CN108177222A - A kind of processing method using plasma-deposited micro-and nano-particles enhancing wood preservation anti-microbial property - Google Patents
A kind of processing method using plasma-deposited micro-and nano-particles enhancing wood preservation anti-microbial property Download PDFInfo
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- CN108177222A CN108177222A CN201711481828.3A CN201711481828A CN108177222A CN 108177222 A CN108177222 A CN 108177222A CN 201711481828 A CN201711481828 A CN 201711481828A CN 108177222 A CN108177222 A CN 108177222A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/003—Treating of wood not provided for in groups B27K1/00, B27K3/00 by using electromagnetic radiation or mechanical waves
- B27K5/0035—Electron beam-radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/007—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process employing compositions comprising nanoparticles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
- B27K3/08—Impregnating by pressure, e.g. vacuum impregnation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
-
- 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
- B27K5/04—Combined bleaching or impregnating and drying of wood
-
- 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
- B27K2240/70—Hydrophobation treatment
Abstract
The present invention provides it is a kind of using plasma-deposited micro-and nano-particles enhancing wood preservation anti-microbial property processing method, specially：Timber is put into impregnating autoclave, pours into amino silicone coupling agent aqueous solution, carries out impregnating by pressure processing；Timber is removed into impregnating autoclave, then timber is put into baking oven, processing is dried；Micro-and nano-particles are added in the powder feeding machine of plasma processor, timber is put on the precisely locating platform of plasma processor, started plasma processor and deposition processes are carried out to wood surface, obtain the timber of surface deposition micro-and nano-particles.The processing method of the present invention, while wood preservation anti-microbial property is improved, significantly increase wood surface process layer and the bond strength of timber, and the hydrophobic performance of wood surface, barrier water enters wood internal, microbe survival environment is destroyed, finally significantly improves the service life of timber and anti-corrosive antibacterial durability.
Description
Technical field
The invention belongs to timber treatment technology fields more particularly to a kind of plasma-deposited micro-and nano-particles of utilization to enhance
The processing method of wood preservation anti-microbial property.
Background technology
The natural biomass materials that timber is made of lignin, cellulose and hemicellulose etc., in processing and utilization process
In easily by the rotten destruction of fungi, seriously affect and limit the use of timber or even cause very big economic loss.
At present, the preservation of timber against decay anti-microbial property is generally improved by Wooden modifying processing method, at this kind of Wooden modifying
Reason method can be divided into Physical and chemical method.Physical includes fumigation, high temperature drying sterilization, water seaoning, baking, brushing
Method, infrared heating method and supercritical ultrasonics technology etc., the processing cost of Physical is relatively low, easy to operate, general environmentally safe, but kills
Bacterium worm effect is poor, without lasting protectiveness, so Physical is not used alone generally.Chemical method mainly with chemical agent into
Row processing can effectively kill the mould infected in timber and parasitic pest with chemical agent, but also can protect
Timber is no longer corroded by bacterium worm；The advantages of chemical method is that protection effect is good, does not damage the physicochemical characteristics of timber, but flows
Journey, complicated for operation, processing cost is high, and durability and leach resistance are poor.Therefore, research and development one kind is at low cost, durability is high, anti-
Rotten anti-microbial property is excellent and the Wood treatment method harmless to human and environment has been particularly important.
Invention content
The technical problems to be solved by the invention are to overcome the shortcomings of to mention in background above technology and defect, provide one
Kind enhances the processing method of wood preservation anti-microbial property using plasma-deposited micro-and nano-particles, and this method is of low cost, right
Environmental-friendly, timber after treatment by using the treatment method has environmental protection, high-strength durable, superpower hydrophobicity, superelevation anti-corrosive antibacterial performance etc.
Advantage.
In order to solve the above technical problems, technical solution proposed by the present invention is：
A kind of processing method using plasma-deposited micro-and nano-particles enhancing wood preservation anti-microbial property, including following
Step：
(1) timber is put into impregnating autoclave, pours into amino silicone coupling agent aqueous solution, carry out impregnating by pressure processing；
(2) timber is removed into impregnating autoclave, processing is dried；
(3) micro-and nano-particles are added in the powder feeding machine of plasma processor, timber is put into corona treatment
On the precisely locating platform of device, start plasma processor and deposition processes are carried out to wood surface, it is micro-nano to obtain surface deposition
The timber of particle.
