CN114523536B - Treatment process for improving wood processing plasticity - Google Patents

Treatment process for improving wood processing plasticity Download PDF

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Publication number
CN114523536B
CN114523536B CN202210223036.0A CN202210223036A CN114523536B CN 114523536 B CN114523536 B CN 114523536B CN 202210223036 A CN202210223036 A CN 202210223036A CN 114523536 B CN114523536 B CN 114523536B
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wood
treatment
plasticity
treatment liquid
hydrothermal
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CN114523536A (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)
  • Plasma & Fusion (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (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 liquid A after microwave pretreatment and is subjected to plasma treatment, is immersed into a treatment liquid B after hydrothermal treatment and is subjected to plasma treatment, and is subjected to hydrothermal reaction; the treatment liquid A comprises a sulfur source and an antimony source; the treatment liquid B consists of tungstate and ethanol and is regulated to be acidic. According to the invention, the prepared treatment liquid A and the treatment liquid B are used for soaking the wood, plasma treatment is carried out in the soaking process, and hydrothermal treatment and hydrothermal reaction are respectively carried out after the treatment, so that a continuous-phase reticular structure is formed inside the wood, and a lamellar protruding layer is also grown on the surface of the reticular structure, so that the bending degree of the wood in bending is improved, the rebound 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 the plasticity of wood processing.
Background
Wood is a natural material which has wide application and is easy to develop and utilize, is a main raw material for manufacturing wicker, is influenced by the physical and mechanical properties of the wood, and needs to be softened to a certain extent 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 braiding 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 cellulose, the hemicellulose and the lignin. Cellulose and lignin inhibit wood plasticity and flexibility, the crystallization area of the cellulose and lignin promote the reduction of wood toughness and the increase of wood strength, and the cellulose and lignin serve as macromolecular compounds with complex structures, provide higher rigidity, and can form stronger chemical bonds between lignin and other components. The above-mentioned action makes the wood form a stable whole body which is not easy to produce plastic deformation at normal temp.. At present, softening of wood is mainly divided into physical softening and chemical softening, and the common physical or chemical softening method can meet the requirements for part of wood with low requirements on plasticity, but the prior art cannot meet the requirements for part of wood with high requirements on plasticity. For example, for wood with larger size and density, the conventional physical or chemical softening method is carried out on the wood, the bending degree of the wood can only be adjusted within the range of 1:3-1:6, and the rebound rate reaches 5% -10%, so that the plasticity of the wood is general and cannot meet the requirements.
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 is characterized in that wood is immersed into a prepared treatment liquid A after being subjected to microwave pretreatment and is subjected to plasma treatment, is immersed into a prepared treatment liquid B after being subjected to hydrothermal treatment and is subjected to plasma treatment, and the wood with larger size and density can be treated by using the method, so that the flexibility of the treated wood is improved, the rebound rate is reduced, and the plasticity of the wood is enhanced.
The invention is realized by the following technical scheme:
a treatment process for improving the plasticity of wood processing comprises the following steps:
and (3) immersing the wood after microwave pretreatment in the treatment liquid A, performing plasma treatment, immersing the wood in the treatment liquid B after hydrothermal treatment, performing plasma treatment, and performing hydrothermal reaction.
According to the invention, the wood is subjected to microwave treatment, and the energy of high-energy microwaves can cause microscopic damage to the interior of the wood, so that a large number of microscopic 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 timber is soaked in the treatment liquid A and the treatment liquid B in sequence, and plasma treatment is carried out, so that the surface of the timber can be oxidized and etched by utilizing the plasma treatment, the capillary action of the timber on the treatment liquid is improved, the penetration of the treatment liquid into the timber is promoted, and the treatment liquid can be filled in the timber.
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, the agglomeration phenomenon occurs among the antimony sulfide nano particles along with the prolongation of the hydrothermal treatment time, a plurality of net structures grow out 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 treatment liquid A, so that agglomeration among the antimony sulfide crystal nucleus can be avoided, and the antimony sulfide crystal nucleus grows into smaller crystal grains.
According to the invention, after a continuous phase reticular structure is formed in the wood, the wood is soaked in the treatment liquid B again and subjected to hydrothermal reaction, the treatment liquid B filled in the fine interior of the wood is used for growing a basal body by the reticular structure after the hydrothermal reaction, uniformly consistent nano sheets are grown on the surface of the reticular structure, and a large number of nano sheets are formed on the surface of the reticular structure to form lamellar convex layers.
