CN110978183B - Preparation method of transparent bamboo wood and prepared transparent bamboo wood - Google Patents
Preparation method of transparent bamboo wood and prepared transparent bamboo wood Download PDFInfo
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- CN110978183B CN110978183B CN201911348070.5A CN201911348070A CN110978183B CN 110978183 B CN110978183 B CN 110978183B CN 201911348070 A CN201911348070 A CN 201911348070A CN 110978183 B CN110978183 B CN 110978183B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/16—Inorganic impregnating agents
- B27K3/20—Compounds of alkali metals or ammonium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
- B27K3/08—Impregnating by pressure, e.g. vacuum impregnation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
- B27K3/343—Heterocyclic 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
- B27K3/36—Aliphatic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/003—Treating of wood not provided for in groups B27K1/00, B27K3/00 by using electromagnetic radiation or mechanical waves
- B27K5/0055—Radio-waves, e.g. microwaves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/04—Combined bleaching or impregnating and drying of wood
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention provides a preparation method of transparent bamboo and the prepared transparent bamboo, wherein the preparation method utilizes the mixed solution of pure water, sodium chlorite and glacial acetic acid and a microwave treatment technology to remove lignin and colored groups in the bamboo, and the bamboo is soaked in epoxy resin impregnation liquid to prepare the transparent bamboo. The invention utilizes the conventional reagent to elute lignin under normal pressure, well preserves the layered structure of the bamboo tissue, improves the light transmittance of the bamboo and has excellent mechanical properties such as tensile strength.
Description
Technical Field
The invention relates to the field of novel bamboo technology development and modification, in particular to a preparation method of transparent bamboo and the prepared transparent bamboo.
Background
With the development of economy, energy consumption becomes a hot topic of current attention of people, and solving the problem of energy consumption is the current research direction. China is known as the "national degree of bamboo civilization" and is the country where bamboo is developed and utilized at the earliest. The bamboo is a characteristic natural renewable resource in China, has good mechanical and environmental characteristics, and is widely used in the industries of buildings, building materials, houses and the like, so that researchers modify the bamboo to obtain the bamboo with better physical and chemical properties along with the improvement of science and technology.
Disclosure of Invention
The invention mainly aims to overcome the defects in the prior art and provide a preparation method of transparent bamboo.
The invention also aims to provide the transparent bamboo product prepared by the method, and the prepared transparent bamboo product has the advantages of well-preserved layered structure, high mechanical strength of materials, good light transmission effect and wide application prospect in light-transmitting buildings, light-transmitting household products and the like.
The invention provides a preparation method of transparent bamboo wood, which comprises the following steps:
(1): selecting bamboo, and drying at the temperature of 100-105 ℃ for 12-24h for later use;
(2): soaking the bamboo materials dried in the step (1) in a mixed solution of pure water, sodium chlorite and glacial acetic acid at the temperature of 80-90 ℃ for 2-4h, and taking out the bamboo materials for later use after soaking;
(3): performing microwave treatment on the bamboo wood prepared in the step (2), setting microwave power and microwave time, repeating the microwave treatment twice under set conditions, and taking out the bamboo wood for later use after the microwave treatment is finished;
(4): soaking the bamboo wood prepared in the step (3) in the mixed solution obtained in the step (2) again at the soaking temperature of 80-90 ℃ for 1.5-3h, taking out the bamboo wood, washing the bamboo wood with distilled water, soaking the bamboo wood in absolute ethyl alcohol, setting the soaking temperature and the soaking time, and dehydrating to obtain a delignified bamboo template;
(5): vacuum drying the delignified bamboo template obtained in the step (4), and after the vacuum drying time is over, putting the delignified bamboo template into an epoxy resin dipping solution for vacuum dipping, and setting the vacuum dipping time;
(6): and (4) sealing and curing the bamboo material prepared in the step (5) at 15-30 ℃, and obtaining the transparent bamboo material after sealing and curing for 12-24 h.
Preferably, the bamboo material in the step (1) is any one of tabasheer, surf green, carbonized tabasheer and carbonized surf green, and the density of the bamboo material is 0.40-0.62 g/cm3。
Preferably, the mass ratio of sodium chlorite to pure water in the mixed solution in the step (2) is 1: 20-35.
Preferably, the pH of the mixed solution in the step (2) is 4 to 5.
Preferably, the microwave power in step (3) is 800W, and the microwave time is 5-15 s.
Preferably, the dipping temperature in the step (4) is 15-30 ℃, and the dipping time is 12-36 h.
Preferably, the vacuum drying time in the step (5) is 20-40min, and the vacuum impregnation time is 30-45 min.
