CN114879328A - Flame-retardant optical fiber and preparation method thereof - Google Patents
Flame-retardant optical fiber and preparation method thereof Download PDFInfo
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- CN114879328A CN114879328A CN202210598165.8A CN202210598165A CN114879328A CN 114879328 A CN114879328 A CN 114879328A CN 202210598165 A CN202210598165 A CN 202210598165A CN 114879328 A CN114879328 A CN 114879328A
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 129
- 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 title claims abstract description 88
- 239000013307 optical fiber Substances 0.000 title claims abstract description 72
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000003381 stabilizer Substances 0.000 claims abstract description 25
- 239000004800 polyvinyl chloride Substances 0.000 claims abstract description 17
- 229920000915 polyvinyl chloride Polymers 0.000 claims abstract description 17
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 16
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 14
- IHTSDBYPAZEUOP-UHFFFAOYSA-N bis(2-butoxyethyl) hexanedioate Chemical compound CCCCOCCOC(=O)CCCCC(=O)OCCOCCCC IHTSDBYPAZEUOP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003822 epoxy resin Substances 0.000 claims abstract description 11
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 11
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 105
- 239000000243 solution Substances 0.000 claims description 49
- 238000003756 stirring Methods 0.000 claims description 47
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical group [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 claims description 41
- 239000000463 material Substances 0.000 claims description 40
- 239000002243 precursor Substances 0.000 claims description 31
- 239000011247 coating layer Substances 0.000 claims description 29
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 26
- 239000010410 layer Substances 0.000 claims description 26
- 238000005253 cladding Methods 0.000 claims description 25
- 238000001035 drying Methods 0.000 claims description 24
- 239000000835 fiber Substances 0.000 claims description 24
- 238000005406 washing Methods 0.000 claims description 24
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical compound OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 claims description 22
- IMQLKJBTEOYOSI-UHFFFAOYSA-N Phytic acid Natural products OP(O)(=O)OC1C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C1OP(O)(O)=O IMQLKJBTEOYOSI-UHFFFAOYSA-N 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 22
- 229940068041 phytic acid Drugs 0.000 claims description 22
- 235000002949 phytic acid Nutrition 0.000 claims description 22
- 239000000467 phytic acid Substances 0.000 claims description 22
- 239000011248 coating agent Substances 0.000 claims description 15
- 238000000576 coating method Methods 0.000 claims description 15
- 150000001875 compounds Chemical class 0.000 claims description 14
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical group [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 12
- XIOUDVJTOYVRTB-UHFFFAOYSA-N 1-(1-adamantyl)-3-aminothiourea Chemical compound C1C(C2)CC3CC2CC1(NC(=S)NN)C3 XIOUDVJTOYVRTB-UHFFFAOYSA-N 0.000 claims description 11
- LXBGSDVWAMZHDD-UHFFFAOYSA-N 2-methyl-1h-imidazole Chemical compound CC1=NC=CN1 LXBGSDVWAMZHDD-UHFFFAOYSA-N 0.000 claims description 11
- 238000009210 therapy by ultrasound Methods 0.000 claims description 11
- 238000001125 extrusion Methods 0.000 claims description 10
- 239000003607 modifier Substances 0.000 claims description 10
- IHBCFWWEZXPPLG-UHFFFAOYSA-N [Ca].[Zn] Chemical compound [Ca].[Zn] IHBCFWWEZXPPLG-UHFFFAOYSA-N 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 8
- 239000004925 Acrylic resin Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 7
- 229940067741 sodium octyl sulfate Drugs 0.000 claims description 7
- WFRKJMRGXGWHBM-UHFFFAOYSA-M sodium;octyl sulfate Chemical compound [Na+].CCCCCCCCOS([O-])(=O)=O WFRKJMRGXGWHBM-UHFFFAOYSA-M 0.000 claims description 7
- VQZYQPZGDIBNNE-UHFFFAOYSA-N CO.[Si](OCC)(OCC)(OCC)OCC Chemical compound CO.[Si](OCC)(OCC)(OCC)OCC VQZYQPZGDIBNNE-UHFFFAOYSA-N 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 235000021355 Stearic acid Nutrition 0.000 claims description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 2
- 235000012424 soybean oil Nutrition 0.000 claims description 2
- 239000003549 soybean oil Substances 0.000 claims description 2
- 239000008117 stearic acid Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000011162 core material Substances 0.000 description 34
- 238000012360 testing method Methods 0.000 description 13
- 235000012239 silicon dioxide Nutrition 0.000 description 12
- 239000011159 matrix material Substances 0.000 description 11
- 238000002485 combustion reaction Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 239000012621 metal-organic framework Substances 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 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 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- 239000010453 quartz Substances 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- YLIMHFXLIKETBC-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCC[Na] YLIMHFXLIKETBC-UHFFFAOYSA-N 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000002861 polymer material Substances 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 4
- 230000003993 interaction Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000005543 nano-size silicon particle Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
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- 230000000171 quenching effect Effects 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 239000012792 core layer Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 239000003945 anionic surfactant Substances 0.000 description 2
- 239000003093 cationic surfactant Substances 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 230000009920 chelation Effects 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 239000000693 micelle Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 150000003624 transition metals Chemical class 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
- 239000002028 Biomass Substances 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 241000233805 Phoenix Species 0.000 description 1
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
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- 239000003000 extruded plastic Substances 0.000 description 1
- 238000007306 functionalization reaction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- CDAISMWEOUEBRE-UHFFFAOYSA-N inositol Chemical group OC1C(O)C(O)C(O)C(O)C1O CDAISMWEOUEBRE-UHFFFAOYSA-N 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 239000013110 organic ligand Substances 0.000 description 1
- 229920000307 polymer substrate Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/4436—Heat resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G83/00—Macromolecular compounds not provided for in groups C08G2/00 - C08G81/00
- C08G83/008—Supramolecular polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4479—Manufacturing methods of optical cables
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- 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
- C08L2201/00—Properties
- C08L2201/22—Halogen free composition
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of optical fibers, in particular to a flame-retardant optical fiber and a preparation method thereof. The sheath prepared from the raw materials such as polyvinyl chloride, epoxy resin, dibutoxy ethyl adipate, a stabilizer, a flame retardant, an antioxidant and the like has excellent flame retardant property and high mechanical property, can meet the use requirements of flame-retardant optical fibers in various environments, and has good market prospect.
