Preparation method of antibacterial and corrosion-resistant high-strength bamboo-based composite material

Abstract

The application discloses a preparation method of a high-strength bamboo-based composite material with antibacterial and corrosion resistance, which comprises the following steps: removing bamboo green and bamboo yellow from selected bamboo materials and cutting the bamboo materials into bamboo sections; removing nodes and peeling the bamboo sections; putting part of the bamboo sections into a reaction kettle; adding a lignin removing agent solution to completely immerse the bamboo sections; heating the bamboo sections under high temperature and high pressure until boiling for 10 minutes; naturally cooling the bamboo sections and cleaning the bamboo sections; adding water to completely immerse the bamboo sections again; adding hydrogen peroxide after 5 minutes; cleaning the bamboo sections after boiling; and reserving the bamboo sections for use, without processing the rest of the bamboo sections; drying and carbonizing the nodes and waste bamboo materials; calcining and processing the obtained bamboo charcoal to obtain bamboo vinegar and the like. The high-strength bamboo-based composite material with antibacterial and corrosion resistance and the preparation method thereof can solve the problems of bamboo corrosion and low strength, can process and utilize bamboo waste as raw materials, improve performance, reduce cost, and are safe and environmentally friendly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bamboo-based composite materials, in particular to a preparation method of an antibacterial and rot-resistant high-strength bamboo-based composite material. BACKGROUND

[0002] China is the country with the most abundant bamboo resources in the world, with the largest bamboo forest area, the most species and the largest reserves in the world. Bamboo is renewable, biodegradable and sustainable. There are 1642 species of bamboo in the world, of which 837 are in China. At present, the area of bamboo forest in China has exceeded 70 billion square meters, and it grows rapidly, has excellent physical and mechanical properties, and is of great ornamental value.

[0003] China is the country that first recognized and utilized bamboo in the world. Bamboo products have high value and are widely used, with more than 100 series and nearly 10,000 products, which are widely used in fields such as construction, decoration, furniture, papermaking, packaging, transportation, medicine, food, textiles, and chemical industry. However, due to the influence of various factors during growth and preservation, bamboo may have some defects, such as insect damage, water absorption, easy decay, easy delamination, easy cracking and easy bending, which may limit its practical application.

[0004] The method for antibacterial and rot-resistant bamboo is generally to coat the surface of bamboo board with chemical agents to kill or inhibit the growth and reproduction of bacteria. However, the chemical coating is generally toxic and harmful, or it will release harmful gases for a long time, and the coating is not uniform and cannot penetrate into the inside of the bamboo material. The adhesive method for bamboo is generally to press multiple layers of composite paste, which is easy to delaminate and fall off under heat or long-term storage or use, and is easy to deform and bend as a bamboo floor or bamboo wallboard. SUMMARY

[0005] This section aims to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, abstract and title, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0006] Therefore, the purpose of the present application is to provide an antibacterial and rot-resistant high-strength bamboo-based composite material and a preparation method thereof, to solve the problems of bamboo decay and low strength, and to use bamboo waste as raw material for processing and utilization, to improve performance, reduce cost and be safe and environmentally friendly.

[0007] To solve the above technical problems, according to one aspect of the present application, the present application provides the following technical scheme:

[0008] A preparation method of an antibacterial and rot-resistant high-strength bamboo-based composite material, comprising:

[0009] S1, removing the bamboo green and bamboo yellow from the selected bamboo and cutting it into bamboo sections, and then debarking and peeling the bamboo sections;

[0010] S2, part of the bamboo section is put into the reaction kettle, lignin removal agent solution is added to make the bamboo section completely immersed, high temperature and high pressure heating is carried out to boiling for 10 minutes, after natural cooling, the bamboo section is cleaned, water is added again to make the bamboo section completely immersed, hydrogen peroxide is added after 5 minutes, after boiling, the bamboo section is washed and reserved, and the rest of the bamboo section is not treated;

[0011] S3, the bamboo joints and waste bamboo materials are dried and carbonized, the bamboo charcoal obtained by carbonization is calcined and treated to obtain bamboo vinegar;

[0012] S4, the bamboo sections obtained in steps S1 and S2 are subjected to cooking under the conditions that the pressure range is 0.05-0.08 MPa and the temperature range is 95-110 DEG C, after 2-3 hours of cooking, the obtained bamboo sections are cleaned and dried;

[0013] S5, borax, diisopropyl phthalate, DCOIT, chlorothalonil and environmentally friendly adhesive are mixed in a certain order and proportion, and a pre-prepared liquid is obtained by stirring;

