CN115319880A - Artificial board and preparation method thereof - Google Patents
Artificial board and preparation method thereof Download PDFInfo
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- CN115319880A CN115319880A CN202210788848.XA CN202210788848A CN115319880A CN 115319880 A CN115319880 A CN 115319880A CN 202210788848 A CN202210788848 A CN 202210788848A CN 115319880 A CN115319880 A CN 115319880A
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- 239000000835 fiber Substances 0.000 claims abstract description 99
- 239000002245 particle Substances 0.000 claims abstract description 42
- 238000011282 treatment Methods 0.000 claims abstract description 31
- 238000001035 drying Methods 0.000 claims abstract description 25
- 238000004140 cleaning Methods 0.000 claims abstract description 24
- 238000002791 soaking Methods 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 238000000465 moulding Methods 0.000 claims abstract description 12
- 230000004913 activation Effects 0.000 claims abstract description 9
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- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 230000003213 activating effect Effects 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 55
- 238000005452 bending Methods 0.000 claims description 14
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- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 10
- LFTLOKWAGJYHHR-UHFFFAOYSA-N N-methylmorpholine N-oxide Chemical compound CN1(=O)CCOCC1 LFTLOKWAGJYHHR-UHFFFAOYSA-N 0.000 claims description 9
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 7
- 239000004202 carbamide Substances 0.000 claims description 7
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 6
- 239000002608 ionic liquid Substances 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims 1
- 238000001212 derivatisation Methods 0.000 claims 1
- 239000000853 adhesive Substances 0.000 abstract description 16
- 230000001070 adhesive effect Effects 0.000 abstract description 16
- 239000011347 resin Substances 0.000 abstract description 11
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- 230000008569 process Effects 0.000 abstract description 2
- 231100000252 nontoxic Toxicity 0.000 abstract 1
- 230000003000 nontoxic effect Effects 0.000 abstract 1
- 241000196324 Embryophyta Species 0.000 description 100
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
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- 239000000203 mixture Substances 0.000 description 8
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- ICXWPWNCVZCKEG-UHFFFAOYSA-M lithium;2-methylpropanamide;chloride Chemical compound [Li+].[Cl-].CC(C)C(N)=O ICXWPWNCVZCKEG-UHFFFAOYSA-M 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 229920000168 Microcrystalline cellulose Polymers 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000004826 Synthetic adhesive Substances 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 239000000227 bioadhesive Substances 0.000 description 2
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- IAZSXUOKBPGUMV-UHFFFAOYSA-N 1-butyl-3-methyl-1,2-dihydroimidazol-1-ium;chloride Chemical compound [Cl-].CCCC[NH+]1CN(C)C=C1 IAZSXUOKBPGUMV-UHFFFAOYSA-N 0.000 description 1
- KAIPKTYOBMEXRR-UHFFFAOYSA-N 1-butyl-3-methyl-2h-imidazole Chemical class CCCCN1CN(C)C=C1 KAIPKTYOBMEXRR-UHFFFAOYSA-N 0.000 description 1
- 229920002488 Hemicellulose Polymers 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
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- 150000001449 anionic compounds Chemical class 0.000 description 1
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- 229910052801 chlorine Inorganic materials 0.000 description 1
- -1 chlorine ions Chemical class 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 238000011835 investigation Methods 0.000 description 1
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- 150000002891 organic anions Chemical class 0.000 description 1
- 150000002892 organic cations Chemical class 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
- B27N3/12—Moulding of mats from fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention discloses a preparation method of an artificial board, which comprises the following steps: activating plant fiber with non-derivative solvent to obtain plant fiber solution, wherein the plant fiber is wall-broken or non-wall-broken plant cell. And then, uniformly mixing the plant fiber solution and the plant particles for molding, and then sequentially carrying out drying treatment, soaking and cleaning treatment and standing treatment to obtain the artificial board. In the method, the artificial board is prepared by the cross-linking of the plant particles and the activated plant fibers through hydrogen bonds, a resin adhesive is not needed, and the artificial board is non-toxic and harmless in the production and use processes. And because a large amount of hydroxyl groups are exposed from the plant fibers in the plant fiber solution through activation treatment, the plant fibers can be more easily crosslinked with plant particles, so that the artificial board has excellent mechanical properties. Correspondingly, the invention also provides an artificial board.
