CN114505935A - Preparation method of multifunctional micro-nano structure modified wood - Google Patents
Preparation method of multifunctional micro-nano structure modified wood Download PDFInfo
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- CN114505935A CN114505935A CN202011276433.1A CN202011276433A CN114505935A CN 114505935 A CN114505935 A CN 114505935A CN 202011276433 A CN202011276433 A CN 202011276433A CN 114505935 A CN114505935 A CN 114505935A
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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
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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
- B27K3/0207—Pretreatment of wood before impregnation
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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
- B27K3/0207—Pretreatment of wood before impregnation
- B27K3/0214—Drying
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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
- B27K3/16—Inorganic impregnating agents
- B27K3/18—Compounds of alkaline earth metals
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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
- B27K3/16—Inorganic impregnating agents
- B27K3/20—Compounds of alkali metals or ammonium
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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
- B27K3/16—Inorganic impregnating agents
- B27K3/32—Mixtures of different inorganic impregnating agents
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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
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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
- 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
- B27K5/0065—Ultrasonic treatment
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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
- B27K5/04—Combined bleaching or impregnating and drying of wood
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
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- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses a preparation method of multifunctional micro-nano structure modified wood, wherein a modified solution A comprises the following components in parts by weight: 0.1-5 parts of silane coupling agent, 1-20 parts of sodium silicate, 1-50 parts of furfuryl alcohol, 0.1-5 parts of catalyst and 100 parts of deionized water, wherein after the wood board is soaked in the soaking tank for a period of time, the modified solution A is absorbed by the wood board, a proper amount of modified solution B is added into the soaking tank, and high-temperature drying is performed at a later stage, so that the modified solution absorbed to the cell wall and the cell gap of the wood is promoted to perform a crosslinking reaction with hydroxyl and carboxyl on the surface of lignocellulose of the wood to generate a micro-nano net structure, the mechanical structure of the wood is changed, and the hardness, the elastic modulus and the bending strength of the modified wood are obviously improved.
Description
Technical Field
The invention relates to the technical field of wood modification, in particular to a preparation method of multifunctional micro-nano structure modified wood.
Background
With the continuous enhancement of the protection of natural forests, the cutting of natural commercial forests is forbidden and the contraction of international wood import channels, the forest cutting is rapidly changed from natural forests to artificial forests, and the artificial forests become the main raw materials of the wood industry in China gradually. However, artificially fast-growing wood, such as poplar, eucalyptus, fir, pine, willow, and peach heart, is difficult to meet the requirements of high-end wood products due to its soft material, low strength, and easy deformation, and is not efficiently utilized. In order to realize effective allocation of artificial forest wood resources, the modification of artificial forest wood is more and more important. The key point of wood modification in China in the future is still to resist the high-grade wood, improve the utilization rate of the wood in the aspects of improving the density and the strength of the wood, improving the dimensional stability of the wood and the like, and prolong the service life of the wood.
The wood resource material contains abundant polar hydroxyl groups, and the volume of the wood resource material can swell or shrink due to dryness when water enters or is separated out. The expansion and contraction are anisotropic, so that the geometric instability of the woody resource material can be caused; the swelling and shrinking unevenness may cause defects such as cracking and warping of the woody resource material. In order to overcome the obstacles brought by wet swelling and dry shrinkage to the use of wood resource materials, the wood can be treated by various physical and chemical means, so that the wood has better performances, such as wear resistance, high elasticity, bending strength and the like, and the service life of the wood is prolonged.
