Preparation method of dark brown fine bamboo filaments for porcelain body bamboo weaving

Abstract

The invention discloses a preparation method of dark brown fine bamboo filaments for porcelain body bamboo weaving, and relates to the technical field of environment-friendly composite materials. Through acid-alkali-neutralization-oil tanning-carbonization multi-procedure cooperative treatment, the appearance of the natural bamboo fiber is kept, meanwhile, multiple protection functions are achieved, mildew prevention is achieved, toughness is enhanced, bending resistance is remarkably improved, water absorption is greatly reduced, and the product quality is improved. The natural dark brown color can be obtained without using dye, and the fine bamboo filaments are endowed with a stable dark brown smooth aesthetic effect.

Description

Technical Field

[0001] The invention relates to the technical field of environmentally friendly composite materials, and in particular to a method for preparing dark brown fine bamboo filaments for porcelain-based bamboo weaving. Background Art

[0002] In everyday porcelain-based bamboo weaving, the brown bamboo filaments used by most artisans are flat, thin filaments measuring 0.45mm by 0.18mm, commonly known as "#4" in the industry. A smaller number use "#3" filaments, measuring 0.5mm by 0.22mm, or "#5" filaments, measuring 0.42mm by 0.16mm. In this article, we collectively refer to these as "fine bamboo filaments for porcelain-based bamboo weaving." Besides artificial dyeing, fine bamboo filaments for porcelain-based bamboo weaving are categorized into two natural colors: natural and brown. The dark brown filaments mentioned here refer to dark brown carbonized fine bamboo filaments.

[0003] The traditional fine bamboo silk used for porcelain bamboo weaving is susceptible to moisture, mildew, insect damage and corrosion; it is not resistant to bending and is easy to break during the weaving process; the dark brown fine bamboo silk produced by traditional methods is not dark enough and not bright in color, and it is easy to fade and discolor after being dyed dark brown; after weaving, it is easy to separate from the porcelain because it is not firmly attached to the porcelain; it has low tensile strength and other problems.

[0004] Existing bamboo silk processing technologies for porcelain-based bamboo weaving mostly use single chemical treatment or simple boiling and drying, which results in brittle bamboo silk and uneven color. This cannot meet the weaving and durability requirements of high-end bamboo weaving and porcelain-based bamboo weaving crafts. In addition, traditional bamboo silk processing technology has multiple defects:

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

[0006] 2. Dyeing and protection are separated, and fading and insect damage problems coexist;

[0007] 3. The thin bamboo threads colored with chemical dyes are easy to fade, the color is not dark enough and the rice dumplings are not bright; and they do not meet environmental protection requirements.

[0008] 4. The dark brown bamboo silk produced by traditional methods is deeply carbonized and its toughness is damaged (such as long-term treatment at >200℃).

[0009] 5. The weaving process is fragile and easy to break. When traditional bamboo silk is bent during weaving (curvature radius R = 50mm), the average bending resistance is <10 times.

[0010] 6. The weaving of bamboo silk and porcelain relies on manual tightening, which makes the fit not tight and easy to fall off.

[0011] 7. Bamboo silk is prone to mold and will turn black after long-term use. After being placed under humidity >85% and temperature 28℃ for 7 days, obvious mold spots will appear on the surface of traditional bamboo silk.

[0012] Industry pain points: Although the existing technology uses repeated alkali boiling and airing, it does not solve the above problems, resulting in performance compromise. The fine bamboo silk (0.40-0.55mm wide) for daily porcelain-based bamboo weaving has extremely high requirements for flexibility, bending resistance, strength, and dimensional stability (shrinkage rate); the close fit of the fine bamboo silk and the porcelain body is the core process difficulty and quality key of porcelain-based bamboo weaving; the uniformity of natural brown and glossiness (mercerized feel) are important aesthetic values ​​of high-end porcelain-based bamboo weaving handicrafts, which are far higher than the requirements of ordinary bamboo products. Summary of the Invention

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

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

[0015] (1) Pretreatment: Select bamboo materials and carry out scraping (keeping the bamboo surface layer 0.2mm-0.3mm thick), splitting bamboo (split into 20-30mm wide bamboo strips), and airing bamboo (exposure to the sun for 5-7 days until the moisture content reaches 16%-20%, and pay attention to rain and moisture protection);