Preferably, the epoxy resin impregnation solution in the step (5) comprises an epoxy resin and a curing agent.
Preferably, the mass ratio of the epoxy resin to the curing agent in the step (5) is 2: 1.
The invention also provides the transparent bamboo material prepared by the preparation method of the transparent bamboo material.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention utilizes the conventional reagent to elute lignin under normal pressure, well preserves the layered structure of the bamboo tissue, improves the light transmittance of the bamboo and has excellent mechanical properties such as tensile strength.
2. The invention has simple and environment-friendly process, the used polymer is green and pollution-free, and the prepared transparent bamboo material has higher optical transmittance and haze value and can be applied to the fields of light-transmitting buildings, light-transmitting household products and the like.
The foregoing is only an overview of the technical solutions of the present invention, and in order to more clearly understand the technical solutions of the present invention, the present invention is further described below with reference to the accompanying drawings.
Drawings
FIG. 1 is a flow chart of the preparation process of the present invention.
Detailed Description
In order to understand the present invention, the following examples are given to further illustrate the present invention. The light transmittance refers to the ability of light to transmit through a medium, and is the percentage of the luminous flux transmitted through a transparent or translucent body to the luminous flux incident thereon. Haze values refer to the percentage of transmitted light intensity that deviates from the incident by more than 2.5 degrees from the total transmitted light intensity.
Example 1
The invention provides a preparation method of transparent bamboo wood, which comprises the following steps:
(1): the density is selected to be 0.44g/cm3The tabasheer is dried for 15 hours at the temperature of 102 ℃ for standby;
(2): soaking the bamboo materials dried in the step (1) in a mixed solution of pure water, sodium chlorite and glacial acetic acid, wherein the mass ratio of the sodium chlorite to the pure water is 1:35, the pH value of the mixed solution is 4.6, the soaking temperature is 85 ℃, the soaking time is 2 hours, and taking out the bamboo materials for later use after the soaking is finished;
(3): performing microwave treatment on the bamboo wood prepared in the step (2), wherein the microwave power is 800W, the microwave time is 10s, repeating twice, and taking out the bamboo wood for later use after the microwave treatment is finished;
(4): soaking the bamboo wood prepared in the step (3) in the mixed solution obtained in the step (2) again at the soaking temperature of 85 ℃ for 2 hours, taking out the bamboo wood, washing the bamboo wood with distilled water, soaking the bamboo wood in absolute ethyl alcohol at the soaking temperature of 20 ℃ for 30 hours, and dehydrating to obtain a delignified bamboo template;
(5): vacuum drying the delignified bamboo template obtained in the step (4), after the vacuum drying time is 20min, putting the delignified bamboo template into an epoxy resin dipping solution for vacuum dipping for 30min, wherein the mass ratio of epoxy resin to a curing agent in the epoxy resin dipping solution is 2: 1;
(6): and (4) sealing and curing the bamboo material prepared in the step (5) at 15 ℃, and sealing and curing for 24 hours to obtain the transparent bamboo material.
Through testing, the transparent bamboo material prepared in the embodiment has the light transmittance of 76% and the haze value of 62%.
Example 2
The invention provides a preparation method of transparent bamboo wood, which comprises the following steps:
(1): selecting the density of 0.40g/cm3The carbonized tabasheer is dried for 12 hours at the temperature of 100 ℃ for standby;
(2): soaking the bamboo materials dried in the step (1) in a mixed solution of pure water, sodium chlorite and glacial acetic acid, wherein the mass ratio of the sodium chlorite to the pure water is 1:27, the pH value of the mixed solution is 4.7, the soaking temperature is 82 ℃, the soaking time is 2 hours, and taking out the bamboo materials for later use after the soaking is finished;
(3): performing microwave treatment on the bamboo wood prepared in the step (2), wherein the microwave power is 800W, the microwave time is 5s, repeating twice, and taking out the bamboo wood for later use after the microwave treatment is finished;
(4): soaking the bamboo wood prepared in the step (3) in the mixed solution obtained in the step (2) again at the soaking temperature of 82 ℃ for 1.5h, taking out the bamboo wood, washing the bamboo wood with distilled water, soaking the bamboo wood in absolute ethyl alcohol at the soaking temperature of 25 ℃ for 24h, and dehydrating to obtain a delignified bamboo template;
(5): vacuum drying the delignified bamboo template obtained in the step (4) for 25min, then placing the delignified bamboo template in an epoxy resin dipping solution for vacuum dipping for 35min, wherein the mass ratio of epoxy resin to a curing agent in the epoxy resin dipping solution is 2: 1;
(6): and (4) sealing and curing the bamboo material prepared in the step (5) at 20 ℃, and sealing and curing for 16 hours to obtain the transparent bamboo material.
