CN105666619B - A kind of oriented wood chipboard - Google Patents
A kind of oriented wood chipboard Download PDFInfo
- Publication number
- CN105666619B CN105666619B CN201610125947.4A CN201610125947A CN105666619B CN 105666619 B CN105666619 B CN 105666619B CN 201610125947 A CN201610125947 A CN 201610125947A CN 105666619 B CN105666619 B CN 105666619B
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- veneer
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- weight
- wood
- Prior art date
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- 239000011093 chipboard Substances 0.000 title abstract 3
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- 238000000354 decomposition reaction Methods 0.000 claims abstract description 20
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- 239000003292 glue Substances 0.000 claims abstract description 13
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- 244000068988 Glycine max Species 0.000 description 12
- 235000010469 Glycine max Nutrition 0.000 description 12
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 12
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- 238000004061 bleaching Methods 0.000 description 9
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Classifications
-
- 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
- B27K5/02—Staining or dyeing wood; Bleaching wood
-
- 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
-
- 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
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- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
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- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
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- C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
- C08G12/40—Chemically modified polycondensates
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
- C08K5/3477—Six-membered rings
- C08K5/3492—Triazines
- C08K5/34922—Melamine; Derivatives thereof
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- 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
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- 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
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- C09J11/06—Non-macromolecular additives organic
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Abstract
The present invention relates to a kind of plank, especially a kind of oriented wood chipboard.It includes that sandwich layer orients four layers of wood shavings layer and overlaying respectively of mating formation and is glued at the finish coat that sandwich layer orients four layers of wood shavings layer upper and lower surface of mating formation；Finish coat is any one in facing paper, natural veneer or scientific and technological wood skin；Wherein, when finish coat is facing paper, four layers of sandwich layer orientation, which mats formation also directly to overlay between wood shavings layer and finish coat, is bonded with balance layer；Facing paper is to be impregnated with melamine resin or cyanurotriamide modified Lauxite glue and the facing paper for being impregnated with Formaldehyde decomposition glue；Scientific and technological wood skin is scientific and technological wood skin of the functional form science and technology flitch through required thickness made of slicing.Oriented wood chipboard decorative effect of the present invention is true to nature, at low cost, purifying formaldehyde effect is good.
Description
Technical Field
The invention relates to a plate, in particular to an oriented strand board.
Background
Along with the increasingly prominent problem of global warming, the extremely severe climate is frequent, and low-carbon economy with the theme of 'low emission, low pollution and low energy consumption' is more and more accepted and advocated by people. Under such background conditions, the wood industry is playing an increasingly important role in developing low-carbon economy and coping with climate change by utilizing the inherent characteristics of 'green', 'environment-friendly' and 'clean'. The wood and wood products have good carbon fixing effect. As long as the wood and the wooden products are not rotten or burnt, the carbon fixing function of the wood and the wooden products can be stably continued for a long time. Some carbon fixing time can reach dozens of years and hundreds of years. Therefore, the use of the wood is increased, the service lives of the wood and the wood products are prolonged as far as possible, and the method has important significance for reducing energy consumption and increasing emission reduction. According to the calculation, the average amount of carbon dioxide 1470kg can be fixed and oxygen 1070kg can be released when the forest produces 1 ton of wood.
Wood is the only renewable natural resource among the four major building materials. The world forest is continuously reduced, according to the statistics of world forest resources by the food and agriculture organization of the United nations, the world forest area is about 40 hundred million hm2 in 2010, and the evaluation result in 1990 is about 40.8 hundred million hm 2. From the year change, the world forest area is reduced by about 400 ten thousand hm2 every year in 1990-2010. The protection of natural forests and the cultivation of artificial fast-growing forests are the best measures for maintaining ecological balance and meeting the requirements of people on wood, environmental protection measures are more and more in the world, and the coordination of the relationship between economic development and environmental protection becomes a main issue of concern in various countries.
Along with the gradual reduction of forest resources, the application amount of artificial fast growing woods is larger and larger, and along with the gradual reduction of natural precious tree species and woods, the fast growing woods are deeply processed to have the characteristics of the precious tree species, so that the consumption of the precious tree species and woods is reduced instead, and the method becomes a new problem for sustainable development of the wood processing industry. The recombined decorative material (commonly known as 'technical wood') is one of the important achievements of the new subject. The technical wood takes the artificial fast-growing wood as a raw material, the microstructure and the inherent properties of the wood are not damaged in the manufacturing process, all the natural properties of heat insulation, temperature regulation, humidity regulation and the like of the natural wood are completely reserved, a plurality of natural defects of the artificial fast-growing wood are overcome, the high-value utilization of the wood can be realized, and the technical innovation of the industry is led to achieve the sustainable development of the industry.
The recombined decorative material originally originated from the uk and italy in the 30 s of the 20 th century, and the sliced veneer was developed mainly by using raw wood. In 60 s, Italy and England research and development successively used rotary cut veneer of common tree as raw material, and through veneer bleaching, dyeing, wet adhering, cold pressing and slicing, artificial veneer is produced. In the early 70 s, companies such as Alpi, IPir and japan panasonic electrician in italy realized the industrial production of the technical wood, and a research and development center of the technical wood was provided to specially research and develop the technical technology of the technical wood production. In the early 80 s, China began to enter the technical wood industry. In recent thirty years, a great deal of research and industrial development has been conducted in italy and japan mainly around the manufacturing equipment of technical woods and the functionalization of products. Technical wood extends from the original single decorative veneer to technical wood sawn timber, composite floors, fire-proof boards, outdoor wood structure products to various artware, living goods and cultural and literature goods. Technical wood, as a renewable new environment-friendly material, has penetrated into various fields of people's lives.
The development of the heavy-duty decorative materials in China began in the 80 th of the 20 th century. In early 1980, the Uygur group started to research and develop technical wood, and in units such as Shanghai wood industry research institute and Shanghai furniture research institute, radial texture imitation rosewood veneer was produced in a trial mode, and in 1987, chord-direction texture and special-shape texture dyed artificial veneer was produced in a trial mode and put on the market in small batches. In 1988, the institute of Wood industry of China institute of forestry sciences developed wet and cold glue pressed battens. The 1996 Nanjing university of forestry and China forest academy of sciences jointly study the production technology of the artificial decorative veneer, and the artificial veneers with different textures and different colors are trial-produced.
Currently, functionalization is an important direction in the development of restructured decorative materials. CN103171014B (2015-4-15) discloses a preparation method of technical wood, however, the technical wood has high formaldehyde release amount, and dyeing agents are difficult to permeate, easy to run off, difficult to resist weather, poor in compatibility with water-based adhesives and serious in environmental pollution in the bleaching and dyeing process; because the fire retardant seriously interferes the color development of the coloring agent and the interface gluing of the coloring veneer, the technical wood is not subjected to fire retardant treatment, and the functionality of the technical wood is still to be improved.
Disclosure of Invention
The invention aims to provide an oriented strand board which has vivid decoration effect, low cost and good formaldehyde purification effect.
