CN117841136A - Environment-friendly high-density fiberboard and preparation method thereof - Google Patents
Environment-friendly high-density fiberboard and preparation method thereof Download PDFInfo
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- 239000011094 fiberboard Substances 0.000 title claims abstract description 51
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000000835 fiber Substances 0.000 claims abstract description 67
- 239000000853 adhesive Substances 0.000 claims abstract description 46
- 230000001070 adhesive effect Effects 0.000 claims abstract description 46
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 24
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 12
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 12
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 12
- 238000004513 sizing Methods 0.000 claims abstract description 10
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003063 flame retardant Substances 0.000 claims abstract description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 54
- 238000003756 stirring Methods 0.000 claims description 39
- 238000006243 chemical reaction Methods 0.000 claims description 36
- 239000000243 solution Substances 0.000 claims description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- 108010073771 Soybean Proteins Proteins 0.000 claims description 30
- 235000019710 soybean protein Nutrition 0.000 claims description 29
- 238000001035 drying Methods 0.000 claims description 25
- 238000002156 mixing Methods 0.000 claims description 23
- 239000010902 straw Substances 0.000 claims description 22
- 239000008367 deionised water Substances 0.000 claims description 19
- 229910021641 deionized water Inorganic materials 0.000 claims description 19
- 238000007731 hot pressing Methods 0.000 claims description 18
- 238000002791 soaking Methods 0.000 claims description 18
- 239000011259 mixed solution Substances 0.000 claims description 16
- 238000001914 filtration Methods 0.000 claims description 15
- YAXXOCZAXKLLCV-UHFFFAOYSA-N 3-dodecyloxolane-2,5-dione Chemical compound CCCCCCCCCCCCC1CC(=O)OC1=O YAXXOCZAXKLLCV-UHFFFAOYSA-N 0.000 claims description 12
- 239000007864 aqueous solution Substances 0.000 claims description 12
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 12
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 12
- 239000002699 waste material Substances 0.000 claims description 12
- IBUZPMFMCRTGBK-UHFFFAOYSA-N ethanol ethenyl(triethoxy)silane Chemical compound C(=C)[Si](OCC)(OCC)OCC.C(C)O IBUZPMFMCRTGBK-UHFFFAOYSA-N 0.000 claims description 11
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 10
- 150000002191 fatty alcohols Chemical class 0.000 claims description 10
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 10
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 10
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 9
- YHWCPXVTRSHPNY-UHFFFAOYSA-N butan-1-olate;titanium(4+) Chemical compound [Ti+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] YHWCPXVTRSHPNY-UHFFFAOYSA-N 0.000 claims description 9
- 239000012460 protein solution Substances 0.000 claims description 9
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 240000008042 Zea mays Species 0.000 claims description 5
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 5
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 5
- 235000005822 corn Nutrition 0.000 claims description 5
- 239000004114 Ammonium polyphosphate Substances 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims description 3
- 235000007164 Oryza sativa Nutrition 0.000 claims description 3
- 240000006394 Sorghum bicolor Species 0.000 claims description 3
- 235000011684 Sorghum saccharatum Nutrition 0.000 claims description 3
- 235000021307 Triticum Nutrition 0.000 claims description 3
- REBHQKBZDKXDMN-UHFFFAOYSA-M [PH2]([O-])=O.C(C)[Al+]CC Chemical compound [PH2]([O-])=O.C(C)[Al+]CC REBHQKBZDKXDMN-UHFFFAOYSA-M 0.000 claims description 3
- 235000019826 ammonium polyphosphate Nutrition 0.000 claims description 3
- 229920001276 ammonium polyphosphate Polymers 0.000 claims description 3
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 3
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 3
- 239000000347 magnesium hydroxide Substances 0.000 claims description 3
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 235000009566 rice Nutrition 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims 2
- 244000098338 Triticum aestivum Species 0.000 claims 1
- 229940001941 soy protein Drugs 0.000 claims 1
- 239000000463 material Substances 0.000 description 7
- 241000196324 Embryophyta Species 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 239000002023 wood Substances 0.000 description 5
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 229920002522 Wood fibre Polymers 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000005034 decoration Methods 0.000 description 3
- KTLIMPGQZDZPSB-UHFFFAOYSA-M diethylphosphinate Chemical compound CCP([O-])(=O)CC KTLIMPGQZDZPSB-UHFFFAOYSA-M 0.000 description 3
- 239000002025 wood fiber Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 241000209140 Triticum Species 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 206010061619 Deformity Diseases 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 235000018102 proteins Nutrition 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention discloses a preparation method of an environment-friendly high-density fiberboard, which comprises the following steps: s1, preparing a pretreated mixed fiber; s2, preparing modified mixed fibers; s3, preparing an environment-friendly adhesive; s4, sizing treatment. According to the environment-friendly high-density fiberboard, plant fibers are specially treated, and meanwhile, the specific environment-friendly adhesive is added, and the flame retardant, the calcium carbonate and the sodium silicate are added, so that the obtained fiberboard has the advantages of good mechanical property, good dimensional stability, environment friendliness, good flame retardance, good weather resistance and the like, can meet the requirements of industries, and has a good application prospect.