Description
Technical Field
The invention relates to the technical field of optical fibers, in particular to a flame-retardant optical fiber and a preparation method thereof.
Background
The optical fiber is an optical fiber, which is a light conduction tool using the principle of total reflection in a fiber made of glass or plastic. The optical fiber is used as an efficient light transmission medium, and has the advantages of small signal crosstalk, good confidentiality, abundant material sources, no radiation, small size, light weight, strong adaptability, long service life, easy transportation and laying and the like. Therefore, optical fibers have been developed rapidly in the past decades, and not only have important applications in communication, but also play irreplaceable roles in the fields of medicine, laser, sensing and the like.
The core of the optical fiber is made of transparent material, and the periphery of the core is provided with a material with a refractive index slightly lower than that of the core as a cladding. Optical fibers are generally composed of a core, a cladding, a coating, and a jacket. The core and the cladding are the main bodies of the optical fiber and play a decisive role in the propagation of light. The core material has a high refractive index, and the cladding is a material layer closely attached to the core and has a refractive index slightly lower than that of the core material. When the light meets a certain incident condition, the light wave can be transmitted forwards along the fiber core by utilizing the total reflection principle. The coating layer and the sheath mainly play a role in protecting the optical fiber, and also play a role in isolating stray light, improving the mechanical strength of the optical fiber, preventing moisture and the like, and some optical fibers also have more complex structures so as to meet different requirements in use.
The invention patent of application No. 201811553379.3 discloses a flame-retardant sensing optical fiber, which comprises a PMMA core layer, an adhesive layer and a PVC skin layer which are integrally formed; the PVC cortex wraps the PMMA core layer, and the adhesion layer is arranged between the PMMA core layer and the PVC cortex. The fiber core and the outer skin layer of the flame-retardant sensing optical fiber are integrally formed, are not easy to separate, the skin layer is made of flame-retardant PVC materials, the flame-retardant effect is good, the finished product is soft, and the swinging service life is long. The invention also discloses a preparation method of the flame-retardant sensing optical fiber, which is used for three-layer synchronous co-extrusion and continuous production, and is time-saving, labor-saving, stable and safe. However, the sheath layer only uses PVC material for flame retardation of the optical fiber, and although PVC has certain flame retardation performance, the special environmental use requirement of the optical fiber cannot be met.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a flame-retardant optical fiber and a preparation method thereof.
In order to solve the technical problems, the invention adopts the technical scheme that:
a flame-retardant optical fiber comprises a fiber core, a cladding, a coating layer and a sheath.
The core and the cladding are made of a quartz material.
The coating layer is polyacrylic resin.
The sheath is composed of the following raw materials: polyvinyl chloride, epoxy resin, dibutoxy ethyl adipate, a stabilizer, a flame retardant and an antioxidant.
Further, the sheath is composed of the following raw materials in parts by weight: 70-85 parts of polyvinyl chloride, 20-30 parts of epoxy resin, 1.5-4 parts of dibutoxyethyl adipate, 2-6 parts of stabilizer, 3-8 parts of flame retardant and 1-3 parts of antioxidant.
The antioxidant is any one of antioxidant 1010, antioxidant 1076 or antioxidant CA.
The stabilizer is any one of epoxidized soybean oil, stearic acid and calcium zinc stabilizer.
The flame retardant is a halogen-free flame retardant.