The technical purpose of the invention is realized by the following technical scheme:
an oriented strand board comprises four oriented paving shaving layers of a core layer and veneer layers which are respectively pressed and glued on the upper surface and the lower surface of the four oriented paving shaving layers of the core layer;
the decorative layer is any one of decorative paper, natural veneer or technical veneer;
when the veneer layer is made of scientific wood veneer, the scientific wood veneer is made of functional scientific battens which are sliced into scientific wood veneers with required thickness; the preparation method of the functional type scientific and technological flitch comprises the following steps:
(1) a blank single plate is manufactured by rotary cutting or slicing, and the blank single plate is cut into a required size to obtain a single plate A;
(2) carrying out soaking, toughening and flame-retardant dyeing treatment on the veneer A in ternary compound dye consisting of a biomass nanocellulose solubilizer, a flame retardant and an acid dye to obtain a veneer B;
(3) adding formaldehyde decomposition powder into the modified MUF adhesive, uniformly stirring, and performing adhesive distribution on the veneer B to obtain a veneer C;
(4) assembling the C single board, performing cold pressing treatment to obtain a D batten, and sawing the D batten into required patterns and sizes to obtain a finished product;
the acid dye is a bisazo compound:
，
wherein,
m1, M2 are independently from each other hydrogen or an alkali metal;
R1is hydrogen, C1-C4Alkyl or halogen;
R2is hydrogen;
x is halogen;
y is-CH = CH2
When the decorative layer is decorative paper, a balance layer is directly pressed and adhered between the oriented four layers of the core layer, the paving shaving layer and the decorative layer; soybean adhesive enhancement layers are respectively arranged among the directional four-layer paving shaving layer of the core layer, the balance layer and the veneer layer;
the soybean adhesive comprises the following raw materials in parts by mass:
100 parts of water;
15-40 parts of soybean protein powder;
3-8 parts of alkali;
0.5-3 parts of silicate;
0.2-5 parts of modifier urea;
0.3-2.5 parts of curing agent polyamide polyamine-epichlorohydrin;
0.1-4 parts of acid;
0.1-20 parts of diphenylmethane diisocyanate;
0.5-3 parts of vinyl acetate resin;
0.1-1.5 parts of pyrethroid insecticide;
1-10 parts of filler.
The addition of the diphenylmethane diisocyanate MDI and the vinyl acetate PVAC in a ratio can increase the cohesiveness of the soybean adhesive; the first solid additive and the second solid additive with different particle sizes and types can improve the compression resistance and the wear resistance of the soybean adhesive, and improve the cohesiveness, the functionality and the compression resistance and the wear resistance among all layers of the oriented strand board.
According to the invention, through interface regulation design, biomass nanotechnology and synergistic compounding process, the problem of diversified matching of the flame retardant, the coloring agent and the adhesive is effectively solved, and one material with multiple functions of the manufacturing technology of the recombined decorative material is realized. According to the invention, through researching the photosensitive, temperature-sensitive and humidity-sensitive characteristics of the recombined decorative material and the color change mechanism and the flame retardant theory of the traditional dye, the high-fastness ternary compound fuel and the modified MUF adhesive are developed, and a novel process for synergetic dipping flame retardant treatment is researched, so that the weather-resistant and efficient flame retardant smoke suppression recombined decorative material is created. The recombined decorative material has low release amount of formaldehyde and VOC, the formaldehyde purification efficiency reaches over 75 percent, and the durability of the formaldehyde purification effect is more than 60 percent; the dyeing agent has good penetrating function, is not easy to run off, is weather-proof, has good compatibility with the water-based adhesive, and adopts biological environment-friendly dye, thereby greatly reducing pollution. And the flame retardant function is added in the modified MUF adhesive, so that the modified MUF adhesive and the ternary compound dye have good matching synergy.
The formaldehyde release limit of the facing oriented strand board of the invention completely reaches E0 level, the cost of the floor is much lower than that of a solid wood floor and a solid wood composite floor, the cost is slightly higher than that of a strengthened floor, but the cost performance is higher than that of other floors, and the facing oriented strand board has great market prospect.
The invention adopts the core layer oriented four-layer paving shaving layer and the balance layer of the upper surface and the lower surface, and simultaneously improves the density of the surface layer, so that the density distribution of the plate is more reasonable; the stress generated by the difference of the transverse tensile strength and the anti-shrinkage strength of the veneer is dispersed, the transverse strength of the veneer is increased, and the cold and heat cycle resistance of the surface of a final product is improved.
Preferably, when the veneer layer is made of scientific wood veneer or natural wood veneer, a soybean adhesive enhancement layer is arranged between the core layer oriented four-layer paving shaving layer and the veneer layer.
Preferably, when the decorative layer is decorative paper, the decorative paper is impregnated with melamine formaldehyde resin or melamine modified urea formaldehyde resin, and decorative paper added with formaldehyde decomposition glue solution.
Preferably, the core layer oriented four-layer paving shaving layer is prepared by arranging glue-mixed shavings in an oriented way according to the fiber direction of the glue-mixed shavings; the thickness of the facing layer is 0.3-2.0 mm; the thickness of the oriented four-layer paving shaving layer of the core layer is 2.5-25 mm.
The decorative layer and the core layer with specific thickness are selected, so that the decorative effect is vivid, the cost is low, and the formaldehyde purification effect is good.
Preferably, the balance layer is a single plate with the thickness of 0.3-1.2 mm.
Preferably, a flexible reinforcing material layer is arranged between the core layer directional four-layer paving shaving layer and the veneer layer; the thickness of the flexible reinforced material layer is 0.05-0.15 mm; the flexible reinforcing material is non-woven fabric or kraft paper.
Preferably, the preparation method of the modified MUF adhesive in the step (3) comprises the following steps:
A. putting 100 parts by weight of formaldehyde aqueous solution with mass concentration of 36.5-37.4wt%, 0.1-0.5 part by weight of alkaline substance solution with mass concentration of 30-50wt% and 0.3-0.6 part by weight of amino-terminated hyperbranched polymer PAMAM into a reaction kettle, and starting stirring;
B. adding 1-4 parts of hexachlorocyclotriphosphazene, heating to 50-55 ℃, adding 35-55 parts of melamine when the temperature is automatically raised to 75-85 ℃, and continuously heating to 90-95 ℃ for reaction to obtain a primary polycondensate;
C. adding 40-45 parts of melamine into the primary polycondensate, and adding 0.6-0.9 part of p-toluenesulfonamide to obtain a second polycondensate;
D. and cooling the second polycondensate to 70-75 ℃, adding 20-30 parts of urea, continuously reacting for 8-12min, and discharging the glue when the temperature is reduced to 30-50 ℃.
