CN111136746A - Bamboo desugaring method and preparation method of bamboo tows for anti-corrosion bamboo boards - Google Patents
Bamboo desugaring method and preparation method of bamboo tows for anti-corrosion bamboo boards Download PDFInfo
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- CN111136746A CN111136746A CN202010004179.3A CN202010004179A CN111136746A CN 111136746 A CN111136746 A CN 111136746A CN 202010004179 A CN202010004179 A CN 202010004179A CN 111136746 A CN111136746 A CN 111136746A
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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
- B27K9/00—Chemical or physical treatment of reed, straw, or similar material
- B27K9/002—Cane, bamboo
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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
- B27K3/34—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
- B27K3/34—Organic impregnating agents
- B27K3/50—Mixtures of different organic 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
- 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
- B27K5/0085—Thermal treatments, i.e. involving chemical modification of wood at temperatures well over 100°C
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
- B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
- B27L11/02—Manufacture of wood shavings, chips, powder, or the like; Tools therefor of wood shavings or the like
- B27L11/04—Manufacture of wood shavings, chips, powder, or the like; Tools therefor of wood shavings or the like of wood wool
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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
- B27K2240/15—Decontamination of previously treated wood
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Abstract
The invention relates to the technical field of bamboo processing, in particular to a desugaring method for bamboo and a preparation method of bamboo tows for an anti-corrosion bamboo board. The novel eutectic solvent is used as a solvent, ultrasonic strengthening is added, the treatment condition is mild, the dissolution of saccharides in non-aqueous-phase bamboo and hydrolysis with controllable polymerization degree are realized, a high-added-value xylo-oligosaccharide byproduct is co-produced, and the problem that the components of an extracting solution are complex and difficult to treat is avoided; meanwhile, the eutectic solvent used in the bamboo desugarization treatment process can be recycled through simple treatment. The bamboo material is treated by the bamboo material desugaring method, so that the corrosion and mildew resistance of the bamboo material can be effectively improved, and the bamboo material can be widely used for producing outdoor landscape materials and indoor household materials with high resistance. In addition, the whole production process is simple and easy to implement, the bamboo filament bundles are not de-enzymed and de-yellowed, and the utilization rate of raw materials is high.
Description
Technical Field
The invention relates to the technical field of bamboo processing, in particular to a desugaring method for bamboo and a preparation method of bamboo tows for an anti-corrosion bamboo board.
Background
The carbonization method and the cooking method are the most commonly used methods for obtaining the bamboo filament bundles for the anti-corrosion bamboo boards at present. The carbonization can decompose the nutrient substances in the bamboo wood to achieve the effects of corrosion resistance and mildew resistance of the bamboo wood, and the carbonized bamboo filament bundles can be directly used for producing the anticorrosive bamboo boards only by adding a small amount of preservative or even without being treated by the preservative; however, the mechanical properties and original color of the bamboo filament bundle can be obviously changed by the carbonization process, and the corrosion and mildew prevention effects of the bamboo chips and the influence of the carbonization degree on the material properties are obvious, so that the quality of the bamboo board is influenced, and a large amount of carbonization smoke is generated in the process of treating the bamboo by the carbonization method, which is not easy to treat. The cooking treatment is that firstly the bamboo sheets are cooked by water and heat to remove most of nutrient substances such as sugar and the like, and then the bamboo sheets are soaked by the preservative to achieve the purposes of corrosion resistance and mildew resistance; however, the difference of technological parameters and methods in the cooking process and the anticorrosion dipping process and the difference of the types of the preservatives have influence on the mechanical strength, the anticorrosion performance, the environmental protection performance and the like of the bamboo wood, and a large amount of cooking wastewater is generated in the process of treating the bamboo wood by adopting the cooking method, so that the treatment is not good. The patent 108818870A is subjected to heat preservation treatment for 2040 minutes in 2.22.8% boric acid aqueous solution at 8595 ℃, pulse current is continuously introduced in the treatment process, and an intermediate material is obtained after the treatment is completed. Patent 109773920A puts the bamboo strip into the soaking tank containing the soak solution for soaking, and adopts high pressure soaking to realize the full penetration adsorption of the agent. Patent 106042136B adopts the mode of high temperature carbonization to process the bamboo timber, saves the medicament and uses. 107953429A is prepared by adding bamboo filament, water and functional sugar extraction auxiliary into horizontal steaming pot, heating, steaming, and selectively dissolving out functional sugar. Patent 103496024B adopts the method of cooking to desugarize, degrease the bamboo filament, the cooking temperature is 100 degrees centigrade to 110 degrees centigrade, the cooking time is 2 hours to 4 hours.
