CN114523536A - Treatment process for improving wood processing plasticity - Google Patents

Treatment process for improving wood processing plasticity Download PDF

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Publication number
CN114523536A
CN114523536A CN202210223036.0A CN202210223036A CN114523536A CN 114523536 A CN114523536 A CN 114523536A CN 202210223036 A CN202210223036 A CN 202210223036A CN 114523536 A CN114523536 A CN 114523536A
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wood
treatment
bamboo
gluing
improving
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CN114523536B (en
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徐学进
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Funan Jiali Crafts Co ltd
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Funan Jiali Crafts Co ltd
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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
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
    • 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
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
    • B27K5/003—Treating of wood not provided for in groups B27K1/00, B27K3/00 by using electromagnetic radiation or mechanical waves
    • B27K5/0055—Radio-waves, e.g. microwaves

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Plasma & Fusion (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

The invention discloses a treatment process for improving wood processing plasticity, which relates to the technical field of wood processing, and is characterized in that wood is immersed into a treatment fluid A after microwave pretreatment and is subjected to plasma treatment, is immersed into a treatment fluid B after hydrothermal treatment and is subjected to plasma treatment, and is subjected to hydrothermal reaction; the treatment fluid A comprises a sulfur source and an antimony source; the treatment liquid B consists of tungstate and ethanol, and is adjusted to be acidic. According to the invention, the wood is soaked by using the prepared treatment liquid A and the treatment liquid B, plasma treatment is carried out in the soaking process, hydrothermal treatment and hydrothermal reaction are respectively carried out after treatment, so that a continuous-phase net-shaped structure is formed in the wood, and a lamellar convex layer is grown on the surface of the net-shaped structure, so that the bending degree of the wood in bending is improved, the resilience rate is reduced, and the wood can better meet the industrial requirements.

Description

Treatment process for improving wood processing plasticity
Technical Field
The invention belongs to the technical field of wood processing, and particularly relates to a treatment process for improving wood processing plasticity.
Background
The wood is a natural material which has wide application and is easy to develop and utilize, is a main raw material for manufacturing wickerwork, is influenced by the physical and mechanical properties of the wood, and needs to be softened to a certain degree under certain production conditions. After the wood is softened, the plasticity is improved, the hardness is reduced, the processing difficulty is effectively reduced, the possibility of processing damage of the wood during weaving is reduced, and the quality of the wicker product is improved.
The main chemical components of the wood are cellulose, hemicellulose and lignin, and the physical properties of the wood are closely related to the interaction of the three components. The cellulose and the lignin inhibit the plasticity and the flexibility of the wood, the crystalline region of the cellulose and the lignin promotes the toughness reduction and the strength increase of the wood, and the crystalline region of the lignin is used as a macromolecular compound with a complex structure to provide higher rigidity, and meanwhile, stronger chemical bonds can be formed between the lignin and other components. The above functions make the wood form a stable whole which is not easy to generate plastic deformation at normal temperature. At present, the softening of wood is mainly divided into physical softening and chemical softening, and common physical or chemical softening methods can meet the requirements aiming at the part of wood with low requirement on plasticity, but the prior art can not meet the requirements aiming at the part of wood with higher requirement on plasticity. For example, the wood with larger size and density is subjected to a conventional physical or chemical softening method, the bending degree of the wood can be adjusted only within the range of 1:3-1:6, and the resilience reaches 5% -10%, so that the plasticity of the wood is general and the requirement of the wood cannot be met.
Disclosure of Invention
In view of the problems in the prior art, the invention provides a treatment process for improving the plasticity of wood processing, which comprises the steps of immersing wood subjected to microwave pretreatment into a prepared treatment solution A for plasma treatment, performing hydrothermal treatment, immersing into a prepared treatment solution B for plasma treatment, and performing hydrothermal reaction.
The invention is realized by the following technical scheme:
a treatment process for improving wood processing plasticity comprises the following steps:
immersing wood after microwave pretreatment into the treatment liquid A and carrying out plasma treatment, immersing the wood into the treatment liquid B after hydrothermal treatment and carrying out plasma treatment, and carrying out hydrothermal reaction.