Above-mentioned processing method, it is preferred that micro-and nano-particles are micro-nano zinc oxide, micro-nano alkali in the step (3)
Formula copper carbonate, micro-nano silver oxide, micro-nano copper oxide, micro-nano zinc borate and one kind or several in micron/nanometer titanium dioxide
Kind；The micro-and nano-particles are the mixtures of nano-particle and micro particles, and grain size is 1nm~200 μm, due to the grain size model
Micro-and nano-particles in enclosing have high-specific surface area, form special construction in the micro-nano layer of wood surface deposition, have and dredge
Water effect can significantly improve the weather resistance of timber, reduce the erosion of Stain fungi, increase the useful life longevity of timber.
Above-mentioned processing method, it is preferred that amino silicone coupling agent aqueous solution is 3- aminopropyls in the step (1)
Triethoxysilane aqueous solution, divinyl triammonium base propyl trimethoxy silicane aqueous solution, 2- aminoethyls-aminopropyl trimethoxy
One or more of silane-water solution；The solid content of the amino silicone coupling agent aqueous solution is 4%~8%.The ammonia
Radical siloxane coupling agent can improve antimycotic timber, termite-proof and discoloration-resisting.
Above-mentioned processing method, it is preferred that be dried and specifically referred to timber in 35,65,85 and in the step (2)
At 105 DEG C, it is carried out continuously drying process respectively, the time is 20~30h.The processing method of the present invention, will be through amino silicone idol
Join the timber of agent impregnation, it is continuous drying under different temperatures from low to high, high temperature can be suddenly subjected to avoid amino
In the case of become ammonia and volatilize with moisture, amino is contributed to be affixed in timber, strengthens seemingly antibacterial action.
Above-mentioned processing method, it is preferred that the pressure that impregnating by pressure is handled in the step (1) is 4.5~8.5MPa, is protected
The pressure time is 90~180min.
Above-mentioned processing method, it is preferred that when plasma processor is in running order described in step (3), control work
Make voltage as 2~3kV, input power is 1~3kW, and pulse recurrence rate is 40~60kHz；
The powder feeding rate for controlling the powder feeding machine is 10-20cm3/ h, the rate travel of the precisely locating platform are
15-25mm/s。
Above-mentioned processing method, it is preferred that control the spray nozzle of the plasma processor and the distance of wood surface to be
15-25mm, the spray pressure of the spray nozzle is 0.15-0.25MPa.
Above-mentioned processing method, it is preferred that the load capacity of the micro-and nano-particles of wood surface is deposited on after the step (3)
For 150-800 μ g/cm2。
Above-mentioned processing method, it is preferred that the plasma processor plasma is generated by pulsed discharge, then
Wood surface is sprayed to by compressed air, the gas flow rate for controlling the compressed air is 25~35L/min.
Compared with prior art, the advantage of the invention is that：
(1) processing method of the invention, the micro-and nano-particles of use have high-specific surface area, and then improve the micro-nano grain of rice
Reactivity, validity and the compatibility of son and wood substrates, improve the barrier propterty of timber, significantly improve the preservation of timber against decay
Anti-microbial property.
(2) processing method of the invention, by the way that plasma will be utilized in wood surface again after timber pickling amino silicone
Spraying process deposits one layer of micro-and nano-particles, and while wood preservation anti-microbial property is improved, the two synergistic effect significantly increases
The hydrophobic performance of the bond strength and wood surface of wood surface process layer and timber, barrier water enter wood internal, destroy
Microbe survival environment finally significantly improves the service life of timber and anti-corrosive antibacterial durability.
(3) processing method of the invention, it is easy to operate, at low cost, environmentally friendly, there is stronger operability.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments, for those of ordinary skill in the art, without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the scanning electron microscope (SEM) photograph of wood surface after the embodiment of the present invention 1 is handled；
Fig. 2 is the contact angle determination figure of wood surface after the embodiment of the present invention 1 is handled；
Fig. 3 is the scanning electron microscope energy spectrum diagram of wood surface after the embodiment of the present invention 3 is handled.
