CN116694062A - Polyurethane composite material anti-seismic bracket for high-speed rail and preparation method and application thereof - Google Patents
Polyurethane composite material anti-seismic bracket for high-speed rail and preparation method and application thereof Download PDFInfo
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- CN116694062A CN116694062A CN202310772701.6A CN202310772701A CN116694062A CN 116694062 A CN116694062 A CN 116694062A CN 202310772701 A CN202310772701 A CN 202310772701A CN 116694062 A CN116694062 A CN 116694062A
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- 239000002131 composite material Substances 0.000 title claims abstract description 64
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 55
- 239000004814 polyurethane Substances 0.000 title claims abstract description 55
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 94
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 43
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 42
- 238000006243 chemical reaction Methods 0.000 claims abstract description 25
- -1 polybutylene adipate Polymers 0.000 claims abstract description 25
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims abstract description 8
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 28
- 238000001816 cooling Methods 0.000 claims description 21
- 238000002156 mixing Methods 0.000 claims description 21
- 239000008139 complexing agent Substances 0.000 claims description 18
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 14
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 12
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 10
- 239000004970 Chain extender Substances 0.000 claims description 9
- 239000002270 dispersing agent Substances 0.000 claims description 9
- 239000004698 Polyethylene Substances 0.000 claims description 8
- 239000011230 binding agent Substances 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 8
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 8
- 229920000573 polyethylene Polymers 0.000 claims description 8
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 7
- 239000002518 antifoaming agent Substances 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 7
- 239000008187 granular material Substances 0.000 claims description 7
- 230000003301 hydrolyzing effect Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000003960 organic solvent Substances 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 7
- 238000010992 reflux Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 238000009210 therapy by ultrasound Methods 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- RBNPOMFGQQGHHO-UHFFFAOYSA-N glyceric acid Chemical compound OCC(O)C(O)=O RBNPOMFGQQGHHO-UHFFFAOYSA-N 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 230000035939 shock Effects 0.000 claims description 3
- 229910014314 BYK190 Inorganic materials 0.000 claims description 2
- FCKYPQBAHLOOJQ-UHFFFAOYSA-N Cyclohexane-1,2-diaminetetraacetic acid Chemical compound OC(=O)CN(CC(O)=O)C1CCCCC1N(CC(O)=O)CC(O)=O FCKYPQBAHLOOJQ-UHFFFAOYSA-N 0.000 claims description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 2
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 claims description 2
- 125000002777 acetyl group Chemical class [H]C([H])([H])C(*)=O 0.000 claims description 2
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 2
- FJJWJAFSUDWTTR-UHFFFAOYSA-N n,n-dihydroxyaniline Chemical compound ON(O)C1=CC=CC=C1 FJJWJAFSUDWTTR-UHFFFAOYSA-N 0.000 claims description 2
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 claims description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 2
- 229920001451 polypropylene glycol Polymers 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- WGIWBXUNRXCYRA-UHFFFAOYSA-H trizinc;2-hydroxypropane-1,2,3-tricarboxylate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O.[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O WGIWBXUNRXCYRA-UHFFFAOYSA-H 0.000 claims description 2
- 229920002554 vinyl polymer Polymers 0.000 claims description 2
- 229940068475 zinc citrate Drugs 0.000 claims description 2
- 235000006076 zinc citrate Nutrition 0.000 claims description 2
- 239000011746 zinc citrate Substances 0.000 claims description 2
- OMSYGYSPFZQFFP-UHFFFAOYSA-J zinc pyrophosphate Chemical compound [Zn+2].[Zn+2].[O-]P([O-])(=O)OP([O-])([O-])=O OMSYGYSPFZQFFP-UHFFFAOYSA-J 0.000 claims description 2
- HSYFJDYGOJKZCL-UHFFFAOYSA-L zinc;sulfite Chemical compound [Zn+2].[O-]S([O-])=O HSYFJDYGOJKZCL-UHFFFAOYSA-L 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract description 3
- 238000002425 crystallisation Methods 0.000 abstract description 2
- 230000008025 crystallization Effects 0.000 abstract description 2
- 230000003993 interaction Effects 0.000 abstract description 2
- 230000018044 dehydration Effects 0.000 abstract 1
- 238000006297 dehydration reaction Methods 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 229920000058 polyacrylate Polymers 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 230000007123 defense Effects 0.000 description 2
- 239000013530 defoamer Substances 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
- C08L75/06—Polyurethanes from polyesters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—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 an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/14—Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/06—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
- C08L71/08—Polyethers derived from hydroxy compounds or from their metallic derivatives
- C08L71/10—Polyethers derived from hydroxy compounds or from their metallic derivatives from phenols
- C08L71/12—Polyphenylene oxides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of polyurethane and discloses a polyurethane composite material anti-seismic bracket for high-speed rails and a preparation method and application thereof. The modified nano silicon dioxide polyurethane composite material is obtained by vacuum dehydration of polybutylene adipate, pre-reaction of toluene diisocyanate, and then adding nano silicon dioxide composite material into the prepolymer, wherein hydroxyl groups on the surface of the modified nano silicon dioxide preferentially interact with soft segments in polyurethane, so that the interaction between the hard segments and the soft segments is weakened, the activity of soft segment phase molecular chains is increased, and the chain orientation performance and crystallization index are improved.
