CN114714451B - Manufacturing method of antibacterial environment-friendly bamboo plywood - Google Patents
Manufacturing method of antibacterial environment-friendly bamboo plywood Download PDFInfo
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- CN114714451B CN114714451B CN202210475218.7A CN202210475218A CN114714451B CN 114714451 B CN114714451 B CN 114714451B CN 202210475218 A CN202210475218 A CN 202210475218A CN 114714451 B CN114714451 B CN 114714451B
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- 235000017166 Bambusa arundinacea Nutrition 0.000 title claims abstract description 246
- 235000017491 Bambusa tulda Nutrition 0.000 title claims abstract description 246
- 241001330002 Bambuseae Species 0.000 title claims abstract description 246
- 235000015334 Phyllostachys viridis Nutrition 0.000 title claims abstract description 246
- 239000011425 bamboo Substances 0.000 title claims abstract description 246
- 239000011120 plywood Substances 0.000 title claims abstract description 47
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 58
- 239000000463 material Substances 0.000 claims abstract description 46
- 241000675108 Citrus tangerina Species 0.000 claims abstract description 31
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 28
- 238000001035 drying Methods 0.000 claims abstract description 20
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 36
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical class [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 35
- 239000001569 carbon dioxide Substances 0.000 claims description 18
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 18
- 238000005520 cutting process Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 9
- 244000302661 Phyllostachys pubescens Species 0.000 claims description 7
- 235000003570 Phyllostachys pubescens Nutrition 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 7
- 229910021641 deionized water Inorganic materials 0.000 claims description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Chemical compound [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- 238000009966 trimming Methods 0.000 claims description 4
- 229960000583 acetic acid Drugs 0.000 claims description 3
- YHWCPXVTRSHPNY-UHFFFAOYSA-N butan-1-olate;titanium(4+) Chemical compound [Ti+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] YHWCPXVTRSHPNY-UHFFFAOYSA-N 0.000 claims description 3
- 239000012362 glacial acetic acid Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000004094 surface-active agent Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 21
- 210000004027 cell Anatomy 0.000 description 20
- 239000003292 glue Substances 0.000 description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 229920002678 cellulose Polymers 0.000 description 5
- 239000001913 cellulose Substances 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 210000002421 cell wall Anatomy 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 210000004738 parenchymal cell Anatomy 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 231100000915 pathological change Toxicity 0.000 description 1
- 230000036285 pathological change Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 150000003608 titanium Chemical class 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
- B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
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- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
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- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
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- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
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- B27K9/00—Chemical or physical treatment of reed, straw, or similar material
- B27K9/002—Cane, bamboo
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/18—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by an internal layer formed of separate pieces of material which are juxtaposed side-by-side
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- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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- B32B7/03—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers with respect to the orientation of features
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- B32B9/047—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material made of fibres or filaments
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B27K2240/20—Removing fungi, molds or insects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a manufacturing method of an antibacterial environment-friendly bamboo plywood, and the manufactured antibacterial environment-friendly bamboo plywood comprises a decorative layer, a green skin bamboo layer, a non-woven fabric layer, a bamboo board layer, a non-woven fabric layer, a green skin bamboo layer and a decorative layer which are sequentially arranged, and is formed by gluing, pressing and drying; the decorative layer is connected with the green tangerine peel bamboo layer; the green tangerine peel bamboo layer is formed by sequentially arranging and gluing green tangerine peel bamboo materials; the non-woven fabric layer is glued with the green tangerine peel bamboo layer; the bamboo board layer is formed by vertically and horizontally arranging, overlapping and gluing modified bamboo boards, and the top and the bottom of the bamboo board layer are respectively glued with the non-woven fabric layer. Each layer has the antibacterial capability of the layer, and is not easily influenced by the change of external temperature and humidity.
Description
Technical Field
The application is a divisional application of Chinese patent application with the application date of 2021, 8 months and 28 days and the application number of 2021109993185, namely an antibacterial environment-friendly bamboo plywood.