Description
Technical Field
The invention belongs to the technical field of artificial boards, and particularly relates to an environment-friendly high-density fiberboard and a preparation method thereof.
Background
The fiber board is an artificial board made by interweaving wood fibers or other plant fibers and gluing, and is widely used for furniture manufacture, construction, interior decoration and the like due to good physical and mechanical properties and processability. Fiberboard is one of the main products utilized in wood processing and consumes a large amount of wood. The long-term deforestation and the disfigurement of the forest lead to the reduction of forest area, so that the supply of wood is limited. The method is a large agricultural country, has abundant crop straw resources, adopts cheap and renewable crop straw to replace wood raw materials, and is expected to be a viable option for the development of fiber boards.
In recent years, the development of medium and high density fiberboard industry in China is very rapid, and the original hard fiberboard is gradually replaced by the medium and high density fiberboard. The high-density fiberboard uses agricultural residues or secondary small firewood as main raw materials in China, and the main components of the high-density fiberboard are wood fiber, resin adhesive and the like. The environment-friendly furniture building material substitute for the log is formed after thermal grinding, drying, sizing, paving, hot pressing, post-treatment and sanding, and has the main advantages of low price compared with the log, easy processing, uniform material quality and good physical property, and can prevent water and moisture after being added with paraffin and other articles.
The high-density fiberboard has excellent physical properties, is compatible with all the advantages of the medium-density fiberboard, is widely applied to indoor and outdoor decoration, furniture, office, high-grade furniture, sound equipment and high-grade car interior decoration, and can also be used as manufacturing materials of antistatic floors, wall panels, burglary-resisting doors, wallboards, partition boards and the like of computer rooms.
At present, the adhesive for preparing the high-density fiberboard mainly adopts urea formaldehyde resin, phenolic resin and the like, and the auxiliary material is generally an insect-resist agent of a chemical synthetic material and the like. The high-density board or the further produced reinforced wood floor board made of the adhesive and auxiliary materials can release harmful substances such as formaldehyde. In addition, the fiberboard adopts wood fiber or straw fiber as a main raw material, belongs to inflammable materials, and can increase fire hazard in a large amount of indoor applications, and the natural fiber material is not good in dimensional stability and weather resistance of the fiberboard caused by untreated fiber, and in the pressing process, adhesives cannot penetrate into microstructure structures of all levels of plant fiber, so that a series of problems such as low mechanical properties of the fiberboard are caused, and the fiberboard cannot be applied to structural materials.
In the prior art, chinese patent application No. 201510414295.1 discloses a manufacturing method of a high-density fiberboard, which comprises the steps of immersing plant fibers into an adhesive to enable the adhesive to permeate between the fibers, drying and spraying adhesive again to prepare the high-density fiberboard, wherein the board adopts waterborne polyurethane as the adhesive, and the density is 0.88g/cm 3 The technology solves the problem of penetration of the adhesive, but the adhesive is high in price, and the fiber is soaked, taken out and dried, dried again for a long time, and then sprayed with the adhesive again, so that the continuous degree of the production process is poor, the production efficiency is low, and the water absorption thickness expansion rate is as high as 11.5%.
