CN111098557B - High-strength flame-retardant silicon core pipe and preparation method thereof - Google Patents
High-strength flame-retardant silicon core pipe and preparation method thereof Download PDFInfo
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- CN111098557B CN111098557B CN201911401408.9A CN201911401408A CN111098557B CN 111098557 B CN111098557 B CN 111098557B CN 201911401408 A CN201911401408 A CN 201911401408A CN 111098557 B CN111098557 B CN 111098557B
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- density polyethylene
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 89
- 238000002360 preparation method Methods 0.000 title abstract description 11
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 69
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 56
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 54
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 54
- 239000002994 raw material Substances 0.000 claims abstract description 53
- 239000002131 composite material Substances 0.000 claims abstract description 49
- 239000012767 functional filler Substances 0.000 claims abstract description 30
- 239000006057 Non-nutritive feed additive Substances 0.000 claims abstract description 16
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 13
- -1 polydimethylsiloxane Polymers 0.000 claims abstract description 10
- 239000004205 dimethyl polysiloxane Substances 0.000 claims abstract description 7
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims abstract description 7
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 42
- 239000004917 carbon fiber Substances 0.000 claims description 42
- 238000003756 stirring Methods 0.000 claims description 35
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 31
- 238000002156 mixing Methods 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims description 18
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 15
- 239000001913 cellulose Substances 0.000 claims description 15
- 229920002678 cellulose Polymers 0.000 claims description 15
- 229910017604 nitric acid Inorganic materials 0.000 claims description 15
- 238000005406 washing Methods 0.000 claims description 15
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 239000011259 mixed solution Substances 0.000 claims description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 11
- HHDUMDVQUCBCEY-UHFFFAOYSA-N 4-[10,15,20-tris(4-carboxyphenyl)-21,23-dihydroporphyrin-5-yl]benzoic acid Chemical compound OC(=O)c1ccc(cc1)-c1c2ccc(n2)c(-c2ccc(cc2)C(O)=O)c2ccc([nH]2)c(-c2ccc(cc2)C(O)=O)c2ccc(n2)c(-c2ccc(cc2)C(O)=O)c2ccc1[nH]2 HHDUMDVQUCBCEY-UHFFFAOYSA-N 0.000 claims description 9
- CTENFNNZBMHDDG-UHFFFAOYSA-N Dopamine hydrochloride Chemical compound Cl.NCCC1=CC=C(O)C(O)=C1 CTENFNNZBMHDDG-UHFFFAOYSA-N 0.000 claims description 9
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000005303 weighing Methods 0.000 claims description 9
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 claims description 8
- 239000003963 antioxidant agent Substances 0.000 claims description 8
- 230000003078 antioxidant effect Effects 0.000 claims description 8
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000013329 compounding Methods 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 229940075507 glyceryl monostearate Drugs 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 239000001788 mono and diglycerides of fatty acids Substances 0.000 claims description 6
- 230000007935 neutral effect Effects 0.000 claims description 6
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 claims description 6
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 claims description 6
- 239000000047 product Substances 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 6
- 238000009210 therapy by ultrasound Methods 0.000 claims description 6
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 claims description 3
- QKNYBSVHEMOAJP-UHFFFAOYSA-N 2-amino-2-(hydroxymethyl)propane-1,3-diol;hydron;chloride Chemical compound Cl.OCC(N)(CO)CO QKNYBSVHEMOAJP-UHFFFAOYSA-N 0.000 claims description 3
- 238000007865 diluting Methods 0.000 claims description 3
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000008098 formaldehyde solution Substances 0.000 claims description 3
- 238000004108 freeze drying Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 239000007853 buffer solution Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims 1
- 239000011159 matrix material Substances 0.000 abstract description 17
- 238000004891 communication Methods 0.000 abstract description 10
- 230000003287 optical effect Effects 0.000 abstract description 7
- 239000010410 layer Substances 0.000 description 77
- 238000002485 combustion reaction Methods 0.000 description 9
- 229920000642 polymer Polymers 0.000 description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- 125000000896 monocarboxylic acid group Chemical group 0.000 description 4
- 238000000197 pyrolysis Methods 0.000 description 4
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000006683 Mannich reaction Methods 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000008119 colloidal silica Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 239000012796 inorganic flame retardant Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- PRWJPWSKLXYEPD-UHFFFAOYSA-N 4-[4,4-bis(5-tert-butyl-4-hydroxy-2-methylphenyl)butan-2-yl]-2-tert-butyl-5-methylphenol Chemical compound C=1C(C(C)(C)C)=C(O)C=C(C)C=1C(C)CC(C=1C(=CC(O)=C(C=1)C(C)(C)C)C)C1=CC(C(C)(C)C)=C(O)C=C1C PRWJPWSKLXYEPD-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- XKCQNWLQCXDVOP-UHFFFAOYSA-N tris(2-chloropropan-2-yl) phosphate Chemical compound CC(C)(Cl)OP(=O)(OC(C)(C)Cl)OC(C)(C)Cl XKCQNWLQCXDVOP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- 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
