CN114939910B - Waterproof agent for wood composite board and application method thereof - Google Patents
Waterproof agent for wood composite board and application method thereof Download PDFInfo
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- CN114939910B CN114939910B CN202210607837.7A CN202210607837A CN114939910B CN 114939910 B CN114939910 B CN 114939910B CN 202210607837 A CN202210607837 A CN 202210607837A CN 114939910 B CN114939910 B CN 114939910B
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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
- B27K3/025—Controlling the process
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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
- B27K3/007—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process employing compositions comprising nanoparticles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
- B27K3/12—Impregnating by coating the surface of the wood with an impregnating paste
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
- B27K3/36—Aliphatic 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
- 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
- B27K2240/00—Purpose of the treatment
- B27K2240/70—Hydrophobation treatment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Nanotechnology (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses a use method of a waterproof agent for a wood composite board, which comprises the following steps: s1, preparing a porous structure with resin as a matrix, dispersing paraffin and nano silicon dioxide particles into the porous structure, and adding water to form a waterproof agent; s2, treating the surface of the wood composite board by using methanol; s3, coating or soaking the waterproof agent in the step S1 on a fiber layer on the surface of the wood composite board, and drawing the waterproof agent by using methanol on the surface of the wood composite board to enable solute of the waterproof agent to be embedded into the fiber layer; and S4, drying the wood composite board at the temperature of 30-50 ℃, melting paraffin from the porous structure, bonding the paraffin with the interior of the fiber layer, and forming a waterproof film on the surface of the fiber layer. Through dispersing paraffin to porous structure in, utilize the capillary action of fibrous layer and the traction of methyl alcohol and water for during active ingredient in the waterproof agent gets into the fibrous layer smoothly, greatly improved the combination of waterproof agent and wooden composite sheet, improved wooden composite sheet's waterproof nature.
Description
Technical Field
The invention relates to the technical field of wood composite board waterproof treatment, in particular to a waterproof agent for a wood composite board and a using method thereof.
Background
The wooden composite board is a man-made board made of wood fiber or other plant fiber as raw material and adhesive. The wood composite board contains a large amount of hydrophilic groups, is easily affected by water in the environment, and has the problems of dry shrinkage, wet expansion, deformation and cracking, so that the surface of the wood composite board needs to be subjected to waterproof treatment.
Waterproofing treatments generally use waterproofing agents, and current waterproofing agents include: paraffin emulsion, fluoride, silica gel, and the like. The wood composite board is a strong-polarity material, so that the wood composite board is weaker in combination with non-polar paraffin, and the paraffin has a larger molecular weight and is difficult to enter a fiber layer on the surface of the wood composite board, so that the waterproof agent is separated from the wood composite board after the wood composite board is used for a long time, and the waterproof effect is invalid.
Therefore, there is a need for an improvement of the water repellent in the prior art to solve the above problems.
Disclosure of Invention
The invention overcomes the defects of the prior art, and provides the waterproof agent for the wood composite board and the use method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that: the use method of the waterproof agent for the wood composite board is characterized by comprising the following steps:
s1, preparing a porous structure with resin as a matrix, wherein paraffin and nano silicon dioxide particles are dispersed in the porous structure, and water is added to form a waterproof agent;
s2, treating the surface of the wood composite board by using methanol;
s3, coating or soaking the waterproof agent in the step S1 on a fiber layer on the surface of the wood composite board, and drawing the waterproof agent by using methanol on the surface of the wood composite board to enable solute of the waterproof agent to be embedded into the fiber layer;
and S4, drying the wood composite board at the temperature of 30-50 ℃, melting paraffin from the porous structure, bonding the paraffin with the interior of the fiber layer, and forming a waterproof film on the surface of the fiber layer.
In a preferred embodiment of the present invention, in the S1, nano silica particles and a stabilizer are mixed and stirred to obtain a substance a; stirring paraffin, resin, polyethylene and a pore-foaming agent to obtain a substance B with a porous structure; heating paraffin to melt, adding the substance A, mixing, dispersing into the porous structure substance B, adding water, mixing, and homogenizing.
In a preferred embodiment of the present invention, the mass ratio of the paraffin to the resin is 1:1 to 1.2; the concentration of the paraffin and the water is 0.08 to 0.14g/ml.
