CN110202649A - A kind of bamboo and timber material method of modifying and a kind of bamboo and wood lumber - Google Patents
A kind of bamboo and timber material method of modifying and a kind of bamboo and wood lumber Download PDFInfo
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- CN110202649A CN110202649A CN201910460325.0A CN201910460325A CN110202649A CN 110202649 A CN110202649 A CN 110202649A CN 201910460325 A CN201910460325 A CN 201910460325A CN 110202649 A CN110202649 A CN 110202649A
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- 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
-
- 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
- B27K5/0015—Treating of wood not provided for in groups B27K1/00, B27K3/00 by electric means
- B27K5/002—Electric discharges, plasma
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/10—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of wood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/14—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood board or veneer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0008—Electrical discharge treatment, e.g. corona, plasma treatment; wave energy or particle radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/164—Drying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/02—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B9/041—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
-
- 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
- B27K2240/20—Removing fungi, molds or insects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
- B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
Abstract
The present invention discloses a kind of bamboo and timber material method of modifying and a kind of bamboo and wood lumber, belongs to bamboo and timber material field.A kind of bamboo and timber material method of modifying, under 20KV~60KV high voltage electrostatic field, the bamboo and wood lumber ontology for being fitted with silver plate to upper/lower terminal face carries out high-pressure electrostatic processing.Plate by modification of the present invention successively includes nano-silver element permeable formation, bamboo and wood lumber ontology and nano-silver element sedimentary/nano-silver element permeable formation along plate thickness direction.The present invention utilizes the bamboo and timber material of high-pressure electrostatic modification, and there is deeper anticorrosive mildewproof to handle depth, and penetration depth of the nano-silver element inside plate is 0.05mm~1mm, and modified bamboo and timber material anticorrosive mildewproof effect is more stable.
Description
Technical field
The invention belongs to bamboo and timber material fields, and in particular, to a kind of bamboo and timber material method of modifying and a kind of bamboo and wood
Lumber.
Background technique
Timber and bamboo wood are all the natural macromolecular materials of function admirable, have just obtained making extensively for the mankind since ancient times
With.In today of scientific and technical high development, although many new materials emerge one after another, timber and bamboo wood are with its natural material institute
Distinctive advantage and natural, beautiful texture still play an important role in people's lives.However as biological material
Material, timber and bamboo wood have the defects that its is natural, easily limit it by biological attacks, these deficiencies such as bacterium, worm, the raw drilling worms in sea
Application.Anti-corrosion is the important measures of prolonging wood and bamboo wood service life, is had great importance.It is right from macroscopically saying
Timber and bamboo wood, which carry out preservative treatment, can reduce economic activity and people's lives to the quantity required of timber and bamboo wood, reduce gloomy
Woods cutting capacity, protects forest resources, and has ecological benefits；From microcosmic, carrying out anti-corrosion to timber and bamboo wood can be improved wood
Matter product resists rotten, insect pest performance, extends its service life, caused by reducing timber and bamboo wood due to drop etc., degrading, is discarded
Waste has economic benefit.Rot fungi, which ruins wood bamboo material, must have the elements such as nutriment, moisture, temperature, humidity and air, this
Several indispensable, and otherwise the growth and development of rot fungi would not be suppressed, or dead.As long as therefore controlling this several
The factor can be effectively protected wood bamboo material.Wood bamboo material anti-corrosion can be divided into physical method and two kinds of chemical method at present.
Physical method: being that the surface protection of bamboo and wood material exposure is prevented bamboo and wood material to bamboo and wood material paint or coating
It is directly contacted with outside environmental elements, to prevent the erosion of microorganism.By taking bamboo wood as an example, bamboo wood corrosion-resistant physical method includes: (1)
Water logging, soaked time are generally 4~12 weeks.When fresh bamboo wood ducks in drink, most bamboo liquid is leached；(2) it toasts, benefit
It is baked and banked up with earth with the oil firing on new fresh bamboo tube surface, so that exocuticle is rapidly dry and part is caused to carbonize and starch and other
The decomposition of carbohydrate, while bamboo aligning can be carried out, but excessive heating or drying can cause serious collapse；(3) sootiness is used
Flue gas, which fire-cures bamboo wood, can cover one layer of carbonaceous protective film on its surface to separate air, while can reduce the aqueous of bamboo wood
Rate；(4) high temperature drying carries out high temperature drying to bamboo cane, can not only go to kill bacterium, the worm for coming into bamboo wood, but also can reduce
The moisture content of bamboo wood；(5) it brushes, with coating such as lime, tar in bamboo material surface to separate air.The processing cost of physical method compared with
It is low, easy to operate, general no pollution to the environment, but not lasting protectiveness, once processing material is further processed or occurs
Abrasion and cracking, and ambient enviroment is suitable for, then and rot fungi can also encroach on wood bamboo material once again, so physical method does not make individually generally
With.
