Preparation method of deep brown thin bamboo silk for bamboo weaving on porcelain body

Abstract

The application discloses a preparation method of dark brown thin bamboo silk for bamboo-weaving of a porcelain body, and relates to the technical field of environment-friendly composite materials. The acid-alkali-neutralization-oil tanning-carbonization multi-process synergistic treatment is used to realize multiple protection functions while maintaining the appearance of natural bamboo fibers, realize mildew resistance, enhance toughness, significantly improve bending resistance, and greatly reduce water absorption. The natural dark brown is obtained without using dyes, and the stable dark brown smooth aesthetic effect is given to the thin bamboo silk.

Description

Technical Field

[0001] This invention relates to the field of environmentally friendly composite materials technology, and in particular to a method for preparing dark brown fine bamboo filaments for ceramic-bodied bamboo weaving. Background Technology

[0002] In daily porcelain-bodied bamboo weaving, most bamboo weavers use flat, fine bamboo strips of 0.45mm*0.18mm, commonly known in the industry as No. 4 strips. A small number use No. 3 strips, with dimensions of 0.5mm*0.22mm, or No. 5 strips, with dimensions of 0.42mm*0.16mm. In this article, we will refer to them all as fine bamboo strips for porcelain-bodied bamboo weaving. Apart from artificial dyeing, fine bamboo strips for porcelain-bodied bamboo weaving are further divided into two natural-colored bamboo strips: unbleached bamboo strips and brown bamboo strips. The dark brown bamboo strips mentioned in this article refer to dark brown carbonized fine bamboo strips.

[0003] Traditional fine bamboo strips used for bamboo weaving on porcelain are susceptible to dampness, mold, insect infestation, and corrosion; they also lack flexibility and are prone to breakage during weaving; the dark brown fine bamboo strips produced by traditional methods are not deep or vibrant in color, and are prone to fading and discoloration after being dyed dark brown; after weaving, they are not firmly attached to the porcelain and are prone to separating and falling off; they also have low tensile strength.

[0004] Existing bamboo fiber processing techniques for porcelain-bodied bamboo weaving mostly employ single chemical treatments or simple boiling and drying, resulting in brittle bamboo fibers and uneven coloring. These techniques fail to meet the weaving and durability requirements of high-end bamboo weaving and porcelain-bodied bamboo weaving handicrafts. Furthermore, traditional bamboo fiber processing techniques have multiple defects:

[0005] 1. Single chemical treatment (such as acid etching or alkali boiling only) leads to fiber embrittlement or incomplete protection;

[0006] 2. The separation of dyeing and protection results in both fading and insect infestation problems.

[0007] 3. Fine bamboo fibers colored with chemical dyes are prone to fading, and the color is not deep or bright enough; moreover, they do not meet environmental protection requirements.

[0008] 4. The dark brown bamboo fibers produced by traditional methods suffer from deep carbonization, which damages their toughness (e.g., long-term treatment at >200℃).

[0009] 5. The weaving process is fragile and easily broken. Traditional bamboo strips can withstand an average of less than 10 bends when weaving and bending (radius of curvature R = 50mm).

[0010] 6. The bamboo strips and porcelain are woven together by hand, which results in a loose fit and easy detachment.

[0011] 7. Bamboo fibers are prone to mold and will turn black with prolonged use. After being placed for 7 days under conditions of humidity >85% and temperature 28℃, obvious mold spots appeared on the surface of traditional bamboo fibers.

[0012] Industry pain points: Although existing technologies employ repeated alkali boiling and drying, they do not solve the aforementioned problems, resulting in a compromise in performance. Everyday porcelain-bodied bamboo weaving requires extremely high standards for flexibility, bending resistance, strength, and dimensional stability (shrinkage rate). The close bonding between the fine bamboo strips and the porcelain body is the core technological challenge and key to quality in porcelain-bodied bamboo weaving. The uniformity of natural brown color and the gloss (silky feel) are important aesthetic values ​​of high-end porcelain-bodied bamboo weaving handicrafts, all of which far exceed the requirements of ordinary bamboo products. Summary of the Invention

[0013] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a method for preparing dark brown fine bamboo filaments for porcelain-bodied bamboo weaving, so as to solve the problems mentioned in the background art.

