CN111730697A - Wormwood modified veneer and preparation method thereof - Google Patents
Wormwood modified veneer and preparation method thereof Download PDFInfo
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- CN111730697A CN111730697A CN202010651230.XA CN202010651230A CN111730697A CN 111730697 A CN111730697 A CN 111730697A CN 202010651230 A CN202010651230 A CN 202010651230A CN 111730697 A CN111730697 A CN 111730697A
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- wormwood
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- veneer
- melamine
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- 235000003261 Artemisia vulgaris Nutrition 0.000 title claims abstract description 49
- 235000009051 Ambrosia paniculata var. peruviana Nutrition 0.000 title claims abstract description 48
- 235000003097 Artemisia absinthium Nutrition 0.000 title claims abstract description 48
- 235000017731 Artemisia dracunculus ssp. dracunculus Nutrition 0.000 title claims abstract description 48
- 239000001138 artemisia absinthium Substances 0.000 title claims abstract description 48
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 44
- 240000001851 Artemisia dracunculus Species 0.000 title claims abstract 13
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 48
- 239000001522 artemisia absinthium l. herb extract Substances 0.000 claims abstract description 31
- 229940119569 wormwood extract Drugs 0.000 claims abstract description 31
- 239000003607 modifier Substances 0.000 claims abstract description 29
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical class O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000001035 drying Methods 0.000 claims abstract description 26
- 239000011241 protective layer Substances 0.000 claims abstract description 21
- 229920005989 resin Polymers 0.000 claims abstract description 21
- 239000011347 resin Substances 0.000 claims abstract description 21
- 239000003292 glue Substances 0.000 claims abstract description 17
- 238000005470 impregnation Methods 0.000 claims abstract description 12
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 42
- 239000003795 chemical substances by application Substances 0.000 claims description 30
- 238000003756 stirring Methods 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 23
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 20
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 239000002585 base Substances 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 11
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 10
- 239000003063 flame retardant Substances 0.000 claims description 10
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims description 10
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 claims description 10
- 238000004513 sizing Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 239000010445 mica Substances 0.000 claims description 7
- 229910052618 mica group Inorganic materials 0.000 claims description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- 239000010410 layer Substances 0.000 claims description 6
- 229940120146 EDTMP Drugs 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- OIKHZBFJHONJJB-UHFFFAOYSA-N dimethyl(phenyl)silicon Chemical compound C[Si](C)C1=CC=CC=C1 OIKHZBFJHONJJB-UHFFFAOYSA-N 0.000 claims description 5
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000000839 emulsion Substances 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 5
- 239000004745 nonwoven fabric Substances 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- IDMOIRAAAVNXDY-UHFFFAOYSA-N OOP(OCCCCCCO1)(OP1(O)=O)=O Chemical group OOP(OCCCCCCO1)(OP1(O)=O)=O IDMOIRAAAVNXDY-UHFFFAOYSA-N 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 3
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000011282 treatment Methods 0.000 abstract description 9
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 5
- 240000006891 Artemisia vulgaris Species 0.000 description 36
- 239000002023 wood Substances 0.000 description 31
- 239000000243 solution Substances 0.000 description 25
- 239000011148 porous material Substances 0.000 description 17
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 14
- 229910052901 montmorillonite Inorganic materials 0.000 description 14
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 8
- 239000001768 carboxy methyl cellulose Substances 0.000 description 8
- 238000007731 hot pressing Methods 0.000 description 8
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 8
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 8