China Patent Publication No.: CN108407018A, publication date: the patent document of 2018-08-17 discloses one kind to wood
The method of material progress preservative treatment: then it is aqueous to obtain timber for the natural moisture content of timber first under the conditions of test local climate
Rate is down to the primary drying temperature C1 and drying time T1 needed when 10%~14%, and moisture content drops at 65 DEG C~75 DEG C
Then the redrying time T2 needed when to 6%~8% carries out actual primary drying and redrying, after the completion of dry
Carry out primary and secondary carbonization treatment.The program has the advantages that construction technology is simple, and quality is easily controllable, construction
Process does not generate excess waste, non-environmental-pollution, and timber forms one of high density protective film after high temperature cabonization, prevents rainwater
Into wood internal, while timber hydroscopicity being reduced under high temperature action, being not easy affected by environment, wood surface is carbonized
After processing, has the characteristics that anti-corrosion, mothproof, in conjunction with the protective layer of spraying different characteristics, while processing method is simple and quick, quality
Easy to detect, short construction period, while improving the preservation of timber against decay, mothproof and humidity resistance, reach waterproof, wear-resisting, high temperature resistant,
The advantages that anti acid alkali performance.There are still following shortcomings for the invention: 1) affecting the original form of wood surface；2) to timber into
Row surface carbonation causes the mechanical property of timber to reduce；3) invention does not refer to treating of wood depth, processing surface mill
Damage or cracking, rot fungi can also encroach on timber once again.
Chemical method: it is mainly handled, is impregnated with chemical agent or brushing wood bamboo material with preservative, this is most common
Wood bamboo material anti-corrosion method namely usually said wood bamboo material preservative treatment.Preservative can hinder the analytic metabolism of fungi, such as
DNA (DNA), RNA (ribonucleic acid), protein, lipoid, the synthesis of cell wall, mitosis etc..Different anti-corrosions
Agent has different performances, is respectively acting on the different parts of rot fungi, inhibits fungi growth and breeding to reach, even kills
The purpose of rot fungi, if CCA (copper chromium arsenic) can poison wood bamboo material component to break off the source of nutrition of fungi, quaternary amine can make
Fungi superficial lesions so as to cause cell inclusion leakage.The advantages of chemical preservation, is that favorable anti-corrosion effect, residual effect time are long, but
It is that preservative treatment is complicated for operation, processing cost is high, and preservative generally has adverse effect to human body and environment.How to improve
The performance of preservative improves durability, reduces the emphasis that toxicity is current wood bamboo material anti-corrosion research.
China Patent Publication No.: CN101229645A, publication date: the patent document of 2008-07-30 discloses a kind of bamboo and wood
Material Antisepticize and mildew preventive, it is mainly obtained by matrix addition zinc compound, copper-containing compound and cationic surfactant；It should
Invention compounds the biology (chemical type) of water-insoluble inorganic compound using bamboo vinegar, wood vinegar and careless vinegar liquid as main component
Timber preservative can also add the nitrogenous compound of ammonia, ammonium salt or amine to increase its dissolubility.The invention has the advantages that
Resistance leachability strong (turnover rate is less than 2%), hygroscopicity are low, and no frosting phenomenon, toxicity is low, anticorrosive mildewproof effect is good, can also use
It is handled in the discoloration of timber, bamboo wood.The invention is disadvantageous in that: 1) preservative treatment is complicated for operation, processing cost is high；2) prevent
Rotten agent has certain adverse effect to human body and environment；3) chemical agent does not generate new crosslinking with bamboo and timber material, prevents
Rotten anti-mold effect is unstable.
In addition, wood bamboo material is modified to be increasingly becoming a kind of new anti-corrosion means.The modification of wood bamboo material is by heat effect or change
Effect makes ingredient or structure in wood bamboo material change, and reduces the water imbibition of wood bamboo material, makes wood bamboo material internal environment no longer
It is suitble to rot fungi or the existence of worm ant.Wooden modifying processing is broadly divided into heat treatment and chemical modification handles two classes.Heat-treated wood
Dimensional stability and rotproofness improve, but mechanical property can generate a degree of reduction.At the chemical modification of wood bamboo material
Reason mainly includes acetylation process and resin treatment.Acetylation process is anti-with acetic anhydride and wood bamboo material under the action of catalyst
It answers, replaces carboxyl hydrophilic in wood bamboo material by hydrophobic acetyl group, and make wood bamboo material that there is the mothproof ability of antibacterial, and improve
Its dimensional stability.Resin treatment is to inject organic monomer inside wood bamboo material, handles or radiates by heat treatment, acid, makes list
Body forms insoluble high-molecular compound in wood bamboo material interior polymeric or with wood bamboo material graft copolymerization.It is handled by chemical modification
Afterwards, the dimensional stability and rotproofness of wood bamboo material improve, but compared with preservative treatment, price is higher, and anti-corrosion effect is also
Need to be investigated.
China Patent Publication No.: CN202509729U, publication date: the patent document of 2012-10-31 disclose it is a kind of silver from
Sub- antibacterial composite floor board, it is layer structure, is successively laminated by wearing layer, silver-ion antibiotic layer, decorative layer, substrate layer and balance
Pressurization system is combined, and silver-ion antibiotic layer is nano silver colloidal sol coat.The invention have to a certain extent it is mould proof, purification,
The functions such as self-cleaning, antibacterial can prevent the growth of bacterium in daily life, mould.But to reach the more of anti-mold effect progress
Layer combination process, increases cost of manufacture；Moreover, the anticorrosive mildewproof of the invention is ineffective, it is mainly reflected in: 1) invention
Practical silver-ion antibiotic layer is a kind of colloidal sol coat, and the processing mode of this antibacterial overlay film can not permeate in a natural environment
To certain depth inside plate, antibiotic layer is integrally destroyed once will lead to monolith plate if destruction, the effect of anticorrosive mildewproof compared with
Difference；2) silver ion can be reacted with-SH in the antibiotic layer of the invention, destroy the activity of intracellular synzyme, but still deposit in plate
It is to be processed in substances such as lignin, therefore the invention can not do thorough processing to plate inside, still remain plate rot it is mouldy
It may.