Description
Technical Field
The invention relates to the technical field of polyurethane, in particular to a polyurethane composite material anti-seismic bracket for high-speed rails and a preparation method and application thereof.
Background
The polyurethane material is a high polymer material, and is classified into soft polyurethane and hard polyurethane according to properties, wherein the soft polyurethane mainly has a thermoplastic linear structure, has better stability, chemical resistance, rebound resilience and mechanical property than PVC foaming material, and has smaller compression deformation property. The heat insulation, sound insulation, shock resistance and gas defense performance are good, and the heat insulation, sound insulation and gas defense composite material is widely applied to packaging, sound insulation and filtering materials. The hard polyurethane plastic has light weight, sound insulation, excellent heat insulation performance, chemical resistance, good electrical performance, easy processing and low water absorption. The heat-insulating material is widely applied to construction, automobile, aviation industry and heat-insulating structural materials. As reported in paper 'synthesis and application research of polyurethane-polyacrylate interpenetrating polymer network for damping of high-speed railway vehicles', an Interpenetrating Polymer Network (IPN) structure is utilized to synthesize polyurethane-polyacrylate emulsion by adopting an emulsion polymerization process, and the prepared polyurethane-polyacrylate emulsion has a wider damping interval but lower mechanical property.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides the polyurethane composite material anti-seismic bracket for the high-speed rail, and the preparation method and the application thereof, and the mechanical property of the anti-seismic bracket is improved.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions: a preparation method of a polyurethane composite material anti-seismic bracket for a high-speed rail comprises the following steps:
(1) Uniformly mixing polyethylene, maleic anhydride and dicumyl peroxide, adding into a reaction extruder for reaction, extruding and granulating. Adding 5-10g of the obtained granules into dimethylbenzene for heating reflux, washing and suction filtering with acetone, and drying the obtained graft at 60-80 ℃ for 10-12h to obtain a purified graft;
(2) Dissolving tetraethoxysilane, a silane coupling agent KH-550 and a purified graft in acetone, uniformly mixing, adding 0.1-0.3mol/L hydrochloric acid to adjust the pH to 6.5-7.5, hydrolyzing at 45-55 ℃ for 4-6 hours to obtain gel, evaporating the gel, and drying to obtain a modified nano silicon dioxide composite material;
(3) Vacuum dehydrating polybutylene adipate at 80-100 ℃ for 1-3h, cooling to 40-60 ℃ and adding toluene diisocyanate to react in advance to generate a prepolymer, adding nano silicon dioxide composite material into the prepolymer, performing ultrasonic treatment for 20-40min and vacuum defoaming for 2-4h, adding a prepared chain extender into a defoamed product, uniformly mixing, pouring into a mold coated with a release agent, feeding the mold into a pressure forming machine preheated at 100-120 ℃ in advance, pressing and forming under the action of 20-25mpa, vulcanizing a formed film in the mold for 15-20min, cooling and demolding, immediately feeding into a hot air furnace at 100-120 ℃ to be cured for 16-18h, and standing for 6-8d to obtain a modified nano silicon dioxide polyurethane composite material;
(4) Adding the weighed modified nano silicon dioxide polyurethane composite material, an organic complexing agent, an inorganic complexing agent and a part of organic solvent into a reaction kettle, heating to 60-80 ℃, continuously stirring, preserving heat, reacting for 5-8 hours, cooling, pouring the cooled matter, a binder, a dispersing agent and a defoaming agent into a mould, and forming under the pressure of 10-13mpa to obtain the modified nano silicon dioxide polyurethane composite material anti-seismic bracket.
