CN114588617A - Light high strength sport skateboard - Google Patents
Light high strength sport skateboard Download PDFInfo
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- CN114588617A CN114588617A CN202210050793.2A CN202210050793A CN114588617A CN 114588617 A CN114588617 A CN 114588617A CN 202210050793 A CN202210050793 A CN 202210050793A CN 114588617 A CN114588617 A CN 114588617A
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- modified
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 113
- 239000000463 material Substances 0.000 claims abstract description 81
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 81
- 239000004793 Polystyrene Substances 0.000 claims abstract description 70
- 229920002223 polystyrene Polymers 0.000 claims abstract description 70
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 59
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 59
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 59
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 59
- 239000000853 adhesive Substances 0.000 claims abstract description 29
- 230000001070 adhesive effect Effects 0.000 claims abstract description 29
- 239000002994 raw material Substances 0.000 claims abstract description 10
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- 238000002360 preparation method Methods 0.000 claims description 35
- 230000003014 reinforcing effect Effects 0.000 claims description 32
- 239000011241 protective layer Substances 0.000 claims description 21
- 239000013067 intermediate product Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 11
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- 244000205124 Acer nigrum Species 0.000 claims description 10
- 235000010328 Acer nigrum Nutrition 0.000 claims description 10
- 235000010157 Acer saccharum subsp saccharum Nutrition 0.000 claims description 10
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 10
- 239000002904 solvent Substances 0.000 claims description 10
- 229920002725 thermoplastic elastomer Polymers 0.000 claims description 10
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- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 9
- 239000004814 polyurethane Substances 0.000 claims description 9
- 229920002635 polyurethane Polymers 0.000 claims description 9
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000002390 rotary evaporation Methods 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 7
- 239000004917 carbon fiber Substances 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 7
- 239000000806 elastomer Substances 0.000 claims description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 7
- BVUXDWXKPROUDO-UHFFFAOYSA-N 2,6-di-tert-butyl-4-ethylphenol Chemical compound CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 BVUXDWXKPROUDO-UHFFFAOYSA-N 0.000 claims description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 6
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 6
- JCVQKRGIASEUKR-UHFFFAOYSA-N triethoxy(phenyl)silane Chemical compound CCO[Si](OCC)(OCC)C1=CC=CC=C1 JCVQKRGIASEUKR-UHFFFAOYSA-N 0.000 claims description 6
- 239000004593 Epoxy Substances 0.000 claims description 5
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 5
- 239000004800 polyvinyl chloride Substances 0.000 claims description 5
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 5
- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 claims description 5
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 claims description 5
- GHKOFFNLGXMVNJ-UHFFFAOYSA-N Didodecyl thiobispropanoate Chemical compound CCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCC GHKOFFNLGXMVNJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000003508 Dilauryl thiodipropionate Substances 0.000 claims description 4
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 4
- 235000019304 dilauryl thiodipropionate Nutrition 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 4
- PARWUHTVGZSQPD-UHFFFAOYSA-N phenylsilane Chemical compound [SiH3]C1=CC=CC=C1 PARWUHTVGZSQPD-UHFFFAOYSA-N 0.000 claims description 4
- 239000003880 polar aprotic solvent Substances 0.000 claims description 4
- 229920005862 polyol Polymers 0.000 claims description 4
- 150000003077 polyols Chemical class 0.000 claims description 4
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 claims description 4
- QQQSFSZALRVCSZ-UHFFFAOYSA-N triethoxysilane Chemical compound CCO[SiH](OCC)OCC QQQSFSZALRVCSZ-UHFFFAOYSA-N 0.000 claims description 4
- CYSGHNMQYZDMIA-UHFFFAOYSA-N 1,3-Dimethyl-2-imidazolidinon Chemical compound CN1CCN(C)C1=O CYSGHNMQYZDMIA-UHFFFAOYSA-N 0.000 claims description 3
- PFEFOYRSMXVNEL-UHFFFAOYSA-N 2,4,6-tritert-butylphenol Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 PFEFOYRSMXVNEL-UHFFFAOYSA-N 0.000 claims description 3
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 3
- 238000006136 alcoholysis reaction Methods 0.000 claims description 3
- -1 polyethylene terephthalate Polymers 0.000 claims description 3
- 229920006345 thermoplastic polyamide Polymers 0.000 claims description 3
- ZESWBFKRPIRQCD-UHFFFAOYSA-N trimethoxy-(4-methoxyphenyl)silane Chemical compound COC1=CC=C([Si](OC)(OC)OC)C=C1 ZESWBFKRPIRQCD-UHFFFAOYSA-N 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000007822 coupling agent Substances 0.000 claims description 2
- LMQORFSQFKHATF-UHFFFAOYSA-N dimethoxy-methyl-[4-(oxiran-2-yl)butyl]silane Chemical compound CO[Si](C)(OC)CCCCC1CO1 LMQORFSQFKHATF-UHFFFAOYSA-N 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 229920006289 polycarbonate film Polymers 0.000 claims description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 2
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 2
- 239000003381 stabilizer Substances 0.000 claims description 2
- 150000005846 sugar alcohols Polymers 0.000 claims description 2
- 229920002397 thermoplastic olefin Polymers 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 230000000052 comparative effect Effects 0.000 description 37
- 239000011162 core material Substances 0.000 description 21
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 15
- 239000000203 mixture Substances 0.000 description 11
- 239000005543 nano-size silicon particle Substances 0.000 description 10
- 235000012239 silicon dioxide Nutrition 0.000 description 9
- 239000011230 binding agent Substances 0.000 description 7
- 125000003700 epoxy group Chemical group 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000002023 wood Substances 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 238000000227 grinding Methods 0.000 description 6
- 238000005498 polishing Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- YPFDHNVEDLHUCE-UHFFFAOYSA-N propane-1,3-diol Chemical compound OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 4
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
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- 230000001965 increasing effect Effects 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