Description
Technical Field
The invention relates to the field of wood processing, in particular to an artificial board and a preparation method thereof.
Background
The demand of wood is always increasing year by year, and the development of the artificial board industry is a main way for improving the utilization rate of wood and saving wood resources. In the existing manufacturing process of artificial boards, wood or other herbaceous plants are firstly crushed into particle materials, then chemical adhesives are applied to glue the particle materials under the action of temperature and pressure to form the artificial boards, and the artificial boards can be divided into plywood, particle boards, fiber boards and the like according to different plant raw materials.
According to statistics, china has huge market scale of artificial boards, and annual output exceeds ten million. However, in the current artificial board processing technology, a large amount of adhesive must be used in order to make the particle made of wood or other plant materials capable of being glued into a shape. According to the investigation that the amount of wood adhesive used in China is over ten thousand tons, the adhesive mainly comprises natural adhesive and synthetic adhesive including resin adhesive. Because the natural adhesive has low strength, the mechanical property of the manufactured artificial board is poor, most artificial boards are processed by using synthetic adhesives, and the most common adhesive is resin adhesive. These resin adhesives cause environmental pollution during the production process, and continuously release toxic volatile substances such as formaldehyde and the like during the use process, thereby causing environmental pollution and serious health risks.
Therefore, the artificial board which does not contain resin adhesive and has excellent mechanical property is manufactured, and has great significance and commercial prospect for the building industry and the home decoration industry.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide an artificial board which does not use resin adhesives in the production process and has better mechanical properties.
In order to solve the technical problems, the invention provides a preparation method of an artificial board, which comprises the following steps:
activating plant fiber with non-derivative solvent to obtain plant fiber solution, wherein the plant fiber is wall-broken or non-wall-broken plant cell.
And uniformly mixing the plant fiber solution and the plant particles, molding, and then sequentially performing drying treatment, soaking and cleaning treatment and standing treatment to obtain the artificial board.
In one possible implementation, the plant particles are wood particles and/or herb particles containing plant fibers, and the particle size of the plant particles is 2-1000 mesh.
In one possible implementation, the mass ratio of the plant particles to the plant fiber solution is (50.1-99.9) to (0.1-49.9).
In one possible implementation, the content of plant fiber in the plant fiber solution is 0.1-20% by weight.
In one possible implementation, the content of plant fiber in the plant fiber solution is 1-10% by weight.
In one possible implementation, the non-derivatizing solvent is selected from at least one of a mixed solution of lithium chloride and dimethylacetamide, an ionic liquid, a mixed solution of a base and urea, and a N-methylmorpholine-N-oxide solution.
In one possible implementation mode, the temperature of the activation treatment is-20-150 ℃, and the time of the activation treatment is 5min-72h.
In a possible implementation manner, before the standing treatment, the drying treatment and the soaking and cleaning treatment are performed at least twice.
In the method, the plant particles and the activated plant fibers are connected through hydrogen bonds to prepare the artificial board without using a resin adhesive. And because a large amount of hydroxyl groups are exposed from the plant fibers in the plant fiber solution through activation treatment, stronger crosslinking can be generated with plant particles more easily, so that the artificial board has excellent mechanical properties.
Correspondingly, the invention also provides an artificial board prepared by the preparation method of the artificial board.
In one possible implementation, the density of the artificial board is 0.05g/cm 3 -1.6g/cm 3 The bending strength of the artificial board is 1MPa-200MPa, and the D-type Shore hardness of the artificial board is 5HSD-85HSD.
The artificial board provided by the invention does not contain a resin adhesive and has excellent mechanical properties.
