Mildew-proof and moth-proof bamboo chip and treatment process thereof

Abstract

The invention relates to a mildew-proof and moth-proof bamboo chip and a treatment process thereof, and belongs to the technical field of bamboo chip preparation, and specifically, the treatment process comprises the following steps: washing and soaking a bamboo chip, treating the bamboo chip in an environment of 120-140 DEG C and 75-85 RH%, spraying a NaOH solution, then carrying out first heat treatment, dipping the treated bamboo chip with a compound enzyme solution, adjusting the pH value of the system to 4.5-5.0, and carrying out second heat treatment on the bamboo chip; adding a chelating agent, reducing the temperature of the system to 45-50 DEG C, adding an inorganic mildew removing agent, and treating for 1-2 hours; heating the bamboo chips to 160-180 DEG C, and treating the bamboo chips for 2-2.5 hours; and drying and shaping treatment: drying the bamboo chips at 40-50 DEG C, and carrying out hot pressing and shaping to obtain the mildew-proof and mothproof bamboo chips. According to the process, through optimization design and combination of physical, chemical and biochemical treatment means, the living environment of insects and fungi is fundamentally destroyed, the nutrition source of the insects and fungi is blocked, and the long-acting and environment-friendly mildew-proof and mothproof effects are achieved.

Description

Technical Field

[0001] This application relates to the technical field of bamboo chip preparation, and more specifically, it relates to a kind of mildew-proof and moth-proof bamboo chip and its processing technology. Background Art

[0002] Bamboo is widely used in fields such as construction and furniture due to its fast growth, renewable nature and excellent mechanical properties. However, its structural characteristics rich in cellulose, hemicellulose and lignin are vulnerable to the erosion of mildew and moths, resulting in the deterioration of material properties.

[0003] Traditional methods mostly rely on single chemical fungicide impregnation treatment, attempting to directly kill microorganisms and insect eggs through the toxicity of the agent. However, this method can only act on the surface of bamboo, and it is difficult to penetrate into the internal structure. Moreover, nutrients such as starch and reducing sugar in bamboo are not effectively removed or sealed, providing the possibility for the regeneration of insects and fungi. In addition, the long-term use of chemical fungicides may also lead to environmental pollution and pesticide residue problems, which do not meet the requirements of green and sustainable development.

[0004] In terms of physical treatment, although technologies such as heat treatment can improve the hydrophobicity of bamboo and reduce the probability of mildew attachment, conventional heat treatment processes often lack synergy with biochemical treatment and are difficult to precisely control the treatment effect. Single heat treatment may only partially damage the surface structure of bamboo, with limited exposed enzyme action sites, resulting in low efficiency of subsequent enzymatic hydrolysis or chemical agent treatment.

[0005] Therefore, aiming at the problems of easy mildew of bamboo and the single and limited existing treatment methods, it is urgent to develop a new type of mildew-proof and moth-proof bamboo chip treatment technology. Summary of the Invention

[0006] In order to solve the problems raised in the background art, this application provides a kind of mildew-proof and moth-proof bamboo chip and its processing technology.

[0007] A processing technology for a mildew-proof and moth-proof bamboo chip includes the following preparation steps: S1. Bamboo chip pretreatment: Remove the surface impurities of newly cut bamboo chips, wash them with clear water, and then soak them in a 50 - 60wt% ethanol solution for 1 - 1.5 hours to obtain pretreated bamboo chips; S2. Primary heat treatment: Treat the pretreated bamboo chips in an environment of 120 - 140°C and 75 - 85RH% for 2 - 3 hours, and spray a 5 - 10wt% NaOH solution; In the above process, the cellulose - lignin structure on the surface of the bamboo chip is initially damaged through heat treatment, and an alkali solution is sprayed to promote partial degradation of cellulose, combine with the alkali solution to dissolve lignin, and generate phenolic hydroxyl intermediates, facilitating the subsequent enzymatic hydrolysis to generate soluble humic acids such as fulvic acid.

[0008] S3. Biochemical anti-moth treatment: The bamboo slices after the first heat treatment are impregnated with a composite enzyme solution at 55 - 60 °C for 1.5 - 2 hours. Subsequently, the pH value of the system is adjusted to 4.5 - 5.0, a chelating agent is added, the system temperature is reduced to 45 - 50 °C, and it is stirred at a rate of 90 - 120 rpm for 10 - 20 minutes. Then, an inorganic anti-mildew agent is added and the treatment continues for 1 - 2 hours; S4. Second heat treatment: The bamboo slices obtained in step S3 are heated to 160 - 180 °C and treated in an inert atmosphere for 1 - 2 hours to obtain heat-treated bamboo slices; S5. Drying and shaping treatment: The heat-treated bamboo slices are dried at 40 - 50 °C until the water content is 6 - 12%, and then moisture regain treatment and hot pressing shaping are carried out to obtain a kind of mildew-proof and moth-proof bamboo slice.