Summary of the invention
1, it to solve the problems, such as
For asking in existing bamboo and timber material modification treatment technology there are complicated for operation, anticorrosive mildewproof effect are unstable
Topic, the present invention provide a kind of bamboo and timber material method of modifying and a kind of bamboo and wood lumber.Modification processing method operation of the invention
Simplicity, and pass through the processed bamboo and timber material of method of modifying of the invention, anticorrosive mildewproof effect is more stable.
2, technical solution
A kind of bamboo and timber material method of modifying closes upper/lower terminal face paste under 20KV~60KV high voltage electrostatic field
There is the bamboo and wood lumber ontology of silver plate to carry out high-pressure electrostatic processing.
Preferably, method of modifying includes:
S1, dry bamboo and wood lumber ontology to be processed；
S2, the upper/lower terminal that two blocks of silver plates are individually positioned in the bamboo and wood lumber body thickness direction after drying
Face, and carry out hot-pressing processing；
In S3, two blocks of silver plates, one of silver plate connection HV generator, another piece of silver plate ground connection are described
HV generator voltage is 20KV~60KV；
S4, high-pressure electrostatic processing 2h~for 24 hours, complete the bamboo and wood lumber ontology modification.
Preferably, the silver plate for connecting HV generator is connected to the cathode of the HV generator.
Preferably, for bamboo and wood lumber ontology to be processed after step S1 is dry, whole moisture content is 8 ± 3%.
Preferably, the bamboo and wood lumber body surface after being dried to step S1 carries out sanding processing, and sanding amount is
0.3mm~0.5mm.
Preferably, in step S2, hot-pressing processing temperature is not higher than 150 DEG C, when hot pressing plate face pressure be 0.1MPa~
0.5MPa。
Preferably, by step S3 high-pressure electrostatic treated bamboo and wood lumber ontology, by two pieces of silver plate connection sides
Formula is exchanged, i.e., the silver plate being connected on HV generator originally is grounded, it is quiet that the silver plate being grounded originally is connected to high pressure
Electric generator continues high-pressure electrostatic processing.
Preferably, the thickness of the silver plate is not less than 0.5mm, and silver content is not less than 92.5%.
Preferably, the sectional dimension of the silver plate is not less than the sectional dimension of the bamboo and wood lumber ontology.
A kind of bamboo and wood lumber, the plate successively include nano-silver element permeable formation, bamboo and wood matter along plate thickness direction
Board body and nano-silver element sedimentary/nano-silver element permeable formation.
Preferably, nano-silver element includes one or more of nano silver, nano phase ag_2 o or nanometer silver peroxide group
It closes.
Preferably, the nano-silver element permeable formation the intrinsic penetration depth of bamboo and wood lumber be 0.05mm~
1mm。
Preferably, the nano-silver element sedimentary with a thickness of 0.01mm~0.05mm.
3, beneficial effect
Compared with the prior art, the invention has the benefit that
(1) a kind of bamboo and timber material method of modifying of the invention, using the high-pressure electrostatic field excitation silver plate of 20KV~60KV,
So that silver plate generates Silver nanoparticles, the Silver nanoparticles with antibacterial, bactericidal effect are attached to the bamboo and wood matter being bonded with silver plate
Board body surface, under the action of electric field force, Silver nanoparticles are permeated to bamboo and wood lumber body interior；Meanwhile in high pressure
Under the action of electrostatic field, the intrinsic lignin of bamboo and wood lumber forms the chemical group of fracture under the excitation of free electron
(- OH and-CHO) and new free electron, and penetrates into conjunction with the Silver nanoparticles inside plate and generates cross-linking reaction, this hair
Bright modification is easy to operation, and treated plate surface has nano-silver element deposition, it is internal also have it is higher
Modification depth, through detecting, maximum penetration depth of the nano-silver element in bamboo and timber material has reached 1mm, so even if
Bamboo and wood lumber surface abrasion can equally have preferable anticorrosive mildewproof performance, and anticorrosive mildewproof effect is more stable；
(2) in method of modifying of the invention, the silver plate of high-voltage electrostatic field is connected, is excited and generates Silver nanoparticles, these
Particle has outstanding resistance leachability；High-pressure electrostatic field voltage is lower than 20KV, and Silver nanoparticles osmotic effect is poor and these are received
Rice silver particles are unevenly distributed in plate surface, and the high-voltage electrostatic field of 20KV~60KV enables to the nanometer that silver plate is inspired
Silver particles are evenly distributed in bamboo and wood lumber body surface, and the modification face of bamboo and timber material more extensively, more evenly, significantly improves
The weatherability of bamboo and wood lumber；Meanwhile bamboo and wood lumber ontology of the invention is by the activation of high-voltage electrostatic field, so that bamboo and wood matter
The chemical bond number of the free electron and fracture of material surface and inside increases, the friendship between bamboo and wood lumber and Silver nanoparticles
Connection increases more chemical reaction sites, further reduces the loss of silver element, and the anti-corrosion for significantly improving bamboo and wood lumber is anti-
Mould effect；
(3) present invention method modified by high-voltage electrostatic field, solves bamboo material surface natural fat class and surface-active
The problems such as low, improves material surface activity by the further polarization material surface of high-pressure electrostatic, while having activated material and nanometer
The cross-linking reaction of silver particles；
(4) high-voltage electrostatic field method of modifying of the invention consumption power is small, and process cycle is short, and environment friendly and pollution-free, anti-corrosion is prevented
Mould effect is more stable.