According to the invention, through microwave treatment on the wood, the energy of high-energy microwaves can enable the interior of the wood to generate micro-damage, so that a large number of micro-cracks are generated in the interior of the wood, the permeability of the wood is increased, and the subsequent treatment liquid is facilitated to permeate into the interior of the wood.
According to the invention, the wood is sequentially soaked in the treatment liquid A and the treatment liquid B and subjected to plasma treatment, the surface of the wood can be oxidized and etched by using the plasma treatment, the capillary action of the wood on the treatment liquid is improved, and the permeation of the treatment liquid into the wood is promoted, so that the treatment liquid can be filled in the wood.
According to the invention, antimony potassium tartrate is used as an antimony source, thioacetamide is used as a sulfur source, a large amount of antimony sulfide nano particles are generated in the wood through hydrothermal treatment, agglomeration phenomenon occurs among the antimony sulfide nano particles along with the prolonging of the hydrothermal treatment time, some net structures grow from the surface, and the net structures continuously grow along with the gradual reduction of the antimony sulfide nano particles, so that a complete continuous phase net structure is finally formed in the wood; meanwhile, in order to inhibit the growth habit of the antimony sulfide crystal nucleus and control the growth rate, polyvinylpyrrolidone is introduced into the treating fluid A, so that agglomeration among antimony sulfide crystal grains can be avoided, and the antimony sulfide crystal nucleus grows into smaller crystal grains.
According to the invention, after a continuous phase network structure is constructed and formed in the wood, the wood is soaked in the treatment liquid B again for hydrothermal reaction, the treatment liquid B filled in the wood is subjected to hydrothermal reaction, the network structure is taken as a growth matrix, nano sheets which are uniform and consistent grow on the surface of the network structure, and a large number of nano sheets form a lamellar convex layer on the surface of the network structure.
According to the invention, the reticular structure is constructed in the wood, so that the effect of dispersing stress is achieved, the stress concentration of the wood during bending is reduced, the wood has larger bending degree, and the lamellar convex layers are generated on the surface of the reticular structure, so that the lamellar nano sheets in the convex layers are embedded with each other during bending of the wood, the reticular structure forms a folded shape, the bending wood can be inhibited from being restored to the original shape, and the rebound rate of the wood is reduced.
In a specific embodiment, the microwave treatment is performed on the wood, and the softening treatment is performed by adopting a high-temperature hydrothermal treatment mode.
Through carrying out softening treatment to timber for timber can reach balanced moisture content in the constant temperature and humidity case fast, has increased the water content in the timber, makes timber when carrying out microwave treatment, can produce more heats, thereby has also accelerated the inside micro crack's of timber formation.
In a specific embodiment, the temperature of the high-temperature hydrothermal treatment is preferably 120-180 ℃, the time is 50-120min, and the bath ratio is 1: 10-20.
In a specific embodiment, in the high-temperature hydrothermal treatment, the temperature is preferably raised from room temperature to the set temperature at a rate of 2-5 ℃/min.
In a specific embodiment, after the wood is softened, the wood is placed in a constant temperature and humidity box and is regulated to the equilibrium moisture content under the conditions of 20-25 ℃ and 60-65%.
In one specific embodiment, the microwave treatment cavity preferably has a length of 0.5m, a microwave power of 100kW and a transmission speed of 1.0-1.5m/h of 140 kW.
In a specific embodiment, the wood is air dried to a moisture content of less than 12% after microwave treatment.
In a specific embodiment, the molar ratio of the sulfur source to the antimony source in the treating solution A is 1: 2.0-2.3.
In a particular embodiment, the preferred sulfur source is thioacetamide and the antimony source is potassium antimony tartrate.
In a specific embodiment, the treatment solution a is further added with polyvinylpyrrolidone, and the addition amount of polyvinylpyrrolidone is 0.05-0.20% of the mass of the antimony source.
In a specific embodiment, the solvent used in the treatment solution A is deionized water, and the ratio of the deionized water to the antimony potassium tartrate is 1:4.0-8.5 mL/g.
In one embodiment, the treatment liquid A is preferably prepared as follows:
dissolving 4-10M antimony potassium tartrate in 0.3-1.5L deionized water, magnetically stirring for 10-30min, adding 2-10g polyvinylpyrrolidone after the antimony potassium tartrate is completely dissolved, stirring for 5-15min at the speed of 100-160r/min, then adding 8-20M thioacetamide into the mixed solution, and magnetically stirring for 20-50min to obtain the treatment solution A.