The modified wood is a modified wood with excellent performance, which is a development trend of wood modification technology, by adopting a modifier to react with components in a wood cell wall to form a firm chemical bond combined interface and directionally thickening the wood cell wall, so that the physical and mechanical properties of the wood are obviously improved. The mechanical properties of the modified wood are different according to the formula of the modified solution and the change of the treatment process. In the wood modification method disclosed in application number CN201811252454.2, the main components of the modifier are furfuryl alcohol and polyethylene as organic modifiers, which improves the problem of high brittleness of furfuryl alcohol modified wood. Application No. 201911293129.5 proposes an inorganic modifier, which is introduced into one or more of silica sol, sodium silicate and potassium silicate solution as modifier component A, Ca (OH)2Solution, saturated CaCl2 solution and saturationOne or more of Ca (NO3)2 solution is used as modifier component B, and the wood performance is improved through the reaction of the mixed solution A and the mixed solution B. Application No. 201811069590.8 proposes that the modified wood is prepared with modifier comprising organic and inorganic materials, polyvinyl alcohol, sodium silicate, silica, magnesia, alumina, zinc oxide and aluminum silicate water, and has improved mechanical performance.
However, although the mechanical properties and durability of the modified wood are improved compared with those of the raw wood, the modified wood still expands and deforms to a certain extent when exposed to a high-temperature and high-humidity environment for a long time, and the service life of the modified wood is affected. Currently, the general solution to this problem is to coat the surface of the modified wood with a water-resistant coating.
Aiming at the problems, the invention provides a preparation method of multifunctional micro-nano structure modified wood.
Disclosure of Invention
The invention aims to provide a preparation method of multifunctional micro-nano structure modified wood, which is characterized in that in the soaking process, the soaking tank is pressurized or the pressure is changed, and the modified solution consisting of different parts by weight is arranged, so that the performance of the modified wood is better, and the problems in the background art are solved.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of multifunctional micro-nano structure modified wood comprises the following steps:
s01: preparing modified solutions A and B;
s02: placing the wood board in the modified solution A, heating, pressurizing and soaking under the ultrasonic condition;
s03: emptying the S02 soak solution, and adding a proper amount of modified solution B;
s04: the soaked logs are pressed, dried and shaped.
Further, the modified solution a in step S01 includes the following components in parts by weight: 0.1-5 parts of silane coupling agent, 1-20 parts of sodium silicate, 1-50 parts of furfuryl alcohol, 0.1-5 parts of catalyst and 100 parts of deionized water.
Further, one formulation of the modified solution B in step S01 is: 0.1-5 parts of stabilizer and 100 parts of deionized water.
Further, the silane coupling agent of the present invention is one or more of tetraethoxysilane, tetramethoxysilane, methyltriethoxysilane, ethyltriethoxysilane, propyltriethoxysilane, isobutyltriethoxysilane, and triethoxysilane.
Further, the catalyst of the invention is one or more of hydrochloric acid, sulfuric acid, acetic acid, citric acid and tartaric acid.
Further, the stabilizer of the invention is one or more of sodium tetraborate, sodium hydroxide, sodium bicarbonate, sodium phosphate, sodium carbonate, calcium chloride, calcium hydroxide and calcium sulfate.
Further, the preparation conditions of the modification solution a in step S01 were stirred at room temperature for hydrolysis for 2 hours.
Further, step S02 includes the steps of:
s021: cutting and processing the log into boards with the sizes of 50cm multiplied by 30cm multiplied by 5 cm;
s022: drying the wood board for 2-8 hours at the temperature of 45-75 ℃ and under the pressure of-0.1 Mpaa;
s023: putting the wood board dried in the step S022 into a soaking tank, adding the modified solution A prepared in the step S01 into the soaking tank, and immersing the wood board;
s024: regulating the internal pressure in the soaking tank to 1-5 MPa.
Further, step S03 includes the steps of:
SO 31: emptying the S02 soak solution, and standing the wood board for 1-2 hours under the conditions of-0.1 Mpa and 30-60 ℃;
s032: and (3) placing the wood board in the modified solution B in S01 for soaking for 2-3 hours.