According to the invention, the net structure is formed by constructing the inside of the wood, so that the effect of dispersing stress is achieved, the stress concentration during bending of the wood is reduced, the wood has larger bending degree, and the lamellar nano sheets in the lamellar nano sheets are embedded and inserted when the wood is bent by generating the lamellar protruding layer on the surface of the net structure, so that the net structure is folded, the bending wood is restrained from being restored, and the rebound rate of the wood is reduced.
In a specific embodiment, the wood is further subjected to a softening treatment prior to microwave treatment, wherein the softening treatment is performed by means of a high-temperature hydrothermal treatment.
Through carrying out softening treatment to timber for timber can reach equilibrium moisture content fast in constant temperature and humidity case, has increased the moisture content in the timber, makes timber when carrying out microwave treatment, can produce more heat, thereby has also accelerated the formation of timber inside microcrack.
In a specific embodiment, the temperature of the hydrothermal treatment is preferably 120-180deg.C, the time is 50-120min, and the bath ratio is 1:10-20.
In a specific embodiment, in the high temperature hydrothermal treatment, it is preferable to heat up from room temperature to a set temperature at a rate of 2 to 5 ℃ per minute.
In a specific embodiment, after softening the wood, it is placed in a constant temperature and humidity cabinet and adjusted to an equilibrium moisture content at 20-25 ℃ and 60-65%.
In a specific embodiment, the length of the microwave treatment cavity is preferably 0.5m, the microwave power is 100-140kW, and the transmission speed is 1.0-1.5m/h.
In a specific embodiment, the wood is air dried after microwave treatment to a moisture content of less than 12%.
In a specific embodiment, the molar ratio of the sulfur source to the antimony source in the treatment liquid A is 1:2.0-2.3.
In a specific embodiment, the sulfur source is preferably thioacetamide and the antimony source is potassium antimony tartrate.
In a specific embodiment, polyvinylpyrrolidone is further added into the treatment solution A, wherein the addition amount of polyvinylpyrrolidone is 0.05-0.20% of the mass of the antimony source.
In a specific embodiment, in the treatment solution A, the solvent is deionized water, and the ratio of the deionized water to the potassium antimony tartrate is 1:4.0-8.5mL/g.
In a specific embodiment, the preparation method of the treatment liquid a is preferably as follows:
dissolving 4-10M of potassium antimony tartrate in 0.3-1.5L of deionized water, magnetically stirring for 10-30min, adding 2-10g of polyvinylpyrrolidone after the potassium antimony tartrate is completely dissolved, stirring for 5-15min at 100-160r/min, adding 8-20M of thioacetamide into the mixed solution, magnetically stirring for 20-50min, and obtaining a treatment solution A.
In a specific embodiment, the ratio of tungstate to ethanol in the treatment liquid B is 1:10-15g/mL, and the pH value of the treatment liquid B is 1.5-2.0.
In a specific 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 volume fixing, wherein the volume fixing is performed by using distilled water which is 2.0-2.5 times of the volume of the ethanol.
In a specific embodiment, the preparation method of the treatment liquid B is preferably 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 constant volume to 0.6-2.0L, and then concentrated sulfuric acid with the concentration of 95-98% is used for regulating the pH value to 1.5-2.0, so that the treatment liquid B is obtained.
In a specific embodiment, the power of the plasma treatment is 4.5-6.0kW.
In a specific embodiment, the wood is brought into the plasma treatment zone by means of a re-directing roller during the plasma treatment.
In a specific embodiment, it is preferred that the speed of the guide roll is 2-5m/min.
In a specific embodiment, the temperature of the hydrothermal treatment is preferably 180-200 ℃ and the treatment time is 12-20 hours.
In a specific embodiment, the temperature of the hydrothermal reaction is preferably 95-98℃and the reaction time is 7-10 hours.
In a specific embodiment, the wood is also subjected to a drying treatment after the hydrothermal reaction.
In a specific embodiment, the drying temperature is preferably 60-80℃and the drying time is 20-25h.
Compared with the prior art, the invention has the following advantages:
according to the invention, the prepared treatment liquid A and the treatment liquid B are used for soaking the wood, plasma treatment is carried out in the soaking process, and hydrothermal treatment and hydrothermal reaction are respectively carried out after the treatment, so that a continuous-phase net structure is formed inside the wood, and a lamellar protruding layer is also grown on the surface of the net structure, so that the bending degree of the wood during bending is improved, the rebound rate is reduced, the wood with larger size and density can have better plasticity, and the wood can better meet industrial requirements.