In order to solve the problems, the invention aims to provide a bamboo desugaring method and a preparation method of bamboo tows for an anti-corrosion bamboo board. The bamboo desugaring method provided by the invention can realize the dissolution of saccharides in non-aqueous phase bamboo and hydrolysis with controllable polymerization degree, co-produce high added value xylooligosaccharide byproduct, and avoid the problem that the components of the extracting solution are complex and difficult to process; meanwhile, the eutectic solvent used in the bamboo desugarization treatment process can be recycled through simple treatment. The bamboo is treated by the bamboo desugaring method, so that the corrosion and mildew resistance of the bamboo can be effectively improved, and the prepared bamboo filament bundle can be widely used for producing high-resistance outdoor landscape materials and indoor household materials. In addition, the whole production process is simple and easy to implement, the bamboo filament bundles are not de-enzymed and de-yellowed, and the utilization rate of raw materials is high.
Disclosure of Invention
In order to solve the above problems, a first aspect of the present invention provides a method for desugaring bamboo, comprising the steps of:
(1) pretreating bamboo wood;
(2) and (3) adding a eutectic solvent into the horizontal digester, heating to 60-120 ℃, adding the bamboo wood obtained in the step (1) after the solvent is completely melted, and carrying out ultrasonic treatment for 5-30 h.
As a preferred embodiment, the bamboo desugaring method comprises the following steps:
(1) pretreating bamboo wood;
(2) and (2) adding the eutectic solvent into a horizontal digester, heating to 70-100 ℃, adding the bamboo wood obtained in the step (1) after the solvent is completely melted, and carrying out ultrasonic treatment for 10-20 hours.
As a preferred embodiment, in the step (2), the eutectic solvent is a choline eutectic solvent.
As a preferred embodiment, in the step (2), the eutectic solvent is a choline-type eutectic solvent in which the hydrogen bond donor is a carboxylic acid or a polyhydric alcohol.
As a preferred embodiment, in the step (2), the eutectic solvent is selected from at least one of the following:
phenylacetic acid: choline chloride molar ratio 1: 1 eutectic solvent;
succinic acid: choline chloride molar ratio 1: 2, a eutectic solvent;
glycerol: choline chloride molar ratio 1: 2, a eutectic solvent;
ethylene glycol: choline chloride molar ratio 1: 2.
In a preferred embodiment, in step (2), the ultrasonic frequency is 20-25 KHz.
In a preferred embodiment, in step (2), the ultrasonic frequency is 22 KHz.
As a preferred embodiment, in the step (2), the mass ratio of the bamboo wood to the eutectic solvent is 1: (3.5-10).
As a preferred embodiment, in the step (2), the mass ratio of the bamboo wood to the eutectic solvent is 1: 3.5.
the second aspect of the invention provides a preparation method of bamboo tows for an anticorrosive bamboo board, which comprises the following steps: the bamboo strands for the anticorrosive bamboo board are prepared by carrying out desugarization treatment on bamboo by adopting the bamboo desugarization method and then carrying out post-treatment.
Has the advantages that: the invention provides a bamboo desugaring method, which utilizes a novel eutectic solvent as a solvent, and is added with ultrasonic strengthening, the treatment condition is mild, the defects of poor performance and color of a plate material, easy ignition in a carbonization process, easy generation of waste liquid and smoke and the like in a carbonization method are avoided, and the problems of harsh conditions (high temperature and high pressure are often needed) and the need of adding an auxiliary agent in the traditional water phase cooking are also avoided. The bamboo desugaring method provided by the invention can realize the dissolution of saccharides in non-aqueous phase bamboo and hydrolysis with controllable polymerization degree, co-produce high added value xylooligosaccharide byproduct, and avoid the problem that the components of the extracting solution are complex and difficult to process; meanwhile, the eutectic solvent used in the bamboo desugarization treatment process can be recycled through simple treatment. The bamboo material is treated by the bamboo material desugaring method, so that the corrosion and mildew resistance of the bamboo material can be effectively improved, and the bamboo material can be widely used for producing outdoor landscape materials and indoor household materials with high resistance. In addition, the whole production process is simple and easy to implement, the bamboo filament bundles are not de-enzymed and de-yellowed, and the utilization rate of raw materials is high.