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- 238000012986 modification Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004018 waxing Methods 0.000 description 3
- 239000008096 xylene Substances 0.000 description 3
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000012975 dibutyltin dilaurate Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 2
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000003586 protic polar solvent Substances 0.000 description 2
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 description 1
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 1
- 241000208140 Acer Species 0.000 description 1
- 239000004970 Chain extender Substances 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- WHGNXNCOTZPEEK-UHFFFAOYSA-N dimethoxy-methyl-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](C)(OC)CCCOCC1CO1 WHGNXNCOTZPEEK-UHFFFAOYSA-N 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000011363 dried mixture Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- PUSKHXMZPOMNTQ-UHFFFAOYSA-N ethyl 2,1,3-benzoselenadiazole-5-carboxylate Chemical group CCOC(=O)C1=CC=C2N=[Se]=NC2=C1 PUSKHXMZPOMNTQ-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
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- 230000009191 jumping Effects 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920005906 polyester polyol Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- JXUKBNICSRJFAP-UHFFFAOYSA-N triethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCOCC1CO1 JXUKBNICSRJFAP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
- A63C17/00—Roller skates; Skate-boards
- A63C17/01—Skateboards
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—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 aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/06—Polystyrene
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/06—Polyurethanes from polyesters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- 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
Abstract
The invention relates to the field of sports goods, and discloses a light high-strength sports skateboard, wherein a multi-layer board in the traditional skateboard is replaced by hyperbranched nano SiO2Modified polystyrene material, using hyperbranched nano SiO2The hyperbranched nano-silica added into the modified polystyrene material increases the strength of the polystyrene material, protects the inner core in the aspects of elasticity and impact resistance, and provides enough strength and toughness for the skateboard while reducing the weight of the skateboard. And the modified adhesive is utilized to enhance the adhesive force among layers, so that better tensile strength and waterproofness are provided for the sliding plate, and the sliding plate meets the requirements of light weight and high strength. The sports skateboard has simple and stable manufacturing process, reasonable control and unlimited raw material source.
Description
Technical Field
The invention relates to the technical field of sports goods production, in particular to a light high-strength sports skateboard.
Background
The skateboard is a road surface sliding tool and is also an apparatus for extreme sports. In the process of skateboard sports, athletes perform technical exhibition in a specific field by applying various skills, have good joyfulness, interest, irritation and appreciation, are gradually accepted and welcomed by the public, and the demand of domestic skateboards is continuously increased.
Currently, the commercially available skateboard is mainly made of wood, and particularly hard maple represented by maple in canada. The main advantages of hard maple are hard texture, very high friction resistance and abrasion resistance, but the problems with hard maple during use are two major issues: one is common diseases of wood, which has poor water resistance and weather resistance, and is easy to cause poor elasticity due to water absorption in a humid environment and break in the using process; secondly, the hard maple is heavy and cannot meet the requirement of pursuing light weight of athletes. Some prior patents disclose some methods for manufacturing sliding plates, for example, chinese patent publication No. CN110315783A discloses a manufacturing process of a carbon fiber sports sliding plate, which uses carbon fiber prepreg to wrap a foam material core material for manufacturing the sliding plate, thereby improving the processing precision, the production efficiency and the product quality, and the manufactured carbon fiber sports sliding plate effectively increases the strength without increasing the weight and the volume, so that the structure is firmer. Such products still have significant cost issues, while strength is not satisfactory. Therefore, a skateboard with light weight, high strength and certain waterproofness is needed to meet the market demand.
Disclosure of Invention
The invention provides a light high-strength sports skateboard, aiming at solving the problems that the production process of the existing sports skateboard is complicated, and the obtained skateboard is low in strength and large in weight. Adopting hyperbranched nano SiO2Modified polystyrene material as reinforcing layer and hyperbranched nano SiO2Hyperbranched nano-silica is added into the modified polystyrene material, so that the dispersibility of the nano-silica is improved, the impact toughness of the material is enhanced, and the impact toughness of the material is improvedThe strength of the sliding plate is reduced, and the weight of the sliding plate is reduced; and the layers are bonded by adopting the modified adhesive, so that the bonding strength of the sliding plate is improved while the water resistance is enhanced.
In order to achieve the purpose, the invention adopts the following technical scheme:
a light high-strength sport skateboard comprises an upper protective layer, a first reinforcing layer, an inner core, a second reinforcing layer and a bottom protective layer which are sequentially bonded by modified adhesive from top to bottom, wherein the first reinforcing layer and the second reinforcing layer are hyperbranched nano SiO2A modified polystyrene material.
In skateboard sports, the large number of pedaling, rotation, and jumping motions place high demands on the strength and weight of the skateboard. Replacing the multi-layer wood board in the traditional skateboard with hyperbranched nano SiO2Modified polystyrene material, using hyperbranched nano SiO2The hyperbranched nano-silica added into the modified polystyrene material provides enough strength and toughness while reducing the weight of the polystyrene material, protects the inner core in terms of elasticity and impact resistance, and improves the strength of the sliding plate. Meanwhile, the modified adhesive is utilized to enhance the adhesive force among layers, so that better tensile strength and waterproofness are provided for the sliding plate, and the sliding plate meets the requirements of light weight and high strength.