Therefore, there is a need in the art for a high density fiberboard that is environmentally friendly, has high mechanical properties, and has good weatherability.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the preparation method of the environment-friendly high-density fiberboard, which takes crushed crop straw, waste branches, miscellaneous tree with low economic value and the like as raw materials, has the advantages of good dimensional stability, high strength, environmental protection, flame retardance and good weather resistance, can meet the requirements of industry, and has better application prospect.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the preparation method of the environment-friendly high-density fiberboard comprises the following steps:
s1, preparing a pretreated mixed fiber: cleaning and drying straws, waste branches and miscellaneous tree, crushing, then adding into sodium hydroxide solution for soaking, filtering after the soaking treatment is finished, and drying to obtain pretreated mixed fiber;
s2, preparing modified mixed fibers: adding the pretreated mixed fiber obtained in the step S1 into deionized water, then adding tetrabutyl titanate and ethylenediamine, performing hydrothermal reaction, adding vinyl triethoxysilane ethanol solution after the reaction is completed, performing stirring reaction, filtering, washing and drying until the water content is not more than 5% after the reaction is completed, thus obtaining modified mixed fiber;
s3, preparing an environment-friendly adhesive: adding soybean protein into deionized water, stirring uniformly, adding NaOH solution with mass concentration of 5% to adjust pH to 10-11, and stirring at 80-90 ℃ for reacting for 20-40min to obtain soybean protein liquid; adding dodecyl succinic anhydride into an aqueous solution of fatty alcohol polyoxyethylene ether OS25, stirring uniformly to obtain a mixed solution, then uniformly mixing the mixed solution and a soybean protein solution, then adding hexamethylene diisocyanate and stannous octoate, performing constant temperature reaction, and obtaining the environment-friendly adhesive after the reaction is completed;
s4, sizing: and (3) uniformly mixing and stirring the flame retardant, the light calcium carbonate, the sodium silicate and the environment-friendly adhesive in the step (S3), adding the mixture into the modified mixed fiber in the step (S2), uniformly mixing, paving, prepressing and hot-pressing on a hot press, and forming to obtain the environment-friendly high-density fiberboard.
Preferably, the straw in the step S1 is one or more of corn straw, sorghum straw, wheat straw and rice straw; the mass concentration of the sodium hydroxide solution is 3-6%; the mass ratio of the straw to the waste branches to the miscellaneous tree is 60-70:20-30:10-20.
Preferably, the soaking temperature in the step S1 is 70-90 ℃ and the soaking time is 1-2h.
Preferably, in the step S2, the mass ratio of the pretreated mixed fiber, deionized water, tetrabutyl titanate, ethylenediamine and vinyltriethoxysilane ethanol solution is 100:700-900:20-30:30-40:80-120; the mass concentration of the vinyl triethoxysilane in the vinyl triethoxysilane ethanol solution is 5-8%.
Preferably, the temperature of the hydrothermal reaction in the step S2 is 100-120 ℃ and the time is 3-5h; the temperature of the stirring reaction is 60-80 ℃ and the time is 1-2h.
Preferably, in the step S3, the mass ratio of the soybean protein to the deionized water is 50:200-300; the mass ratio of the dodecyl succinic anhydride to the fatty alcohol polyoxyethylene ether OS25 aqueous solution is 10:100-130; the mass concentration of the fatty alcohol-polyoxyethylene ether OS25 aqueous solution is 5-10%; the mass ratio of the mixed solution to the soybean protein solution to the hexamethylene diisocyanate to the stannous octoate is 110-140:250-350:10-15:1-2.
Preferably, the temperature of the constant temperature reaction in the step S3 is 70-80 ℃ and the time is 2-4h.
Preferably, in the step S4, the mass ratio of the flame retardant, the light calcium carbonate, the sodium silicate, the environment-friendly adhesive and the modified mixed fiber is 5-10:3-5:4-8:100-120:40-60; the flame retardant is one or more of magnesium hydroxide, diethyl aluminum phosphinate and ammonium polyphosphate.
Preferably, the pre-pressing temperature in the step S4 is 30-50 ℃, the pressure is 3-5MPa, and the time is 30-50S; the hot pressing treatment is carried out at 120-140 ℃, the pressure is 4-6MPa, and the time is 1-2min.