Further, the reaction extruder in the step (1) has a host frequency of 30-45Hz and a feeding frequency of 10-20Hz.
Further, in the step (2), the mass ratio of the tetraethoxysilane to the silane coupling agent KH-550 to the purified graft is 1:0.6-0.75:0.4-0.68.
Further, the chain extender in the step (3) is 3.3 '-dichloro-4.4' -diphenylmethyl alkane diamine or ethylenediamine or N, N-dihydroxyaniline.
Further, the organic complexing agent in the step (4) is one or more of ethylenediamine tetraacetic acid, 1, 2-cyclohexanediamine tetraacetic acid and nitrilotriacetic acid.
Further, the inorganic complexing agent in the step (4) is one or more of zinc citrate, zinc pyrophosphate and zinc sulfite.
Further, in the preparation method of the polyurethane composite material anti-vibration bracket for the high-speed rail, the binder in the step (4) is polyvinyl acetal, the dispersing agent is one or more of BYK190, BYK180 or BYK110, and the defoaming agent is one or more of polyoxypropylene glycerol ether, polyoxypropylene polyoxyethylene glycerol ether and polydimethylsiloxane.
Further, the anti-seismic bracket comprises a connector 1 for installing a steel groove 2, wherein the steel groove is used for lining a 3 tightening device, a 4 polyurethane composite supporting rod and a 5 adjustable chain for adjusting the bracket, and a spiral wire 6 is used for reinforcing the bracket, a bracket ring 7 and a bracket fixing nail 8.
Further, the polyurethane composite material anti-seismic bracket is applied to high-speed rails.
(III) beneficial technical effects
The invention grafts the maleic anhydride by polyethylene to obtain purified grafts, and then couples the tetraethoxysilane to obtain the modified nano silicon dioxide composite material. The preparation method comprises the steps of carrying out prepolymer reaction on polybutylene adipate to further obtain a composite material, wherein the molecular structure of a silane coupling agent KH550 contains epoxy groups and-C-O-C-groups, the compatibility of the silane coupling agent KH550 and epoxy organosilicon is good, nano silicon dioxide modified by the silane coupling agent has good application performance, the surface of nano silicon dioxide particles is modified, the number of hydroxyl groups on the surface of the silicon dioxide particles is eliminated or reduced, the particles are changed from hydrophilic to hydrophobic, the aim of fully compatible with the polymer is achieved, the hydroxyl groups on the surface of the modified nano silicon dioxide preferentially interact with soft segments in polyurethane, the interaction between the hard segments and the soft segments is weakened, the activity of molecular chains of the soft segments is increased, and the chain orientation performance and crystallization index are improved.
Drawings
FIG. 1 is an impact strength test of an anti-seismic bracket for a modified nano-silica polyurethane composite.
FIG. 2 is a diagram of an anti-seismic bracket of the modified nano-silica polyurethane composite.