The preparation method of the halogen-free flame retardant comprises the following steps: adding 1.5-4 parts by weight of 2-methylimidazole into 30-50 parts by weight of methanol, and carrying out ultrasonic treatment to obtain a solution a; adding 1-2 parts by weight of zinc nitrate hexahydrate into 35-50 parts by weight of methanol, and stirring and dispersing to obtain a solution b; and then adding the solution b into the solution a, stirring and reacting at the room temperature at the rotation speed of 500-1000rpm for 18-30h, centrifuging after the reaction is finished, collecting a product, washing and drying to obtain the halogen-free flame retardant.
As a novel nano particle, the metal organic framework material is a porous crystal material containing a metal unit and an organic ligand which are connected through a coordination bond, has the characteristics of larger specific surface area, adjustable structure, excellent thermal stability, special structure and holes and the like, has better compatibility with a high polymer material, and has huge potential in the aspect of fire safety.
Compared with the traditional flame retardant, the metal organic framework material is used as the flame retardant, and the net structure of the metal organic framework material can effectively reduce the flammability of the high polymer material, and has the advantage of environmental friendliness. However, there are some disadvantages, such as low flame retardant efficiency, poor compatibility between the flame retardant and the polymer material matrix, and poor dispersibility.
Further, the preparation method of the halogen-free flame retardant comprises the following steps:
s1, adding 1.5-4 parts by weight of 2-methylimidazole into 30-50 parts by weight of methanol, and carrying out ultrasonic treatment to obtain a solution a; adding 1-2 parts by weight of zinc nitrate hexahydrate into 35-50 parts by weight of methanol, and stirring and dispersing to obtain a solution b; adding the solution b into the solution a, stirring and reacting at the room temperature at the rotating speed of 500-1000rpm for 18-30h, centrifuging after the reaction is finished, collecting a product, washing and drying to obtain a precursor;
s2, dispersing 1-3 parts by weight of the precursor obtained from S1 in 20-30 parts by weight of methanol, adding 10-30 parts by weight of 0.5-2 wt% phytic acid aqueous solution, stirring at the room temperature at the rotation speed of 500-1000rpm for 15-40min, centrifuging after finishing, collecting the product, washing and drying to obtain the halogen-free flame retardant.
Compared with a single metal organic framework material with a net structure, the composite material based on the metal organic framework material has better flame retardant effect in the aspects of reducing the heat release rate of the base material, inhibiting smoke release and the like. The phytic acid is the main storage form of plant seed phosphorus, accounts for 6% of the dry weight of grains and oilseeds, contains six phosphate groups in the structure, and has strong electronegativity and chelating capacity. The phytic acid has a special molecular structure, so that the phytic acid has excellent biocompatibility with materials, when the phytic acid is used as a component of an intumescent flame retardant, the phytic acid can be used as an acid source, and an inositol ring can be used as a carbon source, so that the phytic acid becomes a potential green biomass flame retardant. The phosphate group in the phytic acid can generate chelation reaction with metal cations to generate a stable phytic acid complex which is not easy to hydrolyze, and the excellent synergistic flame retardant effect is displayed.
Further, the preparation method of the halogen-free flame retardant comprises the following steps:
s1, adding 1.5-4 parts by weight of 2-methylimidazole into 30-50 parts by weight of methanol, and carrying out ultrasonic treatment to obtain a solution a; adding 1-2 parts by weight of zinc nitrate hexahydrate into 35-50 parts by weight of methanol, and stirring and dispersing to obtain a solution b; adding the solution b into the solution a, stirring and reacting at the room temperature at the rotating speed of 500-1000rpm for 18-30h, centrifuging after the reaction is finished, collecting a product, washing and drying to obtain a precursor;
s2, dispersing 1-3 parts by weight of the precursor obtained in S1 in 20-30 parts by weight of methanol, adding 10-30 parts by weight of 0.5-2 wt% phytic acid aqueous solution, stirring at the room temperature at the rotation speed of 500-1000rpm for 15-40min, centrifuging after the stirring is finished, collecting a product, washing and drying to obtain a precursor compound;
s3, dispersing 0.5-2 parts by weight of the precursor compound obtained from S2 in 40-60 parts by weight of methanol, adding 1-3 parts by weight of a modifier, stirring at the room temperature at the rotation speed of 800-1500rpm for 10-30min, adjusting the pH to 8-10, adding 8-15 parts by weight of 3-5 wt% tetraethyl orthosilicate methanol solution, continuing stirring and reacting for 12-24h, centrifuging after the reaction is finished, collecting a product, washing and drying to obtain the halogen-free flame retardant.
The nano silicon dioxide is also called white carbon black, has wide raw material sources and a plurality of preparation methods, has the advantages of large specific surface area, high bearing capacity, easy functionalization and the like, and has good insulativity as an inorganic silicon flame retardant, so that the heat conduction of the material can be reduced, the thermal stability of the material can be improved, and the flame retardance and the toughness of the material can be enhanced. Therefore, the invention further adopts the gel-sol theory to grow the nano-silica particles on the surface original positions of the precursor compound, thereby improving the flame retardant property of the high polymer material matrix.
The modifier is cetyl trimethyl ammonium bromide and/or sodium octyl sulfate.