[0014] S6, the bamboo sections obtained after cooking in step S4 are put into a wood crusher to make bamboo powder, the length and thickness of the bamboo powder are controlled to a certain value during crushing, and then mixed with the pre-prepared liquid obtained in step S5, and a mixture is obtained by high-speed stirring;

[0015] S7, the mixture is laid and hot-pressed, polished after cooling and solidification, the bamboo vinegar is uniformly brushed on the bamboo-based composite material obtained after polishing every 2-3 hours, the brushing frequency is 12-15 times, and an antibacterial and corrosion-resistant high-strength bamboo-based composite material is obtained after standing and drying.

[0016] As a preferred scheme of the preparation method of the antibacterial and corrosion-resistant high-strength bamboo-based composite material, in step S1, the selected bamboo is Phyllostachys pubescens, and the age of the Phyllostachys pubescens is 3-5 years.

[0017] As a preferred scheme of the preparation method of the antibacterial and corrosion-resistant high-strength bamboo-based composite material, in step S2, the lignin removal agent solution is sodium bisulfite, sulfuric acid, choline chloride and ethylene glycol.

[0018] As a preferred scheme of the preparation method of the antibacterial and corrosion-resistant high-strength bamboo-based composite material, in step S2, the heating temperature is 150 DEG C, and the heating pressure is 0.2 MPa.

[0019] As a preferred scheme of the preparation method of the antibacterial and corrosion-resistant high-strength bamboo-based composite material, in the step S2, the partial bamboo section is one-third, and the remaining lignin mass accounts for 55%-70% of the total mass of the original bamboo section lignin.

[0020] As a preferred scheme of the preparation method of the antibacterial and corrosion-resistant high-strength bamboo-based composite material, in the step S3, the bamboo node is dried at 120 DEG C by smoking, pre-carbonized at 200 DEG C, carbonized at 330 DEG C, and treated to obtain bamboo vinegar.

[0021] As a preferred scheme of the preparation method of the antibacterial and corrosion-resistant high-strength bamboo-based composite material, in the step S5, the weight ratio of borax, diisopropyl phthalate, DCOIT, chlorothalonil and the environment-friendly adhesive is 5-75:1-2:7-19:15-40:20-40, and the environment-friendly adhesive is a soybean protein adhesive.

[0022] As a preferred scheme of the preparation method of the antibacterial and corrosion-resistant high-strength bamboo-based composite material, in the step S6, the length of the bamboo crushed material is 0-6 mm, and the thickness is 0-0.5 mm, and the water content of the bamboo crushed material is less than 3%.

[0023] As a preferred scheme of the preparation method of the antibacterial and corrosion-resistant high-strength bamboo-based composite material, in the step S6, the weight ratio of the bamboo crushed material to the prepared liquid is 1:1.

[0024] As a preferred scheme of the preparation method of the antibacterial and corrosion-resistant high-strength bamboo-based composite material, in the step S7, the days of standing and drying are more than 3 days.

[0025] Compared with the prior art, the present application has the beneficial effects that:

[0026] 1. The bamboo-based composite material prepared by the present application is non-volatile and does not produce toxic gas, has extremely high safety, perfectly uses all bamboo materials, has no bamboo waste, and has wide raw materials and low price, and the antibacterial effect is deeply combined into the composite material, the internal corrosion is prevented, the environment-friendly adhesive is added, the bamboo material is mixed with the antibacterial agent, and the strength of the composite material is increased.

[0027] 2. The present application mixes borax, diisopropyl phthalate, DCOIT and chlorothalonil in a certain order and proportion, stirs to obtain a prepared material, and mixes the prepared material with an environment-friendly adhesive, and fully stirs to obtain a formaldehyde-free antibacterial adhesive, so that the TVOC release amount is reduced.

[0028] 3, The obtained antibacterial and corrosion-resistant high-strength bamboo-based composite material can be used not only for bamboo furniture but also for floor base materials, can realize complete utilization of bamboo materials, realizes internal antibacterial and corrosion-resistant of bamboo materials, uses small particle bamboo chips and antibacterial agents, and environmental protection adhesive curing, solves the problems of easy peeling and delamination caused by multi-layer composite and pasting of bamboo-wood floor, and the problems of easy deformation caused by low strength and density, inhibits the growth of bacteria from the inside, is more durable, does not grow worms, and increases the service life. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the present application will be described in detail below in combination with the drawings and detailed embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0030] Figure 1 The flow chart of the preparation method of the antibacterial and corrosion-resistant high-strength bamboo-based composite material of the present application. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application will be described in detail below in combination with the drawings.