[0009] Further, in step S2, during the first heat treatment, the heating rate is set at 1 - 5 °C / min.

[0010] Further, in step S3, the composite enzyme is obtained by mixing cellulase, hemicellulase and laccase according to an enzyme activity ratio of (1 - 3):1:(0.6 - 1.0).

[0011] In the above technical solution, cellulase can decompose the cellulose on the surface of the bamboo slice, increase the porosity of the bamboo slice, and promote the exposure of lignin. Hemicellulase further degrades the cellulase hydrolysis products and releases phenolic hydroxyl intermediates. Laccase catalyzes the oxidation of lignin to enhance the nutritional removal effect of the enzymatic hydrolysis treatment.

[0012] Further, the dosage ratio of the composite enzyme solution to the bamboo slice is 5 - 8 mL:1 g.

[0013] Further, the total enzyme activity of the composite enzyme solution is 80 - 120 FPU / g.

[0014] Further, in step S3, the chelating agent is obtained by mixing disodium EDTA and ascorbic acid according to a molar ratio of 1:(1 - 1.5).

[0015] Further, the mass ratio of the chelating agent to the bamboo slice is (0.1 - 0.2):1.

[0016] Further, in step S3, the inorganic anti-mildew agent is obtained by mixing borate and copper-based compounds.

[0017] Preferably, the inorganic anti-mildew agent is obtained by mixing borax and copper sulfate according to a mass ratio of (5 - 8):1.

[0018] In the above technical solution, inorganic mildew-proof agents such as borates achieve the purpose of mildew removal by destroying the cell walls of hyphae, and have a low inhibition rate on the activity of cellulase. When acting in the same system as the composite enzyme, they can synergistically improve the mildew and moth prevention effects on bamboo slices.

[0019] Furthermore, the usage amount of the sterile mildew-proof agent is 2-4 wt% of the total mass of the composite enzyme solution.

[0020] Furthermore, in step S4, the heating rate is 1-10 °C / min.

[0021] Furthermore, in step S5, the moisture regain treatment is specifically that the dried bamboo slices are balanced in an environment with a humidity of 75-85 RH% for 18-24 hours.

[0022] Furthermore, in step S5, the temperature of the hot pressing and shaping is 80-120 °C, the pressure is 5-15 Mpa, and the time is 10-20 minutes.

[0023] A bamboo slice prepared by the above solution.

[0024] In summary, the present application has the following beneficial effects: 1. In the technical solution of the present invention, cellulase, hemicellulase and laccase are selected and used in combination to treat bamboo slices. The composite enzyme synergistically degrades cellulose and hemicellulose on the surface of bamboo slices, releases lignin fragments, provides binding sites for subsequent chelating agents and inorganic mildew-proof agents, and enhances the antibacterial effect.

[0025] 2. The technical solution of the present invention is provided with steps of primary heat treatment, biochemical moth prevention treatment and secondary heat treatment. Through the primary heat treatment, moderate carbonization increases the hydrophobicity of the bamboo slice surface, reduces the probability of mold attachment, and destroys the cellulose-lignin structure on the bamboo slice surface, exposing more enzyme action sites such as phenolic hydroxyl intermediates, so that the composite enzyme can more efficiently degrade the substances on the bamboo surface. In the secondary heat treatment, high temperature causes the phenolic hydroxyl group-containing substances generated by enzymatic hydrolysis to dehydrate with borate radicals on the bamboo slice to form a boron-phenol complex, which is beneficial to inhibiting the germination of mold spores and enhancing the antimicrobial activity, achieving a long-term moth prevention effect. The biochemical treatment in S3 and the heat treatment in S4 are synergistic, which can reduce the usage amount of inorganic mildew-proof agents, avoid residual toxicity, or excessive usage, resulting in the brittleness of bamboo slices.