-
- 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
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/02—2 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
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
- B32B2250/242—All polymers belonging to those covered by group B32B27/32
-
- 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
- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/329—Phosphorus containing acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a high-strength flame-retardant silicon core pipe which is of a double-layer pipe structure and comprises an inner layer and an outer layer, wherein the outer layer is prepared from the following raw materials in parts by weight: 70-80 parts of high-density polyethylene, 9-13 parts of maleic anhydride grafted high-density polyethylene, 3-4 parts of functional filler, 2-3 parts of composite flame retardant and 2-3 parts of processing aid; the inner layer is prepared from the following raw materials in parts by weight: 60-70 parts of high-density polyethylene, 0.8-1 part of composite flame retardant and 4-5 parts of polydimethylsiloxane; the invention also discloses a preparation method of the silicon core tube. The silicon core pipe has a double-layer pipe structure, adopts high-density polyethylene as a matrix, and is added with functional filler and a composite flame retardant, and the functional filler can improve the strength and the mechanical property of an outer-layer pipe; the composite flame retardant improves the flame retardant property of the outer layer of the silicon core pipe, so that the silicon core pipe with high strength and excellent flame retardant property is obtained, has extremely high use safety performance, and is suitable for optical cable communication network systems.
Description
Technical Field
The invention belongs to the technical field of silicon core tubes, and particularly relates to a high-strength flame-retardant silicon core tube and a preparation method thereof.
Background
The silicon core pipe is a novel composite pipeline with the inner wall provided with the colloidal silica solid lubricant, has good sealing performance, chemical corrosion resistance and low engineering cost, is widely applied to optical cable communication network systems of highways, railways and the like, and the HDPE silicon core pipe is a novel composite pipeline with the inner wall provided with the colloidal silica solid lubricant, and is called a silicon pipe for short. The composite material is extruded and compounded by three plastic extruders synchronously, the main raw material is high-density polyethylene, and the core layer is solid lubricant silica gel with the lowest friction coefficient. The method is widely applied to optical cable communication network systems. The silicon core tube needs to have flame retardant performance, otherwise when the short circuit of inside cable takes place, very easily causes the burning phenomenon, influences safety in utilization.
Chinese patent No. CN02112744.1 discloses a special material for halogen-free flame-retardant silicon core tube and its preparation method, wherein the disclosed components contain 25-45% of composite halogen-free flame retardant (ANT-6/Mg (OH))2) The main component of the composite halogen-free flame retardant is powdery metal hydrate, which belongs to one of mineral substances; because the powdery mineral has the characteristic of poor dispersion; therefore, after the halogen-free flame retardant is added into a silicon core pipe as a main component, the halogen-free flame retardant is unevenly dispersed in the component, so that the problems of poor mechanical property, high hardness and high brittleness of the finished product of the flame-retardant silicon core pipe are caused.
Disclosure of Invention
The invention aims to provide a high-strength flame-retardant silicon core pipe and a preparation method thereof, wherein the silicon core pipe is of a double-layer pipe structure, the outer layer adopts high-density polyethylene as a matrix, functional filler and a composite flame retardant are added, and the functional filler can be uniformly distributed in an HDPE matrix after being modified, so that the strength and the mechanical property of the outer-layer pipe are improved; the composite flame retardant not only has multi-level flame retardant performance, but also has good compatibility with a matrix, can be uniformly distributed in the matrix, improves the flame retardant performance of the outer layer of the silicon core tube, and effectively resists external combustion; the composite flame retardant is also added into the inner layer material, so that the combustion phenomenon caused by short circuit of a cable arranged inside the silicon core pipe can be effectively prevented, and the use safety of the silicon core pipe is improved; the silicon core tube prepared by the invention has high strength and excellent flame retardant property, has extremely high use safety performance, and is suitable for optical cable communication network systems.