Background
The plywood is divided into wood plywood, bamboo plywood and the like from raw materials, and the raw materials adopted by the plywood are timber and bamboo materials as the name implies.
The wood cost is high, the planting time is long, and the more the number of layers of the wood plywood is, the more expensive the price is. The bamboo material has wide planting range, strong growing capability and high growing speed in China, and the bamboo plywood is more and more widely used, especially in the industries of transportation and construction.
However, bamboo is a natural biomass material, which contains starch, reducing sugar, protein, fat, minerals, etc., and is easily decomposed by bacteria, etc., thereby becoming mildewed.
When the used bamboo plywood is rotten, the bamboo plywood can not realize the functions and can not be used, and becomes waste. Therefore, how to enhance the quality of the bamboo plywood is a direction that should be developed by those skilled in the art.
Disclosure of Invention
The invention discloses an antibacterial environment-friendly bamboo plywood, which is characterized in that the bamboo plywood is modified to effectively resist sudden changes of temperature and humidity and resist generation of bacteria and mould, the capacity is enhanced through regulation and control of nano titanium dioxide, pollution of formaldehyde and the like of glue required by gluing is reduced, and the bamboo plywood is suitable for popularization and use.
The invention relates to an antibacterial environment-friendly bamboo plywood which comprises a decorative layer, a green skin bamboo layer, a non-woven fabric layer, a bamboo board layer, a non-woven fabric layer, a green skin bamboo layer and a decorative layer which are sequentially arranged;
the decorative layer is connected with the green tangerine peel bamboo layer;
the green tangerine peel bamboo layer and the non-woven fabric layer are glued and fixed;
the bamboo board layer is formed by vertically and horizontally arranging, superposing and gluing modified bamboo boards, and the top and the bottom of the bamboo board layer are respectively connected with the non-woven fabric layer;
the modified bamboo board comprises the following manufacturing steps:
(1) Cutting off the bamboo for more than 3 years, splitting the bamboo, fixing the width and removing the joints, planing green and planing yellow, and fixing the length for cutting to flatten the bamboo to obtain a peeled bamboo;
(2) Arranging the peeled bamboo materials with gaps between the peeled bamboo materials, placing the peeled bamboo materials in a container, sealing, introducing supercritical carbon dioxide, slowly pressurizing to 20-35mPa, keeping the temperature at 60-80 ℃, treating for 20-35min, then reducing the pressure at the speed of 5-10mPa/min, releasing the sealing state after the pressure is normal pressure, and taking out the peeled bamboo materials;
(3) And (3) placing the peeled bamboo material into the modified nano titanium dioxide gel, sealing, pressurizing to 15-20mPa, keeping for 10-30 minutes, reducing the pressure at the speed of 5mPa/min, taking out and drying to obtain the modified bamboo board.
Preferably, the bamboo board is formed by vertically and horizontally arranging, stacking and gluing modified bamboo boards, and specifically comprises the following steps:
the modified bamboo boards are sequentially stacked in a longitudinal arrangement mode and a transverse arrangement mode, the number of layers is an odd number of layers, and the modified bamboo boards are formed by gluing and fixing.
Preferably, the flow rate of the supercritical carbon dioxide is 18-21m 3 /h。
Preferably, the manufacturing step of the green bamboo layer is as follows:
(A1) Cutting off the bamboo which is taken for more than 3 years after rotting;
(A2) Wiping the bamboo surface by using sponge in a deionized water pool, cleaning the surface skin, wherein the wiping force is that the joint of the sponge and the bamboo surface is basically not deformed, and then drying the bamboo surface;
(A3) Breaking bamboo materials according to the width size requirement, trimming bamboo joints and planing yellow, wherein the height of the trimmed bamboo joints is less than or equal to 2mm;
(A4) Sequentially arranging and gluing to obtain the green tangerine peel bamboo layer.
