CN112497390A - Preparation method of anticorrosion and anti-cracking wood - Google Patents
Preparation method of anticorrosion and anti-cracking wood Download PDFInfo
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- CN112497390A CN112497390A CN202011363734.8A CN202011363734A CN112497390A CN 112497390 A CN112497390 A CN 112497390A CN 202011363734 A CN202011363734 A CN 202011363734A CN 112497390 A CN112497390 A CN 112497390A
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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
- B27K5/001—Heating
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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
- B27K3/02—Processes; Apparatus
- B27K3/08—Impregnating by pressure, e.g. vacuum impregnation
- B27K3/10—Apparatus
-
- 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
- B27K2240/00—Purpose of the treatment
- B27K2240/20—Removing fungi, molds or insects
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
A preparation method of anticorrosion and anti-cracking wood belongs to the technical field of wood processing. The method comprises the following steps: peeling the log, sawing into plates, and drying; putting the dried wood into a container for corrosion prevention and cracking prevention; carrying out vacuum pressurization treatment on the wood; the wood is dried again. The preparation method is simple and environment-friendly, the prepared wood has good anticorrosion and anti-cracking effects, the wood is subjected to superheated steam treatment, then the wood is subjected to anticorrosion and anti-cracking treatment, the chitosan, the polyvinyl alcohol, the sodium alginate, the gelatin, the polyethylene glycol and the water-soluble phenolic resin cross-linking agent are subjected to modification treatment, the combined synergistic effect is achieved, then the wood is subjected to vacuum pressurization treatment and then dried, the adhesive force of the anticorrosion and anti-cracking finishing agent can be added, and meanwhile, the cracking of the wood is delayed.
Description
Technical Field
The invention belongs to the technical field of wood processing, and particularly relates to a preparation method of anticorrosion and anti-cracking wood.
Background
The wood is important production data and living data indispensable to national construction and people's life, and the wood is important material meeting people's daily life needs and is also a special resource closely related to ecological environment. The wood is the only renewable resource, and has the unique advantages of light weight, high strength, heat preservation and insulation, sound absorption and insulation, shock resistance, ultraviolet absorption, beautiful appearance, nature and the like which are incomparable with other materials. However, wood also has its disadvantages, being perishable, susceptible to drying, and having a long growth cycle.
The wood is naturally dried in the atmosphere, the water on the surface is quickly evaporated, the water content is firstly reduced, and the surface begins to be dried and shrunk. But the moisture content of the inner layer is still high, and no drying shrinkage occurs, so that the outer layer shrinks, the inner layer does not shrink, internal stress of external tension and internal compression is generated, and when the tensile stress exceeds the tensile strength limit of wood, the wood tissue is damaged, and cracking is generated.
One of the important methods for saving the wood is to implement a wood protection technology, improve the decay resistance, discoloration resistance and moth-proof capability of the wood through preservative treatment, and prolong the service life of the wood, thereby achieving the purposes of saving wood resources and reducing the forest cutting amount.
At present, wood preservatives such as ACQ, copper azole, CCA and the like which are commonly used in the market contain certain substances harmful to human bodies. Due to the inherent disadvantages of traditional wood preservatives and their unreasonable use, wood preservatives have generated a series of public nuisance problems in use, such as environmental pollution, potential toxicity to living beings, etc., which have attracted general attention.
Disclosure of Invention
The technical problem to be solved is as follows: aiming at the technical problems, the invention provides the preparation method of the anticorrosion and anti-cracking wood, which has the advantages of simple preparation method, convenient operation, good anticorrosion and anti-cracking effects of the prepared product and the like.
The technical scheme is as follows: a preparation method of antiseptic anti-cracking wood, which comprises the following steps:
firstly, peeling a log, sawing the log into plates, then putting the plates into a reactor, heating the plates to 60 ℃ for 10-20 min, introducing superheated steam into the reactor, wherein the temperature of the superheated steam is 130-145 ℃, heating the plates for 1.5-3 h, and after the wood is cooled to room temperature, placing the wood in a ventilation place for drying for 4-6 days;
putting the dried wood into a container, adding a treatment solution to immerse the wood into the treatment solution, wherein the preparation process of the treatment solution is as follows: taking 80-100 parts by mass of 1wt.% acetic acid, 10-13 parts by mass of chitosan, 2-6 parts by mass of polyvinyl alcohol and 1-3 parts by mass of sodium alginate, stirring in a constant-temperature water bath at the temperature of 80-100 ℃, then adding 2-3 parts by mass of gelatin, 5-6 parts by mass of polyethylene glycol and 1-2 parts by mass of a water-soluble phenolic resin crosslinking agent, fully stirring uniformly, reacting at the temperature of 55-60 ℃ for 1 hour at constant temperature, and cooling to room temperature;
step three, vacuumizing the container in the step two to 0.1MPa, finishing vacuum treatment when no bubbles are generated on the surface of the wood block, then pressurizing, keeping the pressure at 0.45-0.55 MPa, maintaining the pressure for 2-3 hours, and taking out the wood;
and fourthly, drying the wood again, controlling the water content of the wood to be 8-10%, then placing the wood to a ventilation position for 4-5 days, slicing and trimming to form a flat wood board.