The purpose of the invention can be realized by the following technical scheme
The high-strength flame-retardant silicon core pipe is of a double-layer pipe structure and comprises an inner layer and an outer layer, wherein the outer layer is prepared from the following raw materials in parts by weight: 70-80 parts of high-density polyethylene, 9-13 parts of maleic anhydride grafted high-density polyethylene, 3-4 parts of functional filler, 2-3 parts of composite flame retardant and 2-3 parts of processing aid;
the inner layer is prepared from the following raw materials in parts by weight: 60-70 parts of high-density polyethylene, 0.8-1 part of composite flame retardant and 4-5 parts of polydimethylsiloxane.
Further, the processing aid comprises oleamide, glyceryl monostearate and an antioxidant, wherein the mass ratio of the oleamide to the glyceryl monostearate to the antioxidant is 1:1: 0.5.
Further, the functional filler is prepared by the following method:
(1) weighing carbon fibers, dispersing the carbon fibers in dilute nitric acid, stirring for 10-12h at 75 ℃, filtering and washing to be neutral, then stirring the carbon fibers washed by the dilute nitric acid in a mixed solution of concentrated sulfuric acid and concentrated nitric acid for 20-22h at 60 ℃, repeatedly diluting, standing, washing with deionized water to be neutral, and centrifugally filtering to obtain pretreated carbon fibers;
(2) weighing 1g of pretreated carbon fiber, placing the pretreated carbon fiber in 500mL of deionized water, performing water bath ultrasonic treatment for 12h, and performing probe ultrasonic treatment for 13-15 min;
(3) pouring the obtained suspension into 500mL of Tris-HCl buffer solution, then adding 0.57g of 3, 4-dihydroxyphenethylamine hydrochloride, and stirring at room temperature for 120-130 min;
(4) centrifuging the suspension at 7500rpm for 20-25min, washing the slurry with acetone, centrifuging to remove solvent, repeating washing and centrifuging steps for 4-5 times, and freeze drying the precipitate for 48h to obtain functional filler;
further, the volume ratio of the concentrated sulfuric acid to the concentrated nitric acid in the mixed solution of the concentrated sulfuric acid and the concentrated nitric acid in the step (1) is 3: 1.
further, the composite flame retardant is prepared by the following method:
(1) adding 200-250mL of 5 mass percent NaOH solution and 30g of cellulose into a round-bottom three-mouth flask, stirring at the normal temperature at 150r/min for 26-30min, heating to 92-94 ℃, adding 24-28mL of formaldehyde solution, and stirring for reacting for 60-70 min;
(2) weighing 11.8-12.4g of p-phenylenediamine, adding the p-phenylenediamine into the mixed solution, and continuously stirring for reaction at the temperature of 92-94 ℃ for 120-130 min;
(3) adding 25-27g of TCPP and 300mg of sodium dodecyl benzene sulfonate into the reaction solution, and stirring for 3Adding 22.6-22.9g of aluminum nitrate into the mixed solution after 0min, stirring, reacting for 30min, and then dropwise adding 7.7-7.8g of H3PO4Continuing to react for 30 min;
(4) and standing the product at room temperature for 12h, filtering, washing, drying at 80 ℃ to constant volume, grinding, and sieving with a 200-mesh sieve to obtain the composite flame retardant.
A preparation method of a high-strength flame-retardant silicon core tube comprises the following steps:
firstly, mixing maleic anhydride grafted high-density polyethylene, functional filler, composite flame retardant, processing aid and 1/5 high-density polyethylene in outer layer raw materials, heating to 120-130 ℃, stirring and mixing for 25-30min, then adding the rest high-density polyethylene, continuously mixing for 40-50min at 120-130 ℃, and cooling to below 50 ℃ for later use;
thirdly, taking the raw materials of the inner layer, heating to 105-120 ℃, stirring and mixing for 40-50min, and cooling to below 50 ℃ for later use;
step four, respectively heating and melting the outer layer raw material and the inner layer raw material, and then synchronously extruding and compounding the raw materials through two extruders to obtain a silicon core tube blank, wherein the temperature during extrusion is controlled to be 175-185 ℃;
and fifthly, performing vacuum shaping, cooling, traction and coiling on the silicon core pipe blank to obtain the silicon core pipe.