[0014] To achieve the above objectives, the present invention provides the following technical solution: a method for preparing dark brown fine bamboo fibers for porcelain-bodied bamboo weaving, comprising the following steps:

[0015] (1) Pretreatment: Select bamboo material and perform the following steps in sequence: scraping (retaining a bamboo surface layer thickness of 0.2mm-0.3mm), splitting bamboo (split longitudinally into bamboo strips 20-30mm wide), and drying bamboo (sun-drying for 5-7 days until the moisture content is 16%-20%, paying attention to rain and moisture prevention);

[0016] (2) High-temperature boiling: Immerse bamboo strips in a composite anti-mildew and insect-repellent liquid, boil for 180 minutes at 95-100℃ and 50-70kPa, slowly release the pressure (>20 minutes), and then let them cool naturally to below 40℃. After removal, let them dry slowly at 30-60℃ (>48 hours). The composite anti-mildew and insect-repellent liquid is composed of 0.5% Jianis Bamboo Protection No. 2, 0.3% Bachmann 40L and 99.2% water.

[0017] (3) Strong acid oxidation and shaping: Apply a composite acid solution (20% nitric acid + 3% oxalic acid + 77% water) to the surface of the bamboo strips, with a coverage rate of ≥99%. After standing for 40-50 seconds, quickly proceed to the high-temperature light carbonization process.

[0018] (4) Instantaneous light carbonization: Within 40-50 seconds after the treatment in step (3), place the bamboo strip 5cm above the open flame of charcoal fire above 1000℃ for ≤1 second to form a micro carbonization protective layer of ≤5μm, and let it stand for 4 hours.

[0019] (5) Strong alkali neutralization and degreasing: Immerse the bamboo strips in a compound solution of 90% saturated lime water and 2% 20mol / L NaOH, add water to adjust the pH to 12.6-13.2, soak for 0.5 hours at 25-35℃, take them out and rinse with water until the pH is 6.8-7.4, then take the first layer of bamboo skin (0.16-0.22mm) and thin it to the target thickness (error ±0.01mm);

[0020] (6) Fine strip cutting: The bamboo strips are cut into strips 0.45-0.55mm wide, softened by kneading, and then pulled into even strips;

[0021] (7) Impregnation with composite silicone emulsion and special polymer: Add sodium bicarbonate to adjust the pH of the water to 7.6-8.0, add 12% of polymer and special oil mixture (such as Honglin Chemical WR-2011) and 8% of organosilicon emulsifier (such as Honglin Chemical S-33), immerse the bamboo fibers in the composite solution at 55-60℃ for ≥48 hours, cool naturally and slowly, add dilute acetic acid to adjust the pH to 6.5-6.8, add 3% zirconium acetate ion fixation for 30 minutes, take out and let stand for 24 hours;

[0022] (8) Atmospheric pressure high temperature oily molecular penetration: Place bamboo strips 10 cm above a mixed solution of 50% CHEMOL-199S and 50% butyl acetate from Honglin Chemical. The solution is heated with an electric heating mantle, from 50℃ to 90℃ at a rate of 20±2℃ / h, and then to 100℃ at the same rate. The solution is kept at 98-103℃ for 30±5 minutes. Then the temperature is gradually reduced (100℃→80℃, rate 20±2℃ / h; 80℃→50℃, rate 10±1℃ / h) to 35±5℃ and soaked for 70 hours. The bamboo strips are then removed and air-dried (30±5℃, humidity ≤60%, ≥72 hours).

[0023] (9) Waterproof and dustproof treatment: The bamboo fibers are brushed or soaked with Honglin Chemical JS-593 solvent-based water-repellent agent.