- 238000007598 dipping method Methods 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 238000003825 pressing Methods 0.000 description 5
- 230000002265 prevention Effects 0.000 description 5
- 238000002791 soaking Methods 0.000 description 5
- 244000166124 Eucalyptus globulus Species 0.000 description 4
- DZKXDEWNLDOXQH-UHFFFAOYSA-N 1,3,5,2,4,6-triazatriphosphinine Chemical compound N1=PN=PN=P1 DZKXDEWNLDOXQH-UHFFFAOYSA-N 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 description 2
- 241000238631 Hexapoda Species 0.000 description 2
- 244000082946 Tarchonanthus camphoratus Species 0.000 description 2
- 235000005701 Tarchonanthus camphoratus Nutrition 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000011120 plywood Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 241001435059 Artemisia argyi Species 0.000 description 1
- 235000010894 Artemisia argyi Nutrition 0.000 description 1
- 241000222122 Candida albicans Species 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- 241000191967 Staphylococcus aureus Species 0.000 description 1
- 241000190021 Zelkova Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229940095731 candida albicans Drugs 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 235000010204 pine bark Nutrition 0.000 description 1
- 230000001846 repelling effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
- B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D3/00—Veneer presses; Press plates; Plywood presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/003—Treating of wood not provided for in groups B27K1/00, B27K3/00 by using electromagnetic radiation or mechanical waves
- B27K5/0055—Radio-waves, e.g. microwaves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K2240/00—Purpose of the treatment
- B27K2240/30—Fireproofing
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention provides a wormwood modified veneer and a preparation method thereof, the veneer contains a wormwood modified resin impregnation protective layer, wherein the content of the wormwood extract is 0.1-3%, the preparation process of the wormwood modified veneer comprises the steps of preparation of modified melamine formaldehyde resin, preparation of a functional modifier containing the wormwood extract, glue preparation, preparation of a wormwood modified resin impregnation protective layer and post-treatment, the prepared wormwood modified veneer has natural antibacterial components and excellent impact resistance, the impact strength under drying reaches 53-55KJ/m2, and the prepared wormwood modified veneer is moisture-resistant and can be applied to places with higher humidity, such as kitchens, toilets and the like.
Description
Technical Field
The invention belongs to the technical field of household veneers, and particularly relates to a wormwood modified veneer and a preparation method thereof.
Background
A veneer is a surface material for indoor decoration or furniture manufacture, which is made up of natural wood or technical wood through cutting into slices with a certain thickness, adhering them to the surface of plywood, and hot pressing.
Common veneers are divided into natural wood veneer veneers and artificial veneer veneers. The appearance difference between the artificial veneer overlay and the natural wood veneer overlay is that the texture of the artificial veneer overlay is basically straight texture or regular pattern; the latter is natural wood pattern, and the texture pattern is natural, and the variability is bigger, random. It is characterized in that: not only has beautiful patterns of wood, but also achieves the purposes of fully utilizing wood resources and reducing the cost.
The invention discloses a preparation method of an insect-proof and moisture-proof wood veneer, which adopts pine bark and zelkova wood shavings as base materials, grinds the base materials into powder, adds camphor wood powder, mica powder, nano alumina powder and glass fiber, utilizes cool and rich smell of the camphor wood powder, and has the effects of insect prevention, moth prevention, mildew repelling and moisture prevention; the nano alumina powder can reduce the generation of static charges, the mica powder and the glass fiber can improve the overall strength of the wood veneer, and the prepared wood veneer has good insect prevention effect and moisture prevention effect. However, the addition of a large amount of inorganic particle components reduces the impact resistance of the veneer, and the strength is rapidly reduced particularly under humid conditions, greatly limiting the use of the veneer.