Detailed Description
Example 1
1. Selection of wood
Selecting larch with density of 0.59g/cm 3 End face hardness 335kg/cm 2 This was processed into a 400mm by 100mm by 30mm veneer.
2. Plastic treatment process for wood
S1, pretreatment of wood
Setting the high-temperature hydrothermal treatment temperature to 120 ℃ for 50min, cleaning the surface of the wood at room temperature, putting the wood into an electric heating digester, heating to the set temperature at the speed of 2 ℃/min, preserving heat and timing, releasing pressure and cooling after the set time is reached, taking out the wood, putting the wood into a constant-temperature constant-humidity box, and adjusting the wood to balance the water content for standby at 20 ℃ and 60%;
carrying out microwave treatment on the wood by using tunnel type microwave treatment equipment with the length of 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 carrying out air drying after the wood is subjected to microwave treatment until the moisture content is 12%;
s2, preparation of treatment fluid
Dissolving 4M potassium antimony tartrate in 0.3L deionized water, magnetically stirring for 10min, adding 2g polyvinylpyrrolidone after the potassium antimony tartrate is completely dissolved, stirring for 5min at 100r/min, adding 8M thioacetamide into the mixed solution, magnetically stirring for 20min to obtain a treatment solution A;
15g of sodium tungstate dihydrate is placed in a container, 0.2L of ethanol is added, distilled water is used for constant volume to 0.6L, and then 95% concentrated sulfuric acid is used for regulating the pH value to 1.5, so that a treatment liquid B is obtained;
s3, plasma etching of wood
Immersing the wood subjected to microwave treatment into the treatment liquid A horizontally, feeding 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 finishing the treatment, sealing the wood, placing the wood into a 180 ℃ oven, heating the wood at a constant temperature for 12 hours, cooling the wood to room temperature after finishing the reaction, taking out the wood, and washing the wood with deionized water for later use;
immersing the standby wood into the treatment liquid B, feeding the standby 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 standby wood into a reaction kettle after finishing treatment, reacting for 7 hours at 95 ℃ after sealing, cooling to room temperature, taking out, repeatedly and alternately washing with 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 larch with density of 0.59g/cm 3 End face hardness 335kg/cm 2 This was processed into a 400mm by 100mm by 30mm veneer.
2. Plastic treatment process for wood
S1, pretreatment of wood
Setting the high-temperature hydrothermal treatment temperature at 150 ℃ for 80min, cleaning the surface of the wood at room temperature with a bath ratio of 1:15, putting the wood into an electric heating digester, heating to the set temperature at a speed of 3 ℃/min, preserving heat and timing, releasing pressure and cooling after the set time is reached, taking out the wood, putting the wood into a constant-temperature constant-humidity box, and adjusting to balance the water content for standby at 23 ℃ and 62%;
carrying out microwave treatment on the wood by using tunnel type microwave treatment equipment with the length of a microwave treatment cavity of 0.5m, controlling the microwave power to be 120kW and the transmission speed to be 1.2m/h in the treatment process, and carrying out air drying after the wood is subjected to microwave treatment until the moisture content is 10%;
s2, preparation of treatment fluid
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 150r/min, adding 12M thioacetamide into the mixed solution, 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
Immersing the wood subjected to microwave treatment into the treatment liquid A horizontally, feeding 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 finishing the treatment, sealing the wood, placing the wood into a baking oven at 190 ℃, heating the wood at a constant temperature for 18 hours, cooling the wood to room temperature after finishing the reaction, taking out the wood, and washing the wood with deionized water for later use;
immersing the standby wood into the treatment liquid B, feeding the standby 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 standby wood into a reaction kettle after finishing treatment, reacting for 8 hours at 96 ℃ after sealing, cooling to room temperature, taking out, repeatedly and alternately washing with 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 larch with density of 0.59g/cm 3 End face hardness 335kg/cm 2 This was processed into a 400mm by 100mm by 30mm veneer.