The modifier is a mixture of cetyl trimethyl ammonium bromide and octyl sodium sulfate, wherein the mass ratio of the cetyl trimethyl ammonium bromide to the octyl sodium sulfate is (2-5): 1.
The invention adopts the mixture of cetyl trimethyl ammonium bromide and octyl sodium sulfate as a modifier, and the cetyl trimethyl ammonium bromide is mainly possibly a cationic surfactant, so that the electrostatic effect of attraction is realized, the polar heads are close to each other to increase the area of an effective head base, and the size of the generated silicon dioxide is different and discontinuous; and the addition of the sodium octyl sulfate as an anionic surfactant can effectively improve the interaction between the micelle and the tetraethyl orthosilicate by reducing the charge density and inserting the alkyl chain of the sodium octyl sulfate into the barrier layer of the hexadecyl trimethyl ammonium bromide, thereby being beneficial to forming the nano silicon dioxide with uniform and continuous size on the surface of the precursor compound and further being beneficial to improving the flame retardant performance of the halogen-free flame retardant.
The phytic acid molecules are grafted on the surface of the metal organic framework material through a chelation reaction, and then the nano silicon dioxide is grown in situ by utilizing a gel-sol method to prepare the halogen-free flame retardant containing three elements of nitrogen, phosphorus and silicon, so that the halogen-free flame retardant can be uniformly dispersed in a high-molecular base material without obvious aggregation, and the flame retardant property of the base material can be remarkably improved through the catalytic conversion of transition metal, the barrier effect and quenching of a carbon layer and the gas-phase dilution effect.
The flame retardant mechanism of the halogen-free flame retardant is as follows: in a condensed phase, the halogen-free flame retardant serves as a heat shielding layer to protect the matrix material, and porous oxide is generated in the combustion process to promote catalytic carbonization; meanwhile, the silicon dioxide can migrate to the surface of the substrate, so that the bottom substrate can be prevented from being further corroded by heat flow in the combustion zone, combustible substances can be inhibited from being released to the combustion zone to participate in combustion reaction, and when the polymer substrate composite material is combusted; and phosphorus-containing oxide generated after decomposition of the phytic acid can promote the growth of compact carbon slag, so that the carbon slag has better effects on insulation and oxygen isolation. In a gas phase, the halogen-free flame retardant mainly plays roles of quenching and diluting, phytic acid is used as a phosphorus-containing natural compound with 28 percent of phosphorus content, PO & free radicals generated in the combustion process can capture H & and HO & free radicals, and the quenching effect is achieved; at the same time, the gas phase product of the metal organic framework material as the precursor also contains NH 3 、N 2 、NO x And the like, which are non-combustible gases, can dilute oxygen and combustible volatiles.
The invention also discloses a preparation method of the flame-retardant optical fiber, which comprises the following steps:
heating an optical fiber preform by using a drawing furnace to draw out a fiber core, sequentially coating and solidifying the cooled and solidified fiber core through a cladding layer and a coating layer, then drawing, coating and extruding a layer of jacket outside the coating layer through an extrusion molding device to form an optical fiber, rolling and detecting to obtain the flame-retardant optical fiber.
The invention has the beneficial effects that:
1. the halogen-free flame retardant prepared by the invention contains three elements of nitrogen, phosphorus and silicon, and is used as a flame retardant in a sheath of a flame-retardant optical fiber, so that the halogen-free flame retardant can be uniformly dispersed in a high-molecular base material without obvious aggregation, and the flame retardant property of the optical fiber sheath can be remarkably improved through the catalytic conversion of transition metal, the barrier action and quenching of a carbon layer and the gas-phase dilution action.
2. The prepared halogen-free flame retardant has large-specific-surface-area particles, and can be used as physical cross-linking points in a high-molecular-material matrix to protect the matrix material from being damaged by external machinery, so that the interfacial interaction between the flame retardant and the matrix is enhanced, and the mechanical performance of an optical fiber sheath is improved.
3. The invention provides a flame-retardant optical fiber and a preparation method thereof, the cost is low, the preparation method is simple, the sheath prepared from polyvinyl chloride, epoxy resin, dibutoxy ethyl adipate, a stabilizer, a flame retardant, an antioxidant and other raw materials has excellent flame-retardant performance and high mechanical performance, can meet the use requirements of the flame-retardant optical fiber in various environments, and has good market prospect.
Detailed Description
The above summary of the present invention is described in further detail below with reference to specific embodiments, but it should not be understood that the scope of the above subject matter of the present invention is limited to the following examples.
Introduction of some raw materials in this application:
polyvinyl chloride, trade name: EL-102, supplied by Korea group.
Epoxy resin, type: e-44, density: 1.2g/cm 3 Provided by chemical company, Chun-Nan-Chun.
Dibutoxyethyl adipate, CAS No.: 141-18-4.
Calcium zinc stabilizer, type: 700-1, provided by Shijiazhuang sandenpeng chemical Co., Ltd.
Antioxidant 1076, CAS No.: 2082-79-3.