According to the invention, p-toluenesulfonamide and amino-terminated hyperbranched polymer PAMAM are adopted for modification, urea, melamine and formaldehyde are added in stages and in stages for multiple times, so that the content of an intermediate of the modified MUF resin adhesive in the preparation process is maximized, the strength and the wear resistance of the plate can be improved, and the service life of the plate can be prolonged; the MUF resin is modified by utilizing a large number of active functional groups in the amino-terminated hyperbranched polymer PAMAM and the highly branched characteristic of the structure of the amino-terminated hyperbranched polymer PAMAM, so that the performance of the resin is enhanced, the stability is improved, and the release amount of free formaldehyde is effectively controlled; the formaldehyde emission of the technical wood treated by the modified MUF adhesive is less than 0.2mg/L and reaches the four-star standard of Japan F;
meanwhile, urea, melamine and formaldehyde are used as matrixes, chlorine is easily substituted by utilizing the activity of phosphorus-chlorine bonds in hexachlorocyclotriphosphazene, a series of phosphazene compounds (shown as a reaction formula I) are prepared through substitution reaction, and if nucleophilic substitution reaction is carried out on the phosphazene compounds and urea, the phosphazene compounds and the phosphonitrile compounds are added into the matrixes to participate in polycondensation reaction, so that phosphazene groups (shown as a reaction formula II) are introduced. The phosphonitrile group is a six-membered ring and is quite stable, P, N alternate double bonds are arranged, the phosphonitrile group exists in a ring or linear structure, and phosphorus and nitrogen have a good synergistic effect, namely the phosphorus has a heat absorption effect similar to metaphosphoric acid, and the nitrogen has an effect of diluting oxygen by inert gas, so that the modified MUF adhesive disclosed by the invention has good high-temperature resistance and flame retardant effect, is less in smoke generation and toxic gas and has an environment-friendly flame retardant effect.
Reaction formula one
Reaction formula II
More preferably, the alkaline substance in step a of the preparation method of the modified MUF adhesive is sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide or ammonia water.
Preferably, the formaldehyde decomposition powder in the step (3) comprises chitin, nano silicon wafers and tourmaline powder; the tourmaline powder accounts for 0-5wt% of the mass of the formaldehyde decomposition powder.
The effective components of the formaldehyde decomposition used in the invention are amino polymer and other biomass materials, nano materials and tourmaline powder, and the formaldehyde decomposition agent is non-toxic and harmless and has a healthy production environment. The board treated by the formaldehyde decomposition glue powder has the functions of adsorbing and decomposing formaldehyde on the surface, purifying air and improving the environmental quality index. The formaldehyde purification efficiency reaches over 75 percent, and the durability of the formaldehyde purification effect is more than 60 percent.
Preferably, the ternary complex dye in the step (2) is prepared from a biomass nanofiber solubilizer, a flame retardant and an acidic disazo dye compound solution according to a mass ratio of 1: 25-40: 100-300 are compounded;
the biomass nano-fiber solubilizer is prepared by adding 1-3 parts by weight of bamboo leaf flavone, 0.5-0.8 part by weight of β -cyclodextrin peppermint oil micro powder and 3-6 parts by weight of nano-particle-size silicon dioxide and/or 2-5 parts by weight of aluminum hydroxide into cellulose colloidal suspension consisting of 4-7 parts by weight of cellulase and 80-150 parts by weight of microcrystalline cellulose, then adding 0.5-1.8 parts by weight of 3-chloro-hydroxypropyl triethyl ammonium chloride, and stirring and reacting at 60-80 ℃ for 18-30 min.
the ternary complex dye comprises a biomass nanofiber solubilizer and a dye, the surface of the ternary complex dye contains rich hydroxyl carboxyl, the ternary complex dye can be tightly combined with wood fiber, and the binding force of dye molecules in wood is improved.
more preferably, the β -cyclodextrin peppermint oil micro powder is prepared by mixing β -cyclodextrin and peppermint oil according to the mass ratio of 8-15: 40-65 at the temperature of 20-30 ℃, and embedding the peppermint oil into the inner cavity of the β -cyclodextrin in a molecular form to form β -cyclodextrin peppermint oil micro powder in an inclusion compound form;
the extraction method of the bamboo leaf flavone comprises the following steps: selecting dry leaves of lower part of bamboo of more than six years old in Dryokohama delavayi, and pulverizing into 0.5-0.8mm folium Bambusae fine powder; dissolving with 75-85wt% methanol solution, performing ultrasonic treatment for 28-35min, dissolving with 75-85wt% methanol solution, filtering, and separating by column chromatography.
More preferably, the acid disazo dye compound in the step (2) is
，
Wherein,
m1, M2 are independently from each other hydrogen or an alkali metal;
R1is hydrogen, C1-C4Alkyl or halogen;
R2is hydrogen;
x is halogen;
y is-CH = CH2。
The acid dye used on the technical wood has better weather resistance and wear resistance. Preferably, in the step (1), a blank single plate is prepared by rotary cutting or slicing, and after the blank single plate is cut into a required size, carbonization heat treatment at different carbonization temperatures is carried out to obtain the single plate A.
More preferably, the carbonization heat treatment comprises the steps of putting the veneer into wood carbonization equipment, rapidly heating and humidifying, heating to 80-90 ℃, humidifying to 70-80% relative humidity, keeping for 2-4 h, heating to 125-135 ℃ by adopting a step-type heating method according to the speed of (30-40 ℃) to h, keeping for 2-4 h, then heating to 175-200 ℃ by adopting a step-type heating method, keeping for 2-4 h at the highest temperature, stopping heating and atomized water for bundling carbonization when the temperature of the wood is rapidly reduced to below 80 ℃ in the carbonization equipment by adopting a water spraying method after the temperature is increased, and immediately taking the wood out of the kiln when the temperature is naturally reduced to 40-60 ℃.
Preferably, before the step (2), the veneer A is bleached;
the bleaching treatment comprises the following steps:
firstly, preprocessing, namely putting the wood veneer into a sodium hydroxide solution with the pH value of 9-11 for 1-3 h to prepare a preprocessed veneer;
alkaline decoloring:
preparing a solution A: the solution A is a mixed solution containing the following substances by mass concentration: 4-7% of hydrogen peroxide, 0.2-0.8% of sodium silicate, 0.05-0.1% of ethylene diamine tetraacetic acid, 0.05-0.15% of sodium sulfate, 0.05-0.1% of magnesium sulfate, 0.5-1% of sodium hydroxide, 0.4-0.8% of ammonia water and water as a solvent;
pouring the solution A into water at the temperature of 55-65 ℃, and adjusting the pH value to 9-11 by using sodium hydroxide to prepare a solution A temporary solution; placing the pretreated veneer into the solution A for decolorizing treatment, slowly heating to 80-90 ℃ at a heating rate of 5-10 ℃/h during treatment, and treating for 2-4 h to obtain an alkaline decolorizing treated veneer;
acid decoloring:
preparing a solution B: the solution B is a mixed solution containing the following substances by mass: 1-3% of sodium chlorate, 0.02-0.2% of sulfamic acid, 0.5-1.5% of oxalic acid, 0.1-0.5% of acetic acid, 0.3-1% of phosphoric acid and water as a solvent;
pouring the solution B into water at the temperature of 45-55 ℃, and adjusting the pH value to 4-6 by using phosphoric acid to prepare a solution B clinical solution; taking the alkaline decolorizing-treated veneer out of the solution A, washing with water, and then placing in the solution B for decolorizing treatment for 2-4 h to obtain an acidic decolorizing-treated veneer;
and fourthly, cleaning and drying, namely taking the acid decoloration treated veneer out of the solution B temporary solution, putting the veneer into clean water for soaking for 1-2 hours, and then drying.