Specific embodiment
For the ease of understanding the present invention, done more entirely below in conjunction with Figure of description and preferred embodiment to inventing herein
Face meticulously describes, but protection scope of the present invention is not limited to specific examples below.
Unless otherwise defined, all technical terms used hereinafter are generally understood meaning phase with those skilled in the art
Together.Technical term used herein is intended merely to the purpose of description specific embodiment, is not intended to the limitation present invention's
Protection domain.
Unless otherwise specified, various raw material, reagent, the instrument and equipment etc. used in the present invention can pass through city
Field is commercially available or can be prepared by existing method.
Embodiment 1：
A kind of processing method using plasma-deposited micro-and nano-particles enhancing wood preservation anti-microbial property of the present invention,
Include the following steps：
(1) timber is put into impregnating autoclave, it is water-soluble pours into the 3-aminopropyltriethoxysilane that solid content is 6.0%
Liquid pushes down timber to avoid floating, and solution is made to be totally submerged timber with weight, carries out impregnating by pressure processing, control pressure
For 8.0Mpa, dwell time 150min, later release；
(2) timber is removed into impregnating autoclave, cleans out the liquid of remained on surface, then timber is put into baking oven and is done
Dry processing distinguishes continuous processing time for for 24 hours under the conditions of 35,65,85 and 105 DEG C；
(3) micro-nano zinc oxide is added in the powder feeding machine of plasma processor, timber is put at plasma
On the precisely locating platform for managing device, start plasma processor and deposition processes are carried out to wood surface, plasma processor is medium
Gas ions are generated by pulsed discharge, then spray to wood surface by compressed air, when plasma is in running order, control
Operating voltage processed is 2.5kV, input power 2kW, pulse recurrence rate 50kHz, controls the powder feeding rate of powder feeding machine
10cm3/ h, the rate travel i.e. rate travel of timber for controlling precisely locating platform are 15mm/s；Control spray nozzle and timber table
The distance in face is 15mm, spray nozzle spray pressure is 0.15Mpa, and the gas flow rate of compressed air is 30 L/min, by deposition
After processing, the timber of surface deposition micro-and nano-particles is obtained, the load capacity of the micro-and nano-particles of deposition is 150 μ g/cm2。
Processing wood sample surface is characterized using electro microscope energy spectrum (SEM-EDS), with reference to American Wood Preservation Association mark
Quasi- AWPA E11-07 " standard method that timber preservative leachability judges " comment processed timber leach resistance
Valency, with reference to standard GB/T/T 13942.1-2009《Durability of wood energy part 1：Natural decay resistance laboratory test side
Method》Corrosion resistant experiment is carried out to processing timber, using contact angle instrument to the water contact angle on processing material surface and water roll angle into
Row measures.The result shows that zinc has uniformly been deposited on wood surface by wood surface after plasma spray coating deposition processes,
The scanning electron microscope (SEM) photograph of wood surface is as shown in Figure 1, as seen from the figure, it is special that micro-nano zinc oxide particles are formd in wood surface
Layer so that wood surface has hydrophobic performance；Turnover rate is only 8.6%, and leach resistance is good；Processing material is up to state standards will
The strong corrosion resistant of I grades asked；The contact angle determination figure on material surface is handled as shown in Fig. 2, its water contact angle is 152.9 ° as seen from the figure, rolling
Dynamic angle is 7.4 °, and hydrophobic performance is good.