[0026] 3. In the technical solution of the present invention, ascorbic acid components are added to the chelating agent, and borates such as borax are used as sterile mildew-proof agents. Borax decomposes to form boric acid in an acidic environment. Although boric acid still has a certain antibacterial property, its efficacy is reduced compared with borax, resulting in a decrease in the bactericidal and mildew-removing effect under a unit dosage. At this time, the combination of borax and ascorbic acid generates reactive oxygen free radicals under acidic conditions. Ascorbic acid provides electrons, and borax acts as an electron acceptor to synergistically damage microbial DNA and enhance the bactericidal effect. At the same time, borates can chelate Fe3+ , stabilize the enzymatic hydrolysis process and slow down the oxidative polymerization of quinone groups in the system. During this process, ascorbic acid can play the role of a reducing agent, enhancing the degradation efficiency of the system towards quinone groups, increasing the content of water-soluble humic acid, and forming complexes in the system to further stabilize the chelated metal ions, preventing dissociation at high temperatures and prolonging the antibacterial effect. Detailed implementation manners

[0027] The following will combine the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0028] The raw materials involved in the specific implementation manners of this application are all chemically pure. In addition, the cellulase used is the cellulase derived from Trichoderma reesei, ATCC26921, with an enzyme activity of 10000 FPU / g. Hemicellulase: β-1,4 - hemicellulase derived from Aspergillus niger, CAS number: 9025-56-3, with an enzyme activity of 5000 U / g. Laccase: laccase derived from Coriolus versicolor, CAS number: 80498-15-3, with an enzyme activity of 100 U / mg. Amylase: α-amylase derived from Bacillus subtilis, with an enzyme activity of 20000 U / g, Novozymes. The thickness of the newly cut bamboo slices used is 4 mm.

[0029] Example 1 A treatment process for anti-mildew and anti-moth bamboo slices, including the following preparation steps: S1. Bamboo slice pretreatment: Remove the surface impurities of the newly cut bamboo slices, wash them with clear water, and then soak them in a 50wt% ethanol solution for 1 hour to obtain pretreated bamboo slices; S2. First heat treatment: Treat the pretreated bamboo slices in an environment of 120°C and 75RH% for 2 hours, and spray an 8wt% NaOH solution; during the process, the heating rate is set at 3°C / min.

[0030] S3. Biochemical anti-moth treatment: Immerse the bamboo slices after the first heat treatment in a composite enzyme solution at 55°C for 1.5 hours, then adjust the pH value of the system to 4.5, add a chelating agent, lower the system temperature to 45°C, stir at a rate of 120 rpm for 20 minutes, add an inorganic anti-mildew agent, and continue to treat for 1 hour; Among them, the composite enzyme is obtained by mixing cellulase, hemicellulase and laccase according to an enzyme activity ratio of 1:1:0.6; the dosage ratio of the composite enzyme solution to the bamboo slices is 5 mL:1 g, and the total enzyme activity of the composite enzyme solution is 80 FPU / g.

[0031] The chelating agent is obtained by mixing disodium EDTA and ascorbic acid in a molar ratio of 1:1, and the mass ratio of the chelating agent to the bamboo slices is 0.1:1.

[0032] The inorganic mildew remover is obtained by mixing borax and copper sulfate in a mass ratio of 5:1, and the usage amount of the sterile mildew remover is 2 wt% of the total mass of the complex enzyme solution.

[0033] S4. Secondary heat treatment: Heat the bamboo slices obtained in step S3 to 160 °C and treat them in an inert atmosphere for 1 hour to obtain heat-treated bamboo slices; during the process, the heating rate is 5 °C / min.

[0034] S5. Drying and shaping treatment: Dry the heat-treated bamboo slices at 40 °C until the water content is 8%, then perform a moisture regain treatment, hot press and shape them in a flat hot press, and then air-cool to room temperature with a wind speed of 1 m / s to obtain a mildew-proof and moth-proof bamboo slice; Among them, the moisture regain treatment is specifically to balance the dried bamboo slices in an environment with a humidity of 75RH% for 24 hours; the temperature of the hot press shaping is 90 °C, the pressure is 8 Mpa, and the hot press time is 10 minutes.

[0035] Example 2 A treatment process for mildew-proof and moth-proof bamboo slices includes the following preparation steps: S1. Bamboo slice pretreatment: Remove the surface impurities of the newly cut bamboo slices, wash them with clean water, and then soak them in a 55 wt% ethanol solution for 1.5 hours to obtain pretreated bamboo slices; S2. Primary heat treatment: Treat the pretreated bamboo slices at 130 °C and 80RH% for 2.5 hours, and spray 10 wt% NaOH solution; during the process, the heating rate is set to 5 °C / min.

[0036] S3. Biochemical moth-proof treatment: Immerse the bamboo slices after the primary heat treatment in a complex enzyme solution at 60 °C for 2 hours, then adjust the pH value of the system to 5.0, add a chelating agent, lower the system temperature to 50 °C, stir at a rate of 120 rpm for 20 minutes, add an inorganic mildew remover, and continue to treat for 1.5 hours; Among them, the complex enzyme is obtained by mixing cellulase, hemicellulase and laccase in an enzyme activity ratio of 2:1:0.8; the dosage ratio of the complex enzyme solution to the bamboo slices is 8 mL:1 g, and the total enzyme activity of the complex enzyme solution is 100 FPU / g.