Preferably, the soaking, toughening, flame retarding and dyeing treatment in the step (2) comprises heating treatment at a temperature of 80-95 ℃.
Preferably, the step (2) of soaking, toughening, flame-retarding and dyeing further comprises ultrasonic vibration treatment, wherein the frequency of the ultrasonic vibration treatment is 1-3.5 × 104Hertz, vibration time of 30-120 min.
Preferably, after the adhesive is discharged in the step D, 5-10 parts of formaldehyde capture agent and 1-3 parts of curing agent are added into the modified MUF adhesive in the using process;
the preparation method of the formaldehyde scavenger comprises the following steps: 10-20 parts of urea is crushed, 5-10 parts of melamine, 8-12 parts of p-toluenesulfonic acid dihydrazide, 6-7 parts of amine sulfonate and 1-2 parts of nano silicon dioxide are added, and the mixture is fully and uniformly stirred.
The addition of the resin type formaldehyde catching agent further reduces the molar ratio of urea and formaldehyde of the main body adhesive of the urea-formaldehyde resin, and free urea and a light methyl compound with reaction activity which are still in the system can react with the formaldehyde in the main body adhesive, thereby effectively reducing the formaldehyde release amount of the final artificial board.
More preferably, the preparation method of the curing agent is as follows: adding 100 parts of water into a reaction kettle, starting stirring, heating to 40-50 ℃, adding 20-30 parts of aluminum sulfate and 10-15 parts of p-toluenesulfonic acid, completely dissolving, cooling to room temperature, and discharging.
More preferably, the preparation method of the modified MUF adhesive further comprises the steps of sequentially adding 6-9 parts of a first compound regulator and 7-11 parts of a second compound regulator after adding the formaldehyde catching agent;
the first composite regulator is prepared by mixing the following components in a mass ratio of 1: 3-4: 1-2 parts of trioctyl methyl ammonium bromide, glycerol and polytetrafluoroethylene;
the first composite regulator is prepared by mixing the following components in a mass ratio of 1: 2-4: 1-3 parts of diphenylamine, 2, 6-di-tert-butyl and benzotriazole.
The first composite regulator has excellent dispersing, thickening and friction-reducing and wear-resisting properties after being proportioned; the second composite regulator has the functions of oxidation resistance, smoothness and corrosion resistance after being proportioned.
Preferably, the ultrasonic vibration treatment frequency in the step (2) is 1 to 1.5X 104Hertz, vibration time of 30-55 min.
Preferably, the ultrasonic vibration treatment frequency in the step (4) is 2 to 3.5X 104Hertz, vibration time of 15-20 min.
Detailed Description
The soybean adhesive comprises the following formula I: the composite material comprises the following raw materials in parts by mass:
100 parts of water;
15 parts of soybean protein powder;
3 parts of alkali;
0.5 part of silicate;
0.2 part of modifier urea;
0.3 part of curing agent polyamide polyamine-epichlorohydrin;
0.1 part of acid;
0.1 part of diphenylmethane diisocyanate;
0.5 part of vinyl acetate resin;
0.1 part of pyrethroid insecticide;
10 parts of a filler.
The filler comprises a first solid additive and a second solid additive,
the particle size range of the first solid additive is 0.8-5 microns, wherein the particles with the particle size of 0.8-1 micron account for 20% of the total weight of the solid additive, and the particles with the particle size of 1-2 microns account for 30% of the total weight of the solid additive; the balance of particles of 3-5 microns;
the second solid additive is a mixture of molybdenum disulfide nanospheres with the particle size of 10 nanometers and adjusting particles with the particle size of 6 micrometers according to the mass ratio of 1: 2.
And a second soybean adhesive formula: the composite material comprises the following raw materials in parts by mass:
100 parts of water;
40 parts of soybean protein powder;
8 parts of alkali;
3 parts of silicate;
5 parts of modifier urea;
2.5 parts of curing agent polyamide polyamine-epichlorohydrin;
0.1-4 parts of acid;
20 parts of diphenylmethane diisocyanate;
3 parts of vinyl acetate resin;
1.5 parts of pyrethroid insecticide;
1 part of filler.
The filler comprises a first solid additive and a second solid additive,
the particle size range of the first solid additive is 0.8-5 microns, wherein the particles of 0.8-1 micron account for 40% of the total weight of the solid additive, and the particles of 1-2 microns account for 10% of the total weight of the solid additive; the balance of particles of 3-5 microns;
the second solid additive is a mixture of molybdenum disulfide nanospheres with the particle size of 20 nanometers and adjusting particles with the particle size of 9 micrometers according to the mass ratio of 1: 5.
And the third formula of the soybean adhesive is as follows: the composite material comprises the following raw materials in parts by mass:
100 parts of water;
20 parts of soybean protein powder;
5 parts of alkali;
2 parts of silicate;
1.5 parts of modifier urea;
1.5 parts of curing agent polyamide polyamine-epichlorohydrin;
2 parts of acid;
10 parts of diphenylmethane diisocyanate;
2 parts of vinyl acetate resin;
1 part of pyrethroid insecticide;
and 8 parts of a filler.
The filler comprises a first solid additive and a second solid additive,
the particle size range of the first solid additive is 0.8-5 microns, wherein the particles with the particle size of 0.8-1 micron account for 30% of the total weight of the solid additive, and the particles with the particle size of 1-2 microns account for 25% of the total weight of the solid additive; the balance of particles of 3-5 microns;
the second solid additive is a mixture of molybdenum disulfide nanospheres with the particle size of 12 nanometers and adjusting particles with the particle size of 7 micrometers according to the mass ratio of 1: 3.
Ternary compound solution formula I
The biomass nanofiber solubilizer comprises the following components in parts by mass: 25: 300 are compounded;
the biomass nano-fiber solubilizer is prepared by adding 1 part of bamboo leaf flavone, 0.5 part of β -cyclodextrin peppermint oil micro powder, 3 parts of nano-particle-size silicon dioxide and 5 parts of aluminum hydroxide into cellulose colloidal suspension consisting of 4 parts of cellulase and 150 parts of microcrystalline cellulose according to parts by weight, then adding 0.5 part of 3-chloro-hydroxypropyl triethyl ammonium chloride, and stirring and reacting at 60 ℃ for 18 min.
the preparation method of β -cyclodextrin oleum Menthae Dementholatum micropowder comprises mixing β -cyclodextrin and oleum Menthae Dementholatum at 20 deg.C according to the mass ratio of 8: 65, and embedding oleum Menthae Dementholatum in β -cyclodextrin inner cavity in form of molecule to form β -cyclodextrin oleum Menthae Dementholatum micropowder in form of clathrate;
the extraction method of the bamboo leaf flavone comprises the following steps: selecting dry leaves of lower part of bamboo of more than six years old in Dryokohama delavayi, and pulverizing into 0.5mm folium Bambusae fine powder; dissolving with 75wt% methanol solution, performing ultrasonic treatment for 28min, dissolving with 75wt% methanol solution, filtering, and collecting filtrate as liquid to be separated for column chromatography.