[0016] (2) High-temperature boiling: immerse the bamboo strips in a composite mildew and insect repellent solution, boil at 95-100°C and 50-70 kPa for 180 minutes, slowly release the pressure (>20 minutes), and naturally cool to below 40°C. After removal, slowly dry at 30-60°C (>48 hours); the composite mildew and insect repellent solution is composed of 0.5% Jianisi Bamboo Anti-Fungal No. 2, 0.3% Buckman 40L, and 99.2% water;

[0017] (3) Strong acid oxidation setting: Apply 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 enter the high-temperature light carbonization process;

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

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

[0020] (6) Fine silk separation: Cut the bamboo strips into 0.45-0.55mm wide bamboo silk, soften it by kneading, and draw it into a smooth silk;

[0021] (7) Impregnation of composite silicone emulsion and special polymer: add sodium bicarbonate to adjust the pH of clean water to 7.6-8.0, add 12% polymer and special oil mixture (such as Honglin Chemical WR-2011) and 8% silicone emulsifier (such as Honglin Chemical S-33), immerse the bamboo silk in the composite liquid at 55-60℃ for ≥48 hours, and add dilute acetic acid to adjust the pH to 6.5-6.8 after natural slow cooling. Add 3% zirconium acetate ion to fix for 30 minutes, remove and let stand for 24 hours;

[0022] (8) Normal pressure and high temperature oil molecule penetration: The bamboo filaments were placed 10 cm above a mixed solution of 50% CHEMOL-199S and 50% butyl acetate prepared by Honglin Chemical. The solution was heated with an electric heating mantle from 50°C to 90°C at a rate of 20±2°C / h, then to 100°C at the same rate, and kept at 98-103°C for 30±5 minutes. The temperature was then gradually lowered (100°C → 80°C, rate of 20±2°C / h; 80°C → 50°C, rate of 10±1°C / h) to 35±5°C, and then soaked for 70 hours. The solution was then taken out and dried in the shade (30±5°C, humidity ≤60%, ≥72 hours).

[0023] (9) Waterproof and dustproof treatment: Use Honglin Chemical JS-593 solvent-based water-extraction agent to brush or soak the bamboo silk.

[0024] (10) Post-weaving treatment: After weaving is completed, the porcelain-based bamboo woven product is baked in an oven at 120℃-130℃ for 30 minutes; after cooling naturally at room temperature, it is taken out and allowed to stand.

[0025] Preferably, the specific method of the low-temperature slow drying in step (2) is: continuous ventilation and drying in an environment of 30-60°C, 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° C., and during the coating process, the acid solution is ensured to be in complete contact with the surface of the bamboo strips.

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

[0028] Preferably, the specific method of the clean water flushing in step (5) is: flushing with running water and then soaking in clean water, changing the water every 12 hours, and continuing for 48 hours.