Detailed Description
The technical features in the technical solutions provided by the present invention are further clearly and completely described below with reference to the specific embodiments, but the scope of protection of the present invention is not limited thereto.
"preferred", "more preferred", and the like, in the present invention, refer to embodiments of the invention that may provide certain benefits, under certain circumstances. However, other embodiments may be preferred, under the same or other circumstances. Furthermore, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.
The invention provides a bamboo desugaring method in a first aspect, which comprises the following steps:
(1) pretreating bamboo wood;
(2) and (2) adding the eutectic solvent into a horizontal digester, heating to 60-120 ℃, adding the bamboo wood obtained in the step (1) after the solvent is completely melted, and carrying out ultrasonic treatment for 5-30 h.
In a preferred embodiment, the bamboo desugaring method comprises the following steps:
(1) pretreating bamboo wood;
(2) and (2) adding the eutectic solvent into a horizontal digester, heating to 70-100 ℃, adding the bamboo wood obtained in the step (1) after the solvent is completely melted, and carrying out ultrasonic treatment for 10-20 hours.
In a more preferred embodiment, the bamboo desugaring method comprises the following steps:
(1) pretreating bamboo wood;
(2) and (3) adding the eutectic solvent into a horizontal digester, heating to 90 ℃, adding the bamboo wood obtained in the step (1) after the solvent is completely melted, and carrying out ultrasonic treatment for 15 hours.
In one embodiment, in step (1), the bamboo pretreatment comprises the steps of: cutting, breaking and untwining the collected bamboo wood for later use.
In a more preferred embodiment, the bamboo desugaring method comprises the following steps:
(1) bamboo wood pretreatment: cutting, breaking and defibering the collected bamboo wood for later use;
(2) and (3) adding the eutectic solvent into a horizontal digester, heating to 90 ℃, adding the bamboo wood obtained in the step (1) after the solvent is completely melted, and carrying out ultrasonic treatment for 15 hours.
In one embodiment, in step (2), the eutectic solvent is a choline-based eutectic solvent.
In a preferred embodiment, in step (2), the eutectic solvent is a choline-type eutectic solvent in which the hydrogen bond donor is a carboxylic acid or a polyhydric alcohol.
In a more preferred embodiment, in step (2), the eutectic solvent is selected from at least one of the following:
phenylacetic acid: choline chloride molar ratio 1: 1 eutectic solvent;
succinic acid: choline chloride molar ratio 1: 2, a eutectic solvent;
glycerol: choline chloride molar ratio 1: 2, a eutectic solvent;
ethylene glycol: choline chloride molar ratio 1: 2.
The applicant finds out through a large number of experiments that when the specific eutectic solvent is adopted, the desugaring effect can be improved while the performance of the bamboo material is ensured, because the eutectic solvent has extremely strong polarity, hydrogen bonds in hemicellulose can be destroyed, and then the hemicellulose is directly dissolved, so that the desugaring effect is achieved, and an extraction auxiliary agent does not need to be added.
In a preferred embodiment, in step (2), the ultrasonic frequency is 20-25 KHz.
In a more preferred embodiment, in step (2), the ultrasonic frequency is 22 KHz.
The invention adopts ultrasonic treatment to strengthen mass transfer and can further improve the desugaring effect.
In a preferred embodiment, in the step (2), the mass ratio of the bamboo wood to the eutectic solvent is 1: (3.5-10).
In a more preferred embodiment, in the step (2), the mass ratio of the bamboo wood to the eutectic solvent is 1: 3.5.
the second aspect of the invention provides a preparation method of bamboo tows for an anticorrosive bamboo board, which comprises the following steps: the bamboo strands for the anticorrosive bamboo board are prepared by carrying out desugarization treatment on bamboo by adopting the bamboo desugarization method and then carrying out post-treatment.