Embodiment 2：
A kind of processing method using plasma-deposited micro-and nano-particles enhancing wood preservation anti-microbial property of the present invention,
Include the following steps：
(1) timber is put into impregnating autoclave, pours into the divinyl triammonium base propyl trimethoxy silicane that solid content is 6.0%
Aqueous solution pushes down timber to avoid floating, and solution is made to be totally submerged timber with weight, carries out impregnating by pressure processing, control
Pressure is 8.0Mpa, dwell time 150min, release later；
(2) timber is removed into impregnating autoclave, cleans out the liquid of remained on surface, then timber is put into baking oven and is done
Dry processing distinguishes continuous processing time for for 24 hours under the conditions of 35,65,85 and 105 DEG C；
(3) micro-nano copper oxide is added in the powder feeding machine of plasma processor, timber is put at plasma
On the precisely locating platform for managing device, start plasma processor and deposition processes are carried out to wood surface, plasma processor is medium
Gas ions are generated by pulsed discharge, then spray to wood surface by compressed air, when plasma is in running order, control
Operating voltage processed is 2.5kV, input power 2kW, pulse recurrence rate 50kHz, controls the powder feeding rate of powder feeding machine
15cm3/ h, the rate travel i.e. rate travel of timber for controlling precisely locating platform are 20mm/s；Control spray nozzle and timber table
The distance in face is 20mm, spray nozzle spray pressure is 0.2Mpa, and the gas flow rate of compressed air is 30L/min, by lodgment
After reason, the timber of surface deposition micro-and nano-particles is obtained, the load capacity of the micro-and nano-particles of deposition is 450 μ g/cm2。
Processing wood sample surface is characterized using electro microscope energy spectrum (SEM-EDS), with reference to American Wood Preservation Association mark
Quasi- AWPA E11-07 " standard method that timber preservative leachability judges " comment processed timber leach resistance
Valency, with reference to standard GB/T/T 13942.1-2009《Durability of wood energy part 1：Natural decay resistance laboratory test side
Method》Corrosion resistant experiment is carried out to processing timber, using contact angle instrument to the water contact angle on processing material surface and water roll angle into
Row measures.The result shows that copper has uniformly been deposited on wood surface by wood surface after plasma spray coating deposition processes；
Turnover rate is only 10.2%, and leach resistance is good；Processing material is up to state standards the strong corrosion resistant of I grades of requirement；Handle material surface
Water contact angle is 153.3 °, and roll angle is 5.7 °, and hydrophobic performance is good.
Embodiment 3：
A kind of processing method using plasma-deposited micro-and nano-particles enhancing wood preservation anti-microbial property of the present invention,
Include the following steps：
(1) timber is put into impregnating autoclave, pours into 2- aminoethyls-aminopropyl trimethoxysilane that solid content is 6.0%
It says solution, timber is pushed down to avoid floating, and solution is made to be totally submerged timber with weight, carry out impregnating by pressure processing, control
Pressure is 8.0Mpa, dwell time 150min, release later；
(2) timber is removed into impregnating autoclave, cleans out the liquid of remained on surface, then timber is put into baking oven and is done
Dry processing distinguishes continuous processing time for for 24 hours under the conditions of 35,65,85 and 105 DEG C；
(3) micron/nanometer titanium dioxide is added in the powder feeding machine of plasma processor, timber is put into plasma
On the precisely locating platform of processor, start plasma processor and deposition processes are carried out to wood surface, in plasma processor
Plasma is generated by pulsed discharge, then sprays to wood surface by compressed air, when plasma is in running order,
Control operating voltage is 2.5kV, input power 2kW, pulse recurrence rate 50kHz, controls the powder feeding rate of powder feeding machine
20cm3/ h, the rate travel i.e. rate travel of timber for controlling precisely locating platform are 25mm/s；Control spray nozzle and timber table
The distance in face is 25mm, spray nozzle spray pressure is 0.25Mpa, and the gas flow rate of compressed air is 30L/min, by lodgment
After reason, the timber of surface deposition micro-and nano-particles is obtained, the load capacity of the micro-and nano-particles of deposition is 800 μ g/cm2。
Processing wood sample surface is characterized using electro microscope energy spectrum (SEM-EDS), with reference to American Wood Preservation Association mark
Quasi- AWPA E11-07 " standard method that timber preservative leachability judges " comment processed timber leach resistance
Valency, with reference to standard GB/T/T 13942.1-2009《Durability of wood energy part 1：Natural decay resistance laboratory test side
Method》Corrosion resistant experiment is carried out to processing timber, using contact angle instrument to the water contact angle on processing material surface and water roll angle into
Row measures.The result shows that titanium has uniformly been deposited on wood surface by wood surface after plasma spray coating deposition processes,
After processing wood surface scanning electron microscope energy spectrum diagram as shown in figure 3, from the figure 3, it may be seen that in the sedimentary of wood surface containing Ti and
O；Turnover rate is only 7.8%, and leach resistance is good；Processing material is up to state standards the strong corrosion resistant of I grades of requirement；Handle material surface
Water contact angle is 153.8 °, and roll angle is 4.7 °, and hydrophobic performance is good.