The invention also protects the environment-friendly high-density fiberboard prepared by the method.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the preparation method of the environment-friendly high-density fiberboard, firstly, the straw, the waste branches and the miscellaneous tree are subjected to alkali treatment, so that on one hand, the originally compact structure of the plant fiber can be permeated into the plant fiber by the adhesive, the bonding strength between the fiber and the adhesive is improved, and on the other hand, the cellulose structure can be exposed, thereby increasing the number of active reaction sites and being beneficial to subsequent reactions; and then coating titanium dioxide on the surface of the mixed fiber through hydrothermal reaction, so that the ageing resistance and flame retardance of the fiber are improved, and then adding vinyl triethoxysilane, so that the hydrophobicity of the mixed fiber can be improved, simultaneously, double bonds can be introduced into the mixed fiber, and in the subsequent hot pressing process, the double bonds can react with sulfhydryl groups in soybean protein, so that the mechanical property of the fiber board is further improved.
(2) The invention provides a preparation method of an environment-friendly high-density fiberboard, and an environment-friendly adhesive is added, which takes soybean protein as a raw material, and degrades soybean protein molecules into chain shapes through alkali heat treatment to expose-OH, -COOH, -SH and-NH 2 The polar groups on the surface of the protein are increased by the equipolar groups, so that the adhesive strength is improved; then adding dodecyl succinic anhydride, adding the dodecyl succinic anhydride into an aqueous solution of fatty alcohol polyoxyethylene ether OS25 for emulsification treatment, improving the reaction degree of the dodecyl succinic anhydride, and reacting with amino groups and hydroxyl groups in soybean protein, thereby introducing long-chain oily groups, further improving the hydrophobic property of the adhesive, and adding hexamethylene diisocyanate as a cross-linking agent in the reaction process, so as to improve the bonding strength of the adhesive.
(3) According to the environment-friendly high-density fiberboard provided by the invention, the plant fibers are specially treated, and the specific environment-friendly adhesive is added, and the flame retardant, the calcium carbonate and the sodium silicate are added, so that the obtained fiberboard has the advantages of good mechanical property, good dimensional stability, environment friendliness, flame retardance, good weather resistance and the like, can meet the requirements of industries, and has a good application prospect.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The preparation method of the environment-friendly high-density fiberboard comprises the following steps:
s1, preparing a pretreated mixed fiber: cleaning 65g of corn stalks, 25g of waste branches and 10g of miscellaneous tree, drying, crushing, then adding into a sodium hydroxide solution with the mass concentration of 5% for soaking at the temperature of 80 ℃ for 1.5 hours, filtering after the soaking treatment is finished, and drying to obtain the pretreated mixed fiber;
s2, preparing modified mixed fibers: adding 100g of the pretreated mixed fiber in the step S1 into 800g of deionized water, then adding 25g of tetrabutyl titanate and 35g of ethylenediamine, carrying out hydrothermal reaction for 4 hours at 110 ℃, adding 100g of vinyl triethoxysilane ethanol solution with the mass concentration of 6% after the reaction is finished, stirring and reacting for 1.5 hours at 70 ℃, filtering and washing after the reaction is finished, and drying until the water content is not more than 5%, thus obtaining the modified mixed fiber;
s3, preparing an environment-friendly adhesive: adding 50g of soybean protein into 250g of deionized water, uniformly stirring, adding a NaOH solution with mass concentration of 5% to adjust the pH to 11, and stirring at 85 ℃ for reaction for 30min to obtain soybean protein liquid; adding 10g of dodecyl succinic anhydride into 120g of fatty alcohol polyoxyethylene ether OS25 aqueous solution with mass concentration of 8%, uniformly stirring to obtain mixed solution, uniformly mixing 130g of mixed solution and 300g of soybean protein solution, adding 13g of hexamethylene diisocyanate and 1.5g of stannous octoate, and reacting at a constant temperature of 75 ℃ for 3 hours to obtain an environment-friendly adhesive after the reaction is completed;
s4, sizing: mixing 8g of diethyl phosphinate aluminum, 4g of light calcium carbonate, 6g of sodium silicate and 110g of environment-friendly adhesive in the step S3, uniformly stirring, adding into 50g of modified mixed fibers in the step S2, uniformly mixing, paving, prepressing and hot-pressing on a hot press, wherein the pressing temperature is 40 ℃, the pressure is 4MPa, the time is 40S, the hot-pressing temperature is 130 ℃, the pressure is 5MPa, the time is 1.5min, and forming to obtain the environment-friendly high-density fiberboard.