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

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

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

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

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

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] This method for preparing dark brown, fine bamboo filaments for porcelain-based bamboo weaving significantly improves the filament's mechanical properties and durability. Utilizing an irreversible process sequence of "strong acid oxidation setting → instantaneous light carbonization → strong alkaline degreasing → oil tanning impregnation → atmospheric pressure and high-temperature oil-based molecular penetration," this method addresses the challenges of traditional bamboo filaments, such as insufficient toughness, brittleness, shedding, mildew, and fading. Experimental verification shows that the bamboo filaments produced in this invention can withstand repeated bending within a radius of curvature (R) of 50 mm without breaking, significantly exceeding the <10 times achieved by traditional filaments. This significantly reduces weaving losses and meets the demands of weaving complex patterns. At the same time, through gradient cooling and deep penetration of oily molecules, the structural stability of bamboo silk fibers is enhanced, the shrinkage is uniform after drying, and the gap between the bamboo silk and the porcelain body is ≤0.02mm, which solves the problem of traditional bamboo silk falling off easily; the corrosion resistance, insect resistance and mildew resistance are fully optimized, the micro-carbonized protective layer (≤5μm) formed by composite acid oxidation and instantaneous light carbonization, synergistically removes lignin, sugar and other nutrient matrices with strong alkali degreasing, and blocks the living environment of insect eggs from the root; the silicone emulsifier introduced in the oil tanning process forms a protective film with the polymer, combined with Subsequent waterproof and dustproof treatment ensures that the bamboo silk is corrosion-free in the salt spray test (500h), and has no obvious mildew spots after being placed under humidity>85% and temperature of 28℃ for 30 days, which completely solves the problems of traditional bamboo silk being easily infested by insects, mildew and blackening. The color stability and aesthetic effect are improved. Strong acid oxidation activates bamboo yellow pigment to form a stable dark brown matrix, and the color uniformity is regulated by instantaneous light carbonization, avoiding the brittleness and uneven color caused by traditional deep carbonization (>200℃) or the problems of poor coloring and easy fading of bamboo silk caused by dyes.After 6 months of outdoor exposure testing, the color stability of bamboo silk reached ISO105-B02 standard level 4, with a uniform dark brown color and a high-grade mercerized feel, meeting the requirements of high-end handicrafts for appearance consistency and durability, and solving the pain points of bamboo silk dyed with dyes in traditional crafts that are easy to fade and the color is not bright enough; the process is more environmentally friendly and safer, and toxic preservatives such as boric acid and arsenic salts in traditional crafts are abandoned. Composite anti-mildew and anti-insect liquid (Janis Bamboo Anti-No. 2, Buckman 40L) and environmentally friendly oil tanning agents (such as WR-2011, S-33) are used to achieve low-toxicity of bamboo silk processing throughout the process, which is in line with the development trend of modern environmentally friendly materials, reduces harm to operators and the environment, and meets the requirements of green technology; balancing the problem of mutually exclusive performance, expanding application scenarios, and breaking through the mutually exclusive performance bottlenecks of "waterproofness and toughness" and "anti-corrosion and color" through the synergistic effect of acid-alkali-oil tanning: oil tanning agent and oil separation The embedding of the seeds in the fiber micropores not only improves the waterproof and dustproof properties of the bamboo silk (contact angle ≥ 90°), but also retains the elasticity of the fiber; at the same time, the precise control of pH in each process (such as pH ≥ 6 after acid treatment, pH 6.8-7.4 after neutralization, pH to 7.6-8.0 in the early stage of impregnation with composite silicone emulsion and special polymer, and pH to 6.5-6.8 during the later fixation) avoids the fiber embrittlement caused by chemical residues, so that the bamboo silk can adapt to humid environments (such as the plum rain season in the south) and withstand dry climates (such as winter in the north). It abandons the traditional dyeing process with dyes and uses strong acid + high temperature instantaneous light carbonization treatment to make brown bamboo silk with stable color and non-fading, and a high-grade mercerized surface, which meets the requirements of high-end handicrafts for color stability, natural luster, etc., and significantly broadens the use scenarios of porcelain-based bamboo weaving handicrafts, extending from indoor furnishings to wider fields such as outdoor decoration. DETAILED DESCRIPTION

[0036] This section will describe the specific embodiments of the present invention in detail so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be understood as limiting the scope of protection of the present invention.

[0037] The present invention provides a technical solution: Example 1: Preparation of No. 4 porcelain-based bamboo-woven brown fine bamboo silk (specifications 0.45 mm × 0.18 mm)

[0038] Step 1: Raw material selection and pretreatment

[0039] Two-year-old shade-facing bamboo (2-3 years old) from Qionglai, Sichuan was selected. The bamboo fiber content was required to be ≥45%, lignin content ≤28%, hemicellulose content 23%±, and bamboo node length ≥66cm, uniform diameter, no wormholes or cracks, and smooth surface.

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

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

[0042] Bamboo drying: Place the bamboo strips flat in the sun for 7 days (protected 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

[0044] Prepare the composite anti-mildew and anti-insect liquid: by mass percentage, 0.5% Jianisi Bamboo Anti-Fungal No. 2, 0.3% Buckman 40L, and 99.2% tap water, stir well and pour into the autoclave.

[0045] Immerse the pretreated bamboo strips completely in the composite liquid (press with a heavy object to prevent floating), and boil at 50-70 kPa pressure and 98-100 ° C for 180 minutes;

[0046] Release the pressure slowly (takes 25 minutes), then wait for it to cool naturally to 35℃, take out the bamboo strips, and place them in a ventilated environment at 30-60℃ to slowly dry for 50 hours (to avoid surface hardening).