In a preferred embodiment of the present invention, the melting point of the paraffin is lower than that of the resin, and the melting point of the paraffin is in the range of 30 ℃ to 50 ℃.
In a preferred embodiment of the present invention, in S2, the fiber layer is treated with methanol, so that the degree of orientation of the fibers in the fiber layer is increased, and a capillary structure having a high degree of orientation is formed.
In a preferred embodiment of the present invention, in S3, the wetting action of the methanol draws the water repellent to the root of the fiber layer.
In a preferred embodiment of the present invention, the mass ratio of the nano silica particles to the paraffin is 1:1 to 4.
In a preferred embodiment of the invention, the resin is composed of a mixture of rubber resin, boronized resin and palm wax in a volume ratio of 1:1:2.
in a preferred embodiment of the present invention, the particle size of the porous structure is 160 to 200nm.
In a preferred embodiment of the present invention, the concentration of methanol is 70% to 85%.
The invention solves the defects in the background technology, and has the following beneficial effects:
The invention provides a waterproof agent for a wood composite board, which disperses paraffin into a porous structure, and makes use of the capillary action of a fiber layer and the traction action of methanol and water to enable active ingredients in the waterproof agent to smoothly enter the fiber layer, thereby greatly improving the combination of the waterproof agent and the wood composite board and improving the waterproof property of the wood composite board.
According to the invention, before the wood composite board is treated by the waterproof agent, the fiber layer is treated by methanol, so that the orientation degree of fibers in the fiber layer is higher, the capillary effect is stronger, the waterproof agent is pulled or attracted to the root of the fiber layer by combining the van der Waals force effect generated between the methanol and water, and bonding and surface film forming are formed after heating and melting, so that the long-acting combination of the waterproof agent and the wood composite board is improved, and the surface of the wood composite board is endowed with lasting and efficient waterproofness.
The resin is used as a matrix to prepare a stable porous structure with small particle size, the paraffin is dispersed into the porous structure in a liquid drop mode in a physical dispersion mode, and the porous structure is combined with the fiber layer in a liquid state again after entering the fiber layer and being dried by utilizing the difference of melting points of the resin and the paraffin.
The nano silicon dioxide particles are added into the waterproof agent, so that the nano silicon dioxide particles are combined with paraffin to increase the surface roughness of the waterproof agent, and the surface energy of the waterproof agent is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts;
fig. 1 is a flow chart of a method of using a water repellent for wood composite panels in accordance with a preferred embodiment of the present invention.
Description of the preferred embodiment
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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the following description of examples, "%" representing amounts are on a weight basis unless otherwise specified. Unless otherwise indicated, all numbers expressing feature sizes, quantities, and physical characteristics used in the specification and claims are to be understood as being modified in all instances by the term "about". Accordingly, unless indicated to the contrary, the numerical parameters set forth in the foregoing specification and attached claims are approximations that can be suitably varied by those skilled in the art in seeking to obtain the desired properties utilizing the teachings disclosed herein.
It is also noted that 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; the term "preferred" refers to a preferred alternative, but is not limited to only the selected alternative.
The invention provides a use method of a waterproof agent for a wood composite board, which is characterized in that paraffin is dispersed into a porous structure, and active ingredients in the waterproof agent smoothly enter a fiber layer by utilizing the capillary action of the fiber layer and the traction action of methanol and water, so that the combination of the waterproof agent and the wood composite board is greatly improved, and the waterproofness of the wood composite board is improved. As shown in fig. 1, the method comprises the following steps:
S1, preparing a porous structure with resin as a matrix, wherein paraffin and nano silicon dioxide particles are dispersed in the porous structure, and water is added and mixed to form the waterproof agent after homogenization;
s2, treating the surface of the wood composite board by using methanol;
s3, coating or soaking the waterproof agent in the step S1 on a fiber layer on the surface of the wood composite board, and drawing the waterproof agent by using methanol on the surface of the wood composite board to enable solute of the waterproof agent to be embedded into the fiber layer;
and S4, drying the wood composite board at the temperature of 30-50 ℃, melting paraffin from the porous structure, bonding the paraffin with the interior of the fiber layer, and forming a waterproof film on the surface of the fiber layer.