Further, step S04 includes the steps of:
s041: releasing the pressure in the soaking tank, and discharging the modified solution;
s042: taking the soaked wood board out of the soaking tank, and washing with clear water;
s043: pressing the washed wood board for 8 hours at the temperature of 50 ℃;
s044: and drying the pressed wood board at the temperature of 80-110 ℃ for 6-10 hours to obtain the modified wood.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention provides a preparation method of multifunctional micro-nano structure modified wood, which cuts and processes log into wood boards with the size of 50cm multiplied by 30cm multiplied by 5cm before soaking the wood boards, so that the wood boards are conveniently placed into a soaking tank for soaking treatment, meanwhile, when the wood board with the thickness of 5cm is soaked, the wood board is convenient to absorb the modified solution, so that the soaking is more comprehensive, the wood board modifying effect is better, the wood board modifying solution can be more easily invaded into the wood board by soaking under the action of ultrasonic waves, meanwhile, before soaking, the wood board is placed at the temperature of 45-75 ℃ and the pressure of-0.1 Mpa for drying treatment for 5-8 hours, so that the moisture in the wood board is expected to be reduced, the phenomenon that the modified solution is diluted during soaking due to excessive moisture in the wood board is prevented, and the wood board modification effect of the modified solution is optimal.
2. According to the preparation method of the multifunctional micro-nano structure modified wood, provided by the invention, after a wood board is soaked in a soaking tank for a period of time, a modified solution A is absorbed by the wood board, a proper amount of modified solution B is added into the soaking tank, and high-temperature drying is carried out at a later stage, so that the modified solution absorbed to the cell walls and cell gaps of the wood is promoted to perform a cross-linking reaction with hydroxyl and carboxyl on the surface of lignocellulose of the wood, a micro-nano net structure is generated, the mechanical structure of the wood is changed, and the hardness, the elastic modulus and the bending strength of the modified wood are obviously improved.
3. The invention provides a preparation method of a multifunctional micro-nano structure modified wood, which comprises the following steps of: 0.1-5 parts of silane coupling agent, 1-20 parts of sodium silicate, 1-50 parts of furfuryl alcohol, 0.1-5 parts of catalyst and 100 parts of deionized water. Through the compounding of the components, the components gradually permeate into the wood boards in a closed soaking tank and are filled into gaps of the wood boards, so that the components in the wood boards are combined with wood molecules, a chain segment structure which is mutually connected is formed among the wood molecules, the wood boards are modified, meanwhile, the pressure in the soaking tank is set to be 1-5Mpa during soaking, the wood boards soaked in the modified solutions with different weight parts are soaked under different pressures, the time for the modified solutions to permeate into the wood boards is shortened, meanwhile, different mechanical structures of the modified wood can be formed through the formulas of the different modified solutions and the change of the pressing pressure, the mechanical structure of the modified wood produced by the preparation method is not single, and the modified wood with better quality can be prepared.
4. According to the preparation method of the multifunctional micro-nano structure modified wood, the silane coupling agent is introduced, so that the hydroxyl and carboxyl on the surface of lignocellulose of the wood are subjected to a cross-linking reaction, and the whole wood board has a hydrophobic function. The hydrophobic property of the wood can be freely adjusted according to different silane coupling agent combinations and proportions.
Drawings
FIG. 1 is an overall flow chart of a preparation method of the multifunctional micro-nano structure modified wood;
fig. 2 is a detailed flowchart of step S02 of the method for preparing a multifunctional micro-nano structure modified wood according to the present invention;
fig. 3 is a detailed flowchart of step S03 of the method for preparing a multifunctional micro-nano structure modified wood according to the present invention;
fig. 4 is a specific flowchart of step S04 of the method for preparing a multifunctional micro-nano structure modified wood according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a method for preparing a multifunctional micro-nano structure modified wood includes the following steps:
s01: preparing modified solutions A and B;
s02: placing the wood board in the modified solution A, heating, pressurizing and soaking under the ultrasonic condition;
s03: emptying the S02 soak solution, and adding a proper amount of modified solution B;
s04: the soaked logs are pressed, dried and shaped.
The modified solution A in the step S01 comprises the following components in parts by weight: 0.1-5 parts of silane coupling agent, 1-20 parts of sodium silicate, 1-50 parts of furfuryl alcohol, 0.1-5 parts of catalyst and 100 parts of deionized water.
One formulation of the modified solution B of step S01 is: 0.1-5 parts of stabilizer and 100 parts of deionized water.