The invention has the advantages of
The functional filler is added into the outer raw material of the silicon core tube, the functional filler is prepared by modifying carbon fiber, after the carbon fiber is subjected to acidification treatment by sulfuric acid and nitric acid, OH on the surface of a molecule is oxidized into COOH, and the COOH can react with OH on a 3, 4-dihydroxyphenylethylamine hydrochloride molecule, so that the 3, 4-dihydroxyphenylethylamine hydrochloride is grafted on the carbon fiber, and then the 3, 4-dihydroxyphenylethylamine hydrochloride is subjected to polymerization reaction on the surface of the carbon fiber to form a layer of polymer which is attached to the surface of the carbon fiber and polymerized on the surface of the carbon fiber to form a layer of polymer, wherein the polymer layer has good compatibility with HDPE, so that the carbon fiber can be uniformly dispersed in an HDPE matrix, and the dispersibility of the carbon fiber is improved; the Carbon Fiber (CF) has the characteristics of high strength and modulus, low density, small linear expansion coefficient and the like, the Young modulus of the carbon fiber is more than 3 times that of the glass fiber, but the density is only 2/3 of the carbon fiber, and the carbon fiber is uniformly dispersed in the HDPE matrix, so that the reinforcing effect can be effectively exerted, and the strength of the pipe is improved;
the composite flame retardant, namely-NH on p-phenylenediamine, is added into the raw materials of the outer layer and the inner layer of the silicon core tube2Reacting with-OH on the surface of cellulose molecules, grafting the cellulose molecules onto the cellulose molecules, carrying out Mannich reaction on the cellulose molecules and formaldehyde to generate a prepolymer on the surface of the cellulose, and preparing a composite flame retardant by a reverse precipitation method, wherein the composite flame retardant contains TCPP, aluminum phosphate and other effective components and has a multi-layer flame retardant effect; TCPP is used as a phosphorus-halogen synergistic flame retardant, phosphoric anhydride or phosphoric acid with strong dehydration effect is generated through pyrolysis, and the phosphoric anhydride or the phosphoric acid can promote cellulose dehydration to form a compact carbon layer to cover the surface of the base material; meanwhile, the pyrolysis of the aluminum phosphate can also dilute the temperature of the combustion zone, and the formed alumina covers the surface of the matrix material, so that an excellent flame retardant effect is achieved under the combined action of the carbon layer and the alumina; in addition, the outer layer of the composite flame retardant has a polymer molecular chain, the polymer molecular chain also has a benzene ring and a carbon chain, and the composite flame retardant has good compatibility with a polyethylene matrix, can overcome the defect that an inorganic flame retardant is difficult to disperse, is uniformly distributed in a pipe, and fully exerts the flame retardant property; the outer layer and the inner layer are both added with a flame retardant, the outer layer has flame retardant performance and can effectively resist external combustion, the inner layer has flame retardant performance, the combustion phenomenon caused by short circuit of an internal cable arranged inside the silicon core pipe can be effectively prevented, and the use safety of the silicon core pipe is improved;
the silicon core pipe has a double-layer pipe structure, the outer layer adopts high-density polyethylene as a matrix, functional filler and composite flame retardant are added, and the functional filler can be uniformly distributed in the HDPE matrix after modification treatment, so that the strength and the mechanical property of the outer-layer pipe are improved; the composite flame retardant not only has multi-level flame retardant performance, but also has good compatibility with a matrix, can be uniformly distributed in the matrix, improves the flame retardant performance of the outer layer of the silicon core tube, and effectively resists external combustion; the composite flame retardant is also added into the inner layer material, so that the combustion phenomenon caused by short circuit of a cable arranged inside the silicon core pipe can be effectively prevented, and the use safety of the silicon core pipe is improved; the silicon core tube prepared by the invention has high strength and excellent flame retardant property, has extremely high use safety performance, and is suitable for optical cable communication network systems.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A high-strength flame-retardant silicon core pipe is of a double-layer pipe structure and comprises an inner layer and an outer layer;
the outer layer is prepared from the following raw materials in parts by weight: 70-80 parts of high-density polyethylene (HDPE), 9-13 parts of maleic anhydride grafted high-density polyethylene, 3-4 parts of functional filler, 2-3 parts of composite flame retardant and 2-3 parts of processing aid;
the inner layer is prepared from the following raw materials in parts by weight: 60-70 parts of high-density polyethylene, 0.8-1 part of composite flame retardant and 4-5 parts of polydimethylsiloxane;
the processing aid comprises oleamide, glyceryl monostearate and an antioxidant, wherein the mass ratio of the oleamide to the glyceryl monostearate to the antioxidant is 1:1: 0.5; the antioxidant is common antioxidant for polyethylene, such as antioxidant 1076, antioxidant CA, etc.;
the functional filler is prepared by the following method:
(1) weighing carbon fibers, dispersing the carbon fibers in dilute nitric acid, stirring for 10-12h at 75 ℃, filtering and washing to be neutral, then stirring the carbon fibers subjected to dilute nitric acid pickling in a mixed solution of concentrated sulfuric acid and concentrated nitric acid (volume ratio is 3: 1) for 20-22h at 60 ℃, repeatedly diluting and standing the product, washing the product to be neutral by deionized water, and performing centrifugal filtration to obtain pretreated carbon fibers;
(2) weighing 1g of pretreated carbon fiber, placing the pretreated carbon fiber in 500mL of deionized water, performing water bath ultrasonic treatment for 12h, and performing probe ultrasonic treatment for 13-15 min;
(3) the obtained suspension was poured into 500mL of Tris-HCl buffer (pH 8.5), then 0.57g of 3, 4-dihydroxyphenethylamine hydrochloride was added, and stirred at room temperature for 120-;
(4) centrifuging the suspension at 7500rpm for 20-25min, washing the slurry with acetone, centrifuging to remove solvent, repeating washing and centrifuging steps for 4-5 times, and freeze drying the precipitate for 48h to obtain functional filler;
after the carbon fiber is acidified by sulfuric acid and nitric acid, OH on the surface of the molecule is oxidized into COOH, the COOH can react with OH on the molecule of 3, 4-dihydroxyphenylethylamine hydrochloride, so that the 3, 4-dihydroxyphenylethylamine hydrochloride is grafted on the carbon fiber, and the 3, 4-dihydroxyphenylethylamine hydrochloride is subjected to polymerization reaction on the surface of the carbon fiber to form a layer of polymer which is attached to the surface of the carbon fiber and polymerized on the surface of the carbon fiber to form a layer of polymer; the Carbon Fiber (CF) has the characteristics of high strength and modulus, low density, small linear expansion coefficient and the like, the Young modulus of the carbon fiber is more than 3 times that of the glass fiber, but the density is only 2/3 of the carbon fiber, and the carbon fiber is uniformly dispersed in the HDPE matrix, so that the reinforcing effect can be effectively exerted, and the strength of the pipe is improved;
the composite flame retardant is prepared by the following method:
(1) adding 200-250mL of 5 mass percent NaOH solution and 30g of cellulose into a round-bottom three-mouth flask, stirring at the normal temperature at 150r/min for 26-30min, heating to 92-94 ℃, adding 24-28mL of formaldehyde solution, and stirring for reacting for 60-70 min;
(2) weighing 11.8-12.4g of p-phenylenediamine, adding the p-phenylenediamine into the mixed solution, and continuously stirring for reaction at the temperature of 92-94 ℃ for 120-130 min;
(3) adding 25-27g of TCPP (tris (chloroisopropyl) phosphate) and 300mg of sodium dodecyl benzene sulfonate into the reaction solution, stirring for 30min, then adding 22.6-22.9g of aluminum nitrate into the mixed solution, stirring, reacting for 30min, and then dropwise adding 7.7-7.8g of H3PO4Continuing to react for 30 min;
(4) standing the product at room temperature for 12h, filtering, washing, drying at 80 ℃ to constant volume, grinding, and sieving with a 200-mesh sieve to obtain the composite flame retardant;
-NH on p-phenylenediamine2Reacting with-OH on the surface of cellulose molecules, grafting the cellulose molecules onto the cellulose molecules, carrying out Mannich reaction on the cellulose molecules and formaldehyde to generate a prepolymer on the surface of the cellulose, and preparing a composite flame retardant by a reverse precipitation method, wherein the composite flame retardant contains TCPP, aluminum phosphate and other effective components and has a multi-layer flame retardant effect; TCPP is used as a phosphorus-halogen synergistic flame retardant, phosphoric anhydride or phosphoric acid with strong dehydration effect is generated through pyrolysis, and the phosphoric anhydride or the phosphoric acid can promote cellulose dehydration to form a compact carbon layer to cover the surface of the base material; meanwhile, the pyrolysis of the aluminum phosphate can also dilute the temperature of the combustion zone, and the formed alumina covers the surface of the matrix material, so that an excellent flame retardant effect is achieved under the combined action of the carbon layer and the alumina; in addition, the outer layer of the composite flame retardant has a polymer molecular chain, the polymer molecular chain also has a benzene ring and a carbon chain, and the composite flame retardant has good compatibility with a polyethylene matrix, can overcome the defect that an inorganic flame retardant is difficult to disperse, is uniformly distributed in a pipe, and fully exerts the flame retardant property;
the preparation method of the silicon core tube comprises the following steps:
firstly, mixing maleic anhydride grafted high-density polyethylene, functional filler, composite flame retardant, processing aid and 1/5 high-density polyethylene in outer layer raw materials, heating to 120-130 ℃, stirring and mixing for 25-30min, then adding the rest high-density polyethylene, continuously mixing for 40-50min at 120-130 ℃, and cooling to below 50 ℃ for later use;
thirdly, taking the raw materials of the inner layer, heating to 105-120 ℃, stirring and mixing for 40-50min, and cooling to below 50 ℃ for later use;
step four, respectively heating and melting the outer layer raw material and the inner layer raw material, and then synchronously extruding and compounding the raw materials through two extruders to obtain a silicon core tube blank, wherein the temperature during extrusion is controlled to be 175-185 ℃;
and fifthly, performing vacuum shaping, cooling, traction and coiling on the silicon core pipe blank to obtain the silicon core pipe.