[0024] (10) Post-weaving treatment: After weaving, bake the ceramic-bodied bamboo woven product in an oven at 120℃-130℃ for 30 minutes; after cooling naturally at room temperature, take it out and let it stand.

[0025] Preferably, the specific method of low-temperature slow drying in step (2) is: continuous ventilation and drying in an environment of 30-60℃, and avoiding direct sunlight during the drying process.

[0026] Preferably, the temperature of the composite acid solution in step (3) is controlled at 20-30℃, and the acid solution is ensured to be in complete contact with the surface of the bamboo strip during the brushing process.

[0027] Preferably, after the instantaneous light carbonization in step (4), SEM observation confirms that a continuous micro-carbonization protective layer is formed on the surface of the bamboo strip, and the thickness of the protective layer is 3-5 μm.

[0028] Preferably, the specific method of rinsing with clean water in step (5) is as follows: after rinsing with running water, soak in clean water, change the water every 12 hours, and continue for 48 hours.

[0029] Preferably, in step (7), the mass ratio of polymer to specialty oil in the polymer-specialty oil mixture is 3:1.

[0030] Preferably, the gradient heating program in step (8) is as follows: from 50°C to 90°C at a rate of 20±2°C / h, then to 100°C at the same rate, and then hold at 90-100°C for 30±5 minutes.

[0031] Preferably, in step (8), the pressure of atmospheric pressure high temperature oily molecule permeation is maintained at 0.0-0.1 kPa, and the temperature is maintained at 100℃±3℃.

[0032] Preferably, the bamboo material mentioned in step (1) is 2-3 year old shady bamboo produced in Sichuan, and the bamboo fiber content is ≥45%, the lignin content is ≤28%, and the internode length is greater than 66cm.

[0033] Preferably, after baking in step (9), the gap between the bamboo strips and the porcelain body is ≤0.02mm, and after being placed for 30 days under conditions of humidity >85% and temperature 28℃, there are no obvious mold spots on the surface of the bamboo strips.

[0034] Compared with the prior art, the beneficial effects of the present invention are:

[0035] This method for preparing dark brown fine bamboo filaments for porcelain-bodied bamboo weaving significantly improves the mechanical properties and durability of the bamboo filaments. It employs an irreversible process sequence of "strong acid oxidation and shaping → instantaneous light carbonization → strong alkali degreasing → oil tanning and impregnation → atmospheric pressure high-temperature oily molecular penetration," solving the problems of insufficient toughness, easy breakage, easy shedding, easy mold growth, and easy fading of traditional bamboo filaments. Experimental verification shows that the bamboo filaments prepared by this invention can withstand ≥100 cycles of repeated bending with a radius of curvature R=50mm without breaking, far exceeding the <10 cycles of traditional bamboo filaments, greatly reducing losses during the weaving process and meeting the weaving requirements of complex patterns. Simultaneously, through gradient cooling and deep penetration of oily molecules, the structural stability of bamboo fibers is enhanced, resulting in uniform shrinkage after drying and a gap of ≤0.02mm between the bamboo fibers and the porcelain body, thus solving the problem of easy detachment of traditional bamboo fibers. The corrosion resistance, insect resistance, and mildew resistance are comprehensively optimized. A micro-carbonized protective layer (≤5μm) formed by composite acid oxidation and instantaneous light carbonization, synergistically with strong alkali degreasing to remove lignin, sugars, and other nutrient matrices, fundamentally blocking the survival environment of insect eggs. The organosilicon emulsifier introduced during the oil tanning process forms a protective film with the polymer, combined with… Subsequent waterproofing and dustproofing treatments ensure that the bamboo fibers show no corrosion in a salt spray test (500h) and no obvious mold spots after being placed for 30 days under conditions of humidity >85% and temperature 28℃, completely solving the problems of traditional bamboo fibers being prone to insect infestation, mold, and blackening. The color stability and aesthetic effect are now improved. Strong acid oxidation activates bamboo xanthophyll to generate a stable dark brown matrix, and instantaneous light carbonization controls the color uniformity, avoiding the problems of brittleness and uneven color caused by traditional deep carbonization (>200℃) or poor colorfastness and easy fading of bamboo fibers when using dyes.After six months of outdoor exposure testing, the bamboo fibers achieved ISO105-B02 standard level 4 in color stability, exhibiting a uniform deep brown color with a high-grade silky sheen. This meets the requirements of high-end handicrafts for consistent appearance and durability, solving the pain points of traditional dyeing methods that result in easy fading and insufficient color vibrancy. The process is also more environmentally friendly and safer, abandoning toxic preservatives such as boric acid and arsenic salts used in traditional processes. Instead, it employs a composite anti-mildew and insect repellent solution (Jianis Bamboo Protection No. 2, Buckman 40L) and environmentally friendly oil tanning agents (such as WR-2011, S-33), achieving low-toxicity processing throughout the bamboo fiber treatment process. This aligns with the development trend of modern environmentally friendly materials, reducing harm to operators and the environment, and meeting green process requirements. Furthermore, it addresses the challenge of mutually exclusive properties, expanding application scenarios. Through the synergistic effect of acid-alkali-oil tanning, it overcomes the bottleneck of performance incompatibility between "waterproofing and toughness" and "preservation and color": the oil tanning agent and the oil content... The embedding of the fibers into the micropores enhances the waterproof and dustproof properties of the bamboo fibers (contact angle ≥90°) while preserving the fiber's elasticity. Simultaneously, precise pH control at each stage of the process (e.g., pH ≥6 after acid treatment, pH 6.8-7.4 after neutralization, pH 7.6-8.0 during the initial impregnation with the composite silicone emulsion and special polymer, and pH 6.5-6.8 during the later fixation stage) avoids fiber embrittlement caused by chemical residues. This allows the bamboo fibers to adapt to both humid environments (such as the rainy season in the south) and dry climates (such as winter in the north). It eliminates the traditional dyeing process, using a strong acid + high-temperature instantaneous light carbonization treatment to produce brown bamboo fibers with stable color that does not fade and a high-grade silky sheen. This meets the requirements of high-end handicrafts for stable color and natural luster, significantly expanding the application scenarios of porcelain-bodied bamboo weaving handicrafts from indoor furnishings to outdoor decorations and other broader fields. Detailed Implementation

[0036] This section will describe in detail specific embodiments of the present invention, enabling people to intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it should not be construed as a limitation on the scope of protection of the present invention.

[0037] This invention provides a technical solution: Example 1: Preparation of No. 4 porcelain-bodied bamboo weaving brown fine bamboo fibers (0.45mm × 0.18mm)

[0038] Step 1: Raw material selection and pretreatment

[0039] Two-year-old shady bamboo (2-3 years old) from Qionglai, Sichuan Province was selected. The bamboo material should have a fiber content of ≥45%, a lignin content of ≤28%, a hemicellulose content of 23%±, and a node length of ≥66cm, uniform diameter, no insect holes or cracks, and a smooth surface.

[0040] Scraping: Use a special scraper to remove the outermost green skin of the bamboo, leaving a 0.2mm-0.3mm thick layer of surface tissue to avoid damaging the internal fibers;

[0041] Splitting bamboo: Splitting bamboo longitudinally along the grain into strips 25mm-30mm wide;

[0042] Bamboo drying: Lay the bamboo strips flat and expose them to the sun for 7 days (protect them from rain and moisture during this period) until the moisture content drops to 18% (detected by an infrared moisture meter).

[0043] Step 2: High-temperature boiling treatment

[0044] Prepare a compound anti-mildew and insect repellent solution: by weight percentage, add 0.5% Jianis Bamboo Protector No. 2, 0.3% Bakman 40L, and 99.2% tap water, stir well, and pour into a pressure vessel.