Example 1
A flame-retardant optical fiber comprises a fiber core, a cladding, a coating layer and a sheath.
The core and the cladding are made of a quartz material.
The coating layer is polyacrylic resin.
The sheath is composed of the following raw materials in parts by weight: 78 parts by weight of polyvinyl chloride, 25 parts by weight of epoxy resin, 2.5 parts by weight of dibutoxyethyl adipate, 4 parts by weight of stabilizer, 6 parts by weight of flame retardant and 1.5 parts by weight of antioxidant.
The stabilizer is a calcium zinc stabilizer.
The antioxidant is an antioxidant 1076.
The flame retardant is a halogen-free flame retardant.
The preparation method of the halogen-free flame retardant comprises the following steps: dispersing 1.298g of 2-methylimidazole in 40 parts by weight of methanol, and carrying out ultrasonic treatment to obtain a solution a; dispersing zinc nitrate hexahydrate in 40 parts by weight of methanol, and stirring and dispersing to obtain a solution b; and then adding the solution b into the solution a, stirring and reacting at room temperature at the rotating speed of 800rpm for 24 hours, centrifuging after the reaction is finished, collecting a product, washing and drying to obtain the halogen-free flame retardant.
A preparation method of a flame-retardant optical fiber comprises the following steps:
heating an optical fiber preform by using a drawing furnace to draw out a fiber core, sequentially coating and solidifying the cooled and solidified fiber core through a cladding layer and a coating layer, then drawing, coating and extruding a layer of jacket outside the coating layer through an extrusion molding device to form an optical fiber, rolling and detecting to obtain the flame-retardant optical fiber.
Example 2
A flame-retardant optical fiber comprises a fiber core, a cladding, a coating layer and a sheath.
The core and the cladding are made of a quartz material.
The coating layer is polyacrylic resin.
The sheath is composed of the following raw materials in parts by weight: 78 parts by weight of polyvinyl chloride, 25 parts by weight of epoxy resin, 2.5 parts by weight of dibutoxyethyl adipate, 4 parts by weight of stabilizer, 6 parts by weight of flame retardant and 1.5 parts by weight of antioxidant.
The stabilizer is a calcium zinc stabilizer.
The antioxidant is an antioxidant 1076.
The flame retardant is a halogen-free flame retardant.
The preparation method of the halogen-free flame retardant comprises the following steps:
s1, adding 2.5 parts by weight of 2-methylimidazole into 40 parts by weight of methanol, and carrying out ultrasonic treatment to obtain a solution a; adding 1.25 parts by weight of zinc nitrate hexahydrate into 40 parts by weight of methanol, and stirring and dispersing to obtain a solution b; adding the solution b into the solution a, stirring and reacting at room temperature at the rotating speed of 800rpm for 24 hours, centrifuging after the reaction is finished, collecting a product, washing and drying to obtain a precursor;
s2, dispersing 1.5 parts by weight of the precursor obtained in S1 in 25 parts by weight of methanol, adding 15 parts by weight of 1 wt% phytic acid aqueous solution, stirring at room temperature at the rotating speed of 800rpm for 30min, centrifuging after the stirring, collecting a product, washing and drying to obtain the halogen-free flame retardant.
A preparation method of a flame-retardant optical fiber comprises the following steps:
heating an optical fiber preform by using a drawing furnace to draw out a fiber core, sequentially coating and solidifying the cooled and solidified fiber core through a cladding layer and a coating layer, then drawing, coating and extruding a layer of jacket outside the coating layer through an extrusion molding device to form an optical fiber, rolling and detecting to obtain the flame-retardant optical fiber.
Example 3
A flame-retardant optical fiber comprises a fiber core, a cladding, a coating layer and a sheath.
The core and the cladding are made of a quartz material.
The coating layer is polyacrylic resin.
The sheath is composed of the following raw materials in parts by weight: 78 parts by weight of polyvinyl chloride, 25 parts by weight of epoxy resin, 2.5 parts by weight of dibutoxyethyl adipate, 4 parts by weight of stabilizer, 6 parts by weight of flame retardant and 1.5 parts by weight of antioxidant.
The stabilizer is a calcium zinc stabilizer.
The antioxidant is an antioxidant 1076.
The flame retardant is a halogen-free flame retardant.
The preparation method of the halogen-free flame retardant comprises the following steps:
s1, adding 2.5 parts by weight of 2-methylimidazole into 40 parts by weight of methanol, and carrying out ultrasonic treatment to obtain a solution a; adding 1.25 parts by weight of zinc nitrate hexahydrate into 40 parts by weight of methanol, and stirring and dispersing to obtain a solution b; adding the solution b into the solution a, stirring and reacting at room temperature at the rotating speed of 800rpm for 24 hours, centrifuging after the reaction is finished, collecting a product, washing and drying to obtain a precursor;
s2, dispersing 1.5 parts by weight of the precursor obtained in S1 in 25 parts by weight of methanol, adding 15 parts by weight of 1 wt% phytic acid aqueous solution, stirring at room temperature at the rotating speed of 800rpm for 30min, centrifuging after the stirring, collecting a product, washing and drying to obtain a precursor compound;
s3, dispersing 1 part by weight of the precursor compound obtained from S2 in 50 parts by weight of methanol, adding 1.6 parts by weight of hexadecyl trimethyl ammonium bromide, stirring at room temperature at the rotating speed of 1000rpm for 15min, adjusting the pH to 9, adding 10 parts by weight of 4 wt% tetraethyl orthosilicate methanol solution, continuing stirring and reacting for 18h, centrifuging after the reaction is finished, collecting a product, washing and drying to obtain the halogen-free flame retardant.