Detailed description of the invention
Fig. 1 is the flow chart of method of modifying of the present invention；
Fig. 2 is the operation schematic diagram of 1- of embodiment of the present invention embodiment 24；
Fig. 3 is the operation schematic diagram of 25- of embodiment of the present invention embodiment 48；
Fig. 4 is the operation schematic diagram of the embodiment of the present invention 50.
In figure: 1, bamboo and wood lumber ontology；2, silver plate；3, nano-silver element permeable formation；4, nano-silver element sedimentary；5,
Direction of an electric field.
Specific embodiment
The present invention provides a kind of bamboo and timber material method of modifying, as shown in Figure 1, wherein bamboo and wood lumber includes bamboo plate
Material, wooden boards and bamboo composite wood board close upper/lower terminal face paste under 20KV~60KV high voltage electrostatic field
There is the bamboo and wood lumber ontology 1 of silver plate 2 to carry out high-pressure electrostatic processing.
By the silver plate 2 of 20KV~60KV high-pressure electrostatic field excitation, Silver nanoparticles can be generated, in antiseptic elements, by
Have the characteristics that broad-spectrum antiseptic, germicidal efficiency are high in silver element, be not likely to produce drug resistance, reaches antibacterial or bactericidal effect, nanometer
Silver particles are attached to 1 surface of bamboo and wood lumber ontology being bonded with silver plate 2.The Silver nanoparticles that high-pressure electrostatic is excited are in electric field
To plate internal penetration under the action of power, in process of osmosis, Silver nanoparticles are reacted with the oxygen in air can also generate nano oxygen
Change silver or nanometer silver peroxide, nano silver, nano phase ag_2 o or nanometer silver peroxide are referred to as nano-silver element, three kinds of valence states
Silver element has suction-operated to microorganism, and after microorganism is adsorbed by silver element, the enzyme for playing respiration just loses effect, micro-
Biology will be dead rapidly, meanwhile, the silver element of three kinds of valence states all has very strong redox ability, to generate outstanding
Bactericidal effect.These nano-silver elements of the invention test its particle size less than 100nm, research through X-ray diffractometer (XRD)
Prove that particle is less than 100nm and has outstanding resistance leachability, these nano-silver elements are under the action of electric field force, a part of to plate
Material internal penetration, a part of nano-silver element can also be deposited on 1 surface of bamboo and wood lumber ontology.
Meanwhile under the action of high-voltage electrostatic field, the excitation of lignin in bamboo and wood lumber ontology 1 in free electron
Under, form fracture chemical group (- OH and-CHO) and new free electron, be broken chemical group and new free electron can with sink
Product 1 surface of bamboo and wood lumber ontology nano-silver element combine, also can with penetrate into conjunction with the nano-silver element inside plate,
Form anticorrosive mildewproof crosslinking points.At the same time, nano-silver element of the invention can also react with-SH, anticorrosive mildewproof processing
More thoroughly.Anticorrosive mildewproof processing operation of the invention is simple and easy to do, and treated plate surface has nano-silver element deposition,
There is deeper anticorrosive mildewproof to handle depth for inside, even if 1 surface abrasion of bamboo and wood lumber ontology can equally have preferably
Anticorrosive mildewproof performance, anticorrosive mildewproof effect are more stable.
Method of modifying of the invention, according to the motion artifacts of charged particle, the equation of motion and bamboo and timber material in electric field
Penetration Signature, nano-silver element is significantly improved in the infiltration campaign of bamboo and timber material, so that it is anti-to improve bamboo and wood lumber
It is anti-to efficiently solve physical preservation so that whether surface or inside obtain preservative treatment to plate for rotten mould proof processing depth
The not high problem of weatherability in mould method.
Bamboo and wood lumber anticorrosive mildewproof processing step of the invention specifically includes:
S1, bamboo and wood lumber ontology 1 to be processed is put into drying box is dry, and drying temperature is 50 DEG C, drying time is
12h, so that the whole moisture content of bamboo and wood lumber ontology 1 to be processed is 8 ± 3%, this is because bamboo and wood material is higher in moisture content
In the case of, cause bamboo and wood material conductivity to increase, material surface parts can be caused to be carbonized under high-pressure electrostatic effect, reduce plate
Mechanical property.
S2, the upper/lower terminal face that two blocks of silver plates 2 are individually positioned in 1 thickness direction of bamboo and wood lumber ontology after drying,
And hot-pressing processing is carried out, hot-pressing processing includes temperature-pressure processing and room temperature pressurized treatments, and the effect of hot-pressing processing is mainly:
1) certain pressure is given, so that silver plate 2 and the fitting of bamboo and wood lumber ontology 1 are tighter, facilitates nano-silver element in bamboo and wood matter
The attachment and infiltration on 1 surface of board body；It is 2) faster than the reaction activation of bamboo and wood lumber ontology 1 of room temperature pressurization when heating pressurization,
Nano-silver element is more advantageous in conjunction with the chemical group in bamboo and wood lumber ontology 1.