Preferably, the sponge is a low density sponge that does not substantially deform to an amount of deformation less than 1/3 of the thickness of the sponge.
Preferably, the length and the width of the green bamboo material and the non-woven fabric layer are both greater than the length and the width of the bamboo board layer.
Preferably, the non-woven fabric layer is composed of modified non-woven fabric,
and (3) soaking the non-woven fabric in the modified nano titanium dioxide gel for 5min, and drying to obtain the modified non-woven fabric.
Preferably, the bamboo is a moso bamboo.
Preferably, the modified nano titanium dioxide gel comprises the following preparation steps:
(B1) Taking tetrabutyl titanate of which the weight part is 1 and anhydrous ethanol of which the weight part is 2-4, and mixing and stirring for later use;
(B2) Uniformly mixing 0.5-0.8 part by weight of lithium nitrate acid, 0.03 part by weight of surfactant, 3-6 parts by weight of absolute ethyl alcohol, 1 part by weight of deionized water and 2 parts by weight of glacial acetic acid for later use;
and B1, mixing the standby materials obtained in the step B1 and the step B2 to obtain the modified nano titanium dioxide gel.
Preferably, the step of manufacturing the bamboo plywood comprises:
(C1) Sequentially gluing, hot-press molding and drying the decorative layer, the green tangerine peel bamboo layer and the non-woven fabric layer which are glued and fixed, the bamboo board layer, the green tangerine peel bamboo layer and the non-woven fabric layer which are glued and fixed and the decorative layer;
(C2) And cutting the redundant parts of the decorative layer, the green tangerine peel bamboo layer and the non-woven fabric layer to obtain the antibacterial environment-friendly bamboo plywood.
The invention discloses an antibacterial environment-friendly bamboo plywood which comprises a decorative layer, a green skin bamboo layer, a non-woven fabric layer, a bamboo board layer, a non-woven fabric layer, a green skin bamboo layer and a decorative layer which are sequentially arranged, wherein the green skin bamboo layer is firstly glued with the non-woven fabric layer, and then glued with the bamboo board layer in the middle layer and the decorative layer in the edge layer.
Because the peeled bamboo material of the bamboo board layer is modified, the parenchymal cells which are easy to generate mould inside are broken and flow out, and then the bamboo board is soaked in the modified nano titanium dioxide gel, and then the bamboo board is dried, exists in the forms of nano titanium dioxide and lithium ions and replaces the parenchymal cells, so that the formation of the mould is resisted, and the antibacterial effect of the bamboo plywood is realized.
Moreover, the nano titanium dioxide has the functions of sterilization, photocatalysis and formaldehyde removal, so that formaldehyde overflowing from the glue can be decomposed by the nano titanium dioxide in the production process and after production, the pollution is effectively reduced, and the environment-friendly plywood is realized.
Drawings
FIG. 1 is a schematic structural view of an antibacterial environment-friendly bamboo plywood of the present invention;
fig. 2 is a schematic view of a directional structure of an antibacterial environment-friendly bamboo plywood non-woven fabric layer according to the present invention.
Wherein the designations in the figure are as follows:
Detailed Description
The invention discloses an antibacterial environment-friendly bamboo plywood, which is characterized in that the bamboo plywood is modified to effectively resist sudden changes of temperature and humidity and resist generation of bacteria and mould, the capacity is enhanced through regulation and control of nano titanium dioxide, pollution of formaldehyde and the like of glue required by gluing is reduced, and the bamboo plywood is suitable for popularization and use.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-2, fig. 1 is a schematic structural view of an antibacterial environment-friendly bamboo plywood according to the present invention; fig. 2 is a schematic view of a directional structure of an antibacterial environment-friendly bamboo plywood non-woven fabric layer according to the present invention.
The number of bamboo board layers is set according to the actual situation, and fig. 2 is only for showing the structure.