Disclosure of Invention
In order to solve the problems in the prior art and further optimize the prior art, the invention provides a wormwood modified veneer and a preparation method thereof, so as to realize the following purposes:
1. improve the impact strength
2. Improve the antibacterial and mildewproof performance
In order to solve the technical problems, the invention adopts the following technical scheme:
the wormwood modified veneer is characterized by comprising a wormwood modified resin impregnation protective layer, wherein the content of wormwood extract is 0.1-3%; the content of the modified melamine formaldehyde resin is 30-50%;
the preparation method of the wormwood modified veneer comprises the steps of material selection, preparation of modified melamine formaldehyde resin, preparation of a functional modifier containing wormwood extract, glue preparation, preparation of a wormwood modified resin impregnation protective layer and post-treatment;
selecting a wood material, namely selecting the wood material as eucalyptus or a xylophyta;
the preparation method of the modified melamine formaldehyde resin comprises the following steps:
1) dissolving formaldehyde in an ethanol solution, adding urotropine, dropwise adding a 40% NaOH solution to adjust the pH value to 8-9, stirring, and uniformly mixing;
2) adding melamine while stirring, heating to 65-70 ℃, keeping the temperature for reaction, and clarifying and transparent the solution;
3) adding modifier ethylenediamine tetramethylene phosphonic acid into the system, increasing the stirring speed, continuously stirring for reacting for 1-1.5h until the viscosity of the system is increased, stopping heating, and cooling at room temperature to obtain colorless transparent viscous modified melamine formaldehyde resin;
the addition amount of the urotropine is 0.35-0.5 percent of the melamine; the addition amount of the modifier is 5.5-8wt% of melamine;
the molar ratio of the melamine to the formaldehyde is 1: 2-2.3;
the viscosity of the modified melamine formaldehyde resin is 80-120mPa.s (at 25 ℃);
the preparation of the function modifier containing the wormwood extract comprises the steps of dissolving the wormwood extract into water, adding the montmorillonite porous nano material for soaking and mixing, adding the sodium carboxymethyl cellulose, and enabling the wormwood extract to fully enter the porous material to obtain the function modifier containing the wormwood extract;
the montmorillonite porous material has the mesh number of 1000-;
the soaking and mixing are carried out, and the bath ratio of the wormwood extract aqueous solution is 1: 10-15; stirring for 30-120min at the rotating speed of 30-60 r/min;
the addition amount of the sodium carboxymethylcellulose is 3.5-6 wt%;
the glue preparation and sizing agent comprises the following components in percentage by weight:
30-40% of modified melamine formaldehyde resin, 5-15% of a functional modifier containing wormwood extract, 1-3% of PMDI (polymethylenediamine) glue, 0.5-1.5% of a penetrating agent, 3-5% of a flame retardant, 1.2-2% of an organic silicon emulsion waterproof agent, 2-4% of a curing agent, 8-15% of mica powder, 3-5% of aluminum hydroxide and the balance of water;
the mass ratio of the penetrating agent, the dimethyl phenyl silane and the triethylene diamine is 2.2-3: 1;
the flame retardant is cek or polyamino cyclotriphosphazene;
the curing agent is hydroxy hexamethylene diphosphate or amino dimethylidene phosphoric acid;
preparing the wormwood modified resin impregnation protective layer, namely impregnating the fabric layer into sizing solution, and then performing microwave drying;
the microwave drying is carried out, the microwave power is 750-800W, and the irradiation is carried out for 8-10 min;
the surface material is made of plain base paper, printing decorative paper or non-woven fabric;
the resin impregnation protective layer containing the wormwood active ingredient has the water content of 3-6%;
the post-treatment comprises hot pressing, and the pressing is carried out under the conditions of 115-120 ℃ and 8-10MPa, wherein the pressing time is 280-350 s;
the water content of the finished product of the wormwood modified veneer is 0.5-0.9%.
By adopting the technical scheme, the invention has the beneficial effects that:
1. the wormwood modified veneer prepared by the method has the thickness of 6-13mm, the dry impact strength of 53-55KJ/m2, the static bending strength of 24-25.5MPa, high strength and good impact resistance;
2. the wormwood modified veneer prepared by the method has the impact strength of 42-46KJ/m2 in a wet state (with the water content of 10 percent), is good in moisture resistance, and can be applied to places with high humidity, such as kitchens, toilets and the like;
3. the wormwood modified veneer prepared by the method contains natural antibacterial components, has excellent antibacterial, mildew-proof and insect-proof performances, and has an antibacterial rate of 90-94% for common staphylococcus aureus, escherichia coli and candida albicans;
4. the wormwood modified veneer prepared by the method accords with the B1-B flame retardant grade according to the GB/T34722 detection standard, the total heat release amount in 600s is 2.5-3.3MJ, and the burning growth rate index is 10-13W/s; the phenomenon that filter paper is ignited by burning drips does not occur within 60 seconds, the veneer is not easy to burn, and the self-extinguishing capability is strong.