Preferably, the hyperbranched nano SiO2The preparation method of the modified polystyrene material comprises the following steps:
(1) hyperbranched nano SiO2Preparation: taking 2-5 parts of nano SiO by weight2Dispersing 25-50 parts of a phenyl silane coupling agent in an organic solvent, adding 3-8 parts of absolute ethyl alcohol and 3-8 parts of water, reacting at 40-50 ℃ for 6-8 hours, and removing the organic solvent to obtain an intermediate product; dissolving 10-20 parts of intermediate product and 6-14 parts of epoxy silane coupling agent in a polar aprotic solvent, adding 1-3 parts of water at the temperature of 3-5 ℃, heating to 40-50 ℃, reacting for 2-4 h, and performing rotary evaporation, washing and drying to obtain hyperbranched SiO2Nano SiO2；
(2) Hyperbranched nano SiO2Preparing a modified polystyrene material: taking the following raw materials in parts by weight: polystyrene 60E90 parts of elastomer, 10-30 parts of hyperbranched nano SiO20.5-2 parts of antioxidant and 0.5-1 part of antioxidant are uniformly mixed in an extruder, extruded and shaped at 180-210 ℃ and 1-2 MPa, and then dried at 60-70 ℃ for 6-8 hours to obtain the hyperbranched nano SiO2A modified polystyrene material.
The polystyrene material has very good compression resistance, and the polystyrene material is used as a reinforcing layer to improve the traditional skateboard, so that the performance of the skateboard can be improved in the aspects of weight and strength. In order to further improve the elasticity and toughness of the polystyrene material, a certain amount of elastomer is added to enhance the elasticity of the polystyrene material, and meanwhile, the compressive strength of the polystyrene material can be improved by adding the nano-silica. However, the nano-silica has the problem of easy aggregation and poor compatibility with polystyrene, so that the nano-silica is subjected to hyperbranched modification in the preparation process. Firstly, grafting a silane coupling agent containing benzene rings on hydroxyl groups on the surface of the nano silicon dioxide, then dissolving the nano silicon dioxide after surface grafting, unreacted silane coupling agent containing benzene rings and silane coupling agent containing epoxy groups in a nonpolar protic solvent, and forming hyperbranched nano silicon dioxide containing benzene rings and epoxy groups through a hydrolytic condensation reaction in the nonpolar protic solvent. In the reaction process, the two silane coupling agents take the grafted nano silicon dioxide as a core, and are continuously hydrolyzed, condensed and extended to finally form the hyperbranched nano silicon dioxide. Benzene rings connected with the nano silicon dioxide polymer can improve the compatibility of materials and enhance the dispersibility of the nano silicon dioxide. In addition, the epoxy group can also be used as a chain extender in the preparation process of the polystyrene material, the molecular weight and the molecular branching degree of the polystyrene can be improved, the melt viscoelasticity of a blending system is improved, more crosslinking can be generated between the epoxy group and the binder in the subsequent bonding process, and the bonding firmness is enhanced.
Preferably, the particle size of the nano silicon dioxide is 30-100 nm, and the hydroxyl content is more than 1.5 mmol/g.
Preferably, the phenyl silane coupling agent is one or more of phenyl trimethoxy silane, phenyl triethoxy silane and trimethoxy (4-methoxyphenyl) silane, the epoxy silane coupling agent is one or more of 3-glycidyl ether oxypropyl triethoxy silane, 3-glycidyl propyl (dimethoxy) methyl silane and 3- (2, 3-epoxy propoxy) propyl trimethoxy silane, and the polar aprotic solvent is one of dimethyl sulfoxide, N-dimethylformamide, N-dimethylacetamide and 1, 3-dimethyl-2-imidazolidinone.
Preferably, the elastomer is one or more of styrene thermoplastic elastomers, polyurethane thermoplastic elastomers, polyamide thermoplastic elastomers and polyolefin thermoplastic elastomers, and the antioxidant is one or more of 2, 6-di-tert-butyl-4-ethylphenol, 2,4, 6-tri-tert-butylphenol, dilauryl thiodipropionate and tris (2, 4-di-tert-butylphenyl) phosphite.
Preferably, the modified adhesive comprises a material A and a material B in a weight ratio of (0.8-1.2): 1; the material A comprises the following components in parts by weight: 40-70 parts of polyhydric alcohol, 20-50 parts of polyvinyl alcohol, 1-5 parts of stabilizer, 1-2 parts of penetrating agent and 0.1-1 part of catalyst, wherein the molecular weight of the polyvinyl alcohol is 15000-35000, and the alcoholysis degree is 86-89%;
the material B comprises the following components in parts by weight: 30-60 parts of modified polyisocyanate compound and 10-15 parts of coupling agent; the preparation method of the modified polyisocyanate compound comprises the following steps: mixing and stirring 4-8 parts by mass of aminosilane, 20-30 parts by mass of polyisocyanate compound and 20-40 parts by mass of solvent at 60-80 ℃ in a nitrogen atmosphere for reacting for 2-6 hours, and removing the solvent to obtain an intermediate product; mixing and stirring 15-25 parts by mass of polyol, 70-90 parts by mass of intermediate product and 80-100 parts by mass of solvent at 45-65 ℃ in nitrogen atmosphere for reaction for 1-3 hours, and removing the solvent to obtain the modified polyisocyanate compound.