The bamboo plywood has wide application range, can be used in construction and transportation, and is preferably used in scenes with fixed or standard bottom plates of various containers, packing cases, automobiles, trains, ships and the like.
The preferable use scenes are seriously examined on the temperature and the humidity of the plywood, for example, transportation in China is realized, the temperature and the humidity of the south and the north are different, transportation in a global range is realized, the temperature and the humidity are more obviously different, and therefore, besides the stable supporting force is required to be kept, the resistance of the plywood to the external environment is required to be enhanced.
The invention provides an antibacterial environment-friendly bamboo plywood, which comprises a decorative layer 1, a green skin bamboo layer 2, a non-woven fabric layer 3, a bamboo board layer 4, a non-woven fabric layer 3, a green skin bamboo layer 2 and the decorative layer 1 which are arranged in sequence;
the decorative layer 1 is connected with the green tangerine peel bamboo layer;
the green tangerine peel bamboo layer 2 and the non-woven fabric layer 3 are glued and fixed;
the bamboo board layer 4 is formed by vertically and horizontally arranging, overlapping and gluing modified bamboo boards, and the top and the bottom of the bamboo board layer are respectively connected with the non-woven fabric layer;
the modified bamboo board comprises the following manufacturing steps:
(1) Cutting off bamboo for more than 3 years, splitting the bamboo, fixing the width and removing joints, planing green and yellow, fixing the length and cutting to level the bamboo to obtain a peeled bamboo;
(2) Arranging the peeled bamboo materials with gaps between the peeled bamboo materials, placing the peeled bamboo materials in a container, sealing, introducing supercritical carbon dioxide, slowly pressurizing to 20-35mPa, keeping the temperature at 60-80 ℃, treating for 20-35min, then reducing the pressure at the speed of 5-10mPa/min, releasing the sealing state after the pressure is normal pressure, and taking out the peeled bamboo materials;
(3) And (3) placing the peeled bamboo material into the modified nano titanium dioxide gel, sealing, pressurizing to 15-20mPa, keeping for 10-30 minutes, reducing the pressure at the speed of 5mPa/min, taking out and drying to obtain the modified bamboo board.
Preferably, the bamboo board is formed by vertically and horizontally arranging, overlapping and gluing modified bamboo boards, and specifically comprises the following components:
the modified bamboo boards are sequentially stacked in a layer longitudinal arrangement mode and a layer transverse arrangement mode, the number of layers is odd, and the modified bamboo boards are formed by gluing and fixing.
Preferably, the bamboo is phyllostachys pubescens.
Preferably, the flow rate of the supercritical carbon dioxide is 18-21m 3 /h。
Preferably, the modified nano titanium dioxide gel comprises the following preparation steps:
(B1) Taking 1 weight part of tetrabutyl titanate and 2-4 weight parts of absolute ethyl alcohol, mixing and stirring for later use;
(B2) Uniformly mixing 0.5-0.8 parts by weight of lithium nitrate acid, 0.03 parts by weight of surfactant, 3-6 parts by weight of absolute ethyl alcohol, 1 part by weight of deionized water and 2 parts by weight of glacial acetic acid for later use;
and C, mixing the standby materials obtained in the step B1 and the step B2 to obtain the modified nano titanium dioxide gel.
The moso bamboo is one kind of bamboo, has long cultivation history, wide area, thick rod shape, evergreen all the year round and high growth speed in China.
The internal structure of moso bamboo contains abundant parenchyma cells and fibers.
Among them, the parenchyma cells mainly include starch, reducing sugar, protein, fat, mineral substances and the like, and the parenchyma cells are unstable, also called free water, and are easy to mildew due to external influence, and almost all the mildew problems of bamboo products are caused by the parenchyma cells.
The fiber, namely the cellulose, has a firm and stable molecular structure and belongs to bound water.