Detailed Description
Example 1
(1) Uniformly mixing polyethylene, maleic anhydride and dicumyl peroxide, adding into a reaction extruder for reaction, extruding and granulating. Adding 5g of the obtained granules into dimethylbenzene for heating reflux, washing and suction filtering the obtained grafts with acetone, and drying the grafts at 60 ℃ for 10 hours to obtain purified grafts;
(2) Dissolving tetraethoxysilane, a silane coupling agent KH-550 and a purified graft in acetone, uniformly mixing, adding 0.1mol/L hydrochloric acid to adjust the pH to 6.5, hydrolyzing at 45 ℃ for 4 hours to obtain gel, evaporating the gel, and drying to obtain a modified nano silicon dioxide composite material;
(3) Vacuum dehydrating polybutylene adipate at 80 ℃ for 1h, cooling to 40 ℃ and adding toluene diisocyanate to react in advance to generate a prepolymer, adding a nano silicon dioxide composite material into the prepolymer, performing ultrasonic treatment for 20min and vacuum defoaming for 2h, adding a pre-prepared chain extender into a defoamed product, uniformly mixing, pouring the mixture into a mold coated with a release agent, sending the mold into a pressure forming machine preheated at 100 ℃ in advance, pressing and forming under the action of 20mpa, vulcanizing a formed film in the mold for 15min, cooling and demolding, immediately sending into a hot air furnace at 100 ℃ to be cured for 16h after demolding, and standing for 6d to obtain a modified nano silicon dioxide polyurethane composite material;
(4) Adding 10 parts by weight of the weighed modified nano silicon dioxide polyurethane composite material, 8 parts by weight of an organic complexing agent, 10 parts by weight of an inorganic complexing agent and a part of an organic solvent into a reaction kettle, heating to 60 ℃, continuously stirring, preserving heat, reacting for 5 hours, cooling, then pouring the cooled matter, 5 parts by weight of a binder, 5 parts by weight of a dispersing agent and 6 parts by weight of a defoaming agent into a mold, and molding under 13mpa pressure to obtain the modified nano silicon dioxide/polyurethane composite material anti-seismic bracket.
Example 2
(1) Uniformly mixing polyethylene, maleic anhydride and dicumyl peroxide, adding into a reaction extruder for reaction, extruding and granulating. Adding 10g of the obtained granules into dimethylbenzene for heating reflux, washing and suction filtering with acetone, and drying the obtained graft at 80 ℃ for 12 hours to obtain a purified graft;
(2) Dissolving tetraethoxysilane, a silane coupling agent KH-550 and a purified graft in acetone, uniformly mixing, adding 0.3mol/L hydrochloric acid to adjust the pH to 7.5, hydrolyzing at 55 ℃ for 6 hours to obtain gel, evaporating the gel, and drying to obtain a modified nano silicon dioxide composite material;
(3) Vacuum dehydrating polybutylene adipate at 100 ℃ for 3 hours, cooling to 60 ℃ and adding toluene diisocyanate to react in advance to generate a prepolymer, adding a nano silicon dioxide composite material into the prepolymer, performing ultrasonic treatment for 40 minutes and vacuum defoaming for 4 hours, adding a pre-prepared chain extender into a defoamed product, uniformly mixing, pouring the mixture into a mold coated with a release agent, sending the mold into a pressure forming machine preheated at 120 ℃ in advance, pressing and forming under the action of 25mpa, vulcanizing a formed film in the mold for 20 minutes, cooling and demolding, immediately sending into a hot air furnace at 120 ℃ to be solidified for 18 hours after demolding, and standing for 8 days to obtain a modified nano silicon dioxide polyurethane composite material;
(4) Adding the weighed 20 parts by weight of modified nano silicon dioxide polyurethane composite material, 14 parts by weight of organic complexing agent, 12 parts by weight of inorganic complexing agent and a part of organic solvent into a reaction kettle, heating to 60-80 ℃, continuously stirring, preserving heat, reacting for 8 hours, cooling, then pouring the cooled matter, 10 parts by weight of binder, 14 parts by weight of dispersing agent and 12 parts by weight of defoamer into a mould, and molding under the pressure of 11.5mpa to obtain the modified nano silicon dioxide polyurethane composite material anti-seismic bracket.