[0045] The pretreated bamboo strips are completely immersed in the composite solution (with heavy objects to prevent them from floating), and boiled for 180 minutes at a pressure of 50-70 kPa and a temperature of 98-100℃.

[0046] Slowly release the pressure (takes 25 minutes), then let it cool naturally to 35°C before removing the bamboo strips. Place them in a well-ventilated environment at 30-60°C for slow drying at a low temperature for 50 hours (to avoid surface hardening).

[0047] Step 3: Chemical-Physical Modification

[0048] Strong acid oxidation and shaping

[0049] Prepare a compound acid solution: 20% nitric acid, 3% oxalic acid, and 77% tap water (by mass). Stir well and maintain the temperature at 25℃±5℃.

[0050] Apply the compound acid solution evenly to the surface of the bamboo strips with a brush, ensuring a coverage rate of ≥99%, and leave it for 40-45 seconds.

[0051] Instantaneous light carbonization

[0052] Within 45 seconds after acid treatment, bamboo strips were placed 5 cm above an open flame of charcoal at a temperature of 1000°C or higher for 0.8-1 seconds to form a micro-carbonized protective layer of about 4 μm thick (confirmed by SEM observation).

[0053] Let stand for 4 hours

[0054] Step 4: Neutralization and degreasing with strong alkali

[0055] Prepare the compound alkaline solution: Mix 90% saturated lime water with 2% 20mol / L NaOH solution (volume ratio) and adjust the pH to 12.6-13.0.

[0056] Immerse the bamboo strips in the above alkaline solution and soak them at 25°C for 0.5 hours;

[0057] After removal, rinse with running water until there is no obvious alkaline residue, then soak in clean water, changing the water every 12 hours. After 48 hours, test the pH to 7.0-7.2.

[0058] Manually shave the bamboo strips to a thickness of 0.18mm (error ±0.01mm), remove burrs and surface attachments, and air dry at room temperature.

[0059] Step 5: Fine fiber separation

[0060] Slitting with a punch: Using a special mold, bamboo strips are cut into square bamboo strips with a width of 0.45mm-0.48mm;

[0061] Softening the bamboo strips: Twist the bamboo strips by hand for 5 minutes, ensuring that each strip is uniform and there is one strip at each end. There should not be multiple strips at one end, nor should one end be larger than the other. This will fully activate the elasticity of the fibers.

[0062] Uniform bamboo strip drawing: The bamboo strips are passed through a uniform cutter with a 0.45mm aperture to ensure that the dimensional error is ≤±0.01mm.

[0063] Step 6: Impregnation of composite silicone emulsion with special polymer

[0064] Adjust the pH of the water to 7.8 (using sodium bicarbonate), add 12% Honglin Chemical WR-2011 (polymer and specialty oil mixture) and 8% Honglin Chemical S-33 (organosilicon emulsifier), and stir at 58℃-60℃ until homogeneous to prepare an oil-tanning compound solution;

[0065] The bamboo strips are completely immersed in the composite solution and soaked for 48 hours at a constant temperature of 55-60℃.

[0066] After naturally cooling to 30℃, adjust the pH of the composite solution to 6.6-6.8 with dilute acetic acid, add 3% zirconium acetate ions (mass ratio), stir well and let stand for 30 minutes;

[0067] Remove the bamboo strips and let them stand at room temperature (25℃-35℃) for 24 hours.

[0068] Step 7: Atmospheric pressure and high temperature oily molecular penetration

[0069] Add 500 mL of mixed solution (50% CHEMOL-199S and 50% butyl acetate, by volume) to the heating pot, suspend the bamboo strips 10 cm above the solution, and cover the heating pot.

[0070] Heat to 100℃ and maintain this condition for 30 minutes;

[0071] Gradual cooling: 100℃→80℃ (cooling rate 20℃ / h), 80℃→50℃ (cooling rate 10℃ / h), naturally cool to 35℃ and soak for 70 hours, then remove the bamboo strips;

[0072] Air-dry: Place the bamboo strips in an environment of 30℃-50℃ and 55% humidity to air-dry for 72 hours.