5. The wormwood modified veneer prepared by the method has high surface waterproof grade, and the 24-hour water absorption thickness expansion rate is 5.5-8.0%;
6. the wormwood modified veneer prepared by the method has the formaldehyde emission of 0.02-0.06mg/100g, meets the industrial standard, and is safe and environment-friendly;
the specific implementation mode is as follows:
the invention is further illustrated below with reference to specific examples.
Example 1A modified veneer made of Artemisia argyi and a method for manufacturing the same
1. Selecting materials
Selecting high-quality wood, processing the wood into a wood board with the thickness of 8mm, then putting the wood board into a microwave dryer for drying, and reducing the water content of the wood board to 4.5% to obtain a base material for later use;
the wood is eucalyptus;
2. preparation of modified melamine formaldehyde resin
1) Dissolving formaldehyde in an ethanol solution, adding urotropine, dropwise adding a 40% NaOH solution to adjust the pH to 8.0, stirring, and uniformly mixing;
2) adding melamine while stirring, heating to 70 ℃, keeping the temperature for reaction, and clarifying and transparent the solution;
3) adding modifier ethylenediamine tetramethylene phosphonic acid into the system, increasing the stirring speed, continuing stirring for reaction for 1h until the viscosity of the system is increased, stopping heating, and cooling at room temperature to obtain colorless transparent viscous modified melamine-formaldehyde resin;
the volume ratio of the formaldehyde to the ethanol is 1: 2;
the addition amount of the urotropine is 0.35 percent of that of the melamine;
the molar ratio of the melamine to the formaldehyde is 1: 2;
the addition amount of the modifier is 5.5wt% of melamine;
the viscosity of the modified melamine formaldehyde resin is 82.5mPa.s (at 25 ℃);
3. preparation of functional modifier containing wormwood extract
1) Adding appropriate amount of water into a beaker, heating to 90 deg.C in water bath, adding folium Artemisiae Argyi extract, stirring to dissolve completely, and bath ratio of 1: 10;
2) selecting a montmorillonite porous material, adding the montmorillonite porous material into the solution, soaking and mixing the montmorillonite porous material with a wormwood extract solution, adding sodium carboxymethylcellulose, stirring for 30min at a rotating speed of 60r/min to enable the wormwood extract to fully enter the porous material, and filtering and drying to obtain a function modifier containing the wormwood extract;
the montmorillonite porous material has the mesh number of 1000 meshes;
the addition amount of the sodium carboxymethylcellulose is 3.5 wt%;
4. glue preparation
Uniformly mixing the modified melamine formaldehyde resin, a functional modifier containing wormwood extract, a curing agent, a penetrating agent and other required auxiliaries to prepare a glue application liquid for later use;
the sizing solution comprises the following components in percentage by weight:
30% of modified melamine formaldehyde resin, 5% of a functional modifier containing wormwood extract, 1% of PMDI (polymethylenediamine) glue, 0.5% of a penetrating agent, 3.0% of a flame retardant, 1.2% of an organic silicon emulsion waterproof agent, 2% of a curing agent, 8% of mica powder, 3% of aluminum hydroxide and the balance of water;
the mass ratio of the penetrating agent, the dimethyl phenyl silane and the triethylene diamine is 2.2: 1;
the flame retardant is cek;
the curing agent is hydroxy hexamethylene diphosphate;
5. preparation of wormwood modified resin impregnation protective layer
Dipping the fabric layer into the sizing solution, and carrying out ultrasonic dipping for 2h under the condition that the ultrasonic power is 250 HZ; then drying by microwave to obtain a resin impregnated protective layer containing the effective components of the wormwood;
the surface material is made of plain base paper, printing decorative paper or non-woven fabric;
the microwave drying is carried out, the microwave power is 750W, and the irradiation is carried out for 10 min;
the resin containing the effective component of the wormwood is impregnated in the protective layer, and the water content is 3.0%;
6. post-treatment
Gluing a base material, sticking the prepared resin impregnated protective layer containing the effective components of the wormwood on the base material, and carrying out hot pressing, surface modification, sanding, drying and other treatments to obtain a finished product of the wormwood modified veneer;
the hot pressing is carried out under the conditions of 115 ℃ and 8MPa, and the pressing time is 280 s;
drying is carried out, wherein the temperature of an oven is 70 ℃, and the drying time is 6 h;
the water content of the finished wormwood modified veneer is 0.6%.