In S3, two blocks of silver plates 2, one block of silver plate 2 connects HV generator, to guarantee higher operational safety, tool
Body, it is alternatively connected to high-pressure electrostatic and cathode occurs, another block of silver plate 2 connects ground wire, forms electrostatic field effect, high-pressure electrostatic hair
Raw device voltage is 20KV~60KV, so that nano-silver element has better osmotic effect, and is distributed more uniform.
It is noted that as shown in Fig. 2, cathode, the silver plate of downside occurs when the silver plate 2 of upside is connected to high-pressure electrostatic
2 ground connection, form electrostatic field from the bottom to top, the nano-silver element that the silver plate 2 of downside is excited is under electrostatic field, meeting at this time
To plate internal penetration, nano-silver element permeable formation 3, certain bamboo and wood lumber ontology 1 are formed inside bamboo and wood lumber ontology 1
Also the deposition of nano-silver element is had on lower surface；But at this point, the silver plate 2 of the upside of bamboo and wood lumber ontology 1, into plate
Portion permeates less, and nano-silver element is all deposited on substantially on 1 upper surface of bamboo and wood lumber ontology, forms nano-silver element deposition
Layer 4.
Therefore, as shown in figure 4, by step S3 high-pressure electrostatic treated bamboo and wood lumber ontology 1, then by two blocks of silver plates
2 connection types are exchanged, i.e., the upside silver plate 2 being connected on HV generator cathode originally are grounded, what is be grounded originally
Downside silver plate 2 is connected to the cathode of HV generator, continues high-pressure electrostatic processing.At this point, originally in bamboo and wood scutum
The nano-silver element that the nano-silver element and upside silver plate 2 of the nano-silver element sedimentary 4 of 1 upper surface of material ontology are excited is quiet
Continue the infiltration in plate under electric field action, also forms nano-silver element permeable formation inside 1 upper surface of bamboo and wood lumber ontology
3, and 1 downside surface of bamboo and wood lumber ontology for having formed nano-silver element permeable formation 3 also forms one layer of nano-silver element and sinks
Lamination 4.Be designed in this way so that material modification more comprehensively thoroughly, anticorrosive mildewproof better effect.
S4, after step S3 high-pressure electrostatic handles 2h~for 24 hours, close high-voltage electrostatic field, hot press release, treated
Bamboo and wood lumber ontology 1 is cooling, completes the modification of bamboo and wood lumber sheet 1, and next step machine-shaping is spare.It is worth mentioning
It is the high-pressure electrostatic processing lower than 2h, anticorrosive mildewproof effect is unstable；Higher than for 24 hours, experiment, which measures nano-silver element content, not to be had
Biggish promotion.
Further, in order to guarantee the fitting effect of silver plate 2 and bamboo and wood lumber ontology 1, step S1 is dried
1 surface of bamboo and wood lumber ontology afterwards carries out sanding processing, and sanding amount is 0.3mm~0.5mm, so that bamboo and wood lumber ontology 1
Surface is more smooth, and sanding amount is very few, and 1 surface irregularity of bamboo and wood lumber ontology, sanding amount is excessive, cause waste of material, at
This increase.
Temperature is excessively high in order to prevent, causes bamboo and wood lumber ontology 1 to be carbonized, hot-pressing processing temperature is not high in step S2
Plate face pressure design is 0.1MPa~0.5MPa when 150 DEG C, hot pressing, so that silver plate 2 and bamboo and wood lumber ontology 1 are more sticked on
Tightly.
The thickness for the silver plate 2 that the present invention uses is not less than 0.5mm, can give the patch of silver plate 2 and bamboo and wood lumber ontology 1
The certain first intensity in conjunction face, so that the stabilization of silver plate 2 is fitted in 1 surface of bamboo and wood lumber ontology, and the silver content of silver plate 2 is not less than
92.5%, guarantee that the nano-silver element amount being excited is more sufficient, increases the knot with chemical group in bamboo and wood lumber ontology 1
Conjunction rate further increases the stability of anticorrosive mildewproof treatment effect.
In order to enable bamboo and wood lumber ontology 1 is processed, anticorrosive mildewproof effect is improved, the sectional dimension of silver plate 2 is not
Less than the sectional dimension of bamboo and wood lumber ontology 2.
The present invention will be described in detail in the following with reference to the drawings and specific embodiments.
Embodiment 1
(1) prepared by sample
The sample plate that specification is 50mm × 50mm × 20mm (length × width × height) is made in wood materials.
(2) sample high-pressure electrostatic is handled
1) wooden sample plate is dried, the wooden sample plate end moisture content after drying is 5%.
2) sanding processing is carried out to by the dry wooden sample plate surface of step 1), sanding amount is 0.3mm.
3) silver plate 2 of two pieces of 55mm × 55mm × 2mm (length × width × height) is individually positioned in the wooden sample after drying
The upper/lower terminal face in plate thickness direction, the silver content of silver plate 2 is 92.5%, and is put into hot press together, is carried out at hot pressing
Reason, hot pressing temperature are set as room temperature (not heating), and plate face pressure is set as 0.1MPa.
4) silver plate 2 is connected to HV generator cathode, voltage 20kV on the upside of wooden sample plate；Wooden sample board
Silver plate 2 on the downside of material is grounded.