Example 1
A high-strength flame-retardant silicon core pipe is of a double-layer pipe structure and comprises an inner layer and an outer layer;
the outer layer is prepared from the following raw materials in parts by weight: 70 parts of high-density polyethylene, 9 parts of maleic anhydride grafted high-density polyethylene, 3 parts of functional filler, 2 parts of composite flame retardant and 2 parts of processing aid;
the inner layer is prepared from the following raw materials in parts by weight: 60 parts of high-density polyethylene, 0.8-1 part of composite flame retardant and 4 parts of polydimethylsiloxane;
the silicon core tube is prepared by the following steps:
firstly, mixing maleic anhydride grafted high-density polyethylene, functional filler, composite flame retardant, processing aid and 1/5 high-density polyethylene in outer layer raw materials, heating to 120 ℃, stirring and mixing for 25min, adding the rest high-density polyethylene, continuously mixing for 40min at 120 ℃, and cooling to below 50 ℃ for later use;
thirdly, taking each raw material of the inner layer, heating to 105 ℃, stirring and mixing for 40min, and cooling to below 50 ℃ for later use;
step four, respectively heating and melting the outer layer raw material and the inner layer raw material, and then synchronously extruding and compounding the raw materials through two extruders to obtain a silicon core pipe blank, wherein the temperature during extrusion is controlled at 175 ℃;
and fifthly, performing vacuum shaping, cooling, traction and coiling on the silicon core pipe blank to obtain the silicon core pipe.
Example 2
A high-strength flame-retardant silicon core pipe is of a double-layer pipe structure and comprises an inner layer and an outer layer;
the outer layer is prepared from the following raw materials in parts by weight: 75 parts of high-density polyethylene, 11 parts of maleic anhydride grafted high-density polyethylene, 3.5 parts of functional filler, 2.5 parts of composite flame retardant and 2.5 parts of processing aid;
the inner layer is prepared from the following raw materials in parts by weight: 65 parts of high-density polyethylene, 0.9 part of composite flame retardant and 4.5 parts of polydimethylsiloxane;
the silicon core tube is prepared by the following steps:
firstly, mixing maleic anhydride grafted high-density polyethylene, functional filler, composite flame retardant, processing aid and 1/5 high-density polyethylene in outer layer raw materials, heating to 125 ℃, stirring and mixing for 28min, then adding the rest high-density polyethylene, continuously mixing for 45min at 125 ℃, and cooling to below 50 ℃ for later use;
thirdly, taking each raw material of the inner layer, heating to 112 ℃, stirring and mixing for 45min, and cooling to below 50 ℃ for later use;
step four, respectively heating and melting the outer layer raw material and the inner layer raw material, and then synchronously extruding and compounding the raw materials through two extruders to obtain a silicon core pipe blank, wherein the temperature during extrusion is controlled at 180 ℃;
and fifthly, performing vacuum shaping, cooling, traction and coiling on the silicon core pipe blank to obtain the silicon core pipe.