Example 2 modified moxa veneer and preparation method thereof
1. Selecting materials
Selecting high-quality wood, processing the wood into a wood board with the thickness of 8mm, then putting the wood board into a microwave dryer for drying, and reducing the water content of the wood board to 4.0% to obtain a base material for later use;
the wood is eucalyptus;
2. preparation of modified melamine formaldehyde resin
1) Dissolving formaldehyde in an ethanol solution, adding urotropine, dropwise adding a 40% NaOH solution to adjust the pH to 8.8, stirring, and uniformly mixing;
2) adding melamine while stirring, heating to 70 ℃, keeping the temperature for reaction, and clarifying and transparent the solution;
3) adding modifier ethylenediamine tetramethylene phosphonic acid into the system, increasing the stirring speed, continuously stirring for reacting for 1.5h until the viscosity of the system is increased, stopping heating, and cooling at room temperature to obtain colorless transparent viscous modified melamine formaldehyde resin;
the volume ratio of the formaldehyde to the ethanol is 1: 4;
the addition amount of the urotropine is 0.40 percent of that of the melamine;
the molar ratio of the melamine to the formaldehyde is 1: 2.2;
the addition amount of the modifier is 6.5wt% of melamine;
the viscosity of the modified melamine formaldehyde resin is 88.8mPa.s (25 ℃);
3. preparation of functional modifier containing wormwood extract
1) Adding appropriate amount of water into a beaker, heating to 90 deg.C in water bath, adding folium Artemisiae Argyi extract, stirring to dissolve completely, and bath ratio of 1: 15;
2) selecting a montmorillonite porous material, adding the montmorillonite porous material into the solution, soaking and mixing the montmorillonite porous material with a wormwood extract solution, adding sodium carboxymethylcellulose, stirring for 120min at a rotating speed of 30r/min to allow the wormwood extract to fully enter the porous material, and filtering and drying to obtain a function modifier containing the wormwood extract;
the mesh number of the montmorillonite porous material is 2000 meshes;
the addition amount of the sodium carboxymethylcellulose is 4.5 wt%;
4. glue preparation
Uniformly mixing the modified melamine formaldehyde resin, a functional modifier containing wormwood extract, a curing agent, a penetrating agent and other required auxiliaries to prepare a glue application liquid for later use;
the sizing solution comprises the following components in percentage by weight:
35% of modified melamine formaldehyde resin, 10% of a functional modifier containing wormwood extract, 2% of PMDI (polymethylenediamine) glue, 1.0% of a penetrating agent, 3.5% of a flame retardant, 1.5% of an organic silicon emulsion waterproof agent, 3% of a curing agent, 12% of mica powder, 4.5% of aluminum hydroxide and the balance of water;
the mass ratio of the penetrating agent, the dimethyl phenyl silane and the triethylene diamine is 2.5: 1;
the flame retardant is polyamino cyclotriphosphazene;
the curing agent is amino dimethylidene phosphoric acid;
5. preparation of wormwood modified resin impregnation protective layer
Dipping the fabric layer into the sizing solution, and performing dipping ultrasonic treatment for 1h under the condition that the ultrasonic power is 280 HZ; then drying by microwave to obtain a resin impregnated protective layer containing the effective components of the wormwood;
the surface material is made of plain base paper, printing decorative paper or non-woven fabric;
the microwave drying is carried out, the microwave power is 800W, and the irradiation is carried out for 10 min;
the resin containing the effective component of the wormwood is impregnated in the protective layer, and the water content is 5.2%;
6. post-treatment
Gluing a base material, sticking the prepared resin impregnated protective layer containing the effective components of the wormwood on the base material, and carrying out hot pressing, surface modification, sanding, drying and other treatments to obtain a finished product of the wormwood modified veneer;
the hot pressing is carried out under the conditions of 120 ℃ and 10MPa, and the pressing time is 350 s;
drying is carried out, wherein the temperature of an oven is 70 ℃, and the drying time is 6 h;
the water content of the finished product of the wormwood modified veneer is 0.9%.