In a specific embodiment, the ratio of tungstate to ethanol in the treating solution B is 1:10-15g/mL, and the pH value of the treating solution B is 1.5-2.0.
In one particular embodiment, the preferred tungstate is sodium tungstate dihydrate.
In a specific embodiment, in the treatment solution B, the tungstate and the ethanol are mixed and then subjected to constant volume, and the distilled water used for constant volume is 2.0-2.5 times of the volume of the ethanol.
In one embodiment, the treatment liquid B is preferably prepared as follows:
15-50g of sodium tungstate dihydrate is placed in a container, 0.2-0.6L of ethanol is added, distilled water is used for fixing the volume to 0.6-2.0L, and then 95-98% concentrated sulfuric acid is used for adjusting the pH value to 1.5-2.0, so that a treatment solution B is obtained.
In a specific embodiment, the power of the plasma treatment is 4.5-6.0 kW.
In a particular embodiment, the wood re-guide rollers are moved into the plasma treatment zone during plasma treatment.
In a particular embodiment, the speed of the guide rollers is preferably between 2 and 5 m/min.
In a specific embodiment, the temperature of the hydrothermal treatment is preferably 180-.
In a specific embodiment, the temperature of the hydrothermal reaction is preferably 95-98 ℃ and the reaction time is 7-10 h.
In a specific embodiment, the wood is further dried after the hydrothermal reaction.
In a specific embodiment, the drying temperature is preferably 60-80 ℃ and the drying time is preferably 20-25 h.
Compared with the prior art, the invention has the following advantages:
according to the invention, the wood is soaked by using the prepared treatment liquid A and the treatment liquid B, plasma treatment is carried out in the soaking process, hydrothermal treatment and hydrothermal reaction are respectively carried out after treatment, so that a continuous-phase net-shaped structure is formed in the wood, and a lamellar convex layer is grown on the surface of the net-shaped structure, so that the bending degree of the wood is improved when the wood is bent, the resilience rate is reduced, the wood with larger size and density can also have better plasticity, and the wood can better meet the industrial requirements.
Detailed Description
Example 1
1. Selection of wood
Selecting Larix olgensis with density of 0.59g/cm3Hardness of end face 335kg/cm2The obtained sheet was processed into a single sheet of 400 mm. times.100 mm. times.30 mm.
2. Plasticity treatment process for wood
S1 pretreatment of wood
Setting the high-temperature hydrothermal treatment temperature to be 120 ℃, the time to be 50min and the bath ratio to be 1:10, cleaning the surface of the wood at room temperature, then putting the cleaned wood into an electric heating cooking pot, heating to the set temperature at the speed of 2 ℃/min, keeping the temperature and timing, releasing pressure and cooling after the set time is reached, taking out the wood, then putting the wood into a constant-temperature constant-humidity box, and adjusting the wood to balance the moisture content for later use under the conditions of 20 ℃ and 60%;
performing microwave treatment on the wood by using tunnel type microwave treatment equipment with a microwave treatment cavity length of 0.5m, controlling the microwave power to be 100kW and the transmission speed to be 1.0m/h in the treatment process, and performing air drying and drying after the wood is subjected to microwave treatment until the water content is 12%;
s2 preparation of treatment solution
Dissolving 4M antimony potassium tartrate in 0.3L deionized water, magnetically stirring for 10min, adding 2g polyvinylpyrrolidone after the antimony potassium tartrate is completely dissolved, stirring for 5min at the speed of 100r/min, then adding 8M thioacetamide into the mixed solution, and magnetically stirring for 20min to obtain a treatment solution A;
putting 15g of sodium tungstate dihydrate into a container, adding 0.2L of ethanol, fixing the volume to 0.6L by using distilled water, and then adjusting the pH value to 1.5 by using 95% concentrated sulfuric acid to obtain a treatment solution B;
s3 plasma etching of wood
Horizontally immersing the wood subjected to microwave treatment into the treatment solution A, conveying the wood into a plasma treatment area at a speed of 2m/min under the action of a guide roller, setting the plasma treatment power to be 4.5kW, transferring the wood into a reaction kettle after treatment is finished, sealing the reaction kettle, placing the reaction kettle in a 180 ℃ oven, heating the reaction kettle at a constant temperature for 12 hours, cooling the reaction kettle to room temperature after the reaction is finished, taking out the wood, and washing the wood with deionized water for later use;
immersing the standby wood into the treatment liquid B, conveying the wood into a plasma treatment area at the speed of 2m/min under the action of a guide roller, setting the plasma treatment power to be 4.5kW, transferring the wood into a reaction kettle after treatment is finished, reacting for 7 hours at 95 ℃ after sealing, cooling to room temperature, taking out the wood, repeatedly and alternately washing the wood by using distilled water and ethanol, and drying for 20 hours at 60 ℃ to finish the treatment of the wood.