Example 3
A high-strength flame-retardant silicon core pipe is of a double-layer pipe structure and comprises an inner layer and an outer layer;
the outer layer is prepared from the following raw materials in parts by weight: 80 parts of high-density polyethylene, 13 parts of maleic anhydride grafted high-density polyethylene, 4 parts of functional filler, 3 parts of composite flame retardant and 3 parts of processing aid;
the inner layer is prepared from the following raw materials in parts by weight: 70 parts of high-density polyethylene, 1 part of composite flame retardant and 5 parts of polydimethylsiloxane;
the silicon core tube is prepared by the following steps:
firstly, mixing maleic anhydride grafted high-density polyethylene, functional filler, composite flame retardant, processing aid and 1/5 high-density polyethylene in outer layer raw materials, heating to 130 ℃, stirring and mixing for 30min, adding the rest high-density polyethylene, continuously mixing for 50min at 130 ℃, and cooling to below 50 ℃ for later use;
thirdly, taking each raw material of the inner layer, heating to 120 ℃, stirring and mixing for 50min, and cooling to below 50 ℃ for later use;
step four, respectively heating and melting the outer layer raw material and the inner layer raw material, and then synchronously extruding and compounding the raw materials through two extruders to obtain a silicon core pipe blank, wherein the temperature during extrusion is controlled at 185 ℃;
and fifthly, performing vacuum shaping, cooling, traction and coiling on the silicon core pipe blank to obtain the silicon core pipe.
Comparative example 1
The functional filler in the outer layer raw material of example 1 was changed to carbon fiber, and the rest of the raw materials and the preparation process were unchanged.
Comparative example 2
The functional filler in the outer layer raw material of example 1 was removed, and the rest of the raw materials and the preparation process were unchanged.
Comparative example 3
The flame retardant in the raw materials of example 1 was replaced by TCPP, and the rest of the raw materials and the preparation process were unchanged.
The silicon core pipes obtained in examples 1 to 3 and comparative examples 1 to 3 were subjected to the following performance tests, in which the hardness of the outer wall of the pipe was measured according to the method specified in GB/T2411, the tensile yield strength and the maximum tensile load strength of the pipe were measured according to GB/T8804.1-2003, and the flame retardancy was measured by a Limiting Oxygen Index (LOI) and a vertical burning (UL-94) using a JF-3 Limiting Oxygen Index (LOI) meter and a CZF-II vertical burning tester, respectively, and the results are shown in Table 1 below:
TABLE 1
From the above table 1, it can be seen that the hardness value of the silicon core tube prepared in the examples 1 to 3 is 55.8 to 56.5, the yield strength value is 25.6 to 25.9, and the traction load value is 5300-; the LOI value of the silicon core tube prepared in the embodiment 1-3 is 27.5-28.2, and the vertical combustion grades are all V-0 grade, which shows that the silicon core tube material prepared by the invention has good flame retardant property; compared with comparative examples 1 and 2, the modified carbon fiber is prepared into the functional filler which can be uniformly dispersed in the HDPE matrix, so that the mechanical property of the pipe is improved; compared with comparative example 3, the composite flame retardant prepared by the method is added into a pipe material, has a multi-layer flame retardant effect, and can be uniformly distributed in the pipe material, so that the flame retardant property of the silicon core pipe is improved;
the silicon chip tube is processed to phi 32/26 specification, and the silicon chip tube prepared in examples 1-3 is tested for the physicochemical properties according to JTT 496 and 2004 high density polyethylene silicon chip plastic tube for underground road communication pipelines, and the test results are as follows:
TABLE 2
As can be seen from the above table 2, the silicon core tube prepared in the embodiments 1-3 of the present invention all meet the standard of JTT 496-; in addition, according to the national communication industry YD/T841-1996 plastic pipe for underground communication pipeline, YD5043-1997 temporary regulations on acceptance of plastic pipeline engineering of long-distance communication optical cables and JT/TEM02-2000 high-density polyethylene silicon core plastic pipe issued by the department of transportation, 16 technical indexes such as the structural size, the ring stiffness, the flat test and the like are detected, and all the indexes meet the requirements; the silicon core tube prepared by the invention has good mechanical property and high flame retardant property, meets various use requirements, and is suitable for optical cable communication network systems.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (3)