5) after carrying out high-pressure electrostatic processing 2h to wooden sample plate, high voltage electric field, hot press release, to wooden examination are closed
Template material is cooling, and machine-shaping is spare.
As shown in Fig. 2, by method of modifying treated the wooden sample plate of the present embodiment along direction of an electric field 5, by
Under it is supreme successively include nano-silver element permeable formation 3, bamboo and wood lumber ontology 1 and nano-silver element sedimentary 4.Through detecting nanometer
Silver element permeable formation 3 includes nano silver and nano phase ag_2 o, and the maximum penetration depth of nano-silver element is 0.05mm；Nanometer silver dollar
Plain sedimentary 4 with a thickness of 0.01mm, the nano-silver element that nano-silver element sedimentary 4 detects includes nano silver, nano oxygen
Change silver and nanometer silver peroxide.
(3) sample anticorrosive mildewproof performance measurement
By the outdoor placement of the wooden sample plate of the present embodiment 3 months, anticorrosive mildewproof effect is observed.
Referring to the operating procedure of embodiment 1, by changing hot press temperature, pressure, high-voltage electrostatic field voltage value or high pressure
The electrostatic treatment time, other operating parameters are constant, obtain other 23 groups wooden sample plates, and measure its anticorrosive mildewproof performance, survey
Surely it the results are shown in Table 1, the maximum penetration depth in wooden sample plate of nano-silver element is 0.8mm.
Comparative example 1
(1) prepared by control sample
The wooden sample plate of comparison that specification is 50mm × 50mm × 20mm (length × width × height) is made in wood materials.
(2) control sample anticorrosive mildewproof performance measurement
By the outdoor placement of the wooden sample plate of the comparison of comparative example 13 months, anticorrosive mildewproof effect is observed, measurement result is shown in
Table 1.
Table 1
Embodiment 25
(1) prepared by sample
The sample plate that specification is 50mm × 50mm × 10mm (length × width × height) is made in bamboo material.
(2) sample high-pressure electrostatic is handled
1) bamboo matter sample plate is dried, the bamboo matter sample plate end moisture content after drying is 11%.
2) sanding processing is carried out to by the dry bamboo matter sample plate surface of step 1), sanding amount is 0.5mm.
3) silver plate 2 of two pieces of 55mm × 55mm × 2mm (length × width × height) is individually positioned in the bamboo matter sample after drying
The upper/lower terminal face in plate thickness direction, the silver content of silver plate 2 is 95.0%, and is put into hot press together, is carried out at hot pressing
Reason, hot pressing are set as room temperature (not heating), and pressure is set as 0.1MPa.It should be noted that remaining after high-pressure electrostatic processing
Silver plate 2 can be repeated as many times and utilize.
4) silver plate 2 is connected to HV generator anode, voltage 20kV, bamboo matter sample board on the upside of bamboo matter sample plate
Silver plate 2 is grounded on the downside of material.
5) after carrying out high-pressure electrostatic processing 2h to bamboo matter sample plate, high voltage electric field is closed, hot press release is tried to bamboo matter
Template material is cooling, and machine-shaping is spare.
As shown in figure 3, by method of modifying treated the bamboo matter sample plate of the present embodiment along direction of an electric field 5, by
It include successively nano-silver element permeable formation 3, bamboo and wood lumber ontology 1 and nano-silver element sedimentary 4 under, through detecting this reality
The nano-silver element permeable formation 3 for applying example includes nano silver, nano phase ag_2 o and nanometer silver peroxide, and the maximum of nano-silver element seeps
Saturating depth is 0.1mm；The nano silver of nano-silver element sedimentary 4 detected with a thickness of 0.01mm, nano-silver element sedimentary 4
Element includes nano silver, nano phase ag_2 o and nanometer silver peroxide.
(3) sample anticorrosive mildewproof performance measurement
By the outdoor placement of the bamboo matter sample plate of the present embodiment 3 months, anticorrosive mildewproof effect is observed.
Referring to the operating procedure of embodiment 25, by changing hot press temperature, pressure, high-voltage electrostatic field voltage value or high pressure
The electrostatic treatment time, other operating parameters are constant, obtain other 23 groups of bamboo matters sample plate, and measure its anticorrosive mildewproof performance, survey
Surely 2 be the results are shown in Table, the maximum penetration depth in bamboo matter sample plate of nano-silver element is 1mm.
Comparative example 2
(1) prepared by control sample
The bamboo sample plate of comparison that specification is 50mm × 50mm × 10mm (length × width × height) is made in bamboo material.
(2) control sample anticorrosive mildewproof performance measurement
By the outdoor placement of the bamboo sample plate of the comparison of comparative example 23 months, anticorrosive mildewproof effect is observed, measurement result is shown in
Table 2.
Table 2
Embodiment 49
(1) prepared by sample
By 7 layers of Wood-bamboo composite laminates: upper and lower surface is the board using poplar board of 1.5mm thickness, and the secondary outer layer of lower surface is 2.5mm
Thick bamboo chip layer, the mean gap between bamboo chip are 3mm wide, remaining 4 layers be also 1.5mm thickness board using poplar board.The paving of laminate
If it is positive quadraturing laying that mode, which is intermediate 4 layers, the poplar of layer and lower surface time outer layer bamboo chip are by 0 ° of rift grain direction paving on remaining
If the Wood-bamboo composite laminates sample plate that specification is 50mm × 50mm × 20mm (length × width × height) is made.