[0032] Secondly, the present application is described in detail in combination with the schematic diagram. In the detailed description of the embodiments of the present application, the cross-sectional view of the device structure will be partially enlarged without general proportion for the convenience of description, and the schematic diagram is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual manufacture.

[0033] In order to make the purposes, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below in combination with the drawings.

[0034] The present application provides an antibacterial and corrosion-resistant high-strength bamboo-based composite material and a preparation method thereof, to solve the problems of bamboo corrosion and low strength, and can use bamboo waste as raw material for processing and utilization, and improve the performance.

[0035] Example 1:

[0036] S1: Select 3-year-old bamboo, remove bamboo green and bamboo yellow, cut into bamboo sections, remove nodes and break the skin of the bamboo sections;

[0037] S2: Put one-third of the bamboo segments obtained in S1 into a reaction kettle, add a lignin removal agent solution to completely immerse the bamboo segments, heat to boiling at 150℃ and 0.2MPa for 10 minutes, naturally cool, clean the bamboo segments, add water again to completely immerse the bamboo segments, add hydrogen peroxide after 5 minutes and heat to boiling, then clean the bamboo segments for standby, and the remaining bamboo segments are not treated;

[0038] S3: Dry and carbonize the bamboo joints and waste bamboo materials, calcine and process the obtained bamboo charcoal to obtain bamboo vinegar;

[0039] S4: Perform steaming operation on the bamboo segments obtained in steps S1 and S2, the steaming pressure of the steaming operation is 0.05MPa, the steaming temperature of the steaming operation is 95℃, and the steaming time of the steaming operation is 2.5h, then clean and dry the obtained bamboo segments after the steaming operation;

[0040] S5: Mix borax, diisopropyl phthalate, DCOIT, chlorothalonil, and soybean protein adhesive in a ratio of 5:1:7:15:20, and obtain a pre-prepared material after rapid stirring for 10 minutes;

[0041] S6: Put the bamboo segments obtained in step S4 into a wood crusher to make bamboo powder, control the length of the bamboo powder to be 3mm and the thickness to be 0.3mm during crushing, the water content of the bamboo powder is less than 3%, then mix the bamboo powder with the pre-prepared liquid obtained in step S4, and obtain a mixture after high-speed stirring;

[0042] S7: Pave and hot-press the mixture, polish after cooling and solidification, evenly brush the bamboo vinegar on the obtained bamboo-based composite material every 2h after polishing, the brushing frequency is 12 times, and an antibacterial and corrosion-resistant high-strength bamboo-based composite material is obtained after standing and drying.

[0043] Example 2:

[0044] S1: Select 3-year-old bamboo, remove the green and yellow bamboo, and cut into bamboo segments, remove the joints and break the skin of the bamboo segments;

[0045] S2: Put one-third of the bamboo segments obtained in step S1 into a reaction kettle, add a lignin removal agent solution to completely immerse the bamboo segments, heat to boiling at 150℃ and 0.2MPa for 10 minutes, naturally cool, clean the bamboo segments, add water again to completely immerse the bamboo segments, add hydrogen peroxide after 5 minutes and heat to boiling, then clean the bamboo segments for standby, and the remaining bamboo segments are not treated;

[0046] S3: Dry and carbonize the bamboo joints and waste bamboo materials, calcine and process the obtained bamboo charcoal to obtain bamboo vinegar;

[0047] S4: The bamboo segments obtained in steps S1 and S2 are subjected to a steaming operation, the steaming pressure of the steaming operation is 0.08 MPa, the steaming temperature of the steaming operation is 110°C, the steaming time of the steaming operation is 3h, and the bamboo segments obtained after the steaming operation are cleaned and dried;

[0048] S5: Borax, diisopropyl phthalate, DCOIT, chlorothalonil, and soybean protein adhesive are mixed in a ratio of 75:2:19:40:40, and a pre-prepared material is obtained after rapid stirring for 10 min;

[0049] S6: The bamboo segments obtained after the steaming operation in step S4 are fed into a wood chipper to form bamboo chips, the length of the bamboo chips is controlled to be 3 mm and the thickness is controlled to be 0.3 mm during the crushing, the water content of the bamboo chips is less than 3%, and then the bamboo chips are mixed with the pre-prepared liquid obtained in step S4 to obtain a mixture after high-speed stirring;

[0050] S7: The mixture is laid and hot-pressed, and after cooling and solidification, polishing is performed, the bamboo-based composite material obtained after polishing is evenly brushed with bamboo vinegar liquid every 3h, the brushing frequency is 15 times, and an antibacterial and corrosion-resistant high-strength bamboo-based composite material is obtained after standing and drying.

