polypropylene plastic: (1) placing the chopped glass fiber in concentrated sulfuric acid-hydrogen peroxide for treatment to obtain a chopped glass fiber A; placing the chopped fiber composite in a fatty acid solution B, performing ultrasonic treatment and freeze-drying to obtain a chopped fiber composite; (2) melting and blending polypropylene and propylene-octene copolymer at a set temperature of 150 ℃, adding the chopped fiber compound and tetrabutyl titanate, and homogenizing while hot to obtain a prepreg of polypropylene plastic as an inner-layer pipe material and an outer-layer pipe material;
s4: preparing a hot melt adhesive: melting and blending polypropylene grafted by maleic acid rods, propylene-octene copolymer and trimethylolpropane triacrylate to obtain a hot melt adhesive;
s5: extruding the inner layer pipe material through an extruder at the processing temperature of 180 ℃ and the rotating speed of 15rmp to obtain an inner layer pipe; the hot melt adhesive is arranged in a grinding tool by taking the hot melt adhesive as a model, and the hot melt adhesive is coated on the outer wall of the inner layer pipe through an extruder; setting the processing temperature of the hot melt adhesive at 160 ℃, the extrusion rate at 10rmp, dipping the glass fiber net A into hot melt adhesive, wrapping the outer wall of the inner layer pipe with the hot melt adhesive, connecting the inner layer pipe with the hot melt adhesive, and coating a layer of hot melt adhesive on the glass fiber net A through an extruder; setting the dose to be 9KGy and irradiating for 30 minutes to obtain a primary tube; and (4) introducing the outer-layer pipe material into an extruder, and fusing and compounding the outer-layer pipe material with the outer wall of the primary pipe to obtain the composite pipe.
In this embodiment, the polypropylene plastic comprises the following raw materials: 100 parts of polypropylene, 15 parts of propylene-octene copolymer, 12 parts of chopped glass fiber and 22 parts of perilla seed oil. The raw materials of the hot melt adhesive comprise the following components: 35 parts of maleic stem grafted polypropylene, 15 parts of propylene-octene copolymer and 5 parts of trimethylolpropane triacrylate.
Example 3:
s1: pretreatment of perilla seed oil: (1) the volume ratio of the perilla seed oil to the ethanol is 1: 15; setting the temperature to be 28 ℃ and reacting for 25 minutes to obtain a fatty acid ester solution A; (2) cleaning and crushing rosemary leaves, uniformly mixing perilla seed oil and the rosemary leaves according to the mass volume ratio of 60%, and stirring and extracting for 3 hours at the set temperature of 42 ℃ in the nitrogen atmosphere; the volume ratio of the extract to the ethanol is 1: 8; and (3) carrying out liquid-solid separation, mixing the extract with ethanol, and carrying out ultrasonic reaction for 25 minutes at the temperature of 22-28 ℃ to obtain a fatty acid ester solution B.
S2: pretreating a glass fiber net: depositing a boron-containing precursor on a glass fiber net in a vapor phase manner, setting the gas atmosphere as nitrogen-hydrogen mixed gas in vacuum high temperature, and carrying out heat treatment at 1150 ℃ for 40 minutes to obtain a boron nitride nanotube/glass fiber net; immersing the glass fiber reinforced plastic in water, and irradiating for 30 minutes at a set dose of 90 KGy; transferring the mixture into a fatty acid ester solution A, setting the temperature at 120 ℃, carrying out oscillation reaction for 12 hours, and drying to obtain a glass fiber net A.