Example 2
The preparation method of the environment-friendly high-density fiberboard comprises the following steps:
s1, preparing a pretreated mixed fiber: cleaning 65g of sorghum straw, 20g of waste branches and 15g of miscellaneous tree, drying, crushing, then adding into a sodium hydroxide solution with the mass concentration of 4% for soaking at the temperature of 80 ℃ for 2 hours, filtering after the soaking treatment is finished, and drying to obtain the pretreated mixed fiber;
s2, preparing modified mixed fibers: adding 100g of the pretreated mixed fiber in the step S1 into 800g of deionized water, then adding 25g of tetrabutyl titanate and 35g of ethylenediamine, carrying out hydrothermal reaction for 4 hours at 110 ℃, adding 100g of vinyl triethoxysilane ethanol solution with the mass concentration of 7% after the reaction is finished, stirring and reacting for 1.5 hours at 70 ℃, filtering and washing after the reaction is finished, and drying until the water content is not more than 5%, thus obtaining the modified mixed fiber;
s3, preparing an environment-friendly adhesive: adding 50g of soybean protein into 300g of deionized water, uniformly stirring, adding a NaOH solution with mass concentration of 5% to adjust the pH to 10, and stirring at 85 ℃ for reaction for 30min to obtain soybean protein liquid; adding 10g of dodecyl succinic anhydride into 110g of fatty alcohol polyoxyethylene ether OS25 aqueous solution with mass concentration of 8%, uniformly stirring to obtain mixed solution, uniformly mixing 120g of mixed solution and 350g of soybean protein solution, adding 12g of hexamethylene diisocyanate and 1.5g of stannous octoate, and reacting at a constant temperature of 75 ℃ for 3 hours to obtain an environment-friendly adhesive after the reaction is completed;
s4, sizing: and (3) uniformly mixing 7g of magnesium hydroxide, 4g of light calcium carbonate, 5g of sodium silicate and 110g of environment-friendly adhesive in the step S3, adding into 50g of modified mixed fiber in the step S2, uniformly mixing, paving, prepressing and hot-pressing on a hot press, wherein the pressing temperature is 40 ℃, the pressing pressure is 4MPa, the time is 40S, the hot-pressing temperature is 130 ℃, the pressing pressure is 5MPa, the time is 1.5min, and forming to obtain the environment-friendly high-density fiberboard.
Example 3
The preparation method of the environment-friendly high-density fiberboard comprises the following steps:
s1, preparing a pretreated mixed fiber: cleaning 60g of wheat straw, 25g of waste branches and 15g of miscellaneous tree, drying, crushing, then adding into a sodium hydroxide solution with the mass concentration of 3% for soaking at 90 ℃ for 1h, filtering after the soaking treatment is finished, and drying to obtain the pretreated mixed fiber;
s2, preparing modified mixed fibers: adding 100g of the pretreated mixed fiber in the step S1 into 700g of deionized water, then adding 20g of tetrabutyl titanate and 30g of ethylenediamine, carrying out hydrothermal reaction for 5h at 100 ℃, adding 80g of 8% vinyl triethoxysilane ethanol solution after the reaction is finished, stirring and reacting for 2h at 60 ℃, filtering and washing after the reaction is finished, and drying until the water content is not more than 5%, thus obtaining the modified mixed fiber;
s3, preparing an environment-friendly adhesive: adding 50g of soybean protein into 200g of deionized water, uniformly stirring, adding a NaOH solution with mass concentration of 5% to adjust the pH to 11, and stirring at 80 ℃ for reacting for 40min to obtain soybean protein liquid; adding 10g of dodecyl succinic anhydride into 100g of 10% mass concentration fatty alcohol polyoxyethylene ether OS25 aqueous solution, uniformly stirring to obtain mixed solution, uniformly mixing 110g of mixed solution and 250g of soybean protein solution, adding 10g of hexamethylene diisocyanate and 1g of stannous octoate, reacting at a constant temperature of 70 ℃ for 4 hours, and obtaining the environment-friendly adhesive after the reaction is completed;
s4, sizing: mixing 5g of ammonium polyphosphate, 3g of light calcium carbonate, 4g of sodium silicate and 100g of environment-friendly adhesive in the step S3, uniformly stirring, adding into 40g of modified mixed fibers in the step S2, uniformly mixing, paving, prepressing and hot-pressing on a hot press, wherein the temperature of the hot press is 30 ℃, the pressure is 3MPa, the time is 50S, the temperature of the hot-pressing is 120 ℃, the pressure is 4MPa, the time is 2min, and forming to obtain the environment-friendly high-density fiberboard.