In one embodiment, the post-treatment comprises the steps of washing with clear water, drying and curing.
In a preferred embodiment, the water washing liquid after being washed by clear water is collected to obtain the eutectic solvent water solution containing sugar, the eutectic solvent water solution containing sugar is subjected to electrodialysis treatment to obtain the eutectic solvent water solution without sugar, and the eutectic solvent water solution without sugar is evaporated and dehydrated to obtain the recyclable eutectic solvent.
Hereinafter, the present invention will be described in more detail by way of examples, but it should be understood that these examples are merely illustrative and not restrictive.
Examples
Example 1
The embodiment 1 of the invention provides a bamboo desugaring method, which comprises the following steps:
(1) bamboo wood pretreatment: cutting, breaking and defibering the collected bamboo wood for later use;
(2) and (3) adding the eutectic solvent into a horizontal digester, heating to 90 ℃, adding the bamboo wood obtained in the step (1) after the solvent is completely melted, and carrying out ultrasonic treatment for 15 hours.
In the step (2), the eutectic solvent is phenylacetic acid: choline chloride molar ratio 1: 1 eutectic solvent.
In the step (2), the ultrasonic frequency is 22 KHz.
In the step (2), the mass ratio of the bamboo wood to the eutectic solvent is 1: 3.5.
the embodiment 1 of the invention also provides a preparation method of the bamboo tows for the anticorrosive bamboo boards, which comprises the following steps: the bamboo strands for the anticorrosive bamboo board are prepared by carrying out desugarization treatment on bamboo by adopting the bamboo desugarization method, and then carrying out washing, drying and curing procedures by using clear water.
Example 2
The embodiment 2 of the invention provides a bamboo desugaring method, which comprises the following steps:
(1) bamboo wood pretreatment: cutting, breaking and defibering the collected bamboo wood for later use;
(2) and (3) adding the eutectic solvent into a horizontal digester, heating to 90 ℃, adding the bamboo wood obtained in the step (1) after the solvent is completely melted, and carrying out ultrasonic treatment for 15 hours.
In the step (2), the eutectic solvent is succinic acid: choline chloride molar ratio 1: 2.
In the step (2), the ultrasonic frequency is 22 KHz.
In the step (2), the mass ratio of the bamboo wood to the eutectic solvent is 1: 3.5.
the embodiment 2 of the invention also provides a preparation method of the bamboo tows for the anticorrosive bamboo boards, which comprises the following steps: the bamboo strands for the anticorrosive bamboo board are prepared by carrying out desugarization treatment on bamboo by adopting the bamboo desugarization method, and then carrying out washing, drying and curing procedures by using clear water.
Example 3
The embodiment 3 of the invention provides a bamboo desugaring method, which comprises the following steps:
(1) bamboo wood pretreatment: cutting, breaking and defibering the collected bamboo wood for later use;
(2) and (3) adding the eutectic solvent into a horizontal digester, heating to 90 ℃, adding the bamboo wood obtained in the step (1) after the solvent is completely melted, and carrying out ultrasonic treatment for 15 hours.
In the step (2), the eutectic solvent is glycerol: choline chloride molar ratio 1: 2.
In the step (2), the ultrasonic frequency is 22 KHz.
In the step (2), the mass ratio of the bamboo wood to the eutectic solvent is 1: 3.5.
the embodiment 3 of the invention also provides a preparation method of the bamboo tows for the anticorrosive bamboo boards, which comprises the following steps: the bamboo strands for the anticorrosive bamboo board are prepared by carrying out desugarization treatment on bamboo by adopting the bamboo desugarization method, and then carrying out washing, drying and curing procedures by using clear water.
Example 4
Embodiment 4 of the present invention provides a bamboo desugaring method, comprising the following steps:
(1) bamboo wood pretreatment: cutting, breaking and defibering the collected bamboo wood for later use;
(2) and (3) adding the eutectic solvent into a horizontal digester, heating to 90 ℃, adding the bamboo wood obtained in the step (1) after the solvent is completely melted, and carrying out ultrasonic treatment for 15 hours.
In the step (2), the eutectic solvent is ethylene glycol: choline chloride molar ratio 1: 2.