Drawings
FIG. 1 is a photograph of an artificial board made in example 1;
FIG. 2 is a photograph of the artificial board made in example 2;
FIG. 3 is a photograph of the artificial board made in example 3;
FIG. 4 is the rheological properties of the vegetable fibre solution prepared in example 1;
FIG. 5 is a graph showing the bending strength of the artificial board obtained in example 4;
FIG. 6 is a scanning electron micrograph of a cross-section of the artificial board obtained in example 5.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will recognize without departing from the spirit and scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
A preparation method of an artificial board comprises the following steps:
activating plant fiber with non-derivative solvent to obtain plant fiber solution, wherein the plant fiber is wall-broken or non-wall-broken plant cell.
And uniformly mixing the plant fiber solution and the plant particles, molding, and then sequentially performing drying treatment, soaking and cleaning treatment and standing treatment to obtain the artificial board.
According to the invention, the micro-structure of the micron-sized plant fiber is adjusted to destroy the hydrogen bond naturally existing in the plant fiber to prepare the plant fiber solution, and the dissolved plant fiber exposes more hydroxyl groups, so that the plant fiber can be easily crosslinked with plant particles. The plant fiber and the plant particles are mutually cross-linked to form a three-dimensional structure, and the artificial board with high strength, high modulus, high hardness and high water resistance is obtained under the condition of not using any resin adhesive.
In each of the above raw materials, the plant fibers comprise at least cellulose, and in a possible implementation, the plant fibers may also contain hemicellulose and/or lignin. Preferably, when the plant fiber is cellulose, the manufactured artificial board has higher hardness.
In one possible implementation manner, the operations of drying treatment and soaking and cleaning treatment are performed at least twice before the standing treatment. The plant fiber can actively shrink in the drying treatment to form a compact structure. Through repeated drying treatment and soaking and cleaning treatment, the molded plant fibers and plant particles are more fully crosslinked and hooked, so that the artificial board is more compact.
In one possible implementation, the plant particles are wood particles and/or herbal particles containing plant fibers, and the particle size of the plant particles is 2 mesh to 1000 mesh.
In one possible implementation, the mass ratio of the plant particles to the plant fiber solution is (30-90): (10-70). The artificial board prepared by the mass ratio has better mechanical property.
In one possible implementation, the content of plant fiber in the plant fiber solution is 0.1-20% by weight.
In one possible implementation, the content of plant fiber in the plant fiber solution is 1-10% by weight. When the content of the plant fiber in the plant fiber solution is within the range, the plant particles and the plant fiber can have better cross-linking strength.
In one possible implementation, the non-derivatizing solvent is selected from at least one of a mixed solution of lithium chloride and dimethylacetamide, an ionic liquid, a mixed solution of a base and urea, and a N-methylmorpholine-N-oxide solution.
In the above raw materials, the ionic liquid is a liquid salt composed of an organic cation and an organic or inorganic anion; eutectic solvents refer to liquid solvents formed from two or more solid or liquid substances that interact through hydrogen bonding.
In the raw materials, lithium ions and dimethylacetamide in the mixed solution of lithium chloride and dimethylacetamide form a composite cationic structure, and at the moment, chlorine ions in the system and hydroxyl groups in plant fibers form hydrogen bonds, so that hydrogen bonds between and in cellulose molecules are broken.
In one possible implementation mode, the temperature of the activation treatment is-20 ℃ to 150 ℃, and the time of the activation treatment is 5min to 72h.
In the method, the plant particles and the activated plant fibers are connected through hydrogen bonds to prepare the artificial board, a resin adhesive is not needed, no toxic or harmful gas is generated in the whole life using period, and the artificial board can be naturally degraded. And because a large amount of hydroxyl groups are exposed from the plant fibers after the activation treatment, the plant fibers can be more easily crosslinked with plant particles, so that the artificial board has excellent mechanical properties.
The method uses the plant fiber solution to be crosslinked with the plant particles, the plant fiber has rich source and low price, and the method has strong operability, high application value, simple operation and large-scale production. On the other hand, in the method, the plant fiber and the plant particle are molded without the assistance of mechanical external force, so that the cost is low, and the time and the energy are consumed less.
Correspondingly, the invention also provides an artificial board prepared by the preparation method of the artificial board.
In one possible implementation, the density of the artificial board is 0.05g/cm 3 -1.6g/cm 3 The bending strength of the artificial board is 1MPa-200MPa, and the D-type Shore hardness of the artificial board is 5HSD-85HSD.