Example 2
1. Selection of wood
Selecting Larix olgensis with density of 0.59g/cm3Hardness of end face 335kg/cm2The obtained sheet was processed into a single sheet of 400 mm. times.100 mm. times.30 mm.
2. Plastic treatment process for wood
S1 pretreatment of wood
Setting the high-temperature hydrothermal treatment temperature to 150 ℃, the time to 80min and the bath ratio to 1:15, cleaning the surface of the wood at room temperature, then putting the cleaned wood into an electric heating cooking pot, heating to the set temperature at the speed of 3 ℃/min, keeping the temperature and timing, releasing pressure and cooling after the set time is reached, taking out the wood, then putting the wood into a constant-temperature constant-humidity box, and adjusting the wood to balance the moisture content for later use under the conditions of 23 ℃ and 62%;
performing microwave treatment on the wood by using tunnel type microwave treatment equipment with a microwave treatment cavity length of 0.5m, controlling the microwave power to be 120kW and the transmission speed to be 1.2m/h in the treatment process, and performing air drying and drying after the wood is subjected to microwave treatment until the water content is 10%;
s2 preparation of treatment solution
Dissolving 6M antimony potassium tartrate in 0.8L deionized water, magnetically stirring for 20min, adding 5g polyvinylpyrrolidone after the antimony potassium tartrate is completely dissolved, stirring for 10min at the speed of 150r/min, then adding 12M thioacetamide into the mixed solution, and magnetically stirring for 30min to obtain a treatment solution A;
placing 20g of sodium tungstate dihydrate in a container, adding 0.4L of ethanol, fixing the volume to 1.4L by using distilled water, and then adjusting the pH value to 1.8 by using 98% concentrated sulfuric acid to obtain a treatment liquid B;
s3 plasma etching of wood
Horizontally immersing the wood subjected to microwave treatment into the treatment solution A, conveying the wood into a plasma treatment area at a speed of 3m/min under the action of a guide roller, setting the plasma treatment power to be 5.5kW, transferring the wood into a reaction kettle after treatment is finished, sealing the reaction kettle, placing the reaction kettle in a 190 ℃ oven, heating the reaction kettle at a constant temperature for 18 hours, cooling the reaction kettle to room temperature after the reaction is finished, taking out the wood, and washing the wood with deionized water for later use;
immersing the standby wood into the treatment liquid B, conveying the wood into a plasma treatment area at the speed of 3m/min under the action of a guide roller, setting the plasma treatment power to be 5.5kW, transferring the wood into a reaction kettle after the treatment is finished, reacting at 96 ℃ for 8 hours after sealing, cooling to room temperature, taking out the wood, repeatedly and alternately washing the wood by using distilled water and ethanol, and drying at 70 ℃ for 23 hours to finish the treatment of the wood.
Example 3
1. Selection of wood
Selecting Larix Gmelini with density of 0.59g/cm3Hardness of end face 335kg/cm2The obtained sheet was processed into a single sheet of 400 mm. times.100 mm. times.30 mm.