When the bamboo board (bamboo sheet) is used, the bamboo board is inevitably influenced by strong pressure, water soaking, cold and hot weather, and the external factors easily cause damage of thin-wall cells and mildew caused by contact with air. The mildew can not be found and treated in time, so the range of the mildew is larger and larger along with the influence of temperature and humidity, and finally the bamboo plywood is wasted.
In order to prevent the parenchyma cells from mildewing, the method of leading away the parenchyma cells is adopted, and then titanium dioxide is replaced into the bamboo board, so that the modified bamboo board is strong in antibacterial capability, the possibility that moisture and air are contacted with the bamboo board is locked, the bamboo board is difficult to mildew, the service life is long, and the modified bamboo board can adapt to different temperatures and humidity in a short time.
The bamboo board is produced through cutting peeled bamboo material, eliminating bamboo peel and bamboo yellow and modifying.
The peeled bamboo material is contacted with supercritical carbon dioxide, and pressurized and maintained in a sealed state, and the supercritical carbon dioxide permeates into cells of the peeled bamboo material, and then the pressure is suddenly and rapidly reduced.
Because the cell wall has the capability of retarding the diffusion of fluid, great pressure difference is formed inside and outside the cell wall instantly, the pressure difference can effectively break the cell wall of the parenchyma cell, namely, the wall breaking is all the parenchyma cell, namely, the free water structure, the internal structure of the peeled bamboo material is loose due to the pressure difference, and the fluid can flow out smoothly.
The residual of the outer layer of the peeled bamboo material without the parenchyma cells is almost all cellulose, the thickness of the cellulose cell wall is thick, and the bamboo material is not easy to damage, so the cellulose can still keep the original shape under the condition of pressure difference, and meanwhile, the cellulose is also one of substances capable of providing strong supporting force and toughness for the bamboo plywood.
The supercritical carbon dioxide can be prepared by compressing carbon dioxide, and is low in cost and easy to prepare.
When the peeled bamboo materials enter the sealed container, because the peeled bamboo materials are arranged, gaps are reserved among the bamboo materials, the supercritical carbon dioxide can be in contact with all plates, the efficiency can be ensured by controlling the flow of the supercritical carbon dioxide, and the peeled bamboo materials arranged in the container can be closely arranged according to the size of the container, so that the actually required amount of the supercritical carbon dioxide is not large.
And the supercritical carbon dioxide in the unsealed state can be volatilized into the air in the form of carbon dioxide, and the environment is not influenced.
Because the peeled bamboo material is destroyed by supercritical carbon dioxide, the parenchyma cells flow out along with the fluid and form a channel after flowing out, at the moment, the peeled bamboo material is placed in the modified nano titanium dioxide gel, the pressure is applied, so that nano titanium dioxide molecules of the modified nano titanium dioxide gel actively enter the channel, the time is kept, and then the pressure is quickly reduced. The nanometer titanium dioxide is not only attached to the surface of the peeled bamboo material, but also locked the part which is infiltrated into the peeled bamboo material, and the original parenchyma cell is replaced. And drying to obtain the modified bamboo board.
Because the surface of the modified bamboo board is filled with the nano titanium dioxide, although the inside of the peeled bamboo material is still provided with the parenchyma cells, the outer layer is locked by the nano titanium dioxide and is dried, so the inner parenchyma cells can not act with the air, and the mildew effect is effectively controlled.
And arranging the modified bamboo boards into odd rows in a longitudinal and transverse mode, and gluing. Namely, the base number layers are realized in a longitudinal direction, a transverse direction, a longitudinal direction and a transverse direction (8230) \ 8230;.
The gluing direction is that two sides of the bamboo board layer made of the modified bamboo board are respectively connected with the non-woven fabric layer.
The decorative layer is a common decorative layer sold on the market and is the prior art.
The modified nano titanium dioxide gel of the invention realizes the effect by combining lithium ions and nano titanium dioxide together.