The artificial board provided by the invention does not contain resin adhesives and has excellent mechanical properties.
With reference to the above implementation contents, in order to make the technical solution of the present invention more specific, clear and easy to understand, the technical solution of the present invention is exemplified, but it should be noted that the contents to be protected by the present invention are not limited to the following embodiment 1 to embodiment 8.
Example 1
Example 1 a filter pulp was used as a source of plant fibers, and a lithium chloride dimethylacetamide solution was used to activate the plant fibers, the specific steps being as follows:
17g of the filter pulp and 412g of a lithium chloride dimethylacetamide solution having a concentration of 8 wt% were mixed, stirred at 100 ℃ for 5 hours, and then taken out, and returned to room temperature to obtain a plant fiber solution.
And (3) uniformly mixing 17g of the plant fiber solution with 68g of wood powder with the particle size of 40 meshes, and then placing the mixture in a glass dish for molding to obtain the rough artificial board.
Drying the rough artificial board at 40 deg.C for 48h, soaking and cleaning with water, repeating the drying and soaking and cleaning steps for 3 times, standing at 0.1Mpa and 50 deg.C for 24h to obtain artificial board with structure shown in FIG. 1.
Example 2
Example 2 a plant fiber is activated with a mixed solution of sodium hydroxide and urea, using a microcrystalline cellulose as a plant fiber source, and the method comprises the following steps:
a plant fiber solution was obtained by uniformly mixing 51g of microcrystalline cellulose with 624g of a mixed solution of sodium hydroxide having a concentration of 7% by weight and 12% by weight of urea, stirring the mixture at-20 ℃ for 3 hours, taking out the mixture, and returning the mixture to room temperature.
And (3) uniformly mixing 10g of the plant fiber solution with 78g of sawdust with the particle size of 80 meshes, and then placing the mixture in a glass dish for molding to obtain the rough artificial board.
Drying the crude artificial board at 25 deg.C for 48h, soaking and cleaning with water, repeating the drying and soaking and cleaning steps for 3 times, standing at 0.5Mpa and 50 deg.C for 24h to obtain artificial board with structure shown in FIG. 2.
Example 3
Example 3 a dissolving pulp was used as a source of plant fiber, and the plant fiber was activated with N-methylmorpholine-N-oxide solution, the specific steps were as follows:
11g of the dissolving pulp and 351g of an N-methylmorpholine-N-oxide solution with a concentration of 50 wt% were mixed uniformly, stirred at 80 ℃ for 3 hours, and then taken out and returned to room temperature to obtain a plant fiber solution.
448g of plant fiber solution and 15g of straw powder with the grain diameter of 20 meshes are uniformly mixed and then placed in a glass vessel for molding, so that the rough artificial board is obtained.
Drying the rough artificial board at 60 deg.C for 48h, soaking and cleaning with water, repeating the drying and soaking and cleaning steps for 3 times, standing at 212Mpa and 50 deg.C for 24h to obtain artificial board with structure shown in FIG. 3.
Example 4
Example 4 a dissolving pulp is used as a plant fiber source, and a mixed solution of sodium hydroxide and urea is used to activate the plant fiber, which comprises the following specific steps:
mixing 21g of the dissolving pulp with 651g of a mixed solution of sodium hydroxide, as concentrated as 7% by weight, and 12% by weight of urea, stirring at 80 deg.C for 3 hours, taking out, and returning to room temperature to obtain a vegetable fiber solution.
And uniformly mixing 35g of the plant fiber solution with 78g of straw powder with the particle size of 40 meshes, and then placing the mixture in a glass vessel for molding to obtain the rough artificial board.
Drying the rough artificial board at 40 deg.C for 48h, soaking and cleaning with water, repeating the drying and soaking and cleaning steps for 3 times, and standing at 0.6Mpa and 50 deg.C for 24h to obtain artificial board.