2. Plasticity treatment process for wood
S1 pretreatment of wood
Setting the high-temperature hydrothermal treatment temperature to be 180 ℃, the time to be 120min and the bath ratio to be 1:20, cleaning the surface of the wood at room temperature, then putting the cleaned wood into an electric heating cooking pot, heating to the set temperature at the speed of 5 ℃/min, keeping the temperature and timing, releasing pressure and cooling after the set time is reached, taking out the wood, then putting the wood into a constant-temperature constant-humidity box, and adjusting the wood to balance the moisture content for later use under the conditions of 25 ℃ and 65%;
performing microwave treatment on the wood by using tunnel type microwave treatment equipment with a microwave treatment cavity length of 0.5m, controlling the microwave power to be 140kW and the transmission speed to be 1.5m/h in the treatment process, and performing air drying and drying after the wood is subjected to microwave treatment until the water content is 10%;
s2 preparation of treatment solution
Dissolving 10M antimony potassium tartrate in 1.5L of deionized water, magnetically stirring for 30min, adding 10g of polyvinylpyrrolidone after the antimony potassium tartrate is completely dissolved, stirring for 15min at the speed of 160r/min, then adding 20M thioacetamide into the mixed solution, and magnetically stirring for 50min to obtain a treatment solution A;
placing 50g of sodium tungstate dihydrate in a container, adding 0.6L of ethanol, fixing the volume to 2.0L by using distilled water, and then adjusting the pH value to 2.0 by using 98% concentrated sulfuric acid to obtain a treatment liquid B;
s3, plasma etching of wood
Horizontally immersing the wood subjected to microwave treatment into the treatment solution A, conveying the wood into a plasma treatment area at a speed of 5m/min under the action of a guide roller, setting the plasma treatment power to be 6.0kW, transferring the wood into a reaction kettle after treatment is finished, sealing the reaction kettle, placing the reaction kettle in a 200 ℃ oven, heating the reaction kettle at a constant temperature for 20 hours, cooling the reaction kettle to room temperature after the reaction is finished, taking out the wood, and washing the wood with deionized water for later use;
immersing the standby wood into the treatment liquid B, conveying the wood into a plasma treatment area at the speed of 5m/min under the action of a guide roller, setting the plasma treatment power to be 6.0kW, transferring the wood into a reaction kettle after treatment is finished, reacting for 10 hours at 98 ℃ after sealing, cooling to room temperature, taking out the wood, repeatedly and alternately washing the wood with distilled water and ethanol, and drying for 25 hours at 80 ℃ to finish the treatment of the wood.
Control group:
and (3) putting the wood into a 100 ℃ constant-temperature water bath pot, and steaming and boiling for 1h to fully soften the wood.
Comparative example 1:
the wood is only subjected to high-temperature hydrothermal treatment and microwave treatment, and the specific operations are as follows:
setting the high-temperature hydrothermal treatment temperature to be 120 ℃, the time to be 50min and the bath ratio to be 1:10, cleaning the surface of the wood at room temperature, then putting the cleaned wood into an electric heating cooking pot, heating to the set temperature at the speed of 2 ℃/min, keeping the temperature and timing, releasing pressure and cooling after the set time is reached, taking out the wood, then putting the wood into a constant-temperature constant-humidity box, and adjusting the wood to balance the moisture content for later use under the conditions of 20 ℃ and 60%;
and (2) performing microwave treatment on the wood by using tunnel type microwave treatment equipment with a microwave treatment cavity length of 0.5m, controlling the microwave power to be 100kW and the transmission speed to be 1.0m/h in the treatment process, and performing air drying and drying after the wood is subjected to microwave treatment until the water content is 12%.