Through testing, the transparent bamboo material prepared in the embodiment has the light transmittance of 80% and the haze value of 71%.
Example 3
The invention provides a preparation method of transparent bamboo wood, which comprises the following steps:
(1): selecting the density of 0.62g/cm3Drying the bamboo green at 105 ℃ for 12h for later use;
(2): soaking the bamboo materials dried in the step (1) in a mixed solution of pure water, sodium chlorite and glacial acetic acid, wherein the mass ratio of the sodium chlorite to the pure water is 1:20, the pH value of the mixed solution is 4.7, the soaking temperature is 90 ℃, the soaking time is 4 hours, and the bamboo materials are taken out for later use after the soaking is finished;
(3): performing microwave treatment on the bamboo wood prepared in the step (2), wherein the microwave power is 800W, the microwave time is 15s, repeating twice, and taking out the bamboo wood for later use after the microwave treatment is finished;
(4): soaking the bamboo wood prepared in the step (3) in the mixed solution obtained in the step (2) again at the soaking temperature of 90 ℃ for 3 hours, taking out the bamboo wood, washing the bamboo wood with distilled water, soaking the bamboo wood in absolute ethyl alcohol at the soaking temperature of 30 ℃ for 12 hours, and dehydrating to obtain a delignified bamboo template;
(5): vacuum drying the delignified bamboo template obtained in the step (4) for 40min, then placing the delignified bamboo template in an epoxy resin dipping solution for vacuum dipping for 35min, wherein the mass ratio of epoxy resin to a curing agent in the epoxy resin dipping solution is 2: 1;
(6): and (4) sealing and curing the bamboo material prepared in the step (5) at 30 ℃, and sealing and curing for 24 hours to obtain the transparent bamboo material.
Through testing, the transparent bamboo material prepared in the embodiment has the light transmittance of 62% and the haze value of 58%.
Example 4
The invention provides a preparation method of transparent bamboo wood, which comprises the following steps:
(1): selecting the density of 0.55g/cm3The carbonized bamboo green is dried for 24 hours at the temperature of 105 ℃ for standby;
(2): soaking the bamboo materials dried in the step (1) in a mixed solution of pure water, sodium chlorite and glacial acetic acid, wherein the mass ratio of the sodium chlorite to the pure water is 1:23, the pH value of the mixed solution is 5.0, the soaking temperature is 87 ℃, the soaking time is 3.5 hours, and taking out the bamboo materials for later use after the soaking is finished;
(3): performing microwave treatment on the bamboo wood prepared in the step (2), wherein the microwave power is 800W, the microwave time is 12s, repeating twice, and taking out the bamboo wood for later use after the microwave treatment is finished;
(4): soaking the bamboo wood prepared in the step (3) in the mixed solution obtained in the step (2) again at the soaking temperature of 87 ℃ for 3 hours, taking out the bamboo wood, washing the bamboo wood with distilled water, soaking the bamboo wood in absolute ethyl alcohol at the soaking temperature of 15 ℃ for 36 hours, and dehydrating to obtain a delignified bamboo template;
(5): vacuum drying the delignified bamboo template obtained in the step (4) for 35min, then placing the delignified bamboo template in an epoxy resin dipping solution for vacuum dipping for 45min, wherein the mass ratio of epoxy resin to a curing agent in the epoxy resin dipping solution is 2: 1;
(6): and (4) sealing and curing the bamboo material prepared in the step (5) at 20 ℃, and sealing and curing for 20 hours to obtain the transparent bamboo material.
Through testing, the transparent bamboo material prepared in the embodiment has the light transmittance of 71% and the haze value of 60%.
The light transmittance and haze values of the transparent bamboo materials prepared in different examples are different, and the results are shown in table 1.