A preparation method of a flame-retardant optical fiber comprises the following steps:
heating an optical fiber preform by using a drawing furnace to draw out a fiber core, sequentially coating and solidifying the cooled and solidified fiber core through a cladding layer and a coating layer, then drawing, coating and extruding a layer of jacket outside the coating layer through an extrusion molding device to form an optical fiber, rolling and detecting to obtain the flame-retardant optical fiber.
Example 4
A flame-retardant optical fiber comprises a fiber core, a cladding, a coating layer and a sheath.
The core and the cladding are made of a quartz material.
The coating layer is polyacrylic resin.
The sheath is composed of the following raw materials in parts by weight: 78 parts by weight of polyvinyl chloride, 25 parts by weight of epoxy resin, 2.5 parts by weight of dibutoxyethyl adipate, 4 parts by weight of stabilizer, 6 parts by weight of flame retardant and 1.5 parts by weight of antioxidant.
The stabilizer is a calcium zinc stabilizer.
The antioxidant is an antioxidant 1076.
The flame retardant is a halogen-free flame retardant.
The preparation method of the halogen-free flame retardant comprises the following steps:
s1, adding 2.5 parts by weight of 2-methylimidazole into 40 parts by weight of methanol, and carrying out ultrasonic treatment to obtain a solution a; adding 1.25 parts by weight of zinc nitrate hexahydrate into 40 parts by weight of methanol, and stirring and dispersing to obtain a solution b; adding the solution b into the solution a, stirring and reacting at room temperature at the rotating speed of 800rpm for 24 hours, centrifuging after the reaction is finished, collecting a product, washing and drying to obtain a precursor;
s2, dispersing 1.5 parts by weight of the precursor obtained in S1 in 25 parts by weight of methanol, adding 15 parts by weight of 1 wt% phytic acid aqueous solution, stirring at room temperature at the rotating speed of 800rpm for 30min, centrifuging after the stirring, collecting a product, washing and drying to obtain a precursor compound;
s3, dispersing 1 part by weight of the precursor compound obtained in the S2 in 50 parts by weight of methanol, adding 1.6 parts by weight of sodium octyl sulfate, stirring at room temperature at the rotating speed of 1000rpm for 15min, adjusting the pH to 9, adding 10 parts by weight of 4 wt% tetraethyl orthosilicate methanol solution, continuing stirring and reacting for 18h, centrifuging after the reaction is finished, collecting a product, washing, and drying to obtain the halogen-free flame retardant.
A preparation method of a flame-retardant optical fiber comprises the following steps:
heating an optical fiber preform by using a drawing furnace to draw out a fiber core, sequentially coating and solidifying the cooled and solidified fiber core through a cladding layer and a coating layer, then drawing, coating and extruding a layer of jacket outside the coating layer through an extrusion molding device to form an optical fiber, rolling and detecting to obtain the flame-retardant optical fiber.
Example 5
A flame-retardant optical fiber comprises a fiber core, a cladding, a coating layer and a sheath.
The core and the cladding are made of a quartz material.
The coating layer is polyacrylic resin.
The sheath is composed of the following raw materials in parts by weight: 78 parts by weight of polyvinyl chloride, 25 parts by weight of epoxy resin, 2.5 parts by weight of dibutoxyethyl adipate, 4 parts by weight of stabilizer, 6 parts by weight of flame retardant and 1.5 parts by weight of antioxidant.
The stabilizer is a calcium zinc stabilizer.
The antioxidant is an antioxidant 1076.
The flame retardant is a halogen-free flame retardant.
The preparation method of the halogen-free flame retardant comprises the following steps:
s1, adding 2.5 parts by weight of 2-methylimidazole into 40 parts by weight of methanol, and carrying out ultrasonic treatment to obtain a solution a; adding 1.25 parts by weight of zinc nitrate hexahydrate into 40 parts by weight of methanol, and stirring and dispersing to obtain a solution b; adding the solution b into the solution a, stirring and reacting at room temperature at the rotating speed of 800rpm for 24 hours, centrifuging after the reaction is finished, collecting a product, washing and drying to obtain a precursor;
s2, dispersing 1.5 parts by weight of the precursor obtained in S1 in 25 parts by weight of methanol, adding 15 parts by weight of 1 wt% phytic acid aqueous solution, stirring at room temperature at the rotating speed of 800rpm for 30min, centrifuging after the stirring, collecting a product, washing and drying to obtain a precursor compound;
s3, dispersing 1 part by weight of the precursor compound obtained from S2 in 50 parts by weight of methanol, adding 1.6 parts by weight of a modifier, stirring at room temperature at a rotating speed of 1000rpm for 15min, adjusting the pH to 9, adding 10 parts by weight of a 4 wt% tetraethyl orthosilicate methanol solution, continuing stirring for reaction for 18h, centrifuging after the reaction is finished, collecting a product, washing, and drying to obtain the halogen-free flame retardant.