Claims (9)
1. a kind of processing method using plasma-deposited micro-and nano-particles enhancing wood preservation anti-microbial property, feature exists
In including the following steps：
(1) timber is put into impregnating autoclave, pours into amino silicone coupling agent aqueous solution, carry out impregnating by pressure processing；
(2) timber is removed into impregnating autoclave, be dried；
(3) micro-and nano-particles are added in the powder feeding machine of plasma processor, timber is put into plasma processor
On precisely locating platform, start plasma processor and deposition processes are carried out to wood surface, obtain surface deposition micro-and nano-particles
Timber.
2. processing method according to claim 1, which is characterized in that micro-and nano-particles are micro-nano in the step (3)
Zinc oxide, micro-nano basic copper carbonate, micro-nano silver oxide, micro-nano copper oxide, micro-nano zinc borate and micro-nano titanium dioxide
One or more of titanium；The grain size of the micro-and nano-particles is 1nm~200 μm.
3. processing method according to claim 1 or 2, which is characterized in that middle amino silicone coupling in the step (1)
Agent aqueous solution is 3-aminopropyltriethoxysilane aqueous solution, divinyl triammonium base propyl trimethoxy silicane aqueous solution, 2-
One or more of aminoethyl-aminopropyl trimethoxysilane aqueous solution；The amino silicone coupling agent aqueous solution is consolidated
Content is 4%~8%.
4. processing method according to claim 1 or 2, which is characterized in that be dried and specifically refer in the step (2)
Timber is carried out continuously drying process respectively at 35,65,85 and 105 DEG C, the time is 20~30h.
5. processing method according to claim 1 or 2, which is characterized in that the pressure that impregnating by pressure is handled in the step (1)
Power is 4.5~8.5MPa, and the dwell time is 90~180min.
6. processing method according to claim 1 or 2, which is characterized in that plasma processor is in described in step (3)
During working condition, control operating voltage is 2~3kV, and input power is 1~3kW, and pulse recurrence rate is 40~60kHz；
The powder feeding rate for controlling the powder feeding machine is 10-20cm3/ h, the rate travel of the precisely locating platform is 15-
25mm/s。
7. processing method according to claim 1 or 2, which is characterized in that control the spray nozzle of the plasma processor
Distance with wood surface is 15-25mm, and the spray pressure of the spray nozzle is 0.15-0.25MPa.
8. processing method according to claim 1 or 2, which is characterized in that be deposited on wood surface after the step (3)
The load capacity of micro-and nano-particles is 150-800 μ g/cm2。
9. processing method according to claim 1 or 2, which is characterized in that the plasma processor plasma leads to
Extra pulse electric discharge generates, and then sprays to wood surface by compressed air；Control the gas flow rate of the compressed air for 25~
35L/min。
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| CN109773926A (en) * | 2019-01-16 | 2019-05-21 | 华南农业大学 | A kind of wood bamboo material and preparation method thereof with super-hydrophobic fungus-proof antisepsis coating |
| CN110605767A (en) * | 2019-10-25 | 2019-12-24 | 毛克升 | Wear-resistant treatment method for Chinese fir |
| CN112871140A (en) * | 2021-01-08 | 2021-06-01 | 贵州省林业科学研究院 | Modified bamboo charcoal material for treating cadmium pollution in water and preparation method thereof |
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| CN109773926B (en) * | 2019-01-16 | 2021-01-01 | 华南农业大学 | Wood and bamboo material with super-hydrophobic mildew-proof anticorrosive coating and preparation method thereof |
| CN110605767A (en) * | 2019-10-25 | 2019-12-24 | 毛克升 | Wear-resistant treatment method for Chinese fir |
| CN112871140A (en) * | 2021-01-08 | 2021-06-01 | 贵州省林业科学研究院 | Modified bamboo charcoal material for treating cadmium pollution in water and preparation method thereof |
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Application publication date: 20180619 |