Example 3
(1) Uniformly mixing polyethylene, maleic anhydride and dicumyl peroxide, adding into a reaction extruder for reaction, extruding and granulating. Adding 7.5g of the obtained granules into dimethylbenzene for heating reflux, washing and suction filtering with acetone, and drying the obtained graft at 70 ℃ for 11 hours to obtain a purified graft;
(2) Dissolving tetraethoxysilane, a silane coupling agent KH-550 and a purified graft in acetone, uniformly mixing, adding 0.2mol/L hydrochloric acid to adjust the pH to 7, hydrolyzing at 50 ℃ for 5 hours to obtain gel, evaporating the gel, and drying to obtain a modified nano silicon dioxide composite material;
(3) Vacuum dehydrating polybutylene adipate at 90 ℃ for 2 hours, cooling to 50 ℃ and adding toluene diisocyanate to react in advance to generate a prepolymer, adding a nano silicon dioxide composite material into the prepolymer, carrying out ultrasonic treatment for 30 minutes and vacuum defoaming for 3 hours, adding a pre-prepared chain extender into a defoamed product, uniformly mixing, pouring the mixture into a mold coated with a release agent, sending the mold into a pressure forming machine preheated at 110 ℃ in advance, pressing and forming under the action of 22.5mpa, vulcanizing a formed film in the mold for 17.5 minutes, cooling and demolding, immediately sending into a hot air furnace at 110 ℃ for curing for 17 hours after demolding, and standing for 7 days to obtain a modified nano silicon dioxide polyurethane composite material;
(4) Adding 15 parts by weight of the weighed modified nano silicon dioxide polyurethane composite material, 11 parts by weight of the organic complexing agent, 11 parts by weight of the inorganic complexing agent and a part of the organic solvent into a reaction kettle, heating to 70 ℃, continuously stirring, preserving heat, reacting for 6.5 hours, cooling, pouring the cooled matter, 7.5 parts by weight of the binder, 9.5 parts by weight of the dispersing agent and 9 parts by weight of the defoaming agent into a mold, and molding under the pressure of 10-13mpa to obtain the modified nano silicon dioxide polyurethane composite material anti-seismic bracket.
Comparative example 1
(1) Uniformly mixing polyethylene, maleic anhydride and dicumyl peroxide, adding into a reaction extruder for reaction, extruding and granulating. Adding 5g of the obtained granules into dimethylbenzene for heating reflux, washing and suction filtering the obtained grafts with acetone, and drying the grafts at 60 ℃ for 10 hours to obtain purified grafts;
(2) Dissolving tetraethoxysilane, a silane coupling agent KH-550 and a purified graft in acetone, uniformly mixing, adding 0.3mol/L hydrochloric acid to adjust the pH to 7.5, hydrolyzing at 55 ℃ for 6 hours to obtain gel, evaporating the gel, and drying to obtain a modified nano silicon dioxide composite material;
(3) Vacuum dehydrating polybutylene adipate at 90 ℃ for 2 hours, cooling to 50 ℃ and adding toluene diisocyanate to react in advance to generate a prepolymer, adding a nano silicon dioxide composite material into the prepolymer, carrying out ultrasonic treatment for 30 minutes and vacuum defoaming for 3 hours, adding a pre-prepared chain extender into a defoamed product, uniformly mixing, pouring the mixture into a mold coated with a release agent, sending the mold into a pressure forming machine preheated at 110 ℃ in advance, pressing and forming under the action of 22.5mpa, vulcanizing a formed film in the mold for 17.5 minutes, cooling and demolding, immediately sending into a hot air furnace at 110 ℃ for curing for 17 hours after demolding, and standing for 7 days to obtain a modified nano silicon dioxide polyurethane composite material;
(4) Adding 15 parts by weight of the weighed modified nano silicon dioxide polyurethane composite material, 11 parts by weight of the organic complexing agent, 11 parts by weight of the inorganic complexing agent and a part of the organic solvent into a reaction kettle, heating to 70 ℃, continuously stirring, preserving heat, reacting for 6.5 hours, cooling, pouring the cooled matter, 7.5 parts by weight of the binder, 9.5 parts by weight of the dispersing agent and 9 parts by weight of the defoaming agent into a mold, and molding under the pressure of 10-13mpa to obtain the modified nano silicon dioxide polyurethane composite material anti-seismic bracket.