The preparation method of the waterproof agent comprises the following steps: mixing and stirring the nano silicon dioxide particles and the stabilizer to obtain a substance A; stirring paraffin, resin, polyethylene and a pore-foaming agent to obtain a substance B with a porous structure; heating paraffin to melt, adding the substance A, mixing, dispersing into the porous structure substance B, adding water, mixing, and homogenizing.
Wherein, the waterproof agent consists of 20 to 30 volume percent of paraffin, 20 to 30 volume percent of resin, 3 to 5 volume percent of polyethylene, 5 to 10 volume percent of pore-foaming agent and 40 to 45 volume percent of water. The mass ratio of the nano silicon dioxide particles, the stabilizer and the water is 1:1:100.
The melting point of the paraffin wax is lower than that of the resin, and the melting point of the paraffin wax is in the range of 30-50 ℃. The resin is formed by mixing rubber resin, boronized resin and palm wax according to the volume ratio of 1:1:2. the polyethylene can promote the formation of a porous structure, and further disperse the nano silica particles and the paraffin wax into the porous structure. The pore-foaming agent is one of butanol, butyl ether or dodecyl alcohol.
The stabilizer is trioctylphosphine, and can control and stabilize the size distribution of the nano silicon dioxide particles in a smaller range, so that the nano silicon dioxide particles are easier to disperse into a porous structure.
In the present invention, the concentration of methanol is 70% to 85%, preferably 85%.
According to the invention, before the waterproof agent is used for treating the wood composite board, the fiber layer is treated by the methanol, so that the orientation degree of fibers in the fiber layer is higher, a capillary structure with high orientation degree is formed, the capillary effect is at least improved by 1.3-1.4 times, and the capillary effect is stronger.
According to the invention, van der Waals force generated between methanol and water causes the waterproof agent to be drawn or attracted to the root of the fiber layer, and bonding and surface film forming are formed after heating and melting, so that long-term combination of the waterproof agent and the wood composite board is improved, and the surface of the wood composite board is endowed with lasting and efficient waterproof property.
Since methanol is affected by hydroxyl groups, hydrogen bonds exist between molecules, and in water, hydrogen bonds also exist between alcohol molecules and water molecules. The carbon-oxygen bond is a polar bond in the methanol due to the difference in electronegativity between carbon and oxygen, the methanol is a polar molecule, and the water molecule is a polar molecule, so that van der Waals force exists between the methanol and the water, and the waterproof agent is attracted to the root of the fiber layer.
The resin is used as a matrix to prepare a stable porous structure with small particle size, the paraffin is dispersed into the porous structure in a liquid drop mode in a physical dispersion mode, and the porous structure is combined with the fiber layer in a liquid state again after entering the fiber layer and being dried by utilizing the difference of melting points of the resin and the paraffin.
The communication rate of the porous structure is 30-40%. The particle size of the porous structure is 160-200 nm.
The nano silicon dioxide particles are added into the waterproof agent, so that the nano silicon dioxide particles are combined with paraffin to increase the surface roughness of the waterproof agent, and the surface energy of the waterproof agent is reduced. Wherein the particle size of the nano silicon dioxide particles is 10-30 nm. The following table 1 shows the effect of different mass ratios of nanosilica particles to paraffin wax on the water repellency of the water repellent, including 1:1,1:2,1:4 and a control group.
TABLE 1 Effect of silica concentration on Water repellency
| Mass ratio of nano silicon dioxide particle to paraffin | Contact angle/(°) of water and wood composite material | Roll angle/(°) |
| 1：4 | 145.2° | 20 |
| 1：2 | 156.2° | 6 |
| 1：1 | 146.3° | 8 |
| 0 | 128.3° | - |
The mass ratio of the nano silicon dioxide particles to the paraffin is 1:2. the waterproof performance is best at the concentration, and the hydrophobicity is reduced along with the increase of the nano silicon dioxide particles.
To compare the properties of the treated wood composite panels of the various examples, the wood used in the examples below was wood composite panels made from southern pine, but not limited to other wood materials.
Example one
Mixing and stirring 40g of nano silicon dioxide particles and 40g of stabilizer to obtain a substance A; stirring 80g of paraffin, 80g of resin, 12g of polyethylene and 12g of pore-foaming agent to obtain a substance B with a porous structure; heating paraffin to melt, adding the substance A, mixing, dispersing into the porous structure substance B, adding 1000ml water, mixing and homogenizing. Treating the surface of the wood composite board with 85% methanol; coating or dipping the prepared waterproof agent on the surface of the wood composite board; the wood composite board is dried at a temperature of 45 ℃, paraffin is melted from the porous structure, bonding is generated with the interior of the fiber layer, and a waterproof film is formed on the surface of the fiber layer.