1. The utility model provides a fire-retardant silicon core pipe of high strength, is double-deck tubular construction, includes inlayer and skin, its characterized in that, the skin is made by following part by weight raw materials: 70-80 parts of high-density polyethylene, 9-13 parts of maleic anhydride grafted high-density polyethylene, 3-4 parts of functional filler, 2-3 parts of composite flame retardant and 2-3 parts of processing aid;
the inner layer is prepared from the following raw materials in parts by weight: 60-70 parts of high-density polyethylene, 0.8-1 part of composite flame retardant and 4-5 parts of polydimethylsiloxane;
the functional filler is prepared by the following method:
(1) weighing carbon fibers, dispersing the carbon fibers in dilute nitric acid, stirring for 10-12h at 75 ℃, filtering and washing to be neutral, then stirring the carbon fibers washed by the dilute nitric acid in a mixed solution of concentrated sulfuric acid and concentrated nitric acid for 20-22h at 60 ℃, repeatedly diluting, standing, washing with deionized water to be neutral, and centrifugally filtering to obtain pretreated carbon fibers; the volume ratio of concentrated sulfuric acid to concentrated nitric acid in the mixed solution of concentrated sulfuric acid and concentrated nitric acid is 3: 1;
(2) weighing 1g of pretreated carbon fiber, placing the pretreated carbon fiber in 500mL of deionized water, performing water bath ultrasonic treatment for 12h, and performing probe ultrasonic treatment for 13-15 min;
(3) pouring the obtained suspension into 500mL of Tris-HCl buffer solution, then adding 0.57g of 3, 4-dihydroxyphenethylamine hydrochloride, and stirring at room temperature for 120-130 min;
(4) centrifuging the suspension at 7500rpm for 20-25min, washing the slurry with acetone, centrifuging to remove solvent, repeating washing and centrifuging steps for 4-5 times, and freeze drying the precipitate for 48h to obtain functional filler;
the composite flame retardant is prepared by the following method:
(1) adding 200-250mL of 5 mass percent NaOH solution and 30g of cellulose into a round-bottom three-mouth flask, stirring at the normal temperature at 150r/min for 26-30min, heating to 92-94 ℃, adding 24-28mL of formaldehyde solution, and stirring for reacting for 60-70 min;
(2) weighing 11.8-12.4g of p-phenylenediamine, adding the p-phenylenediamine into the mixed solution, and continuously stirring for reaction at the temperature of 92-94 ℃ for 120-130 min;
(3) adding 25-27g of TCPP and 30g of TCPP into the reaction solution0mg sodium dodecyl benzene sulfonate, stirring for 30min, then adding 22.6-22.9g aluminum nitrate into the mixed solution, stirring, reacting for 30min, and then dropwise adding 7.7-7.8g of H3PO4Continuing to react for 30 min;
(4) and standing the product at room temperature for 12h, filtering, washing, drying at 80 ℃ to constant volume, grinding, and sieving with a 200-mesh sieve to obtain the composite flame retardant.
2. The high-strength flame-retardant silicon core tube as recited in claim 1, wherein the processing aid comprises oleamide, glyceryl monostearate and an antioxidant, and the mass ratio of the oleamide, the glyceryl monostearate and the antioxidant is 1:1: 0.5.
3. The method for preparing the high-strength flame-retardant silicon core tube according to claim 1, which is characterized by comprising the following steps:
firstly, mixing maleic anhydride grafted high-density polyethylene, functional filler, composite flame retardant, processing aid and 1/5 high-density polyethylene in outer layer raw materials, heating to 120-130 ℃, stirring and mixing for 25-30min, then adding the rest high-density polyethylene, continuously mixing for 40-50min at 120-130 ℃, and cooling to below 50 ℃ for later use;
thirdly, taking the raw materials of the inner layer, heating to 105-120 ℃, stirring and mixing for 40-50min, and cooling to below 50 ℃ for later use;
step four, respectively heating and melting the outer layer raw material and the inner layer raw material, and then synchronously extruding and compounding the raw materials through two extruders to obtain a silicon core tube blank, wherein the temperature during extrusion is controlled to be 175-185 ℃;
and fifthly, performing vacuum shaping, cooling, traction and coiling on the silicon core pipe blank to obtain the silicon core pipe.
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| CN116061502B (en) * | 2023-03-28 | 2023-06-06 | 山东寿光鲁清石化有限公司 | Material for high-density polyethylene silicon core tube |
| CN117067704B (en) * | 2023-08-18 | 2024-04-26 | 任丘市凯华通讯电力器材有限公司 | High-strength high-toughness silicon core tube and preparation method thereof |
| CN117103791B (en) * | 2023-08-28 | 2024-02-06 | 任丘市凯华通讯电力器材有限公司 | Environment-friendly high-molecular silicon core tube and preparation method thereof |
| CN117141076B (en) * | 2023-09-06 | 2024-04-19 | 任丘市凯华通讯电力器材有限公司 | High-wear-resistance silicon core pipe with inner wall and preparation method thereof |
| CN117067705B (en) * | 2023-10-16 | 2024-01-02 | 江苏诺贝尔塑业股份有限公司 | Flame-retardant silicon core tube and preparation method thereof |
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