The modifier is a mixture of cetyl trimethyl ammonium bromide and octyl sodium sulfate, wherein the mass ratio of the cetyl trimethyl ammonium bromide to the octyl sodium sulfate is 4: 1.
A preparation method of a flame-retardant optical fiber comprises the following steps:
heating an optical fiber preform by using a drawing furnace to draw out a fiber core, sequentially coating and solidifying the cooled and solidified fiber core through a cladding layer and a coating layer, then drawing, coating and extruding a layer of jacket outside the coating layer through an extrusion molding device to form an optical fiber, rolling and detecting to obtain the flame-retardant optical fiber.
Test example 1
And (3) evaluating the flame retardant property: all the raw materials of the sheath in the embodiment are mixed, then sent into a double-screw extruder for extrusion and granulation, and then injection molding is carried out by an injection molding machine.
Limiting Oxygen Index (LOI) refers to the minimum oxygen volume concentration required for a substance to ignite, support a specimen to burn stably, or to burn to one-half of the material, in a mixed atmosphere of nitrogen and oxygen. The higher the minimum oxygen concentration required during combustion of the material, i.e. the higher the LOI, the better the flame retardant properties of the material. Reference is made to the national standard GB/T2406.2-2009 part 2 of determination of combustion behaviour by oxygen index method for plastics: room temperature test (RT test). Sample size: the length is 80mm, the width is 10mm, the thickness is 10mm, and the test is carried out by adopting a JF-3 type oxygen index tester of Nanjing Jiangning analytical instrument company.
Vertical burning (UL-94) test: reference is made to GB/T2408 + 2008 'horizontal method and vertical method for measuring plastic combustion performance', wherein a test method B: vertical combustion (V). Sample size: the length is 125mm, the width is 13mm, the thickness is 3mm, and a PX-03-001 vertical combustion tester of the phoenix is adopted for testing.
Each set of samples was tested in parallel five times and the test results averaged.
TABLE 1 flame retardancy test results
| LOI(％) | UL-94 rating | |
| Example 1 | 29.3 | V-1 |
| Example 2 | 35.6 | V-1 |
| Example 3 | 42.8 | V-0 |
| Example 4 | 42.5 | V-0 |
| Example 5 | 44.9 | V-0 |
From the above results, it can be seen that the flame retardant performance of example 2 is significantly improved compared to example 1, probably because the phytic acid in the composite material based on the phytic acid modified metal organic framework material can generate a chelating reaction with metal cations to generate a stable and non-hydrolyzable phytic acid complex, which exhibits better flame retardant effects in reducing the heat release rate of the matrix material and inhibiting smoke release, etc., compared to the single metal organic framework material having a network structure. Compared with the embodiment 2, the flame retardant performance of the embodiment 3 is further improved, probably because the invention further adopts the gel-sol theory, the nano silica particles are located on the surface original position of the precursor compound, and the nano silica has good insulativity as the inorganic silicon flame retardant, can reduce the heat conduction of the material, improve the thermal stability of the material, and enhance the flame retardance and the toughness of the material, thereby improving the flame retardant performance of the matrix material. The flame retardant performance of the material adopting the composite modifier in example 5 is better than that of the material adopting a single modifier in example 3 or 4, the material mainly adopts cetyl trimethyl ammonium bromide as a cationic surfactant, attractive electrostatic effect is achieved, the polar heads are close to each other to increase the effective head base area, and the size of the generated silica is different and discontinuous; and the addition of the sodium octyl sulfate as an anionic surfactant can effectively improve the interaction between the micelle and the tetraethyl orthosilicate by reducing the charge density and inserting the alkyl chain of the sodium octyl sulfate into the barrier layer of the hexadecyl trimethyl ammonium bromide, thereby being beneficial to forming the nano silicon dioxide with uniform and continuous size on the surface of the precursor compound and further being beneficial to improving the flame retardant performance of the halogen-free flame retardant.
Test example 2
Evaluation of mechanical properties: all the raw materials of the sheath in the embodiment are mixed, then sent into a double-screw extruder for extrusion and granulation, and then injection molding is carried out by an injection molding machine.
Reference is made to the national standard GB/T1040.2-2006 "determination of tensile Properties of plastics part 2: test conditions for molded and extruded plastics, type II specimens were used. Test temperature: 25 ℃, stretching rate: 10 mm/min.
Each set of samples was tested in parallel five times and the test results averaged.