The nano titanium dioxide has the advantages of limitation, large forbidden bandwidth, large energy required by electron transition and high requirement on wavelength, so that the activity of valence activated titanium is realized by doping the modified titanium dioxide with lithium ions, and the capability of the nano titanium dioxide can be effectively realized.
Except for replacing the parenchyma cells, the nano titanium dioxide can remove formaldehyde and the like, so that the glue of the bamboo plywood can effectively remove the formaldehyde, and the environment-friendly property of the bamboo plywood is realized.
Preferably, the manufacturing steps of the green tangerine peel bamboo layer are as follows:
(A1) Cutting off the bamboo which is taken for more than 3 years after rotting;
(A2) Wiping the bamboo surface by using sponge in a deionized water pool, cleaning the surface skin, wherein the wiping force is that the joint of the sponge and the bamboo surface is basically not deformed, and then drying the bamboo surface;
(A3) Breaking bamboo materials according to the width size requirement, trimming bamboo joints and planing yellow, wherein the height of the trimmed bamboo joints is less than or equal to 2mm;
(A4) Sequentially arranging and gluing to obtain the green tangerine peel bamboo layer.
Preferably, the sponge is a low density sponge that does not substantially deform to an amount of deformation less than 1/3 of the thickness of the sponge.
Preferably, the length and the width of the green tangerine peel bamboo material and the non-woven fabric layer are both greater than the length and the width of the bamboo board layer.
Preferably, the non-woven fabric layer is made of a modified non-woven fabric, and the non-woven fabric is soaked in the modified nano titanium dioxide gel for 5min and dried to obtain the non-woven fabric layer.
Preferably, the bamboo is moso bamboo.
The green skin layer of bamboo has oxidation resistance and acid oil, and thus is cleaned by a low-density sponge to remove dirt, but cannot remove substances on the surface thereof.
The purpose of correcting the height of bamboo joints to be less than or equal to 2mm is to store effective antioxidant and acid oil for the green tangerine peel bamboo.
The low density sponge has a hardness of less than 18d.
The green digging refers to removing the outer green of the bamboo; planing to yellow means planing off the inner side of the bamboo.
The manufacturing steps of the antibacterial environment-friendly bamboo plywood comprise:
(C1) Gluing the green tangerine peel bamboo layer and the non-woven fabric layer for later use, and gluing, hot-press forming and drying the decorative layer, the green tangerine peel bamboo layer and the non-woven fabric layer which are glued and fixed, the bamboo board layer, the green tangerine peel bamboo layer and the non-woven fabric layer which are glued and fixed and the decorative layer in sequence;
(C2) And cutting the redundant parts of the decorative layer, the green tangerine peel bamboo layer and the non-woven fabric layer to obtain the antibacterial environment-friendly bamboo plywood.
Wherein, hot press molding and drying are both the prior art.
The invention is described in detail below by means of a number of examples:
example 1
The preparation method of the antibacterial environment-friendly bamboo plywood comprises the following steps:
(1) Preparing a modified bamboo board: cutting 4-year-old moso bamboo, splitting the bamboo, fixing width and removing joints, planing green and planing yellow, fixing length and cutting to level the bamboo to obtain peeled bamboo;
arranging peeled bamboo materials with gap between them, placing in a container, sealing, introducing supercritical carbon dioxide with flow rate of 19m 3 Slowly pressurizing to 33mPa, keeping the temperature at 75 ℃, treating for 30min, then reducing the pressure at the speed of 8mPa/min, releasing the sealing state after the pressure is reduced to normal pressure, and taking out the peeled bamboo material;
placing the peeled bamboo material in modified nano titanium dioxide gel, sealing, pressurizing to 20mPa, keeping for 25 minutes, reducing pressure at the speed of 5mPa/min, taking out and drying to obtain a modified bamboo board;
and (3) arranging the modified bamboo boards longitudinally in a layer, transversely in a layer and longitudinally in a layer, and superposing, gluing and fixing for later use.