The silane coupling agent is one or more of tetraethoxysilane, tetramethoxysilane, methyltriethoxysilane, ethyltriethoxysilane, propyltriethoxysilane, isobutyltriethoxysilane and triethoxysilane.
The catalyst is one or more of hydrochloric acid, sulfuric acid, acetic acid, citric acid and tartaric acid.
The stabilizer is one or more of sodium tetraborate, sodium hydroxide, sodium bicarbonate, sodium phosphate, sodium carbonate, calcium chloride, calcium hydroxide and calcium sulfate.
Further, the preparation conditions of the modification solution a in step S01 were stirred at room temperature for hydrolysis for 2 hours.
Referring to fig. 2, step S02 further includes the following steps:
s021: cutting and processing the log into boards with the sizes of 50cm multiplied by 30cm multiplied by 5 cm;
s022: drying the wood board for 2-8 hours at the temperature of 45-75 ℃ and under the pressure of-0.1 Mpaa;
s023: putting the dried wood board in the S022 into a soaking tank, adding the modified solution A prepared in the S01 into the soaking tank, and immersing the wood board;
s024: regulating the internal pressure in the soaking tank to 1-5 MPa.
Referring to fig. 3, step S03 further includes the following steps:
SO 31: emptying the S02 soak solution, and standing the wood board for 1-2 hours under the conditions of-0.1 Mpa and 30-60 ℃;
s032: and (3) placing the wood board in the modified solution B in S01 for soaking for 2-3 hours.
Referring to fig. 4, step S04 further includes the following steps:
s041: releasing the pressure in the soaking tank, and discharging the modified solution;
s042: taking the soaked wood board out of the soaking tank, and washing with clear water;
s043: pressing the washed wood board for 8 hours at the temperature of 50 ℃;
s044: and drying the pressed wood board at the temperature of 80-110 ℃ for 6-10 hours to obtain the modified wood.
In summary, the following steps: the invention provides a preparation method of multifunctional micro-nano structure modified wood, which is characterized in that before wood boards are soaked, logs are cut and processed into the wood boards with the sizes of 50cm multiplied by 30cm multiplied by 5cm, so that the wood boards are conveniently placed into a soaking tank for soaking treatment, meanwhile, when the wood board with the thickness of 5cm is soaked, the wood board is convenient to absorb the modified solution, so that the soaking is more comprehensive, the wood board modifying effect is better, the wood board modifying solution can be more easily invaded into the wood board by soaking under the action of ultrasonic waves, meanwhile, before soaking, the wood board is placed at the temperature of 45-75 ℃ and the pressure of-0.1 Mpa for drying treatment for 5-8 hours, so that the moisture in the wood board is expected to be reduced, the phenomenon that the modified solution is diluted when soaking due to excessive moisture in the wood board is prevented, and the wood board modification effect of the modified solution is optimal; after the wood board is soaked in the soaking tank for a period of time, the modified solution A is absorbed by the wood board, a proper amount of modified solution B is added into the soaking tank, and high-temperature drying is performed at a later stage, so that the modified solution absorbed to the cell wall and cell gaps of the wood is promoted to perform a crosslinking reaction with hydroxyl and carboxyl on the surface of lignocellulose of the wood, a micro-nano net structure is generated, the mechanical structure of the wood is changed, and the hardness, elastic modulus and bending strength of the modified wood are obviously improved; the modified solution comprises the following components in parts by weight: 0.1-5 parts of silane coupling agent, 1-20 parts of sodium silicate, 1-50 parts of furfuryl alcohol, 0.1-5 parts of catalyst and 100 parts of deionized water. Through the compounding of the components, the components gradually permeate into the wood boards in a closed soaking tank and are filled into gaps of the wood boards, so that the components in the wood boards are combined with wood molecules, the wood molecules form a chain segment structure which is mutually connected, the wood boards are modified, meanwhile, the pressure in the soaking tank is set to be 1-5Mpa during soaking, the wood boards soaked in the modified solutions with different weight parts are soaked under different pressures, the time for the modified solutions to permeate into the wood boards is shortened, meanwhile, different mechanical structures of the modified wood can be formed through the formulas of the different modified solutions and the change of the pressing pressure, the mechanical structure of the modified wood produced by the preparation method is not single, and the modified wood with better quality can be prepared; by introducing the silane coupling agent, the hydroxyl and carboxyl on the surface of the lignocellulose of the wood are subjected to cross-linking reaction, so that the whole wood board has a hydrophobic function. The hydrophobic property of the wood can be freely adjusted according to different silane coupling agent combinations and proportions.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A preparation method of multifunctional micro-nano structure modified wood comprises the following steps:
s01: preparing modified solutions A and B;
s02: placing the wood board in the modified solution A, heating, pressurizing and soaking under the ultrasonic condition;
s03: emptying the S02 soak solution, and adding a proper amount of modified solution B;
s04: the soaked logs are pressed, dried and shaped.