Example 5
Example 5 hardwood pulp was used as the source of plant fiber and the plant fiber was activated with N-methylmorpholine-N-oxide solution as follows:
mixing 21g hardwood pulp with 651g N-methylmorpholine-N-oxide solution with a concentration of 50% by weight, stirring at 80 deg.C for 3 hr, taking out, and returning to room temperature to obtain plant fiber solution.
And uniformly mixing 60g of plant fiber solution and 78g of wood chips with the particle size of 40 meshes, and then placing the mixture in a glass dish for molding to obtain the rough artificial board.
Drying the crude artificial board at 40 deg.C for 48h, soaking and cleaning with water, repeating the drying and soaking and cleaning steps for 3 times, and standing at 0Mpa and 50 deg.C for 24h to obtain artificial board.
Example 6
Example 6 hardwood pulp was used as the source of plant fiber and the plant fiber was activated with N-methylmorpholine-N-oxide solution as follows:
mixing 31g of hardwood pulp with 731g of N-methylmorpholine-N-oxide solution with a concentration of 50% by weight, stirring at 80 deg.C for 3 hours, taking out, and returning to room temperature to obtain a plant fiber solution.
And uniformly mixing 748g of the plant fiber solution and 42g of bamboo powder with the grain diameter of 40 meshes, and then placing the mixture into a glass dish for molding to obtain the rough artificial board.
Drying the rough artificial board at 40 deg.C for 48h, soaking and cleaning with water, repeating the drying and soaking and cleaning steps for 3 times, and standing at 300Mpa and 50 deg.C for 24h to obtain artificial board.
Example 7
Example 7 hardwood pulp was used as the source of plant fiber and 1-butyl-3-methylimidazole chloride solution was used to activate the plant fiber as follows:
60g of hardwood pulp and 650g of chlorinated 1-butyl-3-methylimidazole solution are uniformly mixed, stirred for 3 hours at 100 ℃, taken out and restored to room temperature to obtain the plant fiber solution.
552g of plant fiber solution and 20g of bamboo powder with the grain diameter of 10 meshes are uniformly mixed and then placed in a glass vessel for molding to obtain a rough artificial board.
Drying the rough artificial board at 40 deg.C for 48h, soaking and cleaning with water, repeating the drying and soaking and cleaning steps for 3 times, and standing at 100Mpa and 50 deg.C for 24h to obtain artificial board.
Example 8
Example 8 the dissolving pulp is used as the plant fiber source, and the plant fiber is activated by using the dimethylacetamide solution of lithium chloride, and the specific steps are as follows:
21g of the dissolving pulp and 651g of a lithium chloride dimethylacetamide solution with a concentration of 8 wt% were mixed uniformly, stirred at 100 ℃ for 3 hours, and then taken out and returned to room temperature to obtain a vegetable fiber solution.
277g of plant fiber solution and 78g of deconstructed and dried wood chips are uniformly mixed, and then placed in a glass dish for molding to obtain a rough artificial board.
Drying the rough artificial board at 40 ℃ for 48h, then soaking and cleaning the rough artificial board with water, repeating the steps of drying and soaking and cleaning for 3 times, and then standing the rough artificial board at 2Mpa and 50 ℃ for 24h to obtain the artificial board.
And (3) performance testing:
the rheological properties of the plant fiber solution prepared in example 1, the micro-morphology of the artificial board prepared in example 5, and the density, flexural strength and shore D hardness of the artificial boards prepared in examples 1 to 8 were tested or characterized, respectively, according to the following test methods and test data:
rheological properties: performing rheological property test by using HAAKE MARS60 rheometer in dynamic viscosity test (rotation mode) with shear rate of 0.1s -1 -1000s -1 The temperature was constant at 25 ℃.
The rheological properties of the vegetable fibre solution prepared in example 1 are shown in figure 4. As can be seen from fig. 4, the viscosity of the vegetable fiber solution prepared in example 1 was greatly increased.
Microscopic morphology: the artificial board prepared in example 5 was gold-plated on its cross-section, and then a scanning electron microscope produced by zeiss was used to characterize the morphology of the whole plant artificial board with an acceleration voltage of 5kV.