Example two
Mixing and stirring 50g of nano silicon dioxide particles and 50g of stabilizing agent to obtain a substance A; stirring 100g of paraffin, 100g of resin, 13g of polyethylene and 13g of pore-foaming agent to obtain a substance B with a porous structure; heating paraffin to melt, adding the substance A, mixing, dispersing into the porous structure substance B, adding 1000ml water, mixing and homogenizing. Treating the surface of the wood composite board with 85% methanol; coating or dipping the prepared waterproof agent on the surface of the wood composite board; the wood composite board is dried at a temperature of 45 ℃, paraffin is melted from the porous structure, bonding is generated with the interior of the fiber layer, and a waterproof film is formed on the surface of the fiber layer.
EXAMPLE III
Mixing and stirring 60g of nano silicon dioxide particles and 60g of stabilizing agent to obtain a substance A; stirring 120g of paraffin, 120g of resin, 14g of polyethylene and 14g of pore-foaming agent to obtain a substance B with a porous structure; heating paraffin to melt, adding the substance A, mixing, dispersing into the porous structure substance B, adding 1000ml water, mixing and homogenizing. Treating the surface of the wood composite board with 85% methanol; coating or dipping the prepared waterproof agent on the surface of the wood composite board; the wood composite board is dried at a temperature of 45 ℃, paraffin is melted from the porous structure, bonding is generated with the interior of the fiber layer, and a waterproof film is formed on the surface of the fiber layer.
Example four
Mixing and stirring 70g of nano silicon dioxide particles and 70g of stabilizer to obtain a substance A; stirring 140g of paraffin, 140g of resin, 15g of polyethylene and 15g of pore-foaming agent to obtain a substance B with a porous structure; heating paraffin to melt, adding the substance A, mixing, dispersing into the porous structure substance B, adding 1000ml water, mixing and homogenizing. Treating the surface of the wood composite board with 85% methanol; coating or dipping the prepared waterproof agent on the surface of the wood composite board; the wood composite board is dried at a temperature of 45 ℃, paraffin is melted from the porous structure, bonding is generated with the interior of the fiber layer, and a waterproof film is formed on the surface of the fiber layer.
EXAMPLE five
An untreated wood composite.
According to the invention, a contact angle measuring instrument is used for measuring the contact angle, at least five positions of the wood composite board in the first to fifth embodiments are taken for measuring the contact angle, and the average value is obtained after errors are removed from the obtained values. In table 2 below, the effect of paraffin wax at 0.08 to 0.14g/ml on the water repellency of wood composite panels is shown.
TABLE 2 Effect of Paraffin concentration on Water repellency
| Group of | Paraffin concentration/(g/ml) | Contact angle/(°) of water and wood composite material | Roll angle/(°) |
| Example one | 0.08 | 152.6° | 7 |
| Example two | 0.1 | 157.4° | 6 |
| EXAMPLE III | 0.12 | 149.3° | 8 |
| Example four | 0.14 | 153.2° | 9 |
| EXAMPLE five | - | 126.1° | - |
Therefore, as can be seen from table 1, the contact angle between the surface of the wood composite board treated by the waterproof additive and water is significantly improved. The value of the initial contact angle in the fifth example was selected because the untreated surface of the material rapidly absorbed water into the wood within 1-2 seconds after contacting water (the value of the initial contact angle was the largest); the contact angle of the selected water drops on the surface of the wood subjected to the waterproof treatment after the water drops are balanced on the surface of the wood for 5 seconds is that the surface of the wood subjected to the waterproof treatment has strong hydrophobicity or the super-hydrophobicity contact angle value reaches more than 150 degrees, and the water drops on the surface of the wood subjected to the waterproof treatment can stably keep the spherical state of the water drops. When the surface of the treated material is inclined at a certain angle from a horizontal state, water drops can roll off from the inclined surface of the wood instead of permeating into the wood, so that the high contact angle value represents the excellent hydrophobicity of the treated material, thereby showing the waterproof effect of the wood composite material.