In the step (2), the ultrasonic frequency is 22 KHz.
In the step (2), the mass ratio of the bamboo wood to the eutectic solvent is 1: 3.5.
the embodiment 4 of the invention also provides a preparation method of the bamboo tows for the anticorrosive bamboo boards, which comprises the following steps: the bamboo strands for the anticorrosive bamboo board are prepared by carrying out desugarization treatment on bamboo by adopting the bamboo desugarization method, and then carrying out washing, drying and curing procedures by using clear water.
Example 5
Embodiment 5 of the present invention provides a bamboo desugaring method, comprising the following steps:
(1) bamboo wood pretreatment: cutting, breaking and defibering the collected bamboo wood for later use;
(2) and (3) adding the eutectic solvent into a horizontal digester, heating to 70 ℃, adding the bamboo wood obtained in the step (1) after the solvent is completely melted, and carrying out ultrasonic treatment for 20 hours.
In the step (2), the eutectic solvent is phenylacetic acid: choline chloride molar ratio 1: 1 eutectic solvent.
In the step (2), the ultrasonic frequency is 25 KHz.
In the step (2), the mass ratio of the bamboo wood to the eutectic solvent is 1: 8.
the embodiment 5 of the invention also provides a preparation method of the bamboo tows for the anticorrosive bamboo boards, which comprises the following steps: the bamboo strands for the anticorrosive bamboo board are prepared by carrying out desugarization treatment on bamboo by adopting the bamboo desugarization method, and then carrying out washing, drying and curing procedures by using clear water.
Example 6
Embodiment 6 of the invention provides a bamboo desugaring method, which comprises the following steps:
(1) bamboo wood pretreatment: cutting, breaking and defibering the collected bamboo wood for later use;
(2) and (3) adding the eutectic solvent into a horizontal digester, heating to 100 ℃, adding the bamboo wood obtained in the step (1) after the solvent is completely melted, and carrying out ultrasonic treatment for 10 hours.
In the step (2), the eutectic solvent is phenylacetic acid: choline chloride molar ratio 1: 1 eutectic solvent.
In the step (2), the ultrasonic frequency is 20 KHz.
In the step (2), the mass ratio of the bamboo wood to the eutectic solvent is 1: 5.
the embodiment 6 of the invention also provides a preparation method of the bamboo tows for the anticorrosive bamboo boards, which comprises the following steps: the bamboo strands for the anticorrosive bamboo board are prepared by carrying out desugarization treatment on bamboo by adopting the bamboo desugarization method, and then carrying out washing, drying and curing procedures by using clear water.
Example 7
Embodiment 7 of the present invention provides a bamboo desugaring method, comprising the following steps:
(1) bamboo wood pretreatment: cutting, breaking and defibering the collected bamboo wood for later use;
(2) and (3) adding the eutectic solvent into a horizontal digester, heating to 60 ℃, adding the bamboo wood obtained in the step (1) after the solvent is completely melted, and carrying out ultrasonic treatment for 30 hours.
In the step (2), the eutectic solvent is phenylacetic acid: choline chloride molar ratio 1: 1 eutectic solvent.
In the step (2), the ultrasonic frequency is 25 KHz.
In the step (2), the mass ratio of the bamboo wood to the eutectic solvent is 1: 10.
the embodiment 7 of the invention also provides a preparation method of the bamboo tows for the anticorrosive bamboo boards, which comprises the following steps: the bamboo strands for the anticorrosive bamboo board are prepared by carrying out desugarization treatment on bamboo by adopting the bamboo desugarization method, and then carrying out washing, drying and curing procedures by using clear water.
Example 8
Embodiment 8 of the present invention provides a bamboo desugaring method, comprising the following steps:
(1) bamboo wood pretreatment: cutting, breaking and defibering the collected bamboo wood for later use;
(2) and (3) adding the eutectic solvent into a horizontal digester, heating to 120 ℃, adding the bamboo wood obtained in the step (1) after the solvent is completely melted, and carrying out ultrasonic treatment for 5 hours.
In the step (2), the eutectic solvent is phenylacetic acid: choline chloride molar ratio 1: 1 eutectic solvent.
In the step (2), the ultrasonic frequency is 20 KHz.