S3: preparation of polypropylene plastic: (1) placing the chopped glass fiber in concentrated sulfuric acid-hydrogen peroxide for treatment to obtain a chopped glass fiber A; placing the chopped fiber composite in a fatty acid solution B, performing ultrasonic treatment and freeze-drying to obtain a chopped fiber composite; (2) melting and blending polypropylene and propylene-octene copolymer at 180 ℃, adding chopped fiber compound and tetrabutyl titanate, and homogenizing while hot to obtain a polypropylene plastic prepreg serving as an inner-layer pipe material and an outer-layer pipe material;
s4: preparing a hot melt adhesive: melting and blending polypropylene grafted by maleic acid rods, propylene-octene copolymer and trimethylolpropane triacrylate to obtain a hot melt adhesive;
s5: extruding and forming the inner layer pipe material by an extruder at the processing temperature of 240 ℃ and the rotating speed of 20rmp to obtain an inner layer pipe; the hot melt adhesive is arranged in a grinding tool by taking the hot melt adhesive as a model, and the hot melt adhesive is coated on the outer wall of the inner layer pipe through an extruder; setting the processing temperature of the hot melt adhesive at 210 ℃ and the extrusion rate at 15rmp, soaking the glass fiber net A in the hot melt adhesive, wrapping the glass fiber net A on the outer wall of the inner-layer pipe, connecting the glass fiber net A with the hot melt adhesive, and coating a layer of the hot melt adhesive on the glass fiber net A through an extruder; setting the dose as 50KGy and irradiating for 20 minutes to obtain a primary tube; and (4) introducing the outer-layer pipe material into an extruder, and fusing and compounding the outer-layer pipe material with the outer wall of the primary pipe to obtain the composite pipe.
In this embodiment, the polypropylene plastic comprises the following raw materials: 110 parts of polypropylene, 20 parts of propylene-octene copolymer, 16 parts of chopped glass fiber and 32 parts of perilla seed oil. The raw materials of the hot melt adhesive comprise the following components: 50 parts of polypropylene grafted by maleic acid rods, 20 parts of propylene-octene copolymer and 10 parts of trimethylolpropane triacrylate.
Example 4: the glass fiber web was not heat treated; the rest is the same as in example 1.
Example 5: treating the glass fiber web without using the fatty acid ester solution a; the rest is the same as in example 1.
Example 6: treating the chopped glass fibers without using the fatty acid ester solution B; the rest is the same as in example 1.
Example 7: in step S5, no irradiation treatment is performed; otherwise, the same as example 1;
example 8: treating the chopped glass fibers with a fatty acid ester solution A; the rest is the same as in example 1.
Example 9: the fatty acid ester solution B is prepared by extracting rosemary leaf with the fatty acid ester solution A; the rest is the same as in example 1.
The method comprises the following specific steps: washing and grinding rosemary leaves, uniformly mixing perilla seed oil and a fatty acid ester solution A according to the mass volume ratio of 55%, refluxing for 3 hours at the set temperature of 55 ℃, and performing liquid-solid separation to obtain a fatty acid ester solution B.
Experiment: taking the polypropylene glass fiber net composite tube prepared in the embodiment 1-9, testing the tensile strength of the composite tube according to the GB/T1040.2-2006 standard, and testing the impact strength of the composite tube according to GB/T14152; testing the interfacial shear strength of the composite tube according to a polymer micro-droplet debonding method; referring to CJ/T258-2014, the heat distortion temperature of the composite tube was tested under flexural rechecking using a heat distortion gauge; aging the composite pipe for 1000 hours at 150 ℃, detecting the tensile strength of the composite pipe after aging to obtain the tensile strength 2, and detecting the ageing resistance. The results obtained are shown in the following table:
and (4) conclusion: in combination with the data of examples 1 to 3, it can be found that: the prepared composite pipe has excellent mechanical property, heat resistance and aging resistance, and the preferred scheme is the scheme of example 1.
Comparing the data of example 4 and example 1, it can be seen that all the data are degraded due to: in example 1, the boron nitride nanotubes are grown on the surface of the glass fiber mesh, and the thermal conductivity of the boron nitride nanotubes is utilized to significantly enhance the planar thermal conductivity of the composite tube, so that the heat-conducting network is formed by the chopped fibers in the inner and outer layer tubes, and the heat resistance of the composite tube is significantly enhanced; meanwhile, as the surface of the surface boron nitride nanotube extends, the stress transfer can be enhanced, the absorption of impact force is increased, and the mechanical property is enhanced; and because the glass fiber grows on the surface, the roughness of the surface of the glass fiber is increased, so that the chimerism of the glass fiber and a polymer is enhanced, and the interface strength is increased.