A certain amount of polyvinyl alcohol is added on the basis of the traditional polyurethane adhesive, and a plurality of hydrogen bond crosslinks are formed among a large amount of hydroxyl groups in the polyvinyl alcohol, ether bonds in polyurethane and amino acid methyl ester, so that the tensile strength of the adhesive is improved. On the other hand, in order to overcome the problem that the hydrolysis resistance of the binder is reduced due to the addition of polyvinyl alcohol, a certain amount of aminosilane is used for modifying the binder, the organosilicon structure in the binder and the hyperbranched nano-silica are utilized to achieve a good waterproof effect, and the addition of the aminosilane can also increase active groups, so that the binder can form more crosslinks, and the strength of the sliding plate is enhanced.
Preferably, the first reinforcing layer and the second reinforcing layer are further wrapped with glass fiber prepregs or carbon fiber prepregs. The glass fiber or the carbon fiber has the performances of high specific strength, high modulus and the like, the structural strength of the sliding plate can be further enhanced under the condition of not increasing the weight and the volume, and the anti-collision performance of the sliding plate is improved.
Preferably, the upper protective layer and the bottom protective layer are one of a polyvinyl chloride film, a polycarbonate film and a polyethylene terephthalate film. The upper protective layer and the bottom protective layer can prevent rainwater from directly contacting the reinforcing layer or the inner core, and the service life of the sliding plate is prolonged.
Preferably, the inner core is a multi-layer hard maple.
Preferably, the inner core is further provided with a plurality of protection strips, and the protection strips are made of polyurethane. The polyurethane protective strip arranged on the inner core can share the torsion borne by the sliding plate, so that the impact resistance and the shear resistance of the sliding plate are enhanced, and the bonding effect between the inner core and the reinforcing layer is enhanced.
Therefore, the invention has the following beneficial effects: (1) replacing the multi-layer wood board in the traditional skateboard with hyperbranched nano modified polystyrene material by using hyperbranched nano SiO2The hyperbranched nano-silica added into the modified polystyrene material increases the strength of the polystyrene material, protects the inner core in the aspects of elasticity and impact resistance, and provides enough strength and toughness for the sliding plate while reducing the weight of the sliding plate; (2) the modified adhesive is used for enhancing the adhesive force among layers, so that better tensile strength and waterproofness are provided for the sliding plate, and the sliding plate meets the requirements of light weight and high strength; (3) the preparation process is simple and stable, the control is reasonable, and the source of the raw materials is not limited.
Detailed Description
The invention is further described with reference to specific embodiments. It is to be understood that these examples are suitable for illustrating the basic features and advantages of the invention, and the invention is not to be limited in scope by the following examples; the implementation conditions used in the examples can be further adjusted according to specific requirements, and the implementation conditions not indicated are generally the conditions used in routine experiments.
Not specifically illustrated in the following examples, all starting materials are commercially available or prepared by methods conventional in the art.
Example 1
Mono-and super branched nano SiO2Preparation of modified polystyrene Material
(1) Hyperbranched nano SiO2Preparation: taking 3 parts of nano SiO by weight2(the particle size is 60nm, the hydroxyl content is more than 1.5mmol/g), 35 parts of phenyl triethoxy silane are dispersed in xylene, 6 parts of absolute ethyl alcohol and 6 parts of water are added, the mixture reacts for 7 hours at the temperature of 45 ℃, and the organic solvent is removed to obtain an intermediate product; dissolving 15 parts of intermediate product and 10 parts of 3-glycidyl ether oxypropyltriethoxysilane in dimethyl sulfoxide, adding 2 parts of water at the temperature of 5 ℃, heating to 45 ℃, reacting for 3 hours, performing rotary evaporation, washing and drying to obtain hyperbranched nano SiO2；
(2) Hyperbranched nano SiO2Preparing a modified polystyrene material: taking the following raw materials in parts by weight: 80 parts of polystyrene, 20 parts of styrene thermoplastic elastomer and hyperbranched nano SiO2Drying 1 part of antioxidant 2, 6-di-tert-butyl-4-ethylphenol at 120 ℃ for 6h in vacuum, putting the mixture into a double-screw extruder, uniformly mixing, extruding the mixture to a head outlet, controlling the temperature of the extruder and the head to be 200 ℃ and the pressure to be 1.5MPa, extruding and shaping, and drying the mixture at 65 ℃ for 7h to obtain the hyperbranched nano SiO2A modified polystyrene material.
Preparation of modified adhesive
(1) Preparation of modified polyisocyanate compound: uniformly mixing 6 parts by weight of aminopropyltrimethoxysilane, 25 parts by weight of diphenylmethane diisocyanate and 30 parts by weight of toluene at 70 ℃ in a nitrogen atmosphere, stirring for reacting for 4 hours, and removing the solvent to obtain an intermediate product; uniformly mixing 20 parts by mass of polyester polyol, 80 parts by mass of intermediate product and 90 parts by mass of toluene at 55 ℃ in a nitrogen atmosphere, stirring for reacting for 2 hours, and removing the solvent to obtain a modified polyisocyanate compound;
(2) preparing a binder: the moisture-proof high-strength skateboard adhesive comprises a material A and a material B in a mass ratio of 1:1, wherein the material A comprises the following components in parts by weight: 60 parts of ethylene glycol and 1, 3-propylene glycol in a mass ratio of 1:2, 30 parts of polyvinyl alcohol (with the molecular weight of 25000 and the alcoholysis degree of 88%), 3 parts of nano titanium dioxide, 1 part of span and 0.5 part of dibutyltin dilaurate; the material B comprises the following components in parts by weight: 45 parts of modified polyisocyanate compound and 12 parts of vinyl triethoxysilane;
(3) preparing a binder: adding the ethylene glycol, the 1, 3-propylene glycol, the polyvinyl alcohol, the nano titanium dioxide and the span in the material A into a reaction kettle according to a proportion, starting stirring, heating to 95 ℃, adding the dibutyltin dilaurate when the moisture content of the material is less than 0.06% through vacuum dehydration, and uniformly stirring to obtain the material A; and weighing the raw materials of the material B in proportion, and uniformly stirring to obtain the material B.