(2) sample high-pressure electrostatic is handled
1) Wood-bamboo composite laminates sample plate is dried, the wooden sample plate end moisture content after drying is 8%.
2) sanding processing is carried out to by the dry Wood-bamboo composite laminates sample plate surface of step 1), sanding amount is
0.4mm。
3) by the silver plate 2 of two pieces of 55mm × 55mm × 2mm (length × width × height) be individually positioned in it is dry after bamboo and wood it is compound
The upper/lower terminal face of laminate sample plate thickness direction, the silver content of silver plate 2 is 99.0%, and is put into hot press together, into
Row hot-pressing processing, hot pressing temperature are set as room temperature (not heating), and plate face pressure is set as 0.5MPa.
4) silver plate 2 is connected to HV generator cathode, voltage 40kV on the upside of Wood-bamboo composite laminates sample plate；
Silver plate 2 on the downside of Wood-bamboo composite laminates sample plate is grounded.
5) after carrying out high-pressure electrostatic processing for 24 hours to Wood-bamboo composite laminates sample plate, high voltage electric field is closed, hot press unloads
Pressure, cooling to Wood-bamboo composite laminates sample plate, machine-shaping is spare.
Similar with Fig. 2, the Wood-bamboo composite laminates sample plate of the present embodiment is along direction of an electric field 5, from the bottom to top successively
Including nano-silver element permeable formation 3, bamboo and wood lumber ontology 1 and nano-silver element sedimentary 4.Through detection nano-silver element infiltration
Layer 3 includes nano silver, nano phase ag_2 o and nanometer silver peroxide, and maximum penetration depth is inside nano-silver element support plate material
0.6mm；Nano-silver element sedimentary 4 with a thickness of 0.02mm, the nano-silver element that nano-silver element sedimentary 4 detects includes
Nano silver, nano phase ag_2 o and nanometer silver peroxide.
(4) sample anticorrosive mildewproof performance measurement
By the outdoor placement of the Wood-bamboo composite laminates sample plate of the present embodiment 3 months, anticorrosive mildewproof effect, measurement are observed
It the results are shown in Table 3.
Embodiment 50
(1) prepared by sample
By 7 layers of Wood-bamboo composite laminates: upper and lower surface is the board using poplar board of 1.5mm thickness, and the secondary outer layer of lower surface is 2.5mm
Thick bamboo chip layer, the mean gap between bamboo chip are 3mm wide, remaining 4 layers be also 1.5mm thickness board using poplar board.The paving of laminate
If it is positive quadraturing laying that mode, which is intermediate 4 layers, the poplar of layer and lower surface time outer layer bamboo chip are by 0 ° of rift grain direction paving on remaining
If the Wood-bamboo composite laminates sample plate that specification is 50mm × 50mm × 20mm (length × width × height) is made.
(2) sample high-pressure electrostatic is handled
1) Wood-bamboo composite laminates sample plate is dried, the wooden sample plate end moisture content after drying is 8%.
2) sanding processing is carried out to by the dry Wood-bamboo composite laminates sample plate surface of step 1), sanding amount is
0.4mm。
3) by the silver plate 2 of two pieces of 55mm × 55mm × 2mm (length × width × height) be individually positioned in it is dry after bamboo and wood it is compound
The upper/lower terminal face of laminate sample plate thickness direction, the silver content of silver plate 2 is 99.0%, and is put into hot press together, into
Row hot-pressing processing, hot pressing temperature are set as room temperature (not heating), and plate face pressure is set as 0.5MPa.
4) silver plate 2 is connected to HV generator cathode, voltage 40kV on the upside of Wood-bamboo composite laminates sample plate；
Silver plate 2 on the downside of Wood-bamboo composite laminates sample plate is grounded.
5) after carrying out high-pressure electrostatic processing 12h to Wood-bamboo composite laminates sample plate, high voltage electric field is closed, hot press unloads
Pressure.
6) upside silver plate 2 is grounded again, the silver plate 2 of downside connects HV generator cathode, then carries out hot-pressing processing, heat
Pressure temperature setting is room temperature (not heating), and plate face pressure is set as 0.5MPa, then after carrying out high-pressure electrostatic processing 12h, is closed high
Piezoelectric field, hot press release is cooling to Wood-bamboo composite laminates sample plate, and machine-shaping is spare.
As shown in figure 4, the Wood-bamboo composite laminates sample plate of the present embodiment is along plate thickness direction, inside plate by
Under it is supreme successively include nano-silver element permeable formation 3, bamboo and wood lumber ontology 1 and nano-silver element permeable formation 3.Through detecting nanometer
Silver element permeable formation 3 includes nano silver, nano phase ag_2 o and nanometer silver peroxide, 3 nano silver of two sides nano-silver element permeable formation
The maximum penetration depth of element is in 0.5mm.
(5) sample anticorrosive mildewproof performance measurement
By the outdoor placement of the Wood-bamboo composite laminates sample plate of the present embodiment 3 months, anticorrosive mildewproof effect, measurement are observed
It the results are shown in Table 3.