[0051] Example 3:

[0052] S1: Select 3-year-old bamboo and remove the green and yellow parts, cut into segments, and remove the nodes and peel the segments;

[0053] S2: One-third of the bamboo segments obtained in step S1 are placed in a reaction kettle, a lignin removal agent solution is added to completely immerse the bamboo segments, heated to boiling at 150°C and 0.2 MPa for 10 minutes, naturally cooled, washed clean, and then completely immersed in water again, heated to boiling after 5 minutes, and then washed clean for standby, and the remaining bamboo segments are not treated;

[0054] S3: Dry and carbonize the bamboo joints and waste bamboo materials, calcine and process the obtained bamboo charcoal to obtain bamboo vinegar liquid;

[0055] S4: The bamboo segments obtained in steps S1 and S2 are subjected to a steaming operation, the steaming pressure of the steaming operation is 0.08 MPa, the steaming temperature of the steaming operation is 110°C, the steaming time of the steaming operation is 3h, and the bamboo segments obtained after the steaming operation are cleaned and dried;

[0056] S5: Borax, diisopropyl phthalate, DCOIT, chlorothalonil, and soybean protein adhesive are mixed in a ratio of 75:2:19:40:40, and a pre-prepared material is obtained after rapid stirring for 10 min;

[0057] S6: Put the bamboo segments obtained after the cooking operation of step S4 into a wood chipper to make bamboo chips, control the length of the bamboo chips to be 3mm and the thickness to be 0.3mm during the crushing, the water content of the bamboo chips is less than 3%, then mix the bamboo chips with the pre-prepared liquid obtained in step S4, and obtain the mixture by high-speed stirring;

[0058] S7: Lay and hot-press the mixture, polish after cooling and solidification, evenly brush the bamboo vinegar liquid on the bamboo-based composite material obtained after polishing every 2.5h, the brushing frequency is 15 times, and the antibacterial and corrosion-resistant high-strength bamboo-based composite material is obtained after standing and drying.

[0059] Example 4:

[0060] S1: Select 3-year-old bamboo and remove the green and yellow bamboo, cut into bamboo segments, remove the nodes and break the skin of the bamboo segments;

[0061] S2: Put one-third of the bamboo segments obtained in step S1 into a reaction kettle, add a lignin removal agent solution to completely immerse the bamboo segments, heat to boiling at 150℃ and 0.2MPa for 10 minutes, naturally cool, wash the bamboo segments, immerse the bamboo segments in water again, add hydrogen peroxide after 5 minutes and heat to boiling, then wash the bamboo segments and reserve them for use, and the remaining bamboo segments are not treated;

[0062] S3: Dry and carbonize the bamboo joints and waste bamboo materials, calcine and process the bamboo charcoal obtained by carbonization to obtain bamboo vinegar liquid;

[0063] S4: Perform a cooking operation on the bamboo segments obtained in steps S1 and S2, the cooking pressure of the cooking operation is 0.07MPa, the cooking temperature of the cooking operation is 100℃, and the cooking time of the cooking operation is 2.5h, and the bamboo segments obtained after the cooking operation are washed and dried;

[0064] S5: Mix borax, diisopropyl phthalate, DCOIT, chlorothalonil, and soybean protein adhesive in the ratio of 35:1:12:25:30, and obtain the pre-prepared material after rapid stirring for 10 minutes;

[0065] S6: Put the bamboo segments obtained after the cooking operation of step S4 into a wood chipper to make bamboo chips, control the length of the bamboo chips to be 1mm and the thickness to be 0.01mm during the crushing, the water content of the bamboo chips is less than 3%, then mix the bamboo chips with the pre-prepared liquid obtained in step S4, and obtain the mixture by high-speed stirring;

[0066] S7: Lay and hot-press the mixture, polish after cooling and solidification, evenly brush the bamboo vinegar liquid on the bamboo-based composite material obtained after polishing every 2.5h, the brushing frequency is 15 times, and the antibacterial and corrosion-resistant high-strength bamboo-based composite material is obtained after standing and drying.