Ternary compound solution formula II
The biomass nanofiber solubilizer comprises the following components in parts by mass: 40: 100 are compounded;
the biomass nano-fiber solubilizer is prepared by adding 1 part of bamboo leaf flavone, 0.5 part of β -cyclodextrin peppermint oil micro powder, 6 parts of silicon dioxide with nano particle size and 2 parts of aluminum hydroxide into cellulose colloidal suspension consisting of 7 parts of cellulose and 80 parts of microcrystalline cellulose according to parts by weight, then adding 1.8 parts of 3-chloro-hydroxypropyl triethyl ammonium chloride, and stirring and reacting at 80 ℃ for 30 min.
the preparation method of β -cyclodextrin oleum Menthae Dementholatum micropowder comprises mixing β -cyclodextrin and oleum Menthae Dementholatum at 30 deg.C according to mass ratio of 15: 40, and embedding oleum Menthae Dementholatum in β -cyclodextrin inner cavity in form of molecule to form β -cyclodextrin oleum Menthae Dementholatum micropowder in form of clathrate;
the extraction method of the bamboo leaf flavone comprises the following steps: selecting dry leaves of lower part of bamboo of more than six years old in Dryokohama delavayi, and pulverizing into 0.8mm folium Bambusae fine powder; dissolving with 85wt% methanol solution, performing ultrasonic treatment for 35min, dissolving with 85wt% methanol solution, filtering, and collecting filtrate as liquid to be separated for column chromatography.
Ternary compound solution formula III
The biomass nanofiber solubilizer comprises the following components in parts by mass: 30: 200 are compounded;
the biomass nano-fiber solubilizer is prepared by adding 2 parts by weight of bamboo leaf flavone, 0.6 part by weight of β -cyclodextrin peppermint oil micro powder, 5 parts by weight of nano-particle-size silicon dioxide and 3 parts by weight of aluminum hydroxide into cellulose colloidal suspension consisting of 6 parts by weight of cellulase and 120 parts by weight of microcrystalline cellulose, then adding 0.9 part by weight of 3-chloro-hydroxypropyl triethyl ammonium chloride, and stirring and reacting at 70 ℃ for 25 min.
the preparation method of β -cyclodextrin oleum Menthae Dementholatum micropowder comprises mixing β -cyclodextrin and oleum Menthae Dementholatum at 25 deg.C according to mass ratio of 12: 55, and embedding oleum Menthae Dementholatum in β -cyclodextrin inner cavity in form of molecule to form β -cyclodextrin oleum Menthae Dementholatum micropowder in form of clathrate;
the extraction method of the bamboo leaf flavone comprises the following steps: selecting dry leaves of lower part of bamboo of more than six years old in Dryokohama delavayi, and pulverizing into 0.6mm folium Bambusae fine powder; dissolving with 80wt% methanol solution, performing ultrasonic treatment for 30min, dissolving with 80wt% methanol solution, filtering, and collecting filtrate as liquid to be separated for column chromatography.
The first preparation method of the modified MUF adhesive comprises the following steps:
A. weighing 100 parts by weight of formaldehyde aqueous solution with mass concentration of 36.5wt%, 0.1 part by weight of alkaline substance solution with mass concentration of 30wt% and 0.3 part by weight of amino-terminated hyperbranched polymer PAMAM, putting into a reaction kettle, and starting stirring; the alkaline substance is sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide or ammonia water;
B. adding 1 part of hexachlorocyclotriphosphazene, heating to 50 ℃, adding 35 parts of melamine when the temperature is automatically raised to 75 ℃, continuously heating to 90 ℃, and reacting to obtain a primary polycondensate;
C. adding 40 parts of melamine into the primary polycondensate, and adding 0.6 part of p-toluenesulfonamide to obtain a second polycondensate;
D. and (3) cooling the second condensation polymer to 70 ℃, adding 20 parts of urea, continuing to react for 8min, and discharging the glue when the temperature is reduced to 30 ℃.
The second preparation method of the modified MUF adhesive comprises the following steps:
A. weighing 100 parts by weight of formaldehyde aqueous solution with the mass concentration of 37.4wt%, 0.5 part by weight of alkaline substance solution with the mass concentration of 50wt% and 0.6 part by weight of amino-terminated hyperbranched polymer PAMAM, putting into a reaction kettle, and starting stirring; the alkaline substance is sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide or ammonia water;
B. adding 1 part of hexachlorocyclotriphosphazene, heating to 55 ℃, adding 55 parts of melamine when the temperature is automatically raised to 85 ℃, and continuously heating to 95 ℃ for reaction to obtain a primary polycondensate;
C. adding 45 parts of melamine into the primary polycondensate, and adding 0.9 part of p-toluenesulfonamide to obtain a second polycondensate;
D. and (3) cooling the second condensation polymer to 75 ℃, adding 30 parts of urea, continuing to react for 12min, and discharging the glue when the temperature is reduced to 50 ℃.
The third preparation method of the modified MUF adhesive comprises the following steps:
A. weighing 100 parts by weight of formaldehyde aqueous solution with mass concentration of 36.9wt%, 0.4 part by weight of alkaline substance solution with mass concentration of 40wt% and 0.5 part by weight of amino-terminated hyperbranched polymer PAMAM, putting into a reaction kettle, and starting stirring; the alkaline substance is sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide or ammonia water;
B. adding 3 parts of hexachlorocyclotriphosphazene, heating to 53 ℃, adding 45 parts of melamine when the temperature is automatically raised to 80 ℃, and continuously heating to 92 ℃ for reaction to obtain a primary polycondensate;
C. adding 43 parts of melamine to the primary polycondensate, and adding 0.8 part of p-toluenesulfonamide to obtain a second polycondensate;
D. and (3) cooling the second polycondensate to 72 ℃, adding 20-30 parts of urea, continuing to react for 9min, and discharging the glue when the temperature is reduced to 40 ℃.
The preparation method IV of the modified MUF adhesive is the same as the preparation method I, except that after the adhesive is obtained in the step D, 5 parts of formaldehyde catching agent and 1 part of curing agent are added into the modified MUF adhesive in the using process;
the preparation method of the formaldehyde scavenger comprises the following steps: crushing 10 parts of urea, adding 5 parts of melamine, 8 parts of p-toluenesulfonic acid dihydrazide, 6 parts of amine sulfonate and 1 part of nano silicon dioxide, and fully and uniformly stirring;
the preparation method of the curing agent comprises the following steps: adding 100 parts of water into a reaction kettle, starting stirring, heating to 40 ℃, adding 20 parts of aluminum sulfate and 15 parts of p-toluenesulfonic acid, completely dissolving, cooling to room temperature, and discharging.
The preparation method of the modified MUF adhesive further comprises the steps of sequentially adding 6 parts of the first composite regulator and 11 parts of the second composite regulator after adding the formaldehyde catching agent;
the first composite regulator is prepared by mixing the following components in a mass ratio of 1: 3: 2, trioctylmethylammonium bromide, glycerol and polytetrafluoroethylene in proportion;
the first composite regulator is prepared by mixing the following components in a mass ratio of 1: 2: 3 portions of diphenylamine, 2, 6-di-tert-butyl and benzotriazole.