In the step (2), the mass ratio of the bamboo wood to the eutectic solvent is 1: 3.5.
the embodiment 8 of the invention also provides a preparation method of the bamboo tows for the anticorrosive bamboo boards, which comprises the following steps: the bamboo strands for the anticorrosive bamboo board are prepared by carrying out desugarization treatment on bamboo by adopting the bamboo desugarization method, and then carrying out washing, drying and curing procedures by using clear water.
Performance evaluation
The bamboo filament bundles for the anti-corrosion bamboo boards prepared in the examples 1 to 8 are subjected to gum dipping treatment by adopting phenolic resin with the solid content of 60% and the viscosity of 220mpa.s, then dried to the water content of 10%, and finally pressed to prepare the bamboo boards.
1. Mildew resistance test
The bamboo boards obtained as described above were subjected to a mold resistance test in accordance with JIS Z2911-2010, and the test was observed for two weeks for the growth of a sterilized silk.
2. Mechanical properties of bamboo board
And (4) testing the mechanical properties of the obtained bamboo board according to GB/T17657 and 2013, and testing the elastic modulus and the static bending strength of the bamboo board.
The results are shown in Table 1.
Table 1 results of performance testing
According to experimental results, the bamboo desugaring method provided by the invention has a good desugaring effect, and the bamboo is treated by adopting the bamboo desugaring method provided by the invention, so that the better mechanical property of the bamboo can be ensured, the corrosion and mildew resistance of the bamboo can be effectively improved, and the bamboo desugaring method can be widely used for producing high-resistance outdoor landscape materials and indoor household materials. The bamboo filament bundle prepared by the preparation method is used for preparing the bamboo board, can meet the anti-corrosion requirement, and has excellent mechanical property.
The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. The use of some numerical ranges in the claims also includes sub-ranges within their range, and variations in these ranges are also to be construed as being covered by the appended claims where possible.
Claims (10)
1. A bamboo desugarization method is characterized by comprising the following steps:
(1) pretreating bamboo wood;
(2) and (2) adding the eutectic solvent into a horizontal digester, heating to 60-120 ℃, adding the bamboo wood obtained in the step (1) after the solvent is completely melted, and carrying out ultrasonic treatment for 5-30 h.
2. The bamboo desugaring method of claim 1, comprising the steps of:
(1) pretreating bamboo wood;
(2) and (2) adding the eutectic solvent into a horizontal digester, heating to 70-100 ℃, adding the bamboo wood obtained in the step (1) after the solvent is completely melted, and carrying out ultrasonic treatment for 10-20 hours.
3. The bamboo desugaring method according to claim 1 or 2, wherein in the step (2), the eutectic solvent is a choline eutectic solvent.
4. The bamboo desugaring method according to claim 3, characterized in that in step (2), the eutectic solvent is a choline-based eutectic solvent in which the hydrogen bond donor is carboxylic acid or polyhydric alcohol.
5. The bamboo desugaring method according to claim 4, wherein in the step (2), the eutectic solvent is selected from at least one of the following:
phenylacetic acid: choline chloride molar ratio 1: 1 eutectic solvent;
succinic acid: choline chloride molar ratio 1: 2, a eutectic solvent;
glycerol: choline chloride molar ratio 1: 2, a eutectic solvent;
ethylene glycol: choline chloride molar ratio 1: 2.
6. The bamboo desugaring method according to claim 1 or 2, characterized in that in the step (2), the ultrasonic frequency is 20-25 KHz.
7. The bamboo desugaring method of claim 6, wherein in the step (2), the ultrasonic frequency is 22 KHz.
8. The bamboo desugaring method according to claim 1 or 2, characterized in that in the step (2), the mass ratio of the bamboo to the eutectic solvent is 1: (3.5-10).
9. The bamboo desugaring method of claim 8, wherein in the step (2), the mass ratio of the bamboo to the eutectic solvent is 1: 3.5.
10. a preparation method of bamboo filament bundles for anticorrosive bamboo boards is characterized by comprising the following steps: the bamboo filament bundle for the antiseptic bamboo board is prepared by carrying out desugarization treatment on bamboo by adopting the bamboo desugarization method of claims 1-9 and then carrying out post-treatment.
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