[0067] Example 5:

[0068] S1: select 3 years of bamboo to remove green bamboo, yellow bamboo, cut into bamboo segments, remove the node and break the skin of the bamboo segments;

[0069] S2: one third of the bamboo segments obtained in step S1 is cut off and put into a reaction kettle, a lignin removal agent solution is added to completely immerse the bamboo segments, heated to boiling at 150°C and 0.2MPa for 10 minutes, naturally cooled, washed the bamboo segments, completely immersed in water again, added hydrogen peroxide after 5 minutes and heated to boiling, then washed the bamboo segments for standby, and the remaining bamboo segments are not treated;

[0070] S3: dry and carbonize the bamboo node and waste bamboo material, calcine and process the obtained bamboo charcoal to obtain bamboo vinegar;

[0071] S4: the bamboo segments obtained in steps S1 and S2 are subjected to a cooking operation, the cooking pressure of the cooking operation is 0.06MPa, the cooking temperature of the cooking operation is 100°C, and the cooking time of the cooking operation is 2.5h, and the bamboo segments obtained after the cooking operation are washed and dried;

[0072] S5: borax, diisopropyl phthalate, DCOIT, chlorothalonil, and soybean protein adhesive are mixed in the ratio of 35:1:12:25:30, and a preformed material is obtained after rapid stirring for 10 minutes;

[0073] S6: the bamboo segments obtained after the cooking operation in step S4 are put into a wood crusher to make bamboo fragments, the length of the bamboo fragments is controlled to be 6mm and the thickness is controlled to be 0.5mm during crushing, the water content of the bamboo fragments is less than 3%, and then the bamboo fragments are mixed with the preformed liquid obtained in S4 to obtain a mixture by high-speed stirring;

[0074] S7: the mixture is laid and hot-pressed, polished after cooling and solidification, the bamboo vinegar is uniformly brushed on the bamboo-based composite material obtained after polishing every 2h, the brushing frequency is 12 times, and an antibacterial and corrosion-resistant high-strength bamboo-based composite material is obtained after standing and drying.

[0075] In order to verify the effectiveness of the present application by scientific means, the following 9 comparative examples are set based on example 3, wherein:

[0076] The difference between comparative example 1 and example 3 is that step S2 selects 70% of the bamboo segments to remove lignin, and the remaining steps are the same as example 3.

[0077] The difference between comparative example 2 and example 3 is that the cooking pressure in step S4 is 0.03MPa, the cooking temperature is 75°C, and the cooking time is 3.5h, and the remaining steps are the same as example 3.

[0078] The difference between Comparative Example 3 and Example 3 is that in step S4, the cooking pressure is 0.08 MPa, the cooking temperature is 125℃, and the cooking time is 1.5 h, and the other steps are the same as those in Example 3.

[0079] The difference between Comparative Example 4 and Example 3 is that in step S5, borax, diisopropyl phthalate, DCOIT, chlorothalonil, and soybean protein adhesive are mixed in a ratio of 75:3:25:45:50, and the other steps are the same as those in Example 3.

[0080] The difference between Comparative Example 5 and Example 3 is that in step S5, borax, diisopropyl phthalate, DCOIT, chlorothalonil, and soybean protein adhesive are mixed in a ratio of 5:1:3:10:20, and the other steps are the same as those in Example 3.

[0081] The difference between Comparative Example 6 and Example 3 is that in step S6, the length of the bamboo chips is 10 mm, and the thickness is 1 mm, and the other steps are the same as those in Example 3.

[0082] The difference between Comparative Example 7 and Example 3 is that in step S6, the moisture content of the bamboo chips is 7%, and the other steps are the same as those in Example 3.

[0083] The difference between Comparative Example 8 and Example 3 is that in step S6, the weight ratio of bamboo chips to pre-prepared liquid is 1:2, and the other steps are the same as those in Example 3.

[0084] The difference between Comparative Example 9 and Example 3 is that in step S7, the bamboo vinegar solution is evenly brushed every 4 h, and the brushing frequency is 17 times, and the other steps are the same as those in Example 3.

[0085] The results of Examples 1-5 and Comparative Examples 1-9 are shown in Table 1

[0086] Table 1

[0087]

[0088]

[0089] As can be seen from the above table, the present application can significantly improve the antibacterial and corrosion resistance of bamboo-based composite materials, and the steps are closely related to each other, and changing the dosage of any step will result in a significant decrease in the corrosion and mildew resistance and strength of the bamboo material.