Comparative example 2:
in comparison with example 1, treatment liquid B was omitted,
the specific operation is as follows:
s1 pretreatment of wood
Setting the high-temperature hydrothermal treatment temperature to be 120 ℃, the time to be 50min and the bath ratio to be 1:10, cleaning the surface of the wood at room temperature, then putting the wood into an electric heating cooking pot, heating to the set temperature at the speed of 2 ℃/min, keeping the temperature and timing, releasing the pressure and cooling after the set time is reached, taking out the wood, then putting the wood into a constant-temperature constant-humidity box, and adjusting the wood to balance the moisture content for later use under the conditions of 20 ℃ and 60%;
performing microwave treatment on the wood by using tunnel type microwave treatment equipment with a microwave treatment cavity length of 0.5m, controlling the microwave power to be 100kW and the transmission speed to be 1.0m/h in the treatment process, and performing air drying and drying after the wood is subjected to microwave treatment until the water content is 12%;
s2 preparation of treatment solution
Dissolving 4M antimony potassium tartrate in 0.3L deionized water, magnetically stirring for 10min, adding 2g polyvinylpyrrolidone after the antimony potassium tartrate is completely dissolved, stirring for 5min at the speed of 100r/min, then adding 8M thioacetamide into the mixed solution, and magnetically stirring for 20min to obtain a treatment solution A;
s3 plasma etching of wood
Horizontally immersing the wood subjected to microwave treatment into the treatment liquid A, conveying the wood into a plasma treatment area at a speed of 2m/min under the action of a guide roller, setting the plasma treatment power to be 4.5kW, transferring the wood into a reaction kettle after treatment is finished, sealing the reaction kettle, placing the reaction kettle in a 180 ℃ oven, heating the reaction kettle at a constant temperature for 12 hours, cooling the reaction kettle to room temperature after reaction is finished, taking out the wood, washing the wood with deionized water, and drying the wood at 60 ℃ for 20 hours to finish the treatment of the wood.
Comparative example 3:
in comparison with example 1, the treating liquid A was omitted,
the specific operation is as follows:
s1 pretreatment of wood
Setting the high-temperature hydrothermal treatment temperature to be 120 ℃, the time to be 50min and the bath ratio to be 1:10, cleaning the surface of the wood at room temperature, then putting the wood into an electric heating cooking pot, heating to the set temperature at the speed of 2 ℃/min, keeping the temperature and timing, releasing the pressure and cooling after the set time is reached, taking out the wood, then putting the wood into a constant-temperature constant-humidity box, and adjusting the wood to balance the moisture content for later use under the conditions of 20 ℃ and 60%;
performing microwave treatment on the wood by using tunnel type microwave treatment equipment with a microwave treatment cavity of 0.5m, controlling the microwave power to be 100kW and the transmission speed to be 1.0m/h in the treatment process, and performing air drying and drying after the wood is subjected to microwave treatment until the moisture content is 12%;
s2 preparation of treatment solution
Putting 15g of sodium tungstate dihydrate into a container, adding 0.2L of ethanol, fixing the volume to 0.6L by using distilled water, and then adjusting the pH value to 1.5 by using 95% concentrated sulfuric acid to obtain a treatment solution B;
s3 plasma etching of wood
Horizontally immersing the wood subjected to microwave treatment into the treatment liquid B, conveying the wood into a plasma treatment area at a speed of 2m/min under the action of a guide roller, setting the plasma treatment power to be 4.5kW, transferring the wood into a reaction kettle after treatment is finished, reacting for 7 hours at 95 ℃ after sealing, cooling to room temperature, repeatedly and alternately washing the wood with distilled water and ethanol after taking out, and drying for 20 hours at 60 ℃ to finish the treatment of the wood.
The test method comprises the following steps:
after controlling the water content of the wood samples provided in examples 1 to 3, the control group and comparative examples 1 to 3 to be 45%, placing the wood samples in a die of a hot press preheated to 125 ℃, and performing hot pressing treatment for 30min under the conditions that the temperature is 125 ℃, the compression rate is 40% and the pressure is 20MPa to bend the wood into an arc shape; and taking the bent wood sample with the die from the hot press to send the bent wood sample into a natural air drying room, drying for 7 days, and taking the bent wood sample out of the die to obtain the bent wood.
And (3) testing results:
the wood sample in example 1 had a maximum tortuosity of 1:1.6 and a springback rate of 3.6%; the wood sample in example 2 had a maximum camber of 1:1.5 and a springback value of 3.2%; the wood sample in example 3 had a maximum tortuosity of 1:1.8 and a springback value of 4.0%; the maximum bending degree of the wood sample in the control group is 1:20, and the resilience rate is 20%; the wood sample in comparative example 1 had a maximum tortuosity of 1:15 and a spring back of 13%; the wood sample in comparative example 2 had a maximum bending of 1:8 and a spring back of 15%; the wood sample of comparative example 3 had a maximum bending of 1:10 and a spring back of 6%.
And (4) analyzing results:
according to the test results, the treatment process disclosed by the invention can effectively improve the maximum bending degree of the wood, reduce the resilience rate and obviously improve the plasticity of the wood, so that the wood can better meet the industrial requirements.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention.