The fifth preparation method of the modified MUF adhesive is the same as the second preparation method, except that after the adhesive is obtained in the step D, 5 parts of formaldehyde capture agent and 3 parts of curing agent are added into the modified MUF adhesive in the using process;
the preparation method of the formaldehyde scavenger comprises the following steps: crushing 20 parts of urea, adding 10 parts of melamine, 12 parts of p-toluenesulfonic acid dihydrazide, 7 parts of amine sulfonate and 2 parts of nano silicon dioxide, and fully and uniformly stirring;
the preparation method of the curing agent comprises the following steps: adding 100 parts of water into a reaction kettle, starting stirring, heating to 50 ℃, adding 30 parts of aluminum sulfate and 10 parts of p-toluenesulfonic acid, completely dissolving, cooling to room temperature, and discharging.
The preparation method of the modified MUF adhesive further comprises the steps of sequentially adding 9 parts of the first compound regulator and 11 parts of the second compound regulator after adding the formaldehyde catching agent;
the first composite regulator is prepared by mixing the following components in a mass ratio of 1: 4: 1 proportion of trioctylmethylammonium bromide, glycerol and polytetrafluoroethylene;
the first composite regulator is prepared by mixing the following components in a mass ratio of 1: 4: 1 proportion of diphenylamine, 2, 6-di-tert-butyl and benzotriazole.
The fifth preparation method of the modified MUF adhesive is the same as the third preparation method, except that 6 parts of formaldehyde capture agent and 2 parts of curing agent are added into the modified MUF adhesive in the using process after the adhesive is obtained in the step D;
the preparation method of the formaldehyde scavenger comprises the following steps: crushing 15 parts of urea, adding 8 parts of melamine, 11 parts of p-toluenesulfonic acid dihydrazide, 6.5 parts of amine sulfonate and 1.2 parts of nano silicon dioxide, and fully and uniformly stirring;
the preparation method of the curing agent comprises the following steps: adding 100 parts of water into a reaction kettle, starting stirring, heating to 45 ℃, adding 25 parts of aluminum sulfate and 12 parts of p-toluenesulfonic acid, completely dissolving, cooling to room temperature, and discharging.
The preparation method of the modified MUF adhesive further comprises the steps of sequentially adding 8 parts of the first compound regulator and 7 parts of the second compound regulator after adding the formaldehyde catching agent;
the first composite regulator is prepared by mixing the following components in a mass ratio of 1: 3.4: 1.2, trioctylmethylammonium bromide, glycerol and polytetrafluoroethylene;
the first composite regulator is prepared by mixing the following components in a mass ratio of 1: 2.4: 1.3 of diphenylamine, 2, 6-di-tert-butyl and benzotriazole.
Example one
The oriented strand board comprises four oriented paving shaving layers of a core layer and veneer layers which are respectively pressed and glued on the upper surface and the lower surface of the four oriented paving shaving layers of the core layer;
the decorative layer is decorative paper, and a balance layer is directly pressed and adhered between the directional four layers of the core layer, the paving shaving layer and the decorative layer;
the decorative paper is impregnated with melamine formaldehyde resin or melamine modified urea resin and decorative paper added with formaldehyde decomposition glue solution; and soybean adhesive enhancement layers are respectively arranged among the directional four-layer paving shaving layer of the core layer, the balance layer and the veneer layer.
Example two
The oriented strand board comprises four oriented paving shaving layers of a core layer and veneer layers which are respectively pressed and glued on the upper surface and the lower surface of the four oriented paving shaving layers of the core layer;
the decorative layer is decorative paper, and a balance layer is directly pressed and adhered between the directional four layers of the core layer, the paving shaving layer and the decorative layer;
the decorative paper is impregnated with melamine formaldehyde resin or melamine modified urea resin and decorative paper added with formaldehyde decomposition glue solution; and soybean adhesive enhancement layers are respectively arranged among the directional four-layer paving shaving layer of the core layer, the balance layer and the veneer layer.
EXAMPLE III
The oriented strand board comprises four oriented paving shaving layers of a core layer and veneer layers which are respectively pressed and glued on the upper surface and the lower surface of the four oriented paving shaving layers of the core layer;
the decorative layer is decorative paper, and a balance layer is directly pressed and adhered between the directional four layers of the core layer, the paving shaving layer and the decorative layer;
the decorative paper is impregnated with melamine formaldehyde resin or melamine modified urea resin and decorative paper added with formaldehyde decomposition glue solution; and soybean adhesive enhancement layers are respectively arranged among the directional four-layer paving shaving layer of the core layer, the balance layer and the veneer layer.
Example four
The difference is that the decorative surface layer is made of technical wood veneer, and the technical wood veneer is made of functional technical battens which are sliced into the technical wood veneer with the required thickness; and a soybean adhesive enhancement layer is arranged between the core layer directional four-layer paving shaving layer and the veneer layer.
The preparation method of the functional technical wood comprises the following steps:
(1) a blank single plate is manufactured by rotary cutting or slicing, and the blank single plate is cut into a required size to obtain a single plate A;
(2) carrying out soaking, toughening and flame-retardant dyeing treatment on the veneer A in a ternary compound solution consisting of a biomass nano-cellulose solubilizer, a flame retardant and an acid dye to obtain a veneer B; wherein, the soaking, toughening, flame retarding and dyeing treatment comprises heating treatment at the temperature of 80 ℃; wherein, the ternary complex solution is formulated and prepared according to a first formulation of the ternary complex solution;
wherein the acid dye is a bisazo compound:
m1, M2 are independently from each other hydrogen or an alkali metal;
R1is hydrogen, C1-C4Alkyl or halogen;
R2is hydrogen;
x is halogen;
y is-CH = CH2；
(3) Adding formaldehyde decomposition powder into the modified MUF adhesive, uniformly stirring, and performing adhesive distribution on the veneer B to obtain a veneer C;
the formaldehyde decomposition powder comprises chitin and a nano silicon wafer;
(4) and (5) assembling the C veneer, performing cold pressing treatment to obtain a D batten, and sawing into required patterns and sizes to obtain a finished product.
EXAMPLE five
The fourth embodiment is the same as the fourth embodiment, except that the soaking, toughening, flame retarding and dyeing treatment comprises heating treatment at the temperature of 88 ℃; the formaldehyde decomposition powder in the step (3) comprises chitin, nano silicon wafers and tourmaline powder; the tourmaline powder accounts for 2wt% of the mass of the formaldehyde decomposition powder.
EXAMPLE six
The fifth embodiment is the same as the fifth embodiment, except that the soaking, toughening, flame retarding and dyeing treatment comprises heating treatment at the temperature of 95 ℃; the formaldehyde decomposition powder in the step (3) comprises chitin, nano silicon wafers and tourmaline powder; the tourmaline powder accounts for 5wt% of the mass of the formaldehyde decomposition powder.
EXAMPLE six
The same as the fifth embodiment except that the blank single plate is made by rotary cutting or slicing in the step (1), and the blank single plate is cut into the required size and then is subjected to carbonization heat treatment at different carbonization temperatures to obtain the single plate A.