2. Plastic treatment process for wood
S1, pretreatment of wood
Setting the high-temperature hydrothermal treatment temperature at 180 ℃ for 120min, cleaning the surface of the wood at room temperature with a bath ratio of 1:20, putting the wood into an electric heating digester, heating to the set temperature at a speed of 5 ℃/min, preserving heat and timing, releasing pressure and cooling after the set time is reached, taking out the wood, putting the wood into a constant-temperature constant-humidity box, and adjusting to balance the water content for standby at 25 ℃ and 65%;
carrying out microwave treatment on the wood by using tunnel type microwave treatment equipment with the length of a microwave treatment cavity of 0.5m, controlling the microwave power to be 140kW and the transmission speed to be 1.5m/h in the treatment process, and carrying out air drying after the wood is subjected to microwave treatment until the moisture content is 10%;
s2, preparation of treatment fluid
Dissolving 10M potassium antimony tartrate in 1.5L deionized water, magnetically stirring for 30min, adding 10g polyvinylpyrrolidone after completely dissolving, stirring for 15min at 160r/min, adding 20M thioacetamide into the mixed solution, magnetically stirring for 50min to obtain a treatment solution A;
placing 50g of sodium tungstate dihydrate into 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
Immersing the wood subjected to microwave treatment into the treatment liquid A horizontally, feeding 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 finishing the treatment, sealing the wood, placing the wood into a baking oven at 200 ℃, heating the wood at a constant temperature for 20 hours, cooling the wood to room temperature after finishing the reaction, taking out the wood, and washing the wood with deionized water for later use;
immersing the standby wood into the treatment liquid B, feeding the standby 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 standby wood into a reaction kettle after finishing treatment, reacting for 10 hours at 98 ℃ after sealing, cooling to room temperature, taking out, repeatedly and alternately washing with distilled water and ethanol, and drying for 25 hours at 80 ℃ to finish the treatment of the wood.
Control group:
placing the timber in a constant temperature water bath kettle at 100 ℃ for stewing for 1h, and fully softening the timber.
Comparative example 1:
the timber is only subjected to high temperature hydrothermal treatment and microwave treatment, and the specific operation is as follows:
setting the high-temperature hydrothermal treatment temperature to 120 ℃ for 50min, cleaning the surface of the wood at room temperature, putting the wood into an electric heating digester, heating to the set temperature at the speed of 2 ℃/min, preserving heat and timing, releasing pressure and cooling after the set time is reached, taking out the wood, putting the wood into a constant-temperature constant-humidity box, and adjusting the wood to balance the water content for standby at 20 ℃ and 60%;
and (3) carrying out microwave treatment on the wood by using tunnel type microwave treatment equipment with the length of a microwave treatment cavity of 0.5m, wherein in the treatment process, the microwave power is controlled to be 100kW, the transmission speed is controlled to be 1.0m/h, and after the wood is subjected to microwave treatment, the wood is subjected to air drying until the moisture content is 12%.
Comparative example 2:
compared with the embodiment 1, the treatment liquid B is omitted,
the specific operation is as follows:
s1, pretreatment of wood
Setting the high-temperature hydrothermal treatment temperature to 120 ℃ for 50min, cleaning the surface of the wood at room temperature, putting the wood into an electric heating digester, heating to the set temperature at the speed of 2 ℃/min, preserving heat and timing, releasing pressure and cooling after the set time is reached, taking out the wood, putting the wood into a constant-temperature constant-humidity box, and adjusting the wood to balance the water content for standby at 20 ℃ and 60%;
carrying out microwave treatment on the wood by using tunnel type microwave treatment equipment with the length of 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 carrying out air drying after the wood is subjected to microwave treatment until the moisture content is 12%;
s2, preparation of treatment fluid
Dissolving 4M potassium antimony tartrate in 0.3L deionized water, magnetically stirring for 10min, adding 2g polyvinylpyrrolidone after the potassium antimony tartrate is completely dissolved, stirring for 5min at 100r/min, adding 8M thioacetamide into the mixed solution, magnetically stirring for 20min to obtain a treatment solution A;
s3, plasma etching of wood
Immersing the wood subjected to microwave treatment into the treatment liquid A horizontally, feeding 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 finishing treatment, sealing the wood, placing the wood into a 180 ℃ oven, heating the wood at a constant temperature for 12 hours, cooling the wood to room temperature after finishing the reaction, 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:
compared with the example 1, the treatment liquid A is omitted,
the specific operation is as follows:
s1, pretreatment of wood
Setting the high-temperature hydrothermal treatment temperature to 120 ℃ for 50min, cleaning the surface of the wood at room temperature, putting the wood into an electric heating digester, heating to the set temperature at the speed of 2 ℃/min, preserving heat and timing, releasing pressure and cooling after the set time is reached, taking out the wood, putting the wood into a constant-temperature constant-humidity box, and adjusting the wood to balance the water content for standby at 20 ℃ and 60%;
carrying out microwave treatment on the wood by using tunnel type microwave treatment equipment with the length of 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 carrying out air drying after the wood is subjected to microwave treatment until the moisture content is 12%;
s2, preparation of treatment fluid
15g of sodium tungstate dihydrate is placed in a container, 0.2L of ethanol is added, distilled water is used for constant volume to 0.6L, and then 95% concentrated sulfuric acid is used for regulating the pH value to 1.5, so that a treatment liquid B is obtained;
s3, plasma etching of wood
Immersing the wood subjected to microwave treatment into the treatment liquid B horizontally, feeding 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 finishing the treatment, reacting for 7 hours at 95 ℃ after sealing, cooling to room temperature, taking out, repeatedly and alternately washing with distilled water and ethanol, and drying for 20 hours at 60 ℃ to finish the treatment of the wood.