Comparative example 2
(1) Uniformly mixing polyethylene, maleic anhydride and dicumyl peroxide, adding into a reaction extruder for reaction, extruding and granulating. Adding 7.5g of the obtained granules into dimethylbenzene for heating reflux, washing and suction filtering with acetone, and drying the obtained graft at 70 ℃ for 11 hours to obtain a purified graft;
(2) Dissolving tetraethoxysilane, a silane coupling agent KH-550 and a purified graft in acetone, uniformly mixing, adding 0.2mol/L hydrochloric acid to adjust the pH to 7, hydrolyzing at 50 ℃ for 5 hours to obtain gel, evaporating the gel, and drying to obtain a modified nano silicon dioxide composite material;
(3) Vacuum dehydrating polybutylene adipate at 80 ℃ for 1h, cooling to 40 ℃ and adding toluene diisocyanate to react in advance to generate a prepolymer, adding a nano silicon dioxide composite material into the prepolymer, performing ultrasonic treatment for 20min and vacuum defoaming for 2h, adding a pre-prepared chain extender into a defoamed product, uniformly mixing, pouring the mixture into a mold coated with a release agent, sending the mold into a pressure forming machine preheated at 100 ℃ in advance, pressing and forming under the action of 20mpa, vulcanizing a formed film in the mold for 15min, cooling and demolding, immediately sending into a hot air furnace at 100 ℃ to be cured for 16h after demolding, and standing for 6d to obtain a modified nano silicon dioxide polyurethane composite material;
(4) Adding the weighed 20 parts by weight of modified nano silicon dioxide polyurethane composite material, 14 parts by weight of organic complexing agent, 12 parts by weight of inorganic complexing agent and a part of organic solvent into a reaction kettle, heating to 60-80 ℃, continuously stirring, preserving heat, reacting for 8 hours, cooling, then pouring the cooled matter, 10 parts by weight of binder, 14 parts by weight of dispersing agent and 12 parts by weight of defoamer into a mould, and molding under the pressure of 11.5mpa to obtain the modified nano silicon dioxide polyurethane composite material anti-seismic bracket.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Table 1 test of tensile Strength and elongation at break of Nano silica polyurethane composite shock-resistant scaffolds
| Project | Tensile Strength (mpa) | Elongation at break (%) |
| Example 1 | 16.1 | 456.3 |
| Example 2 | 23.4 | 465.2 |
| Example 3 | 15.1 | 423.4 |
| Comparative example 1 | 16.4 | 365.7 |
| Comparative example 2 | 12.1 | 395.8 |
From the analysis of the above examples and comparative examples, the tensile strength and the elongation at break of the nano silica polyurethane composite anti-seismic bracket prepared by the invention are obviously improved, wherein example 2 has the best effect on the tensile strength and the elongation at break of the nano silica polyurethane composite anti-seismic bracket of examples 1 and 3 comparative examples 1 and 2.
Claims (9)
1. The preparation method of the polyurethane composite material anti-seismic bracket for the high-speed rail is characterized by comprising the following steps of:
(1) Uniformly mixing polyethylene, maleic anhydride and dicumyl peroxide, adding into a reaction extruder for reaction, extruding and granulating. Adding 5-10g of the obtained granules into dimethylbenzene for heating reflux, washing and suction filtering with acetone, and drying the obtained graft at 60-80 ℃ for 10-12h to obtain a purified graft;
(2) Dissolving tetraethoxysilane, a silane coupling agent KH-550 and a purified graft in acetone, uniformly mixing, adding 0.1-0.3mol/L hydrochloric acid to adjust the pH to 6.5-7.5, hydrolyzing at 45-55 ℃ for 4-6 hours to obtain gel, evaporating the gel, and drying to obtain a modified nano silicon dioxide composite material;
(3) Vacuum dehydrating polybutylene adipate at 80-100 ℃ for 1-3h, cooling to 40-60 ℃ and adding toluene diisocyanate to react in advance to generate a prepolymer, adding nano silicon dioxide composite material into the prepolymer, performing ultrasonic treatment for 20-40min and vacuum defoaming for 2-4h, adding a prepared chain extender into a defoamed product, uniformly mixing, pouring into a mold coated with a release agent, feeding the mold into a pressure forming machine preheated at 100-120 ℃ in advance, pressing and forming under the action of 20-25mpa, vulcanizing a formed film in the mold for 15-20min, cooling and demolding, immediately feeding into a hot air furnace at 100-120 ℃ to be cured for 16-18h, and standing for 6-8d to obtain a modified nano silicon dioxide polyurethane composite material;
(4) Adding the weighed modified nano silicon dioxide polyurethane composite material, an organic complexing agent, an inorganic complexing agent and a part of organic solvent into a reaction kettle, heating to 60-80 ℃, continuously stirring, preserving heat, reacting for 5-8 hours, cooling, pouring the cooled matter, a binder, a dispersing agent and a defoaming agent into a mould, and forming at 10-13mpa to obtain the modified nano silicon dioxide polyurethane composite material anti-seismic bracket.