The carbonization heat treatment comprises the steps of putting the veneer into wood carbonization equipment, rapidly heating and humidifying, raising the temperature to 80 ℃, humidifying to 70% relative humidity, keeping for 2h, then heating to 125 ℃ at the speed of 30 ℃/h by adopting a step-type heating method, keeping for 2h, then heating to 175 ℃ at the temperature by adopting a step-type heating method, keeping for 2h at the highest temperature, stopping heating and spraying atomized water to finish carbonization when the temperature of the wood is rapidly reduced to be below 80 ℃ in the carbonization equipment by adopting a spray atomized water method after the temperature is finished, and immediately taking the wood out of a kiln when the temperature is naturally reduced to 40 ℃.
Before the step (2), carrying out bleaching treatment on the veneer A;
the bleaching treatment comprises the following steps:
firstly, pretreatment, namely placing the wood veneer in a sodium hydroxide solution with the pH value of 9 for 1h to prepare a pretreated veneer;
alkaline decoloring:
preparing a solution A: the solution A is a mixed solution containing the following substances by mass concentration: 4% of hydrogen peroxide, 0.2% of sodium silicate, 0.05% of ethylene diamine tetraacetic acid, 0.05% of sodium sulfate, 0.05% of magnesium sulfate, 0.5% of sodium hydroxide, 0.8% of ammonia water and water as a solvent;
pouring the solution A into water with the temperature of 55 ℃, and adjusting the pH value to 9 by using sodium hydroxide to prepare a solution A clinical solution; placing the pretreated veneer in the solution A for decolorizing treatment, slowly heating to 80 ℃ at a heating rate of 5 ℃/h during treatment, and treating for 2h to obtain an alkaline decolorizing treated veneer;
acid decoloring:
preparing a solution B: the solution B is a mixed solution containing the following substances by mass: 1% of sodium chlorate, 0.02% of sulfamic acid, 0.5% of oxalic acid, 0.1% of acetic acid, 1% of phosphoric acid and water as a solvent;
pouring the solution B into water of 45 ℃, and adjusting the pH value to 4 by using phosphoric acid to prepare a solution B clinical solution; taking the alkaline decolorizing treated veneer out of the solution A, washing with water, and placing in the solution B for decolorizing treatment for 2h to obtain acidic decolorizing treated veneer;
and fourthly, cleaning and drying, namely taking the acid decoloration treated veneer out of the temporary solution of the solution B, soaking the veneer in clear water for 1 hour, and then drying.
When the soaking toughening flame-retardant dyeing treatment in the step (2) is carried out, the ultrasonic vibration treatment is also carried out, and the frequency of the ultrasonic vibration treatment is 1 multiplied by 104Hertz, vibration time 30 min.
EXAMPLE seven
The difference from the sixth embodiment is that the blank single plate is made by rotary cutting or slicing in the step (1), and after the blank single plate is cut into the required size, the carbonization heat treatment with different carbonization temperatures is carried out to obtain the single plate A.
The carbonization heat treatment comprises the steps of putting the veneer into wood carbonization equipment, rapidly heating and humidifying, raising the temperature to 90 ℃, humidifying the humidity to 80% relative humidity, keeping for 4h, then heating to 135 ℃ at the speed of 40 ℃/h by adopting a step-type heating method, keeping for 4h, then heating to 200 ℃ at the temperature of 18 ℃/h by adopting a step-type heating method, keeping for 2 h-4 h at the highest temperature, stopping heating and spraying atomized water for final carbonization when the temperature of the wood is rapidly reduced to below 80 ℃ in the carbonization equipment by adopting a water spraying method after the temperature is up, and immediately taking the wood out of the kiln when the temperature is naturally reduced to 60 ℃.
Before the step (2), carrying out bleaching treatment on the veneer A;
the bleaching treatment comprises the following steps:
firstly, pretreatment, namely placing the wood veneer in a sodium hydroxide solution with the pH value of 11 for 1-3 hours to prepare a pretreated veneer;
alkaline decoloring:
preparing a solution A: the solution A is a mixed solution containing the following substances by mass concentration: 7% of hydrogen peroxide, 0.8% of sodium silicate, 0.1% of ethylene diamine tetraacetic acid, 0.15% of sodium sulfate, 0.1% of magnesium sulfate, 1% of sodium hydroxide, 0.4% of ammonia water and water as a solvent;
pouring the solution A into 65 ℃ water, and adjusting the pH value to 11 by using sodium hydroxide to prepare a solution A clinical solution; placing the pretreated veneer in the solution A for decolorizing treatment, slowly heating to 90 ℃ at a heating rate of 10 ℃/h during treatment, and treating for 4h to obtain an alkaline decolorizing treated veneer;
acid decoloring:
preparing a solution B: the solution B is a mixed solution containing the following substances by mass: 3% of sodium chlorate, 0.2% of sulfamic acid, 1.5% of oxalic acid, 0.5% of acetic acid, 0.3% of phosphoric acid and water as a solvent;
pouring the solution B into water of 55 ℃, and adjusting the pH value to 6 by using phosphoric acid to prepare a solution B clinical solution; taking the alkaline decolorizing treated veneer out of the solution A, washing with water, and placing in the solution B for decolorizing for 4h to obtain acidic decolorizing treated veneer;
and fourthly, cleaning and drying, namely taking the acid decoloration treated veneer out of the temporary solution of the solution B, putting the veneer into clean water for soaking for 2 hours, and then drying.
When the soaking toughening flame-retardant dyeing treatment in the step (2) is carried out, the ultrasonic vibration treatment is also carried out, and the frequency of the ultrasonic vibration treatment is 3.5 multiplied by 104Hertz, vibration time 120 min.
Example eight
The seventh embodiment is different from the seventh embodiment in that the blank single plate is made by rotary cutting or slicing in the step (1), and after the blank single plate is cut into a required size, carbonization heat treatment with different carbonization temperatures is carried out to obtain the single plate A.
The carbonization heat treatment comprises the steps of putting the veneer into wood carbonization equipment, rapidly heating and humidifying, raising the temperature to 85 ℃, humidifying to 75% relative humidity, keeping for 3h, then heating to 128 ℃ at the speed of 35 ℃/h by adopting a step-type heating method, keeping for 3h, then heating to the temperature of 16 ℃/h to 185 ℃ by adopting a step-type heating method, keeping for 3h at the highest temperature, rapidly cooling the wood to the temperature below 80 ℃ in the carbonization equipment by adopting a water spraying atomization method after the temperature is raised, stopping heating and atomizing water to finish carbonization, and immediately taking the wood out of a kiln when the temperature is naturally reduced to 50 ℃.