[0047] Step 3: Chemical-physical modification

[0048] Strong acid oxidation setting

[0049] Prepare composite acid solution: 20% nitric acid, 3% oxalic acid, 77% tap water (mass ratio), stir evenly and maintain the temperature at 25℃±5℃.

[0050] Use a brush to evenly apply the composite acid solution to the surface of the bamboo strips, with a coverage rate of ≥99%, and leave it for 40-45 seconds;

[0051] Instantaneous light carbonization

[0052] Within 45 seconds after acid treatment, the bamboo strips were placed 5 cm above the flame of a charcoal fire above 1000°C for 0.8-1 second, forming a micro-carbonized protective layer about 4 μm thick (confirmed by SEM observation);

[0053] Let stand for 4 hours

[0054] Step 4: Neutralize and degrease with strong alkali

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

[0056] Soak the bamboo strips in the above alkali solution at 25°C for 0.5 hours;

[0057] After taking it out, rinse it with running water until there is no obvious alkali residue, then soak it in clean water, change the water every 12 hours, and check the pH value at 7.0-7.2 after 48 hours;

[0058] Artificially thin the bamboo strips to a thickness of 0.18mm (error ±0.01mm) at the top layer of the bamboo skin, remove burrs and surface attachments, and dry in the shade at room temperature.

[0059] Step 5: Fine separation

[0060] Punch stripping: Use a special die to cut the bamboo strips into square bamboo strips with a width of 0.45mm-0.48mm;

[0061] Knead the bamboo silk to soften it: Knead the bamboo silk by hand for 5 minutes, making sure each strand is even, with one strand at each end. Do not have multiple strands at one end, or have one end larger than the other, to fully activate the fiber elasticity.

[0062] Smooth drawing: pass the bamboo wire through a 0.45mm aperture knife to ensure that the dimensional error is ≤±0.01mm.

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

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

[0065] Immerse the bamboo silk completely in the composite liquid and soak it at a constant temperature of 55-60℃ for 48 hours;

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

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

[0068] Step 7: Normal pressure and high temperature oil molecule penetration

[0069] Add 500 mL of a mixed solution (50% CHEMOL-199S and 50% butyl acetate, volume ratio) into the heating pot, hang the bamboo thread 10 cm above the solution, and cover the heating pot.

[0070] Raise the temperature to 100°C and maintain this condition for 30 minutes;

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

[0072] Dry in the shade: Place the bamboo silk in an environment of 30℃-50℃ and 55% humidity and dry it in the shade for 72 hours.

[0073] Step 8: Quality inspection and post-weaving processing

[0074] Quality inspection: select bamboo silk without burrs and of qualified size for storage;

[0075] Weaving: Select qualified bamboo silk to weave porcelain body handicrafts, and soak the bamboo silk with clean water during the weaving process (it expands through capillary action to enhance toughness);

[0076] Waterproof and dustproof treatment:

[0077] Use Honglin Chemical JS-593 solvent-based water-extracting agent to evenly brush the surface of the bamboo silk, and then dry it naturally to obtain the finished product.

[0078] Step 9: Bake

[0079] After weaving is completed, the product is placed in a 120℃ oven and baked for 30 minutes to allow the bamboo silk to dry and shrink, fitting tightly to the porcelain body.

[0080] Example 2: Preparation of No. 3 porcelain-based bamboo-woven brown fine bamboo silk (specifications 0.5 mm × 0.22 mm)

[0081] The difference from Example 1 is:

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

[0083] In step 5, the width of the punch strip is 0.5 mm, and the wire drawing is smooth with a 0.5 mm aperture knife;

[0084] Example 3: Preparation of No. 5 porcelain-based bamboo-woven brown fine bamboo silk (specifications 0.42 mm × 0.16 mm)

[0085] The difference from Example 1 is:

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

[0087] The bamboo silk prepared in the above examples has been tested and found to meet the following indicators:

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

[0089] Anti-mildew test: No mildew on the surface after being placed under the conditions of 85% humidity and 28°C for 30 days; Salt spray test (500h): No corrosion phenomenon;

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

[0091] Comparison of the technical effects of the final products of the new and old processes (taking Sichuan Cizhu 0.40mmx0.16mm ultra-fine bamboo filaments as an example)

[0092]

[0093]

[0094] The core of the present invention lies in the irreversible process sequence of "strong acid oxidation setting → instantaneous light carbonization → strong alkali neutralization and degreasing → oil tanning and impregnation → high-temperature oily molecule penetration". The above embodiment is only a preferred method. Any equivalent adjustments made to the following details based on the technical essence of the present invention (such as bamboo thread specifications, specific reagent brand replacement, etc.) are still within the scope of protection of the present invention.