Comparing the data of example 5 and example 1, it can be seen that there is a decrease in the data of mechanical properties due to: in example 5, hydrophobic long fatty chains are not grafted on the surface of the glass fiber net, so that the compatibility of the interface is reduced. Similarly, in example 6, since the chopped glass fibers are not treated, the interface compatibility is reduced, so that the mechanical property of the composite tube is improved, and meanwhile, due to poor unmodified dispersibility, stress concentration is generated, and the stress mechanical property is reduced more than that in example 5; since the hot melt adhesive in example 5 crosslinks in the glass fiber web, the adhesion was increased to some extent. In addition, the data of comparative example 7 shows that the mechanical properties of the non-irradiated polypropylene fiber tube are also slightly reduced due to the following reasons: the irradiation process is modified to improve the adhesion of the glass fiber net, so that the fixation of the glass fiber net is ensured and no dislocation is generated when the outer layer pipe is compositely extruded.
Comparing the data of example 8 and example 1, it can be found that the magnitude of the decrease in tensile strength 2 is greater due to the decrease in oxidation resistance, specifically: since the antioxidant in rosemary leaves was not extracted in example 8, it was used in the compounding tube. Comparative example the data of comparative example 9, however, still show a decrease in oxidation resistance due to: compared with the extraction of perilla seed oil, the fat-soluble antioxidant in the rosemary leaves extracted by the fatty acid ester solution A contains a mixture of excessive ethanol and the perilla seed oil, the extraction content of the antioxidant is reduced during the extraction, so that the content of the antioxidant finally adhered to the chopped fibers is reduced, and meanwhile, the reaction ratio of the ethanol to the perilla seed oil in the fatty acid ester solution B is reduced, and the loss of the antioxidant is reduced. Therefore, the order of extraction and reaction cannot be changed.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A polypropylene glass fiber net composite pipe is characterized in that: the composite pipe sequentially comprises an inner layer pipe, a glass fiber net and an outer layer pipe from inside to outside; the glass fiber is bonded with the inner layer pipe and the outer layer pipe through hot melt adhesive; the outer layer pipe and the inner layer pipe are both made of polypropylene plastics, and the polypropylene plastics comprise the following raw materials: 100-110 parts of polypropylene, 15-20 parts of propylene-octene copolymer, 12-16 parts of chopped glass fiber and 22-32 parts of perilla seed oil.
2. The polypropylene glass fiber web composite pipe as claimed in claim 1, wherein: the raw materials of the hot melt adhesive comprise the following components: 35-50 parts of maleic-stem-grafted polypropylene, 15-20 parts of propylene-octene copolymer and 5-10 parts of trimethylolpropane triacrylate.
3. The polypropylene glass fiber web composite pipe as claimed in claim 1, wherein: the glass fiber net is a high silica glass fiber net; boron nitride nanotubes grow on the surface of the glass fiber net.