Before the step (2), carrying out bleaching treatment on the veneer A;
the bleaching treatment comprises the following steps:
firstly, pretreatment, namely placing the wood veneer in a sodium hydroxide solution with the pH value of 10 for 2 hours to prepare a pretreated veneer;
alkaline decoloring:
preparing a solution A: the solution A is a mixed solution containing the following substances by mass concentration: 5% of hydrogen peroxide, 0.6% of sodium silicate, 0.08% of ethylene diamine tetraacetic acid, 0.08% of sodium sulfate, 0.07% of magnesium sulfate, 0.5-1% of sodium hydroxide, 0.6% of ammonia water and water as a solvent;
pouring the solution A into water of 60 ℃, and adjusting the pH value to 10 by using sodium hydroxide to prepare a solution A clinical solution; placing the pretreated veneer in the solution A for decolorizing treatment, slowly heating to 85 ℃ at a heating rate of 8 ℃/h during treatment, and treating for 3h to obtain an alkaline decolorizing treated veneer;
acid decoloring:
preparing a solution B: the solution B is a mixed solution containing the following substances by mass: 2% of sodium chlorate, 0.12% of sulfamic acid, 0.8% of oxalic acid, 0.4% of acetic acid, 0.6% of phosphoric acid and water as a solvent;
pouring the solution B into water of 49 ℃, and adjusting the pH value to 5 by using phosphoric acid to prepare a solution B clinical solution; taking the alkaline decolorizing treated veneer out of the solution A, washing with water, and placing in the solution B for decolorizing treatment for 3h to obtain acidic decolorizing treated veneer;
and fourthly, cleaning and drying, namely taking the acid decoloration treated veneer out of the temporary solution of the solution B, putting the veneer into clean water for soaking for 1.2h, and then drying.
When the soaking toughening flame-retardant dyeing treatment in the step (2) is carried out, the ultrasonic vibration treatment is also carried out, and the frequency of the ultrasonic vibration treatment is 2.5 multiplied by 104Hertz, vibration time of 90 min.
The formaldehyde release limit of the finally prepared functional type technical wood is less than 0.2mg/L, and the formaldehyde release limit reaches the four-star standard of Japan F; the antibacterial rate is more than or equal to 90 percent; the surface wear resistance is less than or equal to 0.08g/100 r; the surface wear resistance meets the standard GB/T18103-2013. The formaldehyde purification efficiency of the prepared technical wood reaches over 75 percent, and the durability of the formaldehyde purification effect is more than 60 percent.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (1)
1. An oriented strand board, characterized in that: the decorative floor comprises four directional paving shaving layers of a core layer and decorative layers which are respectively pressed and glued on the upper surface and the lower surface of the four directional paving shaving layers of the core layer;
the veneer layer is made of scientific wood veneer;
wherein the scientific wood veneer is a scientific wood veneer with required thickness formed by slicing functional scientific battens; the preparation method of the functional type scientific and technological flitch comprises the following steps:
(1) a blank single plate is manufactured by rotary cutting or slicing, and the blank single plate is cut into a required size to obtain a single plate A;
(2) carrying out soaking, toughening and flame-retardant dyeing treatment on the veneer A in ternary compound dye consisting of a biomass nanocellulose solubilizer, a flame retardant and an acid dye to obtain a veneer B;
(3) adding formaldehyde decomposition powder into the modified MUF adhesive, uniformly stirring, and performing adhesive distribution on the veneer B to obtain a veneer C;
(4) assembling the C single board, performing cold pressing treatment to obtain a D batten, and sawing the D batten into required patterns and sizes to obtain a finished product;
the acid dye is a bisazo compound:
，
wherein,
m1, M2 are independently from each other hydrogen or an alkali metal;
R1is hydrogen, C1-C4Alkyl or halogen;
R2is hydrogen;
x is halogen;
y is-CH = CH2
The preparation method of the modified MUF adhesive in the step (3) comprises the following steps:
A. weighing 100 parts by weight of formaldehyde aqueous solution with mass concentration of 36.5-37.4wt%, 0.1-0.5 part by weight of alkaline substance solution with mass concentration of 30-50wt% and 0.3-0.6 part by weight of amino-terminated hyperbranched polymer PAMAM, putting into a reaction kettle, and starting stirring;
B. adding 1-4 parts by weight of hexachlorocyclotriphosphazene, heating to 50-55 ℃, adding 35-55 parts of melamine when automatically heating to 75-85 ℃, and continuously heating to 90-95 ℃ for reaction to obtain a primary polycondensate;
C. adding 40-45 parts of melamine into the primary polycondensate, and adding 0.6-0.9 part of p-toluenesulfonamide to obtain a second polycondensate;
D. cooling the second polycondensate to 70-75 ℃, adding 20-30 parts of urea, continuing to react for 8-12min, and discharging the glue when the temperature is reduced to 30-50 ℃;
after the adhesive is obtained in the step D, 5-10 parts of formaldehyde catching agent and 1-3 parts of curing agent are added into the modified MUF adhesive in the using process;
the preparation method of the modified MUF adhesive further comprises the steps of sequentially adding 6-9 parts of a first compound regulator and 7-11 parts of a second compound regulator after adding the formaldehyde catching agent;
the first composite regulator is prepared by mixing the following components in a mass ratio of 1: 3-4: 1-2 parts of trioctyl methyl ammonium bromide, glycerol and polytetrafluoroethylene;
the formaldehyde decomposition powder in the step (3) comprises chitin, a nano silicon wafer and tourmaline powder; the tourmaline powder accounts for 0-5wt% of the mass of the formaldehyde decomposition powder;
the ternary compound dye in the step (2) is prepared from a biomass nano cellulose solubilizer, a flame retardant and an acidic disazo dye compound solution according to a mass ratio of 1: 25-40: 100-300 are compounded;
the biomass nano cellulose solubilizer is prepared by adding 1-3 parts by weight of bamboo leaf flavone, 0.5-0.8 part by weight of β -cyclodextrin peppermint oil micro powder and 3-6 parts by weight of nano-particle-size silicon dioxide and/or 2-5 parts by weight of aluminum hydroxide into cellulose colloidal suspension consisting of 4-7 parts by weight of cellulase and 80-150 parts by weight of microcrystalline cellulose, then adding 0.5-1.8 parts by weight of 3-chloro-hydroxypropyl triethyl ammonium chloride, and stirring and reacting at 60-80 ℃ for 18-30 min;
a flexible reinforcing material layer is arranged between the core layer directional four-layer paving shaving layer and the veneer layer; the thickness of the flexible reinforced material layer is 0.05-0.15 mm; the flexible reinforcing material is non-woven fabric or kraft paper;
the preparation method of the curing agent comprises the following steps: adding 100 parts of water into a reaction kettle, starting stirring, heating to 40-50 ℃, adding 20-30 parts of aluminum sulfate and 10-15 parts of p-toluenesulfonic acid, completely dissolving, cooling to room temperature, and discharging.
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| CN110358497B (en) * | 2019-07-09 | 2020-10-16 | 陕西科技大学 | Hyperbranched modified gelatin adhesive for shoes or bags and preparation method thereof |
| CN113815082B (en) * | 2021-08-27 | 2022-11-01 | 大亚人造板集团有限公司 | Production process of formaldehyde-free flame-retardant fiberboard |
| CN114263283A (en) * | 2021-12-30 | 2022-04-01 | 德华兔宝宝装饰新材股份有限公司 | Heating heat-insulating energy-saving wallboard and manufacturing method thereof |
| CN115198557B (en) * | 2022-06-17 | 2023-10-10 | 成都板先森装饰材料有限公司 | Antibacterial formaldehyde-reducing melamine veneer and preparation method thereof |
| CN115742483A (en) * | 2022-12-19 | 2023-03-07 | 山东雅满家生物质科技有限公司 | Composite floor and production method thereof |
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