TABLE 2 mechanical Property test results
| Tensile strength, MPa | Elongation at break,% | |
| Example 1 | 46.2 | 148 |
| Example 2 | 58.5 | 203 |
| Example 5 | 75.4 | 266 |
The results show that the prepared halogen-free flame retardant has large specific surface area particles, can be used as physical crosslinking points in a high polymer material matrix to protect the matrix material from external mechanical damage, so that the interfacial interaction between the flame retardant and the matrix is enhanced, the mechanical property of an optical fiber sheath is improved, the use requirements of the flame retardant optical fiber in various environments are met, and the halogen-free flame retardant has good market prospect.
Claims (9)
1. The flame-retardant optical fiber is characterized by consisting of a fiber core, a cladding, a coating layer and a sheath; the sheath is composed of the following raw materials: polyvinyl chloride, epoxy resin, dibutoxy ethyl adipate, a stabilizer, a flame retardant and an antioxidant.
2. The flame-retardant optical fiber according to claim 1, wherein the flame retardant is a halogen-free flame retardant.
3. The flame-retardant optical fiber according to claim 2, wherein the preparation method of the halogen-free flame retardant comprises the steps of: adding 1.5-4 parts by weight of 2-methylimidazole into 30-50 parts by weight of methanol, and carrying out ultrasonic treatment to obtain a solution a; adding 1-2 parts by weight of zinc nitrate hexahydrate into 35-50 parts by weight of methanol, and stirring and dispersing to obtain a solution b; and then adding the solution b into the solution a, stirring and reacting at room temperature for 18-30h, centrifuging after the reaction is finished, collecting a product, washing and drying to obtain the halogen-free flame retardant.
4. The flame-retardant optical fiber according to claim 2, wherein the preparation method of the halogen-free flame retardant comprises the steps of:
s1, adding 1.5-4 parts by weight of 2-methylimidazole into 30-50 parts by weight of methanol, and carrying out ultrasonic treatment to obtain a solution a; adding 1-2 parts by weight of zinc nitrate hexahydrate into 35-50 parts by weight of methanol, and stirring and dispersing to obtain a solution b; adding the solution b into the solution a, stirring and reacting at room temperature for 18-30h, centrifuging after the reaction is finished, collecting a product, washing and drying to obtain a precursor;
s2, dispersing 1-3 parts by weight of the precursor obtained in the step S1 in 20-30 parts by weight of methanol, adding 10-30 parts by weight of 0.5-2 wt% phytic acid aqueous solution, stirring at room temperature for 15-40min, centrifuging after the stirring, collecting a product, washing and drying to obtain the halogen-free flame retardant.
5. The flame-retardant optical fiber according to claim 2, wherein the preparation method of the halogen-free flame retardant comprises the steps of:
s1, adding 1.5-4 parts by weight of 2-methylimidazole into 30-50 parts by weight of methanol, and carrying out ultrasonic treatment to obtain a solution a; adding 1-2 parts by weight of zinc nitrate hexahydrate into 35-50 parts by weight of methanol, and stirring and dispersing to obtain a solution b; adding the solution b into the solution a, stirring and reacting at room temperature for 18-30h, centrifuging after the reaction is finished, collecting a product, washing and drying to obtain a precursor;
s2, dispersing 1-3 parts by weight of the precursor obtained in the step S1 in 20-30 parts by weight of methanol, adding 10-30 parts by weight of 0.5-2 wt% phytic acid aqueous solution, stirring at room temperature for 15-40min, centrifuging after the stirring, collecting a product, washing and drying to obtain a precursor compound;
s3, dispersing 0.5-2 parts by weight of the precursor compound obtained from S2 in 40-60 parts by weight of methanol, adding 1-3 parts by weight of a modifier, stirring at room temperature for 10-30min, adjusting the pH to 8-10, adding 8-15 parts by weight of 3-5 wt% tetraethyl orthosilicate methanol solution, continuously stirring and reacting for 12-24h, centrifuging after the reaction is finished, collecting the product, washing and drying to obtain the halogen-free flame retardant.
6. The flame-retardant optical fiber according to claim 5, wherein the modifier is cetyltrimethylammonium bromide and/or sodium octylsulfate.
7. The flame-retardant optical fiber according to claim 1, wherein the stabilizer is any one of epoxidized soybean oil, stearic acid, and calcium zinc stabilizer.
8. The flame-retardant optical fiber according to claim 1, wherein the core and the cladding are made of a silica material; the coating layer is polyacrylic resin.
9. The method of making a flame retardant optical fiber according to any of claims 1 to 8, comprising the steps of:
heating an optical fiber preform by using a drawing furnace to draw out a fiber core, sequentially coating and solidifying the cooled and solidified fiber core through a cladding layer and a coating layer, then drawing, coating and extruding a layer of jacket outside the coating layer through an extrusion molding device to form an optical fiber, rolling and detecting to obtain the flame-retardant optical fiber.
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| CN107884891A (en) * | 2017-12-27 | 2018-04-06 | 江苏亨通光电股份有限公司 | A kind of high density resistance to compression fiber bundle optical cable for data center |
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