Preferably, in the first step, the log is peeled and then sawed into boards, then the boards are placed into a reactor and heated to 60 ℃, superheated steam is introduced into the reactor after 15min, the temperature of the superheated steam is 140 ℃, the heating time is 2h, and the boards are placed in a ventilated place and dried for 5 days after the wood is cooled to room temperature.
Preferably, in the second step, the dried wood is put into a container, and the treatment solution is added to immerse the wood into the treatment solution, wherein the preparation process of the treatment solution is as follows: according to the mass parts, 90 parts of 1wt.% acetic acid, 12 parts of chitosan, 4 parts of polyvinyl alcohol and 2 parts of sodium alginate are stirred in a constant-temperature water bath at the temperature of 95 ℃, then 2.5 parts of gelatin, 5.2 parts of polyethylene glycol and 1 part of water-soluble phenolic resin cross-linking agent are added, the mixture is fully stirred uniformly and then reacts at the constant temperature of 57 ℃ for 1 hour, and the mixture is cooled to the room temperature.
Preferably, in the third step, the container in the second step is vacuumized to 0.1MPa, the vacuum treatment is finished when no air bubbles are generated on the surface of the wood block, then the pressure is increased, the pressure is kept at 0.5MPa, the pressure is kept for 2.5h, and the wood is taken out.
Preferably, in the fourth step, the wood is dried again, the moisture content of the wood is controlled to be 8%, and then the wood is placed in a ventilated place for 5 days, and then is sliced and trimmed to form a flat wood board.
Has the advantages that: the preparation method is simple and environment-friendly, the prepared wood has good anticorrosion and anti-cracking effects, the wood is subjected to superheated steam treatment, then the wood is subjected to anticorrosion and anti-cracking treatment, the chitosan, the polyvinyl alcohol, the sodium alginate, the gelatin, the polyethylene glycol and the water-soluble phenolic resin cross-linking agent are subjected to modification treatment, the combined synergistic effect is achieved, then the wood is subjected to vacuum pressurization treatment and then dried, the adhesive force of the anticorrosion and anti-cracking finishing agent can be added, and meanwhile, the cracking of the wood is delayed.
Detailed Description
The invention is further described with reference to specific examples. In the embodiment of the specification, the raw wood is poplar.
Example 1
A preparation method of antiseptic anti-cracking wood, which comprises the following steps:
firstly, peeling a log, sawing the log into plates, then putting the plates into a reactor, heating the plates to 60 ℃, introducing superheated steam into the reactor after 10min, wherein the temperature of the superheated steam is 130 ℃, heating the plates for 1.5 h, and after the wood is cooled to room temperature, placing the wood in a ventilated place for drying for 4 days;
putting the dried wood into a container, adding a treatment solution to immerse the wood into the treatment solution, wherein the preparation process of the treatment solution is as follows: taking 80 parts by mass of 1wt.% acetic acid, 10 parts by mass of chitosan, 2 parts by mass of polyvinyl alcohol and 1 part by mass of sodium alginate, stirring in a constant-temperature water bath at the temperature of 80 ℃, then adding 2 parts by mass of gelatin, 5 parts by mass of polyethylene glycol and 1 part by mass of water-soluble phenolic resin cross-linking agent, fully stirring uniformly, reacting at the temperature of 55 ℃ for 1 hour at constant temperature, and cooling to room temperature;
step three, vacuumizing the container in the step two to 0.1MPa, finishing vacuum treatment when no bubbles are generated on the surface of the wood block, then pressurizing, keeping the pressure at 0.45MPa, maintaining the pressure for 2 hours, and taking out the wood;
and fourthly, drying the wood again, controlling the water content of the wood to be 8%, and then slicing and trimming the wood after the wood is placed in a ventilated place for 4 days to form a flat wood board.