TABLE 1
According to the invention, the bamboo is subjected to conventional drying treatment, the dried bamboo is soaked in a mixed solution of pure water, sodium chlorite and glacial acetic acid, and lignin in the bamboo is removed through subsequent steps such as microwave treatment and the like, and the transparent bamboo is prepared by utilizing an epoxy resin impregnation solution for vacuum infiltration. The transparent bamboo material prepared by the method has the advantages that the layered structure of the bamboo material structure is well preserved, and the mechanical properties such as tensile strength are better than before.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A preparation method of transparent bamboo wood is characterized by comprising the following steps: the method comprises the following steps:
(1): selecting bamboo, and drying at the temperature of 100-105 ℃ for 12-24h for later use;
(2): soaking the bamboo materials dried in the step (1) in a mixed solution of pure water, sodium chlorite and glacial acetic acid at the temperature of 80-90 ℃ for 2-4h, and taking out the bamboo materials for later use after soaking;
(3): performing microwave treatment on the bamboo wood prepared in the step (2), setting microwave power and microwave time, repeating the microwave treatment twice under set conditions, and taking out the bamboo wood for later use after the microwave treatment is finished;
(4): soaking the bamboo wood prepared in the step (3) in the mixed solution obtained in the step (2) again at the soaking temperature of 80-90 ℃ for 1.5-3h, taking out the bamboo wood, washing the bamboo wood with distilled water, soaking the bamboo wood in absolute ethyl alcohol, setting the soaking temperature and the soaking time, and dehydrating to obtain a delignified bamboo template;
(5): vacuum drying the delignified bamboo template obtained in the step (4), after the vacuum drying time is over, putting the delignified bamboo template into an epoxy resin dipping solution for vacuum dipping, setting the vacuum dipping time, and taking out the bamboo material for later use after the vacuum dipping is over;
(6): and (4) sealing and curing the bamboo material prepared in the step (5) at 15-30 ℃, and obtaining the transparent bamboo material after sealing and curing for 12-24 h.
2. The method for preparing transparent bamboo material according to claim 1, characterized in that: in the step (1), the bamboo material is any one of tabasheer, bamboo green, carbonized tabasheer and carbonized bamboo green, and the density of the bamboo material is 0.40-0.62 g/cm3。
3. The method for preparing transparent bamboo material according to claim 1, characterized in that: the mass ratio of the sodium chlorite to the pure water in the mixed liquid in the step (2) is 1: 20-35.
4. The method for preparing transparent bamboo material according to claim 1, characterized in that: the pH value of the mixed solution in the step (2) is 4-5.
5. The method for preparing transparent bamboo material according to claim 3, characterized in that: in the step (3), the microwave power is 800W, and the microwave time is 5-15 s.
6. The method for preparing transparent bamboo material according to claim 1, characterized in that: in the step (4), the dipping temperature is 15-30 ℃, and the dipping time is 12-36 h.
7. The method for preparing transparent bamboo material according to claim 1, characterized in that: in the step (5), the vacuum drying time is 20-40min, and the vacuum impregnation time is 30-45 min.
8. The method for preparing transparent bamboo material according to claim 1, characterized in that: the epoxy resin impregnation solution in the step (5) comprises epoxy resin and a curing agent.
9. The method for preparing transparent bamboo material according to claim 8, characterized in that: the mass ratio of the epoxy resin to the curing agent in the step (5) is 2: 1.
10. A transparent bamboo material prepared by the method of claim 1.
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| CN112356196A (en) * | 2020-10-30 | 2021-02-12 | 重庆大学 | Preparation method of high-performance bamboo steel composite material |
| CN113386223A (en) * | 2021-07-07 | 2021-09-14 | 中南林业科技大学 | Transparent bamboo material and preparation method and application thereof |
| CN114905589B (en) * | 2022-05-16 | 2023-07-07 | 南京林业大学 | Preparation method and application of transparent rattan fiber |
| CN114851323B (en) * | 2022-05-31 | 2022-10-25 | 南京林业大学 | Preparation method of high-strength flexible transparent bamboo material |
| CN116160526B (en) * | 2022-12-08 | 2023-10-20 | 中南林业科技大学 | Porous bamboo material with high adsorptivity and composite material thereof, and preparation method and application thereof |
| CN116277348B (en) * | 2023-03-21 | 2024-07-19 | 国际竹藤中心 | Thin bamboo bundle fiber laminated timber and preparation method thereof |
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| CN108656276B (en) * | 2018-04-18 | 2019-10-25 | 西南林业大学 | A kind of energy industrialized production and the cellulose skeleton material of application and preparation method thereof |
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Application publication date: 20200410 Assignee: GUANGDONG HOME YOUNG TECHNOLOGY Co.,Ltd. Assignor: NANJING FORESTRY University Contract record no.: X2021980009166 Denomination of invention: The invention relates to a preparation method of transparent bamboo and the prepared transparent bamboo Granted publication date: 20210427 License type: Common License Record date: 20210909 |
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Application publication date: 20200410 Assignee: DEHUA TB NEW DECORATION MATERIAL Co.,Ltd. Assignor: NANJING FORESTRY University Contract record no.: X2021980012711 Denomination of invention: The invention relates to a preparation method of transparent bamboo and the prepared transparent bamboo Granted publication date: 20210427 License type: Common License Record date: 20211117 |
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