The testing method comprises the following steps:
after the moisture contents of the wood samples provided in examples 1 to 3, control groups and comparative examples 1 to 3 were controlled to 45%, they were placed in a mold of a hot press preheated to 125 ℃, and heat-pressed for 30 minutes under conditions of a temperature of 125 ℃, a compression ratio of 40% and a pressure of 20MPa, to bend the wood into an arc shape; and taking the bent wood sample with the die out of the hot press to be sent 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.
Test results:
the wood sample of example 1 had a maximum tortuosity of 1:1.6 and a rebound of 3.6%; the wood sample of example 2 had a maximum tortuosity of 1:1.5 and a rebound of 3.2%; the wood sample of example 3 had a maximum tortuosity of 1:1.8 and a rebound of 4.0%; wood samples in the control group had a maximum tortuosity of 1:20 and a rebound rate of 20%; the wood sample in comparative example 1 had a maximum tortuosity of 1:15 and a rebound rate of 13%; the wood sample in comparative example 2 had a maximum tortuosity of 1:8 and a rebound rate of 15%; the wood sample of comparative example 3 had a maximum tortuosity of 1:10 and a rebound of 6%.
Analysis of 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 rebound rate, and obviously improve the plasticity of the wood, so that the wood can better meet the industrial requirements.
The foregoing is merely a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any modification or substitution that is not subjected to the inventive work should be covered in the scope of the present invention.

Claims (6)

1. A treatment process for improving the plasticity of wood processing is characterized by comprising the following steps:
immersing wood after microwave pretreatment in the treatment liquid A and performing plasma treatment, immersing the wood into the treatment liquid B after hydrothermal treatment and performing plasma treatment, and performing hydrothermal reaction;
the treatment fluid A comprises a sulfur source and an antimony source, wherein the molar ratio of the sulfur source to the antimony source is 1:2.0-2.3, the antimony source is potassium antimonate, and the sulfur source is thioacetamide; the treatment liquid A is also added with polyvinylpyrrolidone, and the addition amount of the polyvinylpyrrolidone is 0.05-0.20% of the mass of the antimony source;
the treatment solution B consists of tungstate and ethanol, the ratio of the tungstate to the ethanol is 1:10-15g/mL, the pH value of the treatment solution B is 1.5-2.0, the volume of the treatment solution B is required to be fixed after the tungstate and the ethanol are mixed, and distilled water used for the volume fixing is 2.0-2.5 times of the volume of the ethanol.
2. A treatment process for improving the plasticity of wood working as claimed in claim 1, wherein in the microwave pretreatment, the microwave power is 100-140kW and the transmission speed is 1.0-1.5m/h.
3. A treatment process for improving the plasticity of wood working as claimed in claim 1, wherein the power of the plasma treatment is 4.5-6.0kW.
4. A treatment process for improving the plasticity of wood working according to claim 1, wherein the hydrothermal treatment is carried out at a temperature of 180-200 ℃ for a treatment time of 12-20 hours.
5. A treatment process for improving the plasticity of wood processing according to claim 1, wherein the hydrothermal reaction is carried out at a temperature of 95-98 ℃ for a reaction time of 7-10 hours.
6. A treatment process for improving the plasticity of wood processing according to claim 1, wherein the wood is further subjected to a softening treatment before the microwave pretreatment.
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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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