[0073] Step 8: Quality Inspection and Post-Knitting Processing

[0074] Quality inspection: Select bamboo strips that are free of burrs and meet the size requirements for storage;

[0075] Weaving: Select qualified bamboo strips to weave porcelain handicrafts. During the weaving process, soak the bamboo strips in clean water (to expand through capillary action and enhance toughness);

[0076] Waterproof and dustproof treatment:

[0077] The bamboo fibers are evenly coated with Honglin Chemical's JS-593 solvent-based water-repellent agent and then allowed to air dry naturally to obtain the finished product.

[0078] Step 9: Baking

[0079] After weaving, place the product in a 120℃ oven and bake for 30 minutes to allow the bamboo fibers to dry and shrink, thus bonding them tightly to the porcelain body.

[0080] Example 2: Preparation of No. 3 porcelain-bodied bamboo weaving brown fine bamboo fibers (0.5mm × 0.22mm)

[0081] The difference from Example 1 is as follows:

[0082] In step 4, the bamboo strips are manually thinned to a first layer thickness of 0.22mm (error ±0.01mm).

[0083] In step 5, the punch slitting width is 0.5mm, and a 0.5mm diameter uniform cutter is used to ensure even wire drawing.

[0084] Example 3: Preparation of No. 5 porcelain-bodied bamboo weaving brown fine bamboo fibers (0.42mm × 0.16mm)

[0085] The difference from Example 1 is as follows:

[0086] In step 4, the bamboo strips are manually thinned to a first-layer thickness of 0.16mm (error ±0.01mm). In step 5, the punch slitting width is 0.42mm, and a 0.42mm aperture uniform cutter is used for even wire drawing. Performance test results.

[0087] The bamboo fibers prepared in the above embodiments all met the following indicators after testing:

[0088] Repeated bending test (radius of curvature R = 50 mm): ≥100 times without breakage;

[0089] Anti-mold test: After being placed at 85% humidity and 28℃ for 30 days, no mold spots appeared on the surface; Salt spray test (500h): No corrosion occurred;

[0090] Color stability: After 6 months of outdoor exposure, it reaches level 4 according to ISO105-B02 standard; gap between the porcelain body and the substrate: ≤0.02mm.

[0091] Comparison of the technical effects of the final products from the new and old processes (taking Sichuan Cizhu 0.40mm x 0.16mm ultra-fine bamboo fibers as an example)

[0092]

[0093]

[0094] The core of this invention lies in the irreversible process sequence of "strong acid oxidation and shaping → instantaneous light carbonization → strong alkali neutralization and degreasing → oil tanning and impregnation → high-temperature oily molecule penetration". The above embodiments are only preferred methods. All equivalent adjustments made to the following details based on the technical essence of this invention (such as bamboo fiber specifications, specific reagent brand replacements, etc.) shall still fall within the protection scope of this invention.

Claims

1. A process for the preparation of dark brown fine bamboo filaments for use in the manufacture of canework over a bamboo base, characterized in that, Includes the following steps: S1. Pre-treatment: Select bamboo materials and perform scraping, splitting, and drying in sequence; S2. High-temperature boiling: Immerse bamboo strips in a composite anti-mildew and insect-repellent solution, boil for 180 minutes at 95-100℃ and 50-70KPa pressure, slowly release the pressure and allow to cool naturally to below 40℃, then remove and slowly dry at 30-60℃; the composite anti-mildew and insect-repellent solution is composed of 0.5% Jianis Bamboo Protection No. 2, 0.3% Bachmann 40L and 99.2% water; S3. Strong acid oxidation and shaping: Apply a composite acid solution to the surface of the bamboo strips. The composite acid solution is 20% nitric acid + 3% oxalic acid + 77% water, with a coverage of ≥99%. After standing for 40-50 seconds, quickly proceed to the light carbonization process. S4. Instantaneous light carbonization: Within 40-50 seconds after S3 treatment, place the bamboo strip 5cm above a charcoal fire flame of 1000℃ or above for ≤1 second to form a micro-carbonization protective layer of ≤5μm. After standing for 4 hours, rinse with running water until pH≥6. S5. Strong alkali neutralization and degreasing: Immerse bamboo strips in a compound solution of 90% saturated lime water and 2% 20mol / L NaOH, add water to adjust the pH to 12.6-13.2, and soak for 0.5 hours at a temperature of 25-35℃. After soaking, rinse with water until the pH reaches 6.8-7.