(2) Preparing a green-skin bamboo layer:
taking bamboo for more than 3 years, removing rot, and cutting;
wiping the bamboo surface by using low-density sponge in a deionized water pool, cleaning the surface skin, wherein the wiping force is that the joint of the sponge and the bamboo surface is basically not deformed (the deformation is less than 1/3 of the thickness of the sponge), and then drying the bamboo surface;
breaking bamboo materials according to the width size requirement, trimming bamboo joints and planing yellow, wherein the height of the trimmed bamboo joints is less than or equal to 2mm;
sequentially arranging and gluing to obtain a green tangerine peel bamboo layer for later use.
(3) Preparing a non-woven fabric layer: soaking the non-woven fabric in the modified nano titanium dioxide gel for 5min, and drying to obtain a modified non-woven fabric;
the modified non-woven fabric constitutes a non-woven fabric layer.
(4) And (4) gluing the green tangerine peel bamboo layer obtained in the step (3) and the non-woven fabric layer obtained in the step (4) for later use.
(5) And (3) gluing, hot-press forming and drying the decorative layer, the green-skin bamboo layer and the non-woven fabric layer in the step (4), the bamboo board layer in the step (1), the green-skin bamboo layer and the non-woven fabric layer in the step (4) and the decorative layer.
(6) And cutting the redundant parts of the decorative layer, the green tangerine peel bamboo layer and the non-woven fabric layer to obtain the antibacterial environment-friendly bamboo plywood.
Example 2
Essentially the same as in example 1, except that:
step (1):
the flow rate of supercritical carbon dioxide is 20m 3 Slowly pressurizing to 25mPa, keeping the temperature at 75 ℃, treating for 30min, and then reducing the pressure at the speed of 8 mPa/min;
pressurizing to 15mPa, keeping for 25 minutes, reducing the pressure at the speed of 5mPa/min, taking out and drying to obtain the modified bamboo board.
Example 3
Essentially the same as in example 1, except that:
step (1):
the flow rate of supercritical carbon dioxide is 28m 3 Slowly pressurizing to 25mPa, keeping the temperature at 60 ℃, treating for 30min, and then reducing the pressure at the speed of 8 mPa/min;
pressurizing to 15mPa, keeping for 25 minutes, reducing the pressure at the speed of 5mPa/min, taking out and drying to obtain the modified bamboo board.
Therefore, the parenchyma cells at the periphery of the modified bamboo board forming the bamboo board layer are replaced by the nano titanium dioxide, and after the modified bamboo board is dried, the replaced parenchyma cells are equal to the modified nano titanium dioxide which blocks the remained gaps after the parenchyma cells leave, so that air is difficult to enter the interior of the bamboo board and cannot change with the parenchyma cells, and therefore pathological changes and mildewing are not generated.
The glue used by any plywood has large specific gravity, formaldehyde is one of effective raw materials for gluing the glue, formaldehyde-free glue is difficult to replace, and the modified titanium dioxide has lithium ions, so the modified titanium dioxide is easy to activate under the action of the lithium ions, thereby realizing the functions of sterilizing and removing formaldehyde.
While the present invention has been described in detail with reference to the embodiments, those skilled in the art will appreciate that the various illustrative embodiments and applications of the present invention can be modified without departing from the spirit and scope of the present invention.