Claims

1. A method for preparing dark brown fine bamboo filaments for porcelain bamboo weaving, characterized in that: The following steps are involved: S1. Pretreatment: Select bamboo materials and perform scraping, splitting and airing in sequence; S2. High-temperature boiling: Immerse the bamboo pieces in a composite mildew and insect repellent solution, boil it at 95-100°C and 50-70 kPa for 180 minutes, slowly release the pressure and naturally cool it to below 40°C, remove it and slowly dry it at 30-60°C; the composite mildew and insect repellent solution is composed of 0.5% Jianisi Bamboo Repellent No. 2, 0.3% Buckman 40L and 99.2% water; S3. Strong acid oxidation setting: Apply 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 40-50 seconds, quickly enter the light carbonization process; S4, instantaneous light carbonization: within 40-50 seconds after S3 treatment, place the bamboo strips 5 cm above the flame of a charcoal fire at a temperature of more than 1000°C for ≤1 second to form a micro-carbonized protective layer ≤5μm. After standing for 4 hours, rinse with running water until the pH is ≥6; S5. Alkali neutralization and degreasing: Immerse the bamboo strips in a mixture of 90% saturated lime water and 2% 20 mol / L NaOH, add clean water to adjust the pH to 12.6-13.2, and soak at 25-35°C for 0.5 hours. After taking out, rinse with clean water to pH 6.8-7.4, then take the top layer of bamboo skin and thin it to the target thickness; S6. Fine silk separation: Cut the bamboo strips into 0.45-0.55mm wide bamboo silk, soften it by kneading, and draw it into a smooth silk; S7. Impregnation with composite silicone emulsion and special polymer: Add sodium bicarbonate to adjust the pH of clean water to 7.6-8.0, add 12% polymer and special oil mixture and 8% silicone emulsifier, and soak the bamboo silk in the composite liquid at 55-60℃ for ≥48 hours. After natural slow cooling, add dilute acetic acid to adjust the pH to 6.5-6.8, add 3% zirconium acetate ion to fix for 30 minutes, remove and let it stand for 24 hours; S8. Normal-pressure, high-temperature oil molecule penetration: Place bamboo filaments 10 cm above a mixed solution of 50% CHEMOL-199S and 50% butyl acetate from Honglin Chemical. Heat the solution with an electric heating mantle to 98-103°C for 30 minutes. Then slowly lower the temperature by 20°C per hour. After three hours, cool to 35±5°C and dry in the shade. S9. Waterproof and dustproof treatment: Use Honglin Chemical JS-593 solvent-based water-extraction agent to brush or soak the bamboo silk. S10, post-weaving processing: After weaving is completed, the porcelain-based bamboo woven product is baked in an oven at 120℃-130℃ for 30 minutes; after cooling naturally at room temperature, it is taken out and allowed to stand.

2. The method according to claim 1, characterized in that After being exposed to the sun for 7 days in S1, the specific method of the low-temperature slow drying in S2 is: continuous ventilation and drying in an environment of 30-60°C, and 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° C., and the acid solution is ensured to be in complete contact with the surface of the bamboo slices during the coating 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 slice, 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 the clean water flushing in S5 is: after flushing 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 mixture of polymer and specialty oil 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 temperature increase program in S8 is: from 50°C to 90°C at a rate of 20±2°C / h, then to 100°C at the same rate, and then kept at 90-100°C for 30±5 minutes.

8. The method according to claim 7, characterized in that The pressure of the normal pressure and high temperature oily molecule penetration in S8 is maintained at normal pressure 0KPa-10KPa, and the temperature is maintained at 100°C±3°C.

9. The method according to claim 1, characterized in that The bamboo material described in S1 is 2-3 year old shade-facing bamboo produced in Sichuan, and the bamboo fiber content is ≥45%, the lignin content is ≤28%, and the internode length is greater than 66 cm.

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

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