4. A preparation method of a polypropylene glass fiber net composite pipe is characterized by comprising the following steps: the method comprises the following steps:
s1: pretreatment of perilla seed oil: (1) mixing perilla seed oil with ethanol, and performing ultrasonic reaction to obtain a fatty acid ester solution A; (2) crushing rosemary leaves, extracting in perilla seed oil, carrying out liquid-solid separation, mixing an extract and ethanol, and carrying out ultrasonic reaction to obtain a fatty acid ester solution B;
s2: pretreating a glass fiber net: vapor-depositing the boron-containing precursor on the glass fiber net, and facilitating vacuum high-temperature heat treatment to obtain the boron nitride nanotube/glass fiber net; soaking in water, and irradiating; transferring the mixture into a fatty acid ester solution A, dipping, carrying out oscillation reaction, and drying to obtain a glass fiber net A;
s3: preparation of polypropylene plastic: (1) placing the chopped glass fiber in concentrated sulfuric acid-hydrogen peroxide for treatment to obtain a chopped glass fiber A; placing the chopped fiber composite in a fatty acid solution B, performing ultrasonic treatment and freeze-drying to obtain a chopped fiber composite; (2) melting and blending polypropylene and propylene-octene copolymer, adding chopped fiber compound and tetrabutyl titanate, homogenizing while hot to obtain a prepreg of polypropylene plastic, which is used as an inner-layer pipe material and an outer-layer pipe material;
s4: preparing a hot melt adhesive: melting and blending polypropylene grafted by maleic acid rods, propylene-octene copolymer and trimethylolpropane triacrylate to obtain a hot melt adhesive;
s5: extruding and molding the inner layer pipe material through an extruder to obtain an inner layer pipe; polishing the surface of the inner tube, setting the inner tube in a grinding tool by taking the inner tube as a model, and coating the hot melt adhesive on the outer wall of the inner tube through an extruder; soaking the glass fiber net A in hot melt adhesive to wrap the outer wall of the inner layer pipe, connecting the glass fiber net A with the hot melt adhesive, and coating a layer of hot melt adhesive on the glass fiber net A through an extruder; irradiating to obtain a primary tube; and (4) introducing the outer-layer pipe material into an extruder, and fusing and compounding the outer-layer pipe material with the outer wall of the primary pipe to obtain the composite pipe.
5. The method for preparing the polypropylene glass fiber net composite pipe as claimed in claim 4, wherein the method comprises the following steps: in the step (1) of S1, the volume ratio of the perilla seed oil to the ethanol is 1 (10-15); the ultrasonic reaction temperature is 22-28 ℃, and the reaction time is 15-25 minutes.
6. The method for preparing the polypropylene glass fiber net composite pipe as claimed in claim 4, wherein the method comprises the following steps: in the step (2) of S1, the mass-volume ratio of the perilla seed oil to the rosemary leaves is 40-60%; extraction conditions are as follows: stirring and extracting for 1-3 hours at 105-142 ℃ in a nitrogen atmosphere; the volume ratio of the extract to the ethanol is 1 (6-8), the ultrasonic reaction temperature is 22-28 ℃, and the reaction time is 15-25 minutes.
7. The method for preparing the polypropylene glass fiber net composite pipe as claimed in claim 4, wherein the method comprises the following steps: in step S2, the boron-containing precursor is prepared by reacting diboron trioxide, magnesium and potassium borohydride; and (3) heat treatment conditions: the temperature is 1100-1200 ℃, the gas atmosphere is nitrogen-hydrogen mixed gas, and the time is 20-40 minutes.
8. The method for preparing the polypropylene glass fiber net composite pipe as claimed in claim 4, wherein the method comprises the following steps: in step S2, irradiation conditions: the dose is 80-90 KGy, and the irradiation time is 15-30 minutes; oscillating the reaction conditions: the temperature is 110-120 ℃, and the time is 10-12 hours.
9. The method for preparing the polypropylene glass fiber net composite pipe as claimed in claim 4, wherein the method comprises the following steps: in the step S3, the melting temperature is 150-180 ℃.
10. The method for preparing the polypropylene glass fiber net composite pipe as claimed in claim 4, wherein the method comprises the following steps: in the step S5, the processing temperature of the inner-layer pipe material is 180-240 ℃, and the rotating speed of the extruder is 15-20 rmp; the processing temperature of the hot melt adhesive is 160-210 ℃, and the extrusion rate is 10-15 rmp; the processing temperature of the outer-layer pipe material is 200-260 ℃, and the extrusion rate is 15-20 rmp; the irradiation conditions were: the dosage is 9-50 KGy, and the time is 20-30 minutes.
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