Example 2
A preparation method of antiseptic anti-cracking wood, which comprises the following steps:
firstly, peeling a log, sawing the log into plates, then putting the plates into a reactor, heating the plates to 60 ℃, introducing superheated steam into the reactor after 20min, wherein the temperature of the superheated steam is 145 ℃, heating the plates for 3h, and after the wood is cooled to room temperature, putting the wood in a ventilated place for drying for 6 days;
putting the dried wood into a container, adding a treatment solution to immerse the wood into the treatment solution, wherein the preparation process of the treatment solution is as follows: taking 100 parts by mass of 1wt.% acetic acid, 13 parts by mass of chitosan, 6 parts by mass of polyvinyl alcohol and 3 parts by mass of sodium alginate, stirring in a constant-temperature water bath at the temperature of 100 ℃, then adding 3 parts by mass of gelatin, 6 parts by mass of polyethylene glycol and 2 parts by mass of water-soluble phenolic resin cross-linking agent, fully stirring uniformly, reacting at the temperature of 60 ℃ for 1 hour at constant temperature, and cooling to room temperature;
step three, vacuumizing the container in the step two to 0.1MPa, finishing vacuum treatment when no bubbles are generated on the surface of the wood block, then pressurizing, keeping the pressure at 0.55MPa, maintaining the pressure for 3 hours, and taking out the wood;
and fourthly, drying the wood again, controlling the water content of the wood to be 10%, and then slicing and trimming the wood after the wood is placed in a ventilated place for 5 days to form a flat wood board.
Example 3
A preparation method of antiseptic anti-cracking wood, which comprises the following steps:
firstly, peeling a log, sawing the log into plates, then putting the plates into a reactor, heating the plates to 60 ℃, introducing superheated steam into the reactor after 15min, wherein the temperature of the superheated steam is 140 ℃, heating the plates for 2h, and after the wood is cooled to room temperature, putting the wood in a ventilated place for drying for 5 days;
putting the dried wood into a container, adding a treatment solution to immerse the wood into the treatment solution, wherein the preparation process of the treatment solution is as follows: according to the mass parts, 90 parts of 1wt.% acetic acid, 12 parts of chitosan, 4 parts of polyvinyl alcohol and 2 parts of sodium alginate are taken, stirred in a constant-temperature water bath at the temperature of 95 ℃, then added with 2.5 parts of gelatin, 5.2 parts of polyethylene glycol and 1 part of water-soluble phenolic resin cross-linking agent, fully and uniformly stirred, reacted at the constant temperature of 57 ℃ for 1 hour, and cooled to the room temperature;
step three, vacuumizing the container in the step two to 0.1MPa, finishing vacuum treatment when no bubbles are generated on the surface of the wood block, then pressurizing, keeping the pressure at 0.5MPa, maintaining the pressure for 2.5 hours, and taking out the wood;
and fourthly, drying the wood again, controlling the water content of the wood to be 8%, then placing the wood to a ventilated place for 5 days, slicing and trimming the wood to form a flat wood board.
Reference is made to forestry standard LY/T1283-1998 laboratory method for toxicity of wood preservative on decay fungi and national standard GB/T13942.1-2009 laboratory method for natural durability of wood.
Add to a 500mL wide-mouth flask: 150g of cleaned dry river sand (20-30 meshes), 15g of poplar sapwood sawdust (20-30 meshes), 8.5g of corn powder and 1g of brown sugar are stirred flatly, three pieces of wood are placed on the surface of the cleaned dry river sand, 100mL of maltose liquid is slowly added into the bottle, then the bottle mouth is tightly wrapped with waterproof paper, the bottle is placed into a high-pressure steam sterilizer for sterilization for 1 hour, then the bottle is taken out, and is placed on an ultra-clean workbench for cooling and then is inoculated with experimental bacteria. Culturing test strains (white rot fungi, brown rot fungi and blue-stain fungi), picking out the fungus blocks with vigorous growth by using an inoculating loop after the test strains are cultured, placing the fungus blocks on a river sand culture medium between wood feeders, sealing the culture bottle mouth, and then placing the fungus blocks in a culture box with the temperature of 28 soil and the temperature of 2 ℃ and the relative humidity of more than 75 percent for culture. After hyphae grow over the surface of the feeding wood, the treated test piece can be put into the feeding wood for indoor corrosion resistance experiment. Culturing test strains, picking the vigorously growing bacterium blocks with an inoculating loop, placing the bacterium blocks on a river sand culture medium between feeding woods after the test strains are cultured, sealing the culture bottle mouth, and then placing the bacterium blocks in a bacterium culturing box with the temperature of 28 soil and the temperature of 2 ℃ and the relative humidity of more than 75% for culturing. After the hyphae overgrow the surface of the feeding wood, the treated wood prepared in the embodiments 1 to 3 can be put into the feeding wood for indoor decay resistance experiments. After 3 months of decay, the test piece is taken out, the indoor decay resistance of the treated material is evaluated according to the quality loss rate of the wood, the indoor decay resistance of the wood is evaluated according to the natural decay resistance grade standard of LY/T1283-1998 toxicity laboratory method of wood preservative for decay fungi, finally the measured decay resistance grade is I grade, and the weight loss rates of the products in examples 1-3 are 8%, 9% and 6% respectively.