Making of sports skateboard
(1) Manufacturing an inner core: processing the multilayer hard maple wood into a required outline shape in a numerical control milling machine according to requirements, processing a groove on the periphery of the shaped inner core or the upper surface close to the left and right sides, injecting polyether polyol and polyisocyanate into the groove at 25 ℃, standing for 30min, and curing and forming to obtain the inner core provided with the protective strip;
(2) forming a sliding plate: assembling the upper protective layer, the first reinforcing layer, the inner core, the second reinforcing layer and the bottom protective layer in sequence, wherein the upper protective layer and the lower protective layer are polyvinyl chloride films, the first reinforcing layer and the second reinforcing layer are hyperbranched nano modified polystyrene materials wrapped with glass fiber prepreg, coating a modified adhesive between the layers for gluing, feeding the plate blank into a mold, molding for 40min at 130 ℃ and 6MPa, and naturally cooling;
(3) grinding and polishing: and (4) grinding the surface of the semi-finished skateboard with abrasive paper, polishing and waxing after the semi-finished skateboard is smooth and has no thorns, so as to obtain the sports skateboard.
Example 2
Preparation of hyperbranched nano-modified polystyrene material
(1) Hyperbranched nano SiO2Preparation: taking 2 parts of nano SiO by weight2(the particle size is 30nm, the hydroxyl content is more than 1.5mmol/g), 25 parts of phenyltrimethoxysilane are dispersed in toluene, 3 parts of absolute ethyl alcohol and 3 parts of water are added, the reaction is carried out for 8 hours at the temperature of 40 ℃, and the organic solvent is removed to obtain an intermediate product; dissolving 20 parts of intermediate product and 14 parts of 3-glycidoxypropyl (dimethoxy) methylsilane in N, N-dimethylformamide, adding 3 parts of water at the temperature of 5 ℃, heating to 40 ℃ for reaction for 4 hours, and performing rotary evaporation, washing and drying to obtain hyperbranched nano SiO2；
(2) Hyperbranched nano SiO2Modified polystyrene material: taking the following raw materials in parts by weight: 90 parts of polystyrene, 30 parts of polyurethane thermoplastic elastomer and hyperbranched nano SiO22 parts of antioxidant dilauryl thiodipropionate and 1 part of antioxidant dilauryl thiodipropionate are dried for 4 hours under vacuum at 130 ℃, put into a double-screw extruder and uniformly mixed, extruded to a head outlet, extruded and shaped under the conditions that the temperature of the extruder and the head is controlled at 210 ℃ and the pressure of the extruder and the head is controlled at 2MPa, and dried for 8 hours at 60 ℃ to obtain hyperbranched nano SiO2A modified polystyrene material.
Preparation of modified adhesive and preparation of sports skateboard the same as in example 1.
Example 3
Preparation of hyperbranched nano-modified polystyrene material
(1) Hyperbranched nano SiO2Preparation: taking 5 parts of nano SiO by weight2Dispersing 50 parts of trimethoxy (4-methoxyphenyl) silane (the particle size is 100nm, the hydroxyl content is more than 1.5mmol/g) in toluene, adding 8 parts of absolute ethyl alcohol and 8 parts of water, reacting for 6 hours at 50 ℃, and removing the organic solvent to obtain an intermediate product; dissolving 10 parts of intermediate product and 6 parts of 3- (2, 3-epoxypropoxy) propyl trimethoxy silane in 1, 3-dimethyl-2-imidazolidinone, adding 1 part of water at the temperature of 3 ℃, heating to 50 ℃ for reaction for 2 hours, and performing rotary evaporation, washing and drying to obtain the hyperbranched nano SiO2；
(2) Hyperbranched nano SiO2Preparing a modified polystyrene material: taking the following raw materials in parts by weight: 60 parts of polystyrene, 10 parts of polyolefin thermoplastic elastomer and hyperbranched nano SiO20.5 part of antioxidant tris (2, 4-di-tert-butylphenyl) phosphite and 0.5 part of antioxidant phosphite are dried for 6 hours at 120 ℃ in vacuum, then put into a double-screw extruder to be uniformly mixed, extruded to a head outlet, extruded and shaped at the temperature of 180 ℃ and the pressure of 1MPa at the extruder and the head, and dried for 6 hours at 70 ℃ to obtain the hyperbranched nano SiO2A modified polystyrene material.
Preparation of modified adhesive and preparation of sports skateboard the same as in example 1.