The micro-topography of the artificial board made in example 5 is shown in fig. 6. As can be seen from FIG. 6, the plant fibers in the artificial board are bent, deformed and tightly wound to form a compact structure.
Density: and measuring the mass of the material by adopting an analytical balance, measuring the volume of the material by adopting a liquid discharge method, and obtaining the density of the artificial board according to the ratio of the mass to the volume.
Shore D hardness: the Shore D hardness tester was pressed flat against the surface of the sample, and the reading was recorded after the values stabilized.
Bending strength: the test was carried out using a miniature electronic universal tester (CMT 4104) in ten thousand hours on the Shandong. In the bending performance test, the sample size is 70mm × 6mm × 3mm, the distance between two lower rollers of the bending fixture is 34mm, and an upper roller is pressed downwards at the speed of 2mm/min in the middle until the standard sample is broken or the mechanical property of the material is suddenly reduced.
The bending strength and bending strain of the artificial board obtained in example 4 are shown in fig. 5. As can be seen from fig. 5, the maximum bending strength of the artificial board prepared in example 4 is 24Mpa, which corresponds to a bending strength of about 3.0%, indicating that the artificial board prepared in example 4 has higher bending strength and bending modulus.
The density, flexural strength and D-Shore hardness of the artificial boards obtained in examples 1-8 are shown in Table 1.
TABLE 1 Density, flexural Strength and Shore D hardness of the Artificial boards obtained in examples 1 to 8
As can be seen from Table 1, the density of the artificial boards obtained in examples 1 to 8 was 0.05g/cm 3 -1.6g/cm 3 The bending strength of the artificial board is 1-200 Mpa, and the D-type Shore hardness of the artificial board is 5HSD-85HSD, which shows that the artificial board of the technical scheme of the invention has excellent mechanical properties.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The preparation method of the artificial board is characterized by comprising the following steps:
activating plant fibers by using a non-derivatization solvent to obtain the plant fiber solution, wherein the plant fibers are plant cells with wall breaking or non-wall breaking;
and uniformly mixing the plant fiber solution and the plant particles, molding, and then sequentially performing drying treatment, soaking and cleaning treatment and standing treatment to obtain the artificial board.
2. The method for producing an artificial board according to claim 1, wherein the drying and the soaking and cleaning are performed at least twice before the standing treatment.
3. The artificial board preparation method according to claim 1, wherein the mass ratio of the plant particles to the plant fiber solution is (30-90) to (10-70).
4. The method of claim 1, wherein the content of plant fiber in the plant fiber solution is 0.1-20% by weight.
5. The method of claim 1 or 4, wherein the plant fiber solution contains plant fiber in an amount of 1-10% by weight.
6. The method for preparing artificial boards according to claim 1 wherein the temperature of the activation treatment is-20 ℃ to 150 ℃ and the time of the activation treatment is 5min to 72h.
7. The method for preparing artificial board according to claim 1, wherein the non-derivative solvent is at least one selected from the group consisting of lithium chloride in dimethylacetamide, ionic liquids, mixed solutions of alkali and urea, and N-methylmorpholine-N-oxide.
8. The method for preparing artificial boards according to claim 1 wherein the plant particles are wood particles and/or herbal particles containing plant fibers and the particle size of the plant particles is 2-1000 mesh.
9. An artificial board, characterized in that it is produced by the method for producing an artificial board according to any one of claims 1 to 8.
10. The artificial board of claim 9, wherein the density of the artificial board is 0.05g/cm 3 -1.6g/cm 3 The bending strength of the artificial board is 1MPa-200MPa, and the D-type Shore hardness of the artificial board is 5HSD-85HSD.
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| CN202210788848.XA CN115319880B (en) | 2022-07-06 | 2022-07-06 | Artificial board and preparation method thereof |
| PCT/CN2022/105622 WO2024007359A1 (en) | 2022-07-06 | 2022-07-14 | Artificial board and preparation method therefor |
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| CN202210788848.XA CN115319880B (en) | 2022-07-06 | 2022-07-06 | Artificial board and preparation method thereof |
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| CN115319880B (en) | 2023-10-27 |
| WO2024007359A1 (en) | 2024-01-11 |
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