阅读说明：本技术 一种抗菌环保竹胶合板 (Antibiotic environmental protection ply bamboo ) 是由 潘金闪 赵平 周文斌 潘源 于 2021-08-28 设计创作，主要内容包括：本发明公开了一种抗菌环保竹胶合板,包括依次设置的装饰层、青皮竹层、无纺布层、竹板层、无纺布层、青皮竹层和装饰层,经过胶合、压制、干燥而成；所述装饰层,与所述青皮竹层连接；所述青皮竹层,由青皮竹料依次排列胶合而成；所述无纺布层,与所述青皮竹层胶合；所述竹板层,由改性竹板纵横排列叠加胶合而成,顶部和底部分别与无纺布层胶合。每一层都有其自身的抗菌能力,不容易受外界温度、湿度变化而影响。(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, 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.)

1. An antibacterial environment-friendly bamboo plywood is characterized by comprising 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 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, 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.

2. The antibacterial environment-friendly bamboo plywood as claimed in claim 1, which is formed by vertically and horizontally arranging, superposing and gluing modified bamboo boards, and specifically comprises the following components:

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.

3. The antibacterial and environment-friendly bamboo plywood as claimed in claim 1, wherein the flow rate of supercritical carbon dioxide is 18-21m³/h。

4. The antibacterial environment-friendly bamboo plywood as claimed in claim 1, wherein the green husk bamboo layer is prepared by the following steps:

(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 2 mm;

(A4) sequentially arranging and gluing to obtain the green tangerine peel bamboo layer.

5. The antibacterial and environment-friendly bamboo plywood as claimed in claim 4, wherein the sponge is a low-density sponge which is not substantially deformed to 1/3 with the deformation amount smaller than the thickness of the sponge.

6. The antibacterial and environment-friendly bamboo plywood as claimed in claim 1, wherein the length and width of the green husk bamboo material and the non-woven fabric layer are both greater than the length and width of the bamboo ply layer.

7. The antibacterial and environment-friendly bamboo plywood as claimed in claim 1, wherein the non-woven fabric layer is formed of a modified non-woven fabric;

and soaking the non-woven fabric in the modified nano titanium dioxide gel for 5min, and drying to obtain the modified non-woven fabric.

8. The antibacterial and environment-friendly bamboo plywood as claimed in any one of claims 1-7, wherein the bamboo is moso bamboo.

9. The antibacterial environment-friendly bamboo plywood as claimed in any one of claims 1-7, wherein 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 B1, mixing the standby materials obtained in the step B2 to obtain the modified nano titanium dioxide gel.

10. The antibacterial and environment-friendly bamboo plywood as claimed in any one of claims 1-7, wherein 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.

Technical Field

The invention relates to the field of plywood, in particular to an antibacterial environment-friendly bamboo plywood.

Background

The plywood is characterized by comprising wood plywood, bamboo plywood and the like which are distinguished from raw materials, wherein the raw materials are timber and bamboo materials as the name suggests.

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 the bamboo plywood 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, 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, 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 18-21m³/h。

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 2 mm;

(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 1/3 where the amount of deformation is less than 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 composed of modified non-woven fabric,

and 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 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 B1, mixing the standby materials obtained in 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:

decorative layer 1, green skin bamboo layer 2, non-woven fabrics layer 3, bamboo clapper layer 4.

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 only for convenience in describing and simplifying 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 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 is to be noted that, unless otherwise explicitly specified or limited, 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 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.

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 buildings and transportation, and is preferably used in scenes with fixed or standard bottom plates of various containers, packing boxes, 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 sequentially arranged;

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, 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 bamboo is moso bamboo.

Preferably, the flow rate of the supercritical carbon dioxide is 18-21m³/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 B1, mixing the standby materials obtained in 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 chip) is used, the bamboo board (bamboo chip) is inevitably influenced by strong pressure, water soaking, cold weather and hot weather, and the external factors easily cause damage of thin-wall cells and mildew caused by contact with air. The mildew cannot be timely discovered and treated, so the mildew is in a wider range 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 cellulosic, the cellulosic cells have thick walls and are not easy to damage, so the cellulosic can still keep the original shape under the condition of pressure difference, and meanwhile, the cellulosic is also one of substances which can provide 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 the 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, pressurization is carried out, so that nano titanium dioxide molecules of the modified nano titanium dioxide gel actively enter the channel, the time is kept, and then rapid depressurization is carried out. 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, even though the inside of the peeled bamboo material still has the parenchyma cells, the outer layer of the peeled bamboo material is locked by the nano titanium dioxide and is dried, the parenchyma cells inside cannot react 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. That is, the basis number layers are implemented in a layer machine direction, a layer cross direction, a layer machine direction, a layer cross direction … ….

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 nanometer titanium dioxide has the advantages of limitation, large forbidden band width, large energy required by electron transition and high requirement on wavelength, so that the titanium dioxide is modified by doping lithium ions, the activity of valence activated titanium is achieved, and the capacity of the nanometer 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 2 mm;

(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 1/3 where the amount of deformation is less than 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 antioxidant and acid oil, so it is cleaned by low density sponge to remove dirt, but it cannot remove the substance on its surface.

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 18 d.

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 the width and removing joints, planing green and planing yellow, fixing the length and cutting to level the bamboo to obtain a peeled bamboo;

arranging peeled bamboo materials with gap between them, placing in a container, sealing, introducing supercritical carbon dioxide with flow rate of 19m³Slowly 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:

cutting off the bamboo which is taken for more than 3 years after rotting;

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 2 mm;

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 20m³Slowly 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 28m³Slowly 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 modified bamboo board forming the bamboo board layer has the advantages that the parenchyma cells on the periphery of the modified bamboo board 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 gaps left 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.