Example 4
Mono-and super branched nano SiO2Preparation of modified polystyrene Material
(1) Hyperbranched nano SiO2Preparation: taking 4 parts of nano SiO by weight2(the particle size is 80nm, the hydroxyl content is more than 1.5mmol/g), 40 parts of phenyltriethoxysilane and phenyltrimethoxysilane with the mass ratio of 1:1 are dispersed in cyclohexane, 6 parts of absolute ethyl alcohol and 6 parts of water are added, the reaction is carried out for 7 hours at the temperature of 40 ℃, and the organic solvent is removed to obtain an intermediate product; dissolving 20 parts of intermediate product and 12 parts of 3- (2, 3-epoxypropoxy) propyl trimethoxy silane in N, N-dimethylacetamide, adding 1 part of water at the temperature of 5 ℃, heating to 50 ℃ for reaction for 2 hours, and performing rotary evaporation, washing and drying to obtain hyperbranched nano SiO2；
(2) Hyperbranched nano SiO2Preparing a modified polystyrene material: taking the following raw materials in parts by weight: 70 parts of polystyrene, 25 parts of polyamide thermoplastic elastomer and hyperbranched nano SiO21.5 parts of antioxidant 2,4, 6-tri-tert-butylphenol and 0.8 part of antioxidant, drying the mixture for 5 hours at 120 ℃ in vacuum, putting the dried mixture into a double-screw extruder, uniformly mixing the mixture, extruding the mixture to a head outlet, controlling the temperature of the extruder and the head to be 200 ℃ and the pressure to be 1.5MPa, extruding and shaping the mixture, and drying the mixture for 6 hours at 65 ℃ to obtain the hyperbranched nano SiO2A modified polystyrene material.
Preparation of modified adhesive
The modified adhesive was prepared in the same manner as in example 1.
Making of sports skateboard
(1) Manufacturing an inner core: processing the multilayer hard maple wood into a required contour shape in a numerical control milling machine according to requirements, processing a groove on the periphery of the shaped inner core or the upper surface close to the left side and the right side, injecting polyether polyol and polyisocyanate into the groove at 25 ℃, standing for 30min, and then curing and forming to obtain the inner core provided with the protective strip;
(2) forming a sliding plate: assembling the upper protective layer, the first reinforcing layer, the inner core, the second reinforcing layer and the bottom protective layer in sequence, wherein the upper protective layer and the lower protective layer are polyvinyl chloride films, the first reinforcing layer and the second reinforcing layer are hyperbranched nano modified polystyrene materials, coating a modified adhesive between the layers for gluing, feeding the plate blank into a mold, molding for 30min at 140 ℃ and 6MPa, and naturally cooling;
(3) grinding and polishing: and (4) grinding the surface of the semi-finished skateboard with abrasive paper, polishing and waxing after the semi-finished skateboard is smooth and has no thorns, so as to obtain the sports skateboard.
Example 5
Mono-and super branched nano SiO2Preparation of modified polystyrene Material
(1) Hyperbranched nano SiO2Preparation: taking 3 parts of nano SiO by weight2(the particle size is 50nm, the hydroxyl content is more than 1.5mmol/g), 30 parts of phenyltrimethoxysilane are dispersed in toluene, 4 parts of absolute ethyl alcohol and 4 parts of water are added, the reaction is carried out for 6 hours at the temperature of 50 ℃, and the organic solvent is removed to obtain an intermediate product; dissolving 10 parts of intermediate product and 10 parts of 3- (2, 3-epoxypropoxy) propyl trimethoxy silane and 3-glycidoxypropyl triethoxy silane in a mass ratio of 1:1 in dimethyl sulfoxide, adding 2 parts of water at the temperature of 5 ℃, heating to 40 ℃ for reaction for 4 hours, and performing rotary evaporation, washing and drying to obtain the hyperbranched nano SiO2(ii) a (2) Hyperbranched nano SiO2Preparing a modified polystyrene material: taking the following raw materials in parts by weight: 65 parts of polystyrene, 15 parts of polyolefin thermoplastic elastomer and hyperbranched nano SiO21.5 parts of antioxidant tris (2, 4-di-tert-butylphenyl) phosphite, 0.6 part of antioxidant phosphite, dried at 140 ℃ for 4 hours under vacuum, and then extruded by twin screwsUniformly mixing in an extruder, extruding to an outlet of a machine head, controlling the temperature of the extruder and the machine head to be 205 ℃ and the pressure to be 1.5MPa, extruding and shaping, and drying at 65 ℃ for 7 hours to obtain the hyperbranched nano SiO2A modified polystyrene material.
Preparation of modified adhesive
The modified adhesive was prepared in the same manner as in example 1.
Making of sports skateboard
(1) Manufacturing an inner core: processing the multilayer hard maple into a required outline shape in a numerical control milling machine according to requirements to obtain an inner core;
(2) forming a sliding plate: assembling the upper protective layer, the first reinforcing layer, the inner core, the second reinforcing layer and the bottom protective layer in sequence, wherein the upper protective layer and the lower protective layer are polyvinyl chloride films, the first reinforcing layer and the second reinforcing layer are hyperbranched nano modified polystyrene materials wrapped with carbon fiber prepreg, coating a modified adhesive between the layers for gluing, feeding the plate blank into a mold, molding for 60min at 120 ℃ and 5MPa, and naturally cooling;
(3) grinding and polishing: and (4) grinding the surface of the semi-finished skateboard with abrasive paper, polishing and waxing after the semi-finished skateboard is smooth and has no thorns, so as to obtain the sports skateboard.
Comparative example 1
The comparative example differs from the examples in that unmodified nanosilica was used in the preparation of the hyperbranched nano-modified polystyrene material.