Example 4
The preparation method of the environment-friendly high-density fiberboard comprises the following steps:
s1, preparing a pretreated mixed fiber: washing 70g of rice straw, 20g of waste branches and 10g of miscellaneous tree, drying, crushing, then adding into a sodium hydroxide solution with the mass concentration of 6% for soaking at 90 ℃ for 1h, filtering after the soaking treatment is finished, and drying to obtain the pretreated mixed fiber;
s2, preparing modified mixed fibers: adding 100g of the pretreated mixed fiber in the step S1 into 900g of deionized water, then adding 30g of tetrabutyl titanate and 40g of ethylenediamine, carrying out hydrothermal reaction for 3h at 120 ℃, adding 120g of vinyl triethoxysilane ethanol solution with the mass concentration of 5% after the reaction is finished, stirring and reacting for 1h at 80 ℃, filtering and washing after the reaction is finished, and drying until the water content is not more than 5%, thus obtaining the modified mixed fiber;
s3, preparing an environment-friendly adhesive: adding 50g of soybean protein into 300g of deionized water, uniformly stirring, adding a NaOH solution with mass concentration of 5% to adjust the pH to 10, and stirring at 90 ℃ for reacting for 20min to obtain soybean protein liquid; adding 10g of dodecyl succinic anhydride into 130g of fatty alcohol polyoxyethylene ether OS25 aqueous solution with mass concentration of 5%, uniformly stirring to obtain mixed solution, uniformly mixing 140g of mixed solution and 350g of soybean protein solution, adding 15g of hexamethylene diisocyanate and 2g of stannous octoate, reacting at the constant temperature of 80 ℃ for 2 hours, and obtaining the environment-friendly adhesive after the reaction is completed;
s4, sizing: mixing and stirring 10g of diethyl aluminum phosphinate, 5g of light calcium carbonate, 8g of sodium silicate and 120g of environment-friendly adhesive in the step S3 uniformly, adding the mixture into 60g of modified mixed fibers in the step S2, uniformly mixing, paving, prepressing and hot-pressing on a hot press, wherein the pressing temperature is 50 ℃, the pressure is 5MPa, the time is 30S, the hot-pressing temperature is 140 ℃, the pressure is 6MPa, the time is 1min, and forming to obtain the environment-friendly high-density fiberboard.
Comparative example 1
The preparation method of the environment-friendly high-density fiberboard comprises the following steps:
s1, preparing a pretreated mixed fiber: cleaning 65g of corn stalks, 25g of waste branches and 10g of miscellaneous tree, drying, crushing, then adding into a sodium hydroxide solution with the mass concentration of 5% for soaking at the temperature of 80 ℃ for 1.5 hours, filtering after the soaking treatment is finished, and drying to obtain the pretreated mixed fiber;
s2, preparing an environment-friendly adhesive: adding 50g of soybean protein into 250g of deionized water, uniformly stirring, adding a NaOH solution with mass concentration of 5% to adjust the pH to 11, and stirring at 85 ℃ for reaction for 30min to obtain soybean protein liquid; adding 10g of dodecyl succinic anhydride into 120g of fatty alcohol polyoxyethylene ether OS25 aqueous solution with mass concentration of 8%, uniformly stirring to obtain mixed solution, uniformly mixing 130g of mixed solution and 300g of soybean protein solution, adding 13g of hexamethylene diisocyanate and 1.5g of stannous octoate, and reacting at a constant temperature of 75 ℃ for 3 hours to obtain an environment-friendly adhesive after the reaction is completed;
s3, sizing: mixing 8g of diethyl phosphinate aluminum, 4g of light calcium carbonate, 6g of sodium silicate and 110g of environment-friendly adhesive in the step S2, uniformly stirring, adding into 50g of pretreatment mixed fiber in the step S1, uniformly mixing, paving, prepressing and hot-pressing on a hot press, wherein the temperature of the pressing is 40 ℃, the pressure is 4MPa, the time is 40S, the temperature of the hot-pressing is 130 ℃, the pressure is 5MPa, the time is 1.5min, and forming to obtain the environment-friendly high-density fiberboard.