Claims (10)

1. A treatment process for improving wood processing plasticity is characterized in that the process method comprises the following steps:
immersing wood after microwave pretreatment into the treatment liquid A and carrying out plasma treatment, immersing the wood into the treatment liquid B after hydrothermal treatment and carrying out plasma treatment, and carrying out hydrothermal reaction;
the treatment fluid A comprises a sulfur source and an antimony source;
the treatment liquid B consists of tungstate and ethanol, and is adjusted to be acidic.
2. The bamboo gluing forming process for improving the gluing strength of bamboo as claimed in claim 1, wherein the microwave pretreatment comprises microwave power of 100kW and transmission speed of 1.0-1.5m/h, and the power is 140 kW.
3. The bamboo gluing forming process for improving the gluing strength of bamboo as claimed in claim 1, wherein the power of the plasma treatment is 4.5-6.0 kW.
4. The bamboo wood gluing forming process for improving the gluing strength of the bamboo wood according to claim 1, wherein the molar ratio of the sulfur source to the antimony source in the treatment liquid A is 1: 2.0-2.3.
5. The bamboo wood gluing forming process for improving the gluing strength of the bamboo wood according to claim 1, wherein polyvinylpyrrolidone is further added into the treatment liquid A, and the addition amount of the polyvinylpyrrolidone is 0.05-0.20% of the mass of the antimony source.
6. The bamboo glue forming process for improving the bamboo gluing strength as claimed in claim 1, wherein the ratio of tungstate to ethanol in the treating solution B is 1:10-15g/mL, and the pH value of the treating solution B is 1.5-2.0.
7. The bamboo wood glue forming process for improving the bamboo wood bonding strength according to claim 1, wherein in the treatment liquid B, the tungstate and the ethanol are mixed and then subjected to constant volume, and distilled water used for constant volume is 2.0-2.5 times of the volume of the ethanol.
8. The bamboo gluing forming process for improving the gluing strength of bamboo as claimed in claim 1, wherein the temperature of the hydrothermal treatment is 180 ℃ and 200 ℃, and the treatment time is 12-20 h.
9. The bamboo wood gluing forming process for improving the gluing strength of bamboo wood according to claim 1, wherein the temperature of the hydrothermal reaction is 95-98 ℃, and the reaction time is 7-10 h.
10. The bamboo gluing forming process for improving the gluing strength of the bamboo as claimed in claim 1, wherein the wood is softened before microwave pretreatment.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102350717A (en) * 2011-10-08 2012-02-15 南京林业大学 Wooden sheet dyeing method for performing pretreatment by using cold plasma
CN104802248A (en) * 2015-05-05 2015-07-29 东北林业大学 Preparation method of wood/WO3 (tungsten trioxide) nano-sheet composite material as well as modification method and application thereof
CN108724392A (en) * 2018-06-07 2018-11-02 中国林业科学研究院木材工业研究所 A kind of preparation method of bending solid wood
CN112356200A (en) * 2020-11-30 2021-02-12 阜南县腾博工艺品有限公司 Processing technology for improving corrosion protection effect of surface carbide layer of wooden handicraft
CN112405744A (en) * 2020-11-30 2021-02-26 阜南县锐发工艺品有限公司 Treatment process for reducing surface burr generation in wood processing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102350717A (en) * 2011-10-08 2012-02-15 南京林业大学 Wooden sheet dyeing method for performing pretreatment by using cold plasma
CN104802248A (en) * 2015-05-05 2015-07-29 东北林业大学 Preparation method of wood/WO3 (tungsten trioxide) nano-sheet composite material as well as modification method and application thereof
CN108724392A (en) * 2018-06-07 2018-11-02 中国林业科学研究院木材工业研究所 A kind of preparation method of bending solid wood
CN112356200A (en) * 2020-11-30 2021-02-12 阜南县腾博工艺品有限公司 Processing technology for improving corrosion protection effect of surface carbide layer of wooden handicraft
CN112405744A (en) * 2020-11-30 2021-02-26 阜南县锐发工艺品有限公司 Treatment process for reducing surface burr generation in wood processing

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