Comparative example 2
The comparative example differs from example 1 in that the hyperbranched nano-SiO2The preparation method of the modified polystyrene material comprises the step (1) of hyperbranched nano SiO2The preparation process comprises the following steps: taking 15 parts of nano SiO by weight2(the particle size is 60nm, the hydroxyl content is more than 1.5mmol/g), 10 parts of 3-glycidyl ether oxypropyl triethoxysilane are dissolved in dimethyl sulfoxide, 2 parts of water are added at the temperature of 5 ℃, the temperature is raised to 45 ℃ for reaction for 3 hours, and the hyperbranched nano SiO is obtained after rotary evaporation, washing and drying2。
Comparative example 3
Comparative example and example1 is distinguished by hyperbranched nanosilicon dioxide2Preparation method of modified polystyrene material, step (1) hyperbranched nano SiO2The preparation process comprises the following steps: taking 3 parts of nano SiO by weight2(the particle size is 60nm, the hydroxyl content is more than 1.5mmol/g), 35 parts of phenyl triethoxy silane are dispersed in xylene, 6 parts of absolute ethyl alcohol and 6 parts of water are added, the mixture reacts for 7 hours at the temperature of 45 ℃, and the organic solvent is removed to obtain the modified nano SiO2。
Comparative example 4
The comparative example differs from example 1 in that the hyperbranched nano-SiO2Preparation method of modified polystyrene material, step (1) hyperbranched nano SiO2The preparation process comprises the following steps: taking 3 parts of nano SiO by weight2(the particle size is 60nm, the hydroxyl content is more than 1.5mmol/g), 35 parts of phenyl triethoxy silane and 10 parts of 3-glycidyl ether oxypropyl triethoxy silane are dispersed in xylene, 6 parts of absolute ethyl alcohol and 6 parts of water are added, the mixture reacts for 7 hours at the temperature of 45 ℃, and the organic solvent is removed to obtain the modified nano SiO2。
Comparative example 5
The comparative example differs from example 1 in that the hyperbranched nano-SiO2The nano silicon dioxide is not added in the preparation process of the modified polystyrene material.
Comparative example 6
The comparative example differs from example 1 in that the hyperbranched nano-SiO2The modified polystyrene material is prepared without adding elastomer.
Comparative example 7
This comparative example differs from example 1 in that the reinforcing layer is an unmodified commercially available polystyrene material.
Comparative example 8
This comparative example differs from example 1 in that the adhesive is an unmodified commercially available polyurethane-based adhesive.
Comparative example 9
This comparative example differs from example 1 in that hard maple wood of the same thickness was used in place of the first reinforcing layer and the second reinforcing layer in the manufacture of the sports skateboard.
For the sports skateboards prepared in examples 1 to 5 and comparative examples 1 to 9, the shear strength was tested according to GB/T7124-2008, the tensile strength was tested according to GB/T1040.6-2006, the bending strength was tested according to GB/T3356-2014, and the test results are shown in Table 1 below.
TABLE 1 sports skateboard Performance test
| Group of | Tensile Strength (MPa) | Flexural Strength (MPa) | Shear strength (MPa) |
| Example 1 | 365.8 | 409.1 | 76.2 |
| Example 2 | 349.5 | 417.8 | 71.3 |
| Example 3 | 301.7 | 376.5 | 69.3 |
| Example 4 | 354.2 | 357.6 | 77.6 |
| Example 5 | 317.4 | 381.3 | 62.9 |
| Comparative example 1 | 288.9 | 318.5 | 64.0 |
| Comparative example 2 | 270.3 | 343.4 | 53.5 |
| Comparative example 3 | 276.8 | 328.0 | 61.7 |
| Comparative example 4 | 264.6 | 344.5 | 58.1 |
| Comparative example 5 | 239.5 | 283.2 | 61.5 |
| Comparative example 6 | 273.5 | 303.6 | 50.9 |
| Comparative example 7 | 232.2 | 281.9 | 62.7 |
| Comparative example 8 | 275.6 | 320.8 | 45.2 |
| Comparative example 9 | 205.1 | 265.7 | 61.1 |
According to the test results of the above table, the sport skateboard prepared in the embodiments 1 to 5 adopts the hyperbranched nano-modified polystyrene material as the reinforcing layer, so that the tensile strength and the bending strength of the skateboard are improved on the basis of weight reduction, and the modified adhesive is used to ensure the good shear strength of the skateboard, so that the skateboard can meet the technical requirements of athletes in the use process, and the service life of the skateboard is prolonged.
In comparative examples 1 to 3, nano silica with different properties is used for modifying polystyrene materials, and test results show that the tensile strength and the bending strength of the sports sliding plate prepared by the conventional nano silica, the nano silica grafted with phenyl only or the nano silica modified polystyrene material grafted with epoxy only are lower than those of examples 1 to 5. The poor dispersibility of conventional nano-silica may be the reason why the modification effect is not as good as in the examples. The nano silica in comparative example 2 is grafted with only epoxy groups, and also has a problem of poor dispersibility. The phenyl-grafted nano-silica prepared in comparative example 3 loses the chain extension effect of epoxy groups after being used for modifying polystyrene materials, so that the branching degree of the polystyrene materials is reduced, and the bending strength of the nano-silica is obviously lower than that of examples 1-5. Comparative example 4 two silane coupling agents react with the nano-silica simultaneously, only the nano-silica with a silane coupling agent layer grafted on the surface can be obtained, and the condensed hyperbranched nano-silica structure cannot be formed, so that the improvement of the dispersibility of the nano-silica is limited, the number of grafted epoxy groups is obviously reduced, the modification effect is limited, and the improvement of the rigidity of the sliding plate is insufficient. Comparative example 5 no nano-silica was added to the polystyrene material, resulting in a decrease in the rigidity of the polystyrene material, and thus the strength of the produced sports skateboard was also significantly decreased.