In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. The use method of the waterproof agent for the wood composite board is characterized by comprising the following steps:
s1, preparing a porous structure with resin as a matrix, wherein paraffin and nano silicon dioxide particles are dispersed in the porous structure, and water is added to form a waterproof agent;
s2, treating the surface of the wood composite board by using methanol;
s3, coating the water repellent agent in the S1 on a fiber layer on the surface of the wood composite board, and drawing the water repellent agent by using methanol on the surface of the wood composite board to enable solute of the water repellent agent to be embedded into the fiber layer;
and S4, drying the wood composite board at the temperature of 30-50 ℃, melting paraffin from the porous structure, bonding the paraffin with the interior of the fiber layer, and forming a waterproof film on the surface of the fiber layer.
2. The method of using a water repellent agent for wood composite panels as claimed in claim 1, wherein: in the S1, mixing and stirring nano silicon dioxide particles and a stabilizer to obtain a substance A; stirring paraffin, resin, polyethylene and a pore-foaming agent to obtain a substance B with a porous structure; heating and melting paraffin, adding the substance A, mixing, dispersing into the porous structure substance B, adding water, mixing and homogenizing.
3. The method of using a water repellent agent for wood composite panels as claimed in claim 2, wherein: the mass ratio of the paraffin to the resin is 1:1 to 1.2; the concentration of the paraffin and the water is 0.08-0.14 g/ml.
4. The method of using a water repellent agent for wood composite panels as claimed in claim 1, wherein: the melting point of the paraffin is lower than that of the resin, and the melting point of the paraffin is in the range of 30-50 ℃.
5. The method of using a water repellent agent for wood composite panels as claimed in claim 1, wherein: the mass ratio of the nano silicon dioxide particles to the paraffin is 1:1 to 4.
6. The method of using a water repellent agent for wood composite panels as claimed in claim 1, wherein: the particle size of the porous structure is 160-200 nm.
7. The method of using a water repellent agent for wood composite panels as claimed in claim 1, wherein: the concentration of the methanol is 70-85%.
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| CN202210607837.7A CN114939910B (en) | 2022-05-31 | 2022-05-31 | Waterproof agent for wood composite board and application method thereof |
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| CN202210607837.7A CN114939910B (en) | 2022-05-31 | 2022-05-31 | Waterproof agent for wood composite board and application method thereof |
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| CN114939910B true CN114939910B (en) | 2023-04-07 |
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| JP4872144B2 (en) * | 1999-08-24 | 2012-02-08 | 凸版印刷株式会社 | Water resistant paper, method for producing the same, and paper container |
| JP4675453B2 (en) * | 2000-04-26 | 2011-04-20 | リコーマイクロエレクトロニクス株式会社 | Water repellent treatment method for plastic surface |
| JP3841163B2 (en) * | 2001-02-22 | 2006-11-01 | 信越化学工業株式会社 | Method for producing modified plywood or modified veneer laminate |
| JP5111733B2 (en) * | 2005-03-09 | 2013-01-09 | 住友林業株式会社 | Water-based coating composition for treating woody base material, method for producing paint-treated woody base material using the same, and paint-treated woody base material obtained thereby |
| BE1020692A3 (en) * | 2012-05-16 | 2014-03-04 | Prayon Sa | METHOD FOR MANUFACTURING COMPOSITE MATERIAL |
| CN103600402A (en) * | 2013-11-13 | 2014-02-26 | 湖南圣保罗木业有限公司 | Waterproof material, waterproof fiberboard, laminated wood floor, production method of waterproof fiberboard, and production method of laminated wood floor |
| CN106087560B (en) * | 2016-06-28 | 2018-01-16 | 安阳华森纸业有限责任公司 | The preparation method of fluorine silicon resin and Nanocomposites modified paraffin waterproofing agent |
| CN109531742B (en) * | 2018-11-28 | 2021-04-27 | 湖南圣保罗木业有限公司 | Waterproof lubricating material for wood floor and waterproof lubricating treatment method |
| CN112157767A (en) * | 2020-08-24 | 2021-01-01 | 南京林业大学 | Wood modifier and preparation method and application thereof |
| CN112358798A (en) * | 2020-10-30 | 2021-02-12 | 安徽大禹防水科技发展有限公司 | Manufacturing method of floor waterproof material |
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