Claims (2)
1. The manufacturing method of the antibacterial environment-friendly bamboo plywood is characterized by comprising the following steps of:
gluing a green tangerine peel bamboo layer and a non-woven fabric layer for later use, and gluing, hot-press forming and drying a decorative layer, the green tangerine peel bamboo layer and the non-woven fabric layer which are glued and fixed, a bamboo board layer, the green tangerine peel bamboo layer and the non-woven fabric layer which are glued and fixed, and the decorative layer in sequence;
cutting the redundant parts of the decorative layer, the green tangerine peel bamboo layer and the non-woven fabric layer to obtain the antibacterial environment-friendly bamboo plywood;
the obtained antibacterial environment-friendly bamboo plywood comprises a decorative layer (1), a green skin bamboo layer (2), a non-woven fabric layer (3), a bamboo board layer (4), a non-woven fabric layer (3), a green skin bamboo layer (2) and the decorative layer (1) which are arranged in sequence;
the decorative layer is connected with the green tangerine peel bamboo layer;
the green tangerine peel bamboo layer and the non-woven fabric layer are glued and fixed;
the length and the width of the green tangerine peel bamboo layer and the non-woven fabric layer are both greater than those of the bamboo board layer;
the bamboo board layer is formed by vertically and horizontally arranging, stacking and gluing modified bamboo boards, wherein the modified bamboo boards are sequentially stacked in a layer longitudinal arrangement mode and a layer transverse arrangement mode, the number of layers is an odd number of layers and are fixed through gluing, and the top and the bottom of each layer are respectively connected with the non-woven fabric layer;
the modified bamboo board comprises the following manufacturing steps:
(1) Cutting off bamboo for more than 3 years, splitting the bamboo, fixing the width and removing joints, planing green and yellow, fixing the length and cutting to level the bamboo to obtain a peeled bamboo;
(2) Arranging the peeled bamboo materials with gaps between the peeled bamboo materials, placing in a container, sealing, and introducing at flow rate of 18-21m 3 Slowly pressurizing to 20-35mPa with supercritical carbon dioxide at 60-80 ℃ for 20-35min, reducing the pressure at the rate of 5-10mPa/min, releasing the sealing state after the pressure is normal, and taking out the peeled bamboo material;
(3) Placing the peeled bamboo material in modified nano titanium dioxide gel, sealing, pressurizing to 15-20mPa, keeping for 10-30 minutes, reducing pressure at the speed of 5mPa/min, taking out and drying to obtain a modified bamboo board;
the manufacturing steps of the green tangerine peel bamboo layer are as follows:
(A1) Cutting off the bamboo which is taken for more than 3 years after rotting;
(A2) Wiping the bamboo surface by using sponge in a deionized water pool, cleaning the surface skin, wherein the wiping force is that the joint of the sponge and the bamboo surface is basically not deformed, and then drying the bamboo surface;
(A3) Breaking bamboo materials according to the width size requirement, trimming bamboo joints and planing yellow, wherein the height of the trimmed bamboo joints is less than or equal to 2mm;
(A4) Sequentially arranging and gluing to obtain the green bamboo layers;
the non-woven fabric layer is formed by modified non-woven fabrics;
soaking the non-woven fabric in the modified nano titanium dioxide gel for 5min, and drying to obtain a modified non-woven fabric;
the modified nano titanium dioxide gel comprises the following preparation steps:
(B1) Taking 1 weight part of tetrabutyl titanate and 2-4 weight parts of absolute ethyl alcohol, mixing and stirring for later use;
(B2) Uniformly mixing 0.5-0.8 part by weight of lithium nitrate acid, 0.03 part by weight of surfactant, 3-6 parts by weight of absolute ethyl alcohol, 1 part by weight of deionized water and 2 parts by weight of glacial acetic acid for later use;
and B1, mixing the standby materials obtained in the step B1 and the step B2 to obtain the modified nano titanium dioxide gel.
2. The manufacturing method of antibacterial and environment-friendly bamboo plywood as claimed in claim 1, wherein the bamboo is moso bamboo.
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Denomination of invention: A manufacturing method for antibacterial and environmentally friendly bamboo plywood Granted publication date: 20230214 Pledgee: Agricultural Bank of China Renhua County Branch Pledgor: RENHUA AODA PLYWOOD Co.,Ltd. Registration number: Y2024980006799 |
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