Comparative example 6 no elastomer was added to the polystyrene material, and thus the elasticity of the polystyrene material was decreased, resulting in a significant decrease in the bending strength thereof. Comparative example 7 uses a general polystyrene material and comparative example 9 does not use a polystyrene material, and the strength of the sports skateboard prepared by the two methods is obviously reduced. Comparative example 8 the layers of the sports skateboard were bonded using a common adhesive and the shear strength of the sports skateboard was significantly reduced, indicating that the modified adhesive had better strength for bonding between the layers.
Claims (10)
1. A light high-strength sports skateboard is characterized by comprising an upper protective layer, a first reinforcing layer, an inner core, a second reinforcing layer and a bottom protective layer which are sequentially bonded by modified adhesive from top to bottom, wherein the first reinforcing layer and the second reinforcing layer are made of hyperbranched nano SiO2A modified polystyrene material.
2. The lightweight high strength sport skateboard of claim 1, wherein said hyperbranched nano-SiO2The preparation method of the modified polystyrene material comprises the following steps:
(1) hyperbranched nano SiO2Preparation: taking 2-5 parts of nano SiO by weight2Dispersing 25-50 parts of a phenyl silane coupling agent in an organic solvent, adding 3-8 parts of absolute ethyl alcohol and 3-8 parts of water, reacting at 40-50 ℃ for 6-8 hours, and removing the organic solvent to obtain an intermediate product; then dissolving 10-20 parts of intermediate product and 6-14 parts of epoxy silane coupling agent in a polar aprotic solvent, and keepingAdding 1-3 parts of water at the temperature of 3-5 ℃, heating to 40-50 ℃, reacting for 2-4 hours, and performing rotary evaporation, washing and drying to obtain the hyperbranched nano SiO2；
(2) Hyperbranched nano SiO2Preparing a modified polystyrene material: taking the following raw materials in parts by weight: 60-90 parts of polystyrene, 10-30 parts of elastomer and hyperbranched nano SiO20.5-2 parts of antioxidant and 0.5-1 part of antioxidant are uniformly mixed in an extruder, extruded and shaped at 180-210 ℃ and 1-2 MPa, and then dried at 60-70 ℃ for 6-8 hours to obtain the hyperbranched nano SiO2A modified polystyrene material.
3. The light-weight high-strength sports skateboard according to claim 2, wherein the nano-silica has a particle size of 30-100 nm and a hydroxyl content of more than 1.5 mmol/g.
4. The light weight and high strength sport skateboard of claim 2, wherein said phenyl silane coupling agent is one or more of phenyl trimethoxy silane, phenyl triethoxy silane, trimethoxy (4-methoxyphenyl) silane, said epoxy silane coupling agent is one or more of 3-glycidyl ether oxypropyl triethoxy silane, 3-glycidyl propyl (dimethoxy) methyl silane, 3- (2, 3-epoxy propoxy) propyl trimethoxy silane, and said polar aprotic solvent is one of dimethyl sulfoxide, N-dimethylformamide, N-dimethylacetamide, and 1, 3-dimethyl-2-imidazolidinone.
5. The light-weight high-strength sports skateboard according to claim 2, wherein the elastomer is one or more of styrene thermoplastic elastomers, polyurethane thermoplastic elastomers, polyamide thermoplastic elastomers and polyolefin thermoplastic elastomers, and the antioxidant is one or more of 2, 6-di-tert-butyl-4-ethylphenol, 2,4, 6-tri-tert-butylphenol, dilauryl thiodipropionate and tris (2, 4-di-tert-butylphenyl) phosphite.
6. The light-weight high-strength sports skateboard of claim 1, wherein the modified adhesive comprises a material A and a material B in a weight ratio of (0.8-1.2): 1; the material A comprises the following components in parts by weight: 40-70 parts of polyhydric alcohol, 20-50 parts of polyvinyl alcohol, 1-5 parts of stabilizer, 1-2 parts of penetrating agent and 0.1-1 part of catalyst, wherein the molecular weight of the polyvinyl alcohol is 15000-35000, and the alcoholysis degree is 86-89%;
the material B comprises the following components in parts by weight: 30-60 parts of modified polyisocyanate compound and 10-15 parts of coupling agent; the preparation method of the modified polyisocyanate compound comprises the following steps: mixing and stirring 4-8 parts by mass of aminosilane, 20-30 parts by mass of polyisocyanate compound and 20-40 parts by mass of solvent at 60-80 ℃ in a nitrogen atmosphere for reacting for 2-6 hours, and removing the solvent to obtain an intermediate product; mixing and stirring 15-25 parts by mass of polyol, 70-90 parts by mass of intermediate product and 80-100 parts by mass of solvent at 45-65 ℃ in nitrogen atmosphere for reaction for 1-3 hours, and removing the solvent to obtain the modified polyisocyanate compound.
7. The lightweight high-strength sports skateboard according to claim 1, wherein the first reinforcing layer and the second reinforcing layer are further wrapped with glass fiber prepreg or carbon fiber prepreg.
8. A lightweight high strength sports skateboard according to claim 1, wherein said upper and lower protective layers are one of a polyvinyl chloride film, a polycarbonate film, and a polyethylene terephthalate film.
9. The lightweight, high strength skateboard of claim 1 wherein said inner core is a multi-layer hard maple.
10. The lightweight, high strength skateboard of claim 9, wherein said inner core further comprises a plurality of protective strips, said protective strips being polyurethane.
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| 王兴元;罗运军;夏敏;李晓萌;高荣钊;: "超支化聚合物在树脂改性中的应用研究进展", 高分子材料科学与工程, no. 03, pages 158 - 161 * |
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| CN114588617B (en) | 2024-01-16 |
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