Comparative example 2
The preparation method of the environment-friendly high-density fiberboard comprises the following steps:
s1, preparing a pretreated mixed fiber: cleaning 65g of corn stalks, 25g of waste branches and 10g of miscellaneous tree, drying, crushing, then adding into a sodium hydroxide solution with the mass concentration of 5% for soaking at the temperature of 80 ℃ for 1.5 hours, filtering after the soaking treatment is finished, and drying to obtain the pretreated mixed fiber;
s2, preparing modified mixed fibers: adding 100g of the pretreated mixed fiber in the step S1 into 800g of deionized water, then adding 25g of tetrabutyl titanate and 35g of ethylenediamine, carrying out hydrothermal reaction for 4 hours at 110 ℃, adding 100g of vinyl triethoxysilane ethanol solution with the mass concentration of 6% after the reaction is finished, stirring and reacting for 1.5 hours at 70 ℃, filtering and washing after the reaction is finished, and drying until the water content is not more than 5%, thus obtaining the modified mixed fiber;
s3, preparing an environment-friendly adhesive: adding 50g of soybean protein into 250g of deionized water, uniformly stirring, adding a NaOH solution with mass concentration of 5% to adjust the pH to 11, and stirring and reacting for 30min at 85 ℃ to obtain an environment-friendly adhesive;
s4, sizing: mixing 8g of diethyl phosphinate aluminum, 4g of light calcium carbonate, 6g of sodium silicate and 110g of environment-friendly adhesive in the step S3, uniformly stirring, adding into 50g of modified mixed fibers in the step S2, uniformly mixing, paving, prepressing and hot-pressing on a hot press, wherein the pressing temperature is 40 ℃, the pressure is 4MPa, the time is 40S, the hot-pressing temperature is 130 ℃, the pressure is 5MPa, the time is 1.5min, and forming to obtain the environment-friendly high-density fiberboard.
The environment-friendly high-density fiberboard prepared in the examples 1-4 and the comparative examples 1-2 is subjected to performance test, wherein the internal bonding strength and static bending strength are tested according to the standard LY/T1611-2011 'fiberboard for floor base material', the water absorption thickness expansion rate is tested according to the water absorption thickness expansion rate test-method 1 in the standard GB/T17657-2022 'method for testing the physicochemical properties of artificial boards and veneers', and the limiting oxygen index is tested according to the standard GB/T2406.2-2009; the test results are shown in Table 1 below:
TABLE 1
From the above table 1, it can be seen that the environment-friendly high-density fiberboard provided by the invention has excellent internal bonding strength and static bending strength, good water resistance and flame retardance, and good application prospect.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The preparation method of the environment-friendly high-density fiberboard is characterized by comprising the following steps of:
s1, preparing a pretreated mixed fiber: cleaning and drying straws, waste branches and miscellaneous tree, crushing, then adding into sodium hydroxide solution for soaking, filtering after the soaking treatment is finished, and drying to obtain pretreated mixed fiber;
s2, preparing modified mixed fibers: adding the pretreated mixed fiber obtained in the step S1 into deionized water, then adding tetrabutyl titanate and ethylenediamine, performing hydrothermal reaction, adding vinyl triethoxysilane ethanol solution after the reaction is completed, performing stirring reaction, filtering, washing and drying until the water content is not more than 5% after the reaction is completed, thus obtaining modified mixed fiber;
s3, preparing an environment-friendly adhesive: adding soybean protein into deionized water, stirring uniformly, adding NaOH solution with mass concentration of 5% to adjust pH to 10-11, and stirring at 80-90 ℃ for reacting for 20-40min to obtain soybean protein liquid; adding dodecyl succinic anhydride into an aqueous solution of fatty alcohol polyoxyethylene ether OS25, stirring uniformly to obtain a mixed solution, then uniformly mixing the mixed solution and a soybean protein solution, then adding hexamethylene diisocyanate and stannous octoate, performing constant temperature reaction, and obtaining the environment-friendly adhesive after the reaction is completed;
s4, sizing: and (3) uniformly mixing and stirring the flame retardant, the light calcium carbonate, the sodium silicate and the environment-friendly adhesive in the step (S3), adding the mixture into the modified mixed fiber in the step (S2), uniformly mixing, paving, prepressing and hot-pressing on a hot press, and forming to obtain the environment-friendly high-density fiberboard.