Example 3A modified plywood made of mugwort and a method for manufacturing the same
1. Selecting materials
Selecting high-quality wood, processing the wood into a wood board with the thickness of 8mm, then putting the wood board into a microwave dryer for drying, and reducing the water content of the wood board to 3.5% to obtain a base material for later use;
the wood is eucalyptus;
2. preparation of modified melamine formaldehyde resin
1) Dissolving formaldehyde in an ethanol solution, adding urotropine, dropwise adding a 40% NaOH solution to adjust the pH to 8.9, stirring, and uniformly mixing;
2) adding melamine while stirring, heating to 70 ℃, keeping the temperature for reaction, and clarifying and transparent the solution;
3) adding modifier ethylenediamine tetramethylene phosphonic acid into the system, increasing the stirring speed, continuing stirring for reaction for 1h until the viscosity of the system is increased, stopping heating, and cooling at room temperature to obtain colorless transparent viscous modified melamine-formaldehyde resin;
the volume ratio of the formaldehyde to the ethanol is 1: 4;
the addition amount of the urotropine is 0.5 percent of that of the melamine;
the molar ratio of the melamine to the formaldehyde is 1: 2.3;
the addition amount of the modifier is 7.8wt% of melamine;
the viscosity of the modified melamine formaldehyde resin is 100.5mPa.s (at 25 ℃);
3. preparation of functional modifier containing wormwood extract
1) Adding appropriate amount of water into a beaker, heating to 90 deg.C in water bath, adding folium Artemisiae Argyi extract, stirring to dissolve completely, and bath ratio of 1: 15;
2) selecting a montmorillonite porous material, adding the montmorillonite porous material into the solution, soaking and mixing the montmorillonite porous material with a wormwood extract solution, adding sodium carboxymethylcellulose, stirring for 120min at a rotating speed of 30r/min to allow the wormwood extract to fully enter the porous material, and filtering and drying to obtain a function modifier containing the wormwood extract;
the mesh number of the montmorillonite porous material is 2000 meshes;
the addition amount of the sodium carboxymethylcellulose is 5.0 wt%;
4. glue preparation
Uniformly mixing the modified melamine formaldehyde resin, a functional modifier containing wormwood extract, a curing agent, a penetrating agent and other required auxiliaries to prepare a glue application liquid for later use;
the sizing solution comprises the following components in percentage by weight:
40% of modified melamine formaldehyde resin, 15% of a functional modifier containing wormwood extract, 3% of PMDI (polymethylenediamine) glue, 1.5% of a penetrating agent, 5% of a flame retardant, 2% of an organic silicon emulsion waterproof agent, 4% of a curing agent, 15% of mica powder, 5% of aluminum hydroxide and the balance of water;
the mass ratio of the penetrant, the dimethyl phenyl silane to the triethylene diamine is 3: 1;
the flame retardant is polyamino cyclotriphosphazene;
the curing agent is hydroxy hexamethylene diphosphate;
5. preparation of wormwood modified resin impregnation protective layer
Dipping the fabric layer into the sizing solution, and carrying out ultrasonic dipping for 2h under the condition that the ultrasonic power is 250 HZ; then drying by microwave to obtain a resin impregnated protective layer containing the effective components of the wormwood;
the surface material is made of plain base paper, printing decorative paper or non-woven fabric;
the microwave drying is carried out, the microwave power is 750W, and the irradiation is carried out for 10 min;
the resin containing the effective component of the wormwood is impregnated in the protective layer, and the water content is 5.0%;
6. post-treatment
Gluing a base material, sticking the prepared resin impregnated protective layer containing the effective components of the wormwood on the base material, and carrying out hot pressing, surface modification, sanding, drying and other treatments to obtain a finished product of the wormwood modified veneer;
the hot pressing is carried out under the conditions of 120 ℃ and 10MPa, and the pressing time is 280 s;
drying is carried out, wherein the temperature of an oven is 70 ℃, and the drying time is 6 h;
the water content of the finished wormwood modified veneer is 0.5%.