[0090] Although the present application has been described with reference to the embodiments above, various changes and modifications can be suggested to one skilled in the art, and it is intended that the present application encompass such changes and modifications as fall within the scope of the appended claims. Particularly, each feature disclosed in the description and / or the claims can be used in the combination with each of the features disclosed in the description and / or the claims, unless specifically stated otherwise. Therefore, the present application is not intended to be limited to the particular embodiments disclosed in the description and / or the claims.

Claims

1. A method for preparing an antibacterial, corrosion-resistant, high-strength bamboo-based composite material, characterized in that, The application relates to a bamboo-based composite material and a preparation method thereof. S1, bamboo is selected, and the bamboo is removed of green bamboo and yellow bamboo, and is cut into bamboo sections, and then the bamboo sections are debarked and peeled; S2, part of the bamboo sections are put into a reaction kettle, a lignin removing agent solution is added to completely immerse the bamboo sections, high-temperature and high-pressure heating is carried out to reach boiling for 10 minutes, the bamboo sections are cleaned after natural cooling, water is added again to completely immerse the bamboo sections, hydrogen peroxide is added after 5 minutes, the bamboo sections are cleaned after boiling, and the remaining bamboo sections are not treated, wherein the part of the bamboo sections is one third, and the remaining lignin accounts for 55%-70% of the total mass of the original lignin of the bamboo sections; S3, the bamboo joints and waste bamboo materials are dried and carbonized, bamboo charcoal obtained through carbonization is calcined and treated to obtain bamboo vinegar; S4, the bamboo sections obtained in steps S1 and S2 are subjected to cooking under the conditions that the pressure ranges from 0.05 MPa to 0.08 MPa and the temperature ranges from 95 DEG C to 110 DEG C, the bamboo sections are cleaned and dried after cooking for 2-3 hours; S5, borax, diisopropyl phthalate, DCOIT, chlorothalonil and an environment-friendly adhesive are mixed in the weight ratio of 5-75:1-2:7-19:15-40:20-40 in sequence, and a prepared liquid is obtained through stirring; S6, the bamboo sections obtained through cooking in step S4 are put into a wood crusher to be crushed into bamboo fragments, the length and thickness of the bamboo fragments are controlled to reach a certain value during crushing, and then the bamboo fragments are mixed with the prepared liquid obtained in step S5 to obtain a mixture through high-speed stirring; S7, the mixture is laid and hot-pressed, and is polished after cooling and solidification, the bamboo-based composite material obtained after polishing is evenly brushed with bamboo vinegar every 2-3 hours, the brushing frequency is 12-15 times, and an antibacterial and corrosion-resistant high-strength bamboo-based composite material is obtained through standing and drying.

2. The method for preparing an antibacterial, corrosion-resistant, and high-strength bamboo-based composite material according to claim 1, characterized in that, In step S1, the selected bamboo is Phyllostachys pubescens, and the age of the Phyllostachys pubescens is 3-5 years.

3. The method for preparing an antibacterial, corrosion-resistant, and high-strength bamboo-based composite material according to claim 1, characterized in that, In step S2, the lignin removing agent solution is a mixture of sodium bisulfite, sulfuric acid, choline chloride and ethylene glycol.

4. The method for preparing an antibacterial, corrosion-resistant, and high-strength bamboo-based composite material according to claim 1, characterized in that, In step S2, the heating temperature is 150 DEG C, and the heating pressure is 0.2 MPa.

5. The method for preparing an antibacterial, corrosion-resistant, and high-strength bamboo-based composite material according to claim 1, characterized in that, In step S3, the bamboo joints are dried through fumigation drying at 120 DEG C, pre-carbonization is carried out at 200 DEG C, carbonization is carried out at 330 DEG C, and bamboo vinegar is obtained through treatment.

6. The method for preparing an antibacterial, corrosion-resistant, and high-strength bamboo-based composite material according to claim 1, characterized in that, The environment-friendly adhesive is a soybean protein adhesive.

7. The method for preparing an antibacterial, corrosion-resistant, and high-strength bamboo-based composite material according to claim 1, characterized in that, In step S6, the length of the bamboo fragments is 0-6 mm, the thickness is 0-0.5 mm, and the water content of the bamboo fragments is lower than 3%.

8. The method for preparing an antibacterial, corrosion-resistant, and high-strength bamboo-based composite material according to claim 1, characterized in that, In step S6, the weight ratio of the bamboo fragments to the prepared liquid is 1:

1.

9. The method for preparing an antibacterial, corrosion-resistant, and high-strength bamboo-based composite material according to claim 1, characterized in that, In S7, the standing and drying time is more than 3 days.

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