2. The preparation method according to claim 1, wherein the straw in step S1 is one or more of corn straw, sorghum straw, wheat straw, and rice straw; the mass concentration of the sodium hydroxide solution is 3-6%; the mass ratio of the straw to the waste branches to the miscellaneous tree is 60-70:20-30:10-20.
3. The method according to claim 1, wherein the dipping temperature in step S1 is 70-90 ℃ and the dipping time is 1-2 hours.
4. The preparation method according to claim 1, wherein the mass ratio of the pretreated mixed fiber, deionized water, tetrabutyl titanate, ethylenediamine and vinyltriethoxysilane ethanol solution in the step S2 is 100:700-900:20-30:30-40:80-120; the mass concentration of the vinyl triethoxysilane in the vinyl triethoxysilane ethanol solution is 5-8%.
5. The method according to claim 1, wherein the hydrothermal reaction in step S2 is performed at a temperature of 100 to 120 ℃ for a time of 3 to 5 hours; the temperature of the stirring reaction is 60-80 ℃ and the time is 1-2h.
6. The preparation method according to claim 1, wherein the mass ratio of the soy protein to the deionized water in the step S3 is 50:200-300; the mass ratio of the dodecyl succinic anhydride to the fatty alcohol polyoxyethylene ether OS25 aqueous solution is 10:100-130; the mass concentration of the fatty alcohol-polyoxyethylene ether OS25 aqueous solution is 5-10%; the mass ratio of the mixed solution to the soybean protein solution to the hexamethylene diisocyanate to the stannous octoate is 110-140:250-350:10-15:1-2.
7. The method according to claim 1, wherein the constant temperature reaction in step S3 is carried out at a temperature of 70 to 80 ℃ for a time of 2 to 4 hours.
8. The preparation method according to claim 1, wherein in the step S4, the mass ratio of the flame retardant, the light calcium carbonate, the sodium silicate, the environment-friendly adhesive and the modified mixed fiber is 5-10:3-5:4-8:100-120:40-60; the flame retardant is one or more of magnesium hydroxide, diethyl aluminum phosphinate and ammonium polyphosphate.
9. The method according to claim 1, wherein the pre-pressing in step S4 is performed at a temperature of 30-50 ℃, a pressure of 3-5MPa, and a time of 30-50S; the hot pressing treatment is carried out at 120-140 ℃, the pressure is 4-6MPa, and the time is 1-2min.
10. An environmentally friendly high density fiberboard prepared by the method of any one of claims 1-9.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433099A (en) * | 2011-09-09 | 2012-05-02 | 南京林业大学 | Preparation method of emulsification compatibilization soybean protein adhesive |
| CN102977844A (en) * | 2012-11-22 | 2013-03-20 | 北京林业大学 | Modified vegetable protein adhesive and preparation method thereof |
| CN116376485A (en) * | 2023-06-06 | 2023-07-04 | 太仓优上展示器具有限公司 | Environment-friendly flame-retardant adhesive, preparation method thereof and application thereof in plywood |
| CN117183050A (en) * | 2023-10-20 | 2023-12-08 | 湖北东润木业有限公司 | Flame-retardant high-density fiberboard and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433099A (en) * | 2011-09-09 | 2012-05-02 | 南京林业大学 | Preparation method of emulsification compatibilization soybean protein adhesive |
| CN102977844A (en) * | 2012-11-22 | 2013-03-20 | 北京林业大学 | Modified vegetable protein adhesive and preparation method thereof |
| CN116376485A (en) * | 2023-06-06 | 2023-07-04 | 太仓优上展示器具有限公司 | Environment-friendly flame-retardant adhesive, preparation method thereof and application thereof in plywood |
| CN117183050A (en) * | 2023-10-20 | 2023-12-08 | 湖北东润木业有限公司 | Flame-retardant high-density fiberboard and preparation method thereof |
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