2. The preparation method of the multifunctional micro-nano structure modified wood according to claim 1, wherein the modification solution A in the step S01 comprises the following components in parts by weight: 0.1-5 parts of silane coupling agent, 1-20 parts of sodium silicate, 1-50 parts of furfuryl alcohol, 0.1-5 parts of catalyst and 100 parts of deionized water.
3. The method for preparing the multifunctional micro-nano structure modified wood according to claim 1, wherein a formula of the modified solution B in the step S01 is as follows: 0.1-5 parts of stabilizer and 100 parts of deionized water.
4. The method for preparing multifunctional modified wood with micro-nano structure as claimed in claim 2, wherein the silane coupling agent is one or more of tetraethoxysilane, tetramethoxysilane, methyltriethoxysilane, ethyltriethoxysilane, propyltriethoxysilane, isobutyltriethoxysilane, and triethoxysilane.
5. The method for preparing the multifunctional micro-nano structure modified wood according to claim 2, wherein the catalyst is one or more of hydrochloric acid, sulfuric acid, acetic acid, citric acid and tartaric acid.
6. The method for preparing the multifunctional micro-nano structure modified wood according to claim 3, wherein the stabilizer is one or more of sodium tetraborate, sodium hydroxide, sodium bicarbonate, sodium phosphate, sodium carbonate, calcium chloride, calcium hydroxide and calcium sulfate.
7. The method for preparing the multifunctional micro-nano structure modified wood according to claim 1, wherein the preparation condition of the modified solution A in the step S01 is stirring and hydrolyzing for 2 hours at normal temperature.
8. The method for preparing the multifunctional micro-nano structure modified wood according to claim 1, wherein the step S02 comprises the following steps:
s021: cutting and processing the log into boards with the dimensions of 50cm multiplied by 30cm multiplied by 5 cm;
s022: drying the wood board for 2-8 hours at the temperature of 45-75 ℃ and under the pressure of-0.1 Mpaa;
s023: putting the wood board dried in the step S022 into a soaking tank, adding the modified solution A prepared in the step S01 into the soaking tank, and immersing the wood board;
s024: regulating the internal pressure in the soaking tank to 1-5 MPa.
9. The method for preparing the multifunctional micro-nano structure modified wood according to claim 1, wherein the step S03 comprises the following steps:
SO 31: emptying the S02 soak solution, and standing the wood board for 1-2 hours under the conditions of-0.1 Mpa and 30-60 ℃;
s032: and (3) placing the wood board in the modified solution B in S01 for soaking for 2-3 hours.
10. The method for preparing the multifunctional micro-nano structure modified wood according to claim 1, wherein the step S04 comprises the following steps:
s041: releasing the pressure in the soaking tank, and discharging the modified solution;
s042: taking the soaked wood board out of the soaking tank, and washing with clear water;
s043: pressing the washed wood board for 8 hours at the temperature of 50 ℃;
s044: and drying the pressed wood board at the temperature of 80-110 ℃ for 6-10 hours to obtain the modified wood.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011276433.1A CN114505935A (en) | 2020-11-16 | 2020-11-16 | Preparation method of multifunctional micro-nano structure modified wood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011276433.1A CN114505935A (en) | 2020-11-16 | 2020-11-16 | Preparation method of multifunctional micro-nano structure modified wood |
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