Comparative example 1:
the same procedure as in example 3 was repeated except that no function modifier containing the wormwood extract was added.
Comparative example 2:
the same procedure as in example 3 was repeated except that only the conventional commercially available melamine formaldehyde resin was used without modification.
The performance indexes of the wormwood modified veneer prepared by adopting the technical schemes of the examples 1-3 and the comparative examples 1-2 are as follows:
finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The wormwood modified veneer is characterized by comprising a wormwood modified resin impregnation protective layer, wherein the content of wormwood extract is 0.1-3%; the content of the modified melamine formaldehyde resin is 30-50%.
2. The preparation method of the wormwood modified veneer is characterized by comprising the steps of preparation of modified melamine formaldehyde resin, glue preparation and preparation of a wormwood modified resin impregnation protective layer.
3. The preparation method according to claim 2, wherein the preparation of the modified melamine formaldehyde resin comprises the following steps:
1) dissolving formaldehyde in an ethanol solution, adding urotropine, dropwise adding a 40% NaOH solution to adjust the pH value to 8-9, stirring, and uniformly mixing;
2) adding melamine while stirring, heating to 65-70 ℃, keeping the temperature for reaction, and clarifying and transparent the solution;
3) adding modifier ethylenediamine tetramethylene phosphonic acid into the system, increasing the stirring speed, continuously stirring for reaction for 1-1.5h until the viscosity of the system is increased, stopping heating, and cooling at room temperature to obtain the colorless transparent viscous modified melamine formaldehyde resin.
4. The preparation method of claim 3, wherein the urotropine is added in an amount of 0.35-0.5% of the melamine; the addition amount of the modifier is 5.5-8wt% of melamine.
5. The process according to claim 3, wherein the molar ratio of melamine to formaldehyde is from 1:2 to 2.3.
6. The preparation method of claim 2, wherein the composition of the glue preparation and the glue application liquid comprises the following components in percentage by weight:
30-40% of modified melamine formaldehyde resin, 5-15% of a functional modifier containing wormwood extract, 1-3% of PMDI (polymethylenediamine) glue, 0.5-1.5% of a penetrating agent, 3-5% of a flame retardant, 1.2-2% of an organic silicon emulsion waterproof agent, 2-4% of a curing agent, 8-15% of mica powder, 3-5% of aluminum hydroxide and the balance of water.
7. The preparation method according to claim 6, wherein the mass ratio of the penetrant, the dimethylphenylsilane to the triethylenediamine is 2.2-3: 1; the curing agent is hydroxy hexamethylene diphosphate or amino dimethylidene phosphoric acid.
8. The preparation method according to claim 2, wherein the wormwood modified resin impregnation protection layer is prepared by impregnating a fabric layer into a sizing solution and then performing microwave drying; and (3) performing microwave drying with microwave power of 750-800W, and irradiating for 8-10 min.
9. The preparation method of claim 8, wherein the facing material is plain base paper, printing decorative paper or non-woven fabric.
10. The method according to claim 8, wherein the resin-impregnated protective layer containing the effective component of wormwood has a water content of 3 to 6%.
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