4. Then take the first layer of bamboo skin and shave it thin to the target thickness. S6. Fine shavings: The bamboo strips are cut into bamboo strips 0.45-0.55mm wide, which are then softened by kneading and pulled into uniform strands. S7. Composite silicone emulsion and special polymer impregnation: Add sodium bicarbonate to adjust the pH of the water to 7.6-8.0, add 12% polymer and special oil mixture and 8% organosilicon emulsifier, immerse the bamboo fibers at 55-60℃ for ≥48 hours, cool naturally and slowly, add dilute acetic acid to adjust the pH to 6.5-6.8, add 3% zirconium acetate ion fixation for 30 minutes, take out and let stand for 24 hours; S8. Atmospheric pressure high temperature oily molecular penetration: Place the bamboo strips 10cm above the mixed solution of 50% CHEMOL-199S and 50% butyl acetate from Honglin Chemical. Heat the solution with an electric heating mantle to a temperature of 98-103℃ for 30 minutes. Then, gradually lower the temperature by 20℃ per hour. After three hours, cool the solution to 35±5℃ and then remove it to air dry. S9. Waterproof and dustproof treatment: Apply or soak the bamboo fibers with Honglin Chemical JS-593 solvent-based water-repellent agent. S10. Post-weaving treatment: After weaving, bake the ceramic-bodied bamboo woven product in an oven at 120℃-130℃ for 30 minutes; remove and let stand after cooling naturally at room temperature.

2. The method of claim 1, wherein After being exposed to the sun for 7 days in S1, the specific method of low-temperature slow drying in S2 is as follows: continuous ventilation and drying in an environment of 30-60℃, while avoiding direct sunlight during the drying process.

3. The method according to claim 2, characterized in that, The temperature of the composite acid solution in S3 is controlled at 20-30℃, and the acid solution is ensured to be in complete contact with the surface of the bamboo strips during the application process.

4. The method according to claim 3, characterized in that, After the instantaneous light carbonization in S4, SEM observation confirmed that a continuous micro-carbonized protective layer was formed on the surface of the bamboo strips, and the thickness of the protective layer was 3-5 μm.

5. The method according to claim 4, characterized in that, The specific method of rinsing with clean water in S5 is as follows: after rinsing with running water, soak in clean water, change the water every 12 hours, and continue for 48 hours.

6. The method according to claim 5, characterized in that, In the polymer and specialty oil mixture described in S7, the mass ratio of polymer to specialty oil is 3:

1.

7. The method according to claim 6, characterized in that, The gradient heating program in S8 is as follows: from 50℃ to 90℃ at a rate of 20±2℃ / h, then to 100℃ at the same rate, and hold at 90-100℃ for 30±5 minutes.

8. The method according to claim 7, characterized in that, In S8, the pressure for the atmospheric pressure high-temperature oily molecule permeation is maintained at 0KPa-10KPa, and the temperature is maintained at 100℃±3℃.

9. The method according to claim 1, characterized in that, The bamboo material mentioned in S1 is 2-3 year old shady bamboo from Sichuan, with a bamboo fiber content ≥45%, lignin content ≤28%, and internode length greater than 66cm.

10. The method according to claim 1, characterized in that, After baking as described in S10, the gap between the bamboo fibers and the porcelain body is ≤0.02mm, and after being placed for 30 days under conditions of humidity >85% and temperature 28℃, there are no obvious mold spots on the surface of the bamboo fibers.

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