2. The method for preparing the polyurethane composite material anti-seismic bracket for the high-speed rail according to claim 1, which is characterized by comprising the following steps: the reaction extruder in the step (1) has a host frequency of 30-45Hz and a feeding frequency of 10-20Hz.
3. The method for preparing the polyurethane composite material anti-seismic bracket for the high-speed rail according to claim 1, which is characterized by comprising the following steps: in the step (2), the mass ratio of the tetraethoxysilane to the silane coupling agent KH-550 to the purified graft is 1:0.6-0.75:0.4-0.68.
4. The method for preparing the polyurethane composite material anti-seismic bracket for the high-speed rail according to claim 1, which is characterized by comprising the following steps: the chain extender in the step (3) is 3.3 '-dichloro-4.4' -diphenylmethyl alkane diamine or ethylenediamine or N, N-dihydroxyaniline.
5. The method for preparing the polyurethane composite material anti-seismic bracket for the high-speed rail according to claim 1, which is characterized by comprising the following steps: the organic complexing agent in the step (4) is one or more of ethylenediamine tetraacetic acid, 1, 2-cyclohexanediamine tetraacetic acid and nitrilotriacetic acid.
6. The method for preparing the polyurethane composite material anti-seismic bracket for the high-speed rail according to claim 1, which is characterized by comprising the following steps: the inorganic complexing agent in the step (4) is one or more of zinc citrate, zinc pyrophosphate and zinc sulfite.
7. The method for preparing the polyurethane composite material anti-seismic bracket for the high-speed rail according to claim 1, which is characterized by comprising the following steps: the adhesive in the step (4) is polyvinyl acetal, the dispersing agent is one or more of BYK190, BYK180 or BYK110, and the defoaming agent is one or more of polyoxypropylene glycerol ether, polyoxypropylene polyoxyethylene glycerol ether and polydimethylsiloxane.
8. A polyurethane composite material anti-seismic bracket for high-speed rails is characterized in that: the anti-seismic bracket comprises a connector 1 for installing a steel groove 2, wherein the steel groove is used for lining a 3 tightening device, a 4 polyurethane composite material supporting rod and a 5 adjustable chain for adjusting the bracket, and a spiral wire 6 for reinforcing the bracket, a bracket ring 7 and a bracket fixing nail 8.
9. The use of a polyurethane composite shock-resistant bracket according to claim 1 on high-speed rail.
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| CN202310772701.6A CN116694062A (en) | 2023-06-28 | 2023-06-28 | Polyurethane composite material anti-seismic bracket for high-speed rail and preparation method and application thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105199416A (en) * | 2015-11-11 | 2015-12-30 | 东北林业大学 | Reinforced and strengthened polyolefin wood-plastic composite and preparation method thereof |
| CN105860013A (en) * | 2016-06-28 | 2016-08-17 | 朱弟 | Preparation method of polyurethane/silica nanowire composite material |
| CN112694759A (en) * | 2020-12-21 | 2021-04-23 | 上饶市泰士特科技有限公司 | Nano silicon dioxide modified low-density polyethylene composite material and preparation method thereof |
| CN214037338U (en) * | 2020-10-22 | 2021-08-24 | 顾芳 | Building antidetonation support that high strength durability is good |
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2023
- 2023-06-28 CN CN202310772701.6A patent/CN116694062A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105199416A (en) * | 2015-11-11 | 2015-12-30 | 东北林业大学 | Reinforced and strengthened polyolefin wood-plastic composite and preparation method thereof |
| CN105860013A (en) * | 2016-06-28 | 2016-08-17 | 朱弟 | Preparation method of polyurethane/silica nanowire composite material |
| CN214037338U (en) * | 2020-10-22 | 2021-08-24 | 顾芳 | Building antidetonation support that high strength durability is good |
| CN112694759A (en) * | 2020-12-21 | 2021-04-23 | 上饶市泰士特科技有限公司 | Nano silicon dioxide modified low-density polyethylene composite material and preparation method thereof |
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