Comparative example 3
(1) prepared by control sample
By 7 layers of Wood-bamboo composite laminates: upper and lower surface is the board using poplar board of 1.5mm thickness, and the secondary outer layer of lower surface is 2.5mm
Thick bamboo chip layer, the mean gap between bamboo chip are 3mm wide, remaining 4 layers be also 1.5mm thickness board using poplar board.The paving of laminate
If it is positive quadraturing laying that mode, which is intermediate 4 layers, the poplar of layer and lower surface time outer layer bamboo chip are by 0 ° of rift grain direction paving on remaining
If the comparison Wood-bamboo composite laminates sample plate that specification is 50mm × 50mm × 20mm (length × width × height) is made.
(3) control sample anticorrosive mildewproof performance measurement
By the outdoor placement of the comparison Wood-bamboo composite laminates sample plate of comparative example 33 months, anticorrosive mildewproof effect is observed,
Measurement result is shown in Table 3.
Table 3
Wherein, anti-mold effect evaluation index:
0: experiment surface sterile silk；
1: specimen surface infection hypha area < 1/4；
2: specimen surface infection hypha area is 1/4~1/2；
3: specimen surface infection hypha area is 1/2~3/4；
4: specimen surface infection hypha area 3/4~1；
5: specimen surface infection hypha area 1.
Anti-corrosion effect (corrosion resistant grade and weight loss percentage) evaluation index is shown in Table 4:
Table 4
| Resistance to rotten grade | Weight loss percentage |
| The last I corrosion resistant | 0%~10% |
| II corrosion resistant | 11%~24% |
| III is slightly resistance to rotten | 25%~44% |
| IV not corrosion resistant | 45%~70% |
| V is rotten | > 70% |
The preferred embodiment of the present invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, several deformations can also be made, improves and substitutes, these belong to this hair
Bright protection scope.
Claims (10)
1. a kind of bamboo and timber material method of modifying, it is characterised in that: under 20KV~60KV high voltage electrostatic field, to upper and lower
The bamboo and wood lumber ontology (1) that both ends of the surface are fitted with silver plate (2) carries out high-pressure electrostatic processing.
2. a kind of bamboo and timber material method of modifying according to claim 1 characterized by comprising
S1, dry bamboo and wood lumber ontology (1) to be processed；
S2, two pieces of silver plates (2) are individually positioned in upper and lower two of bamboo and wood lumber ontology (1) thickness direction after drying
End face, and carry out hot-pressing processing；
In S3, two pieces of silver plates (2), one of silver plate (2) connects HV generator, another block of silver plate
(2) it is grounded, the HV generator voltage is 20KV~60KV；
S4, high-pressure electrostatic processing 2h~for 24 hours.
3. a kind of bamboo and timber material method of modifying according to claim 2, it is characterised in that: bamboo and wood lumber to be processed
For ontology (1) after step S1 is dry, whole moisture content is 8 ± 3%.
4. a kind of bamboo and timber material method of modifying according to claim 2, it is characterised in that: after being dried to step S1
Bamboo and wood lumber ontology (1) surface carry out sanding processing, sanding amount be 0.3mm~0.5mm.
5. a kind of bamboo and timber material method of modifying according to claim 2 or 4, it is characterised in that: in step S2, at hot pressing
It manages temperature and is not higher than 150 DEG C, plate face pressure is 0.1MPa~0.5MPa when hot pressing.
6. a kind of bamboo and timber material method of modifying according to claim 2, it is characterised in that: pass through step S3 high-pressure electrostatic
Treated bamboo and wood lumber ontology (1), two pieces of silver plate (2) connection types are exchanged, and continue high-pressure electrostatic processing.
7. a kind of bamboo and timber material method of modifying according to claim 2, it is characterised in that: the thickness of the silver plate (2)
Not less than 0.5mm, and silver content is not less than 92.5%；The sectional dimension of the silver plate (2) is not less than the bamboo and wood lumber sheet
The sectional dimension of body (1).
8. a kind of bamboo and wood lumber, it is characterised in that: the plate successively includes nano-silver element infiltration along plate thickness direction
Layer (3), bamboo and wood lumber ontology (1) and nano-silver element sedimentary (4)/nano-silver element permeable formation (3).
9. a kind of bamboo and wood lumber according to claim 8, it is characterised in that: nano-silver element includes nano silver, nanometer
The combination of one or more of silver oxide or nanometer silver peroxide.
10. a kind of bamboo and wood lumber according to claim 8 or claim 9, it is characterised in that: the nano-silver element permeable formation
(3) penetration depth in the bamboo and wood lumber ontology (1) is 0.05mm~1.0mm.
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| CN201910460325.0A CN110202649B (en) | 2019-05-30 | 2019-05-30 | Bamboo wood material modification method and bamboo wood board |
| PCT/CN2019/106384 WO2020237917A1 (en) | 2019-05-30 | 2019-09-18 | Bamboo and wood material modification method, and bamboo and wood plate |
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| CN111851773A (en) * | 2020-06-28 | 2020-10-30 | 广东欣禄工程建设有限公司 | Assembled wall based on BIM technique |
| WO2020237917A1 (en) * | 2019-05-30 | 2020-12-03 | 南京林业大学 | Bamboo and wood material modification method, and bamboo and wood plate |
| CN112060249A (en) * | 2020-09-15 | 2020-12-11 | 清华大学 | Wood preservative treatment equipment and method |
| CN112589937A (en) * | 2020-12-08 | 2021-04-02 | 扬州大学 | Method for improving penetration of preservative in wood |
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| WO2020237917A1 (en) | 2020-12-03 |
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