Claims (5)
1. The preparation method of the anticorrosion anti-cracking wood is characterized by comprising the following steps:
firstly, peeling a log, sawing the log into plates, then putting the plates into a reactor, heating the plates to 60 ℃ for 10-20 min, introducing superheated steam into the reactor, wherein the temperature of the superheated steam is 130-145 ℃, heating the plates for 1.5-3 h, and after the wood is cooled to room temperature, placing the wood in a ventilation place for drying for 4-6 days;
putting the dried wood into a container, adding a treatment solution to immerse the wood into the treatment solution, wherein the preparation process of the treatment solution is as follows: taking 80-100 parts by mass of 1wt.% acetic acid, 10-13 parts by mass of chitosan, 2-6 parts by mass of polyvinyl alcohol and 1-3 parts by mass of sodium alginate, stirring in a constant-temperature water bath at the temperature of 80-100 ℃, then adding 2-3 parts by mass of gelatin, 5-6 parts by mass of polyethylene glycol and 1-2 parts by mass of a water-soluble phenolic resin crosslinking agent, fully stirring uniformly, reacting at the temperature of 55-60 ℃ for 1 hour at constant temperature, and cooling to room temperature;
step three, vacuumizing the container in the step two to 0.1MPa, finishing vacuum treatment when no bubbles are generated on the surface of the wood block, then pressurizing, keeping the pressure at 0.45-0.55 MPa, maintaining the pressure for 2-3 hours, and taking out the wood;
and fourthly, drying the wood again, controlling the water content of the wood to be 8-10%, then placing the wood to a ventilation position for 4-5 days, slicing and trimming to form a flat wood board.
2. The method for preparing the anticorrosion and crack-resistant wood according to claim 1, wherein in the first step, the raw wood is peeled and then sawed into boards, then the boards are placed into a reactor and heated to 60 ℃ for 15min, then superheated steam is introduced into the reactor, the temperature of the superheated steam is 140 ℃, the heating time is 2h, and after the wood is cooled to room temperature, the boards are placed in a ventilation place and dried for 5 days.
3. The method for preparing the anticorrosion and anti-cracking wood according to claim 1, wherein in the second step, the dried wood is put into a container, the treatment liquid is added, so that the wood is immersed into the treatment liquid, and the preparation process of the treatment liquid is as follows: according to the mass parts, 90 parts of 1wt.% acetic acid, 12 parts of chitosan, 4 parts of polyvinyl alcohol and 2 parts of sodium alginate are stirred in a constant-temperature water bath at the temperature of 95 ℃, then 2.5 parts of gelatin, 5.2 parts of polyethylene glycol and 1 part of water-soluble phenolic resin cross-linking agent are added, the mixture is fully stirred uniformly and then reacts at the constant temperature of 57 ℃ for 1 hour, and the mixture is cooled to the room temperature.
4. The method for preparing anticorrosion and cracking-resistant wood according to claim 1, wherein in the third step, the container in the second step is vacuumized to 0.1MPa, the vacuum treatment is finished when no air bubbles are generated on the surface of the wood block, then the wood block is pressurized, the pressure is maintained at 0.5MPa, the pressure is maintained for 2.5h, and the wood block is taken out.
5. The method for preparing the anticorrosion anti-cracking wood according to the claim 1, wherein the wood is dried again in the fourth step, the moisture content of the wood is controlled to be 8%, and then the wood is put to a ventilated place for 5 days, sliced and trimmed to form a flat wood board.
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| CN202011363734.8A CN112497390A (en) | 2020-11-28 | 2020-11-28 | Preparation method of anticorrosion and anti-cracking wood |
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| CN202011363734.8A CN112497390A (en) | 2020-11-28 | 2020-11-28 | Preparation method of anticorrosion and anti-cracking wood |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115488982A (en) * | 2022-10-27 | 2022-12-20 | 滁州市吉事达家具制造有限公司 | Anticorrosion and mothproof treatment method for manufacturing solid wood board |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115488982A (en) * | 2022-10-27 | 2022-12-20 | 滁州市吉事达家具制造有限公司 | Anticorrosion and mothproof treatment method for manufacturing solid wood board |
| CN115488982B (en) * | 2022-10-27 | 2023-04-07 | 滁州市吉事达家具制造有限公司 | Anticorrosion and mothproof treatment method for manufacturing solid wood board |
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