[0037] The chelating agent is obtained by mixing disodium EDTA and ascorbic acid in a molar ratio of 1:1.2, and the mass ratio of the chelating agent to the bamboo slices is 0.15:1.

[0038] The inorganic mildew remover is obtained by mixing borax and copper sulfate in a mass ratio of 6.5:1, and the dosage of the sterile mildew remover is 3 wt% of the total mass of the composite enzyme solution.

[0039] S4. Secondary heat treatment: Heat up the bamboo slices obtained in step S3 to 170 °C and treat them in an inert atmosphere for 1.5 hours to obtain heat-treated bamboo slices; during the process, the heating rate is 10 °C / min.

[0040] S5. Drying and shaping treatment: Dry the heat-treated bamboo slices at 45 °C until the water content is 12%, then perform a moisture regain treatment, hot press and shape them in a flat hot press, and then air-cool them to room temperature with a wind speed of 1 m / s to obtain a mildew-proof and moth-proof bamboo slice; Among them, the moisture regain treatment is specifically to balance the dried bamboo slices in an environment with a humidity of 80RH% for 24 hours; the temperature of the hot press shaping is 100 °C, the pressure is 10 Mpa, and the hot press time is 12 minutes.

[0041] Example 3 A processing technology for a mildew-proof and moth-proof bamboo slice includes the following preparation steps: S1. Bamboo slice pretreatment: Remove the surface impurities of the newly cut bamboo slices, wash them with clean water, and then soak them in a 60 wt% ethanol solution for 1.5 hours to obtain pretreated bamboo slices; S2. Primary heat treatment: Treat the pretreated bamboo slices at 140 °C and 85RH% for 3 hours, and spray a 10 wt% NaOH solution; during the process, the heating rate is set at 5 °C / min.

[0042] S3. Biochemical moth-proof treatment: Immerse the bamboo slices after the primary heat treatment in a composite enzyme solution at 60 °C for 2 hours, then adjust the pH value of the system to 5.0, add a chelating agent, lower the system temperature to 50 °C, stir at a rate of 120 rpm for 20 minutes, add an inorganic mildew remover, and continue to treat for 2 hours; Among them, the composite enzyme is obtained by mixing cellulase, hemicellulase and laccase in an enzyme activity ratio of 3:1:1; the dosage ratio of the composite enzyme solution to the bamboo slices is 8 mL:1 g, and the total enzyme activity of the composite enzyme solution is 120 FPU / g.

[0043] The chelating agent is obtained by mixing disodium EDTA and ascorbic acid in a molar ratio of 1:1.5, and the mass ratio of the chelating agent to the bamboo slices is 0.2:1.

[0044] The inorganic mildew remover is obtained by mixing borax and copper sulfate in a mass ratio of 8:1, and the dosage of the sterile mildew remover is 4 wt% of the total mass of the composite enzyme solution.

[0045] S4. Secondary heat treatment: Heat the bamboo slices obtained in step S3 to 180 °C and treat them in an inert atmosphere for 2 hours to obtain heat-treated bamboo slices; during the process, the heating rate is 10 °C / min.

[0046] S5. Drying and shaping treatment: Dry the heat-treated bamboo slices at 50 °C until the water content is 12%, then carry out moisture regain treatment, hot pressing and shaping in a flat hot press, and then air-cool to room temperature with a wind speed of 1 m / s to obtain a kind of mildew-proof and moth-proof bamboo slice; Among them, the moisture regain treatment is specifically to balance the dried bamboo slices in an environment with a humidity of 85RH% for 24 hours; the temperature of the hot pressing and shaping is 100 °C, the pressure is 10 Mpa, and the hot pressing time is 12 minutes.

[0047] Comparative Example 1 The difference between this comparative example and Example 2 is that the inorganic mildew-proof agent used in this comparative example is copper sulfate.

[0048] Comparative Example 2 The difference between this comparative example and Example 2 is that the inorganic mildew-proof agent used in this comparative example is obtained by mixing borax and sodium silicate in a mass ratio of 6.5:1.

[0049] Comparative Example 3 The difference between this comparative example and Example 2 is that the composite enzyme in this comparative example is obtained by mixing cellulase, amylase and laccase in an enzyme activity ratio of 2:1:0.8.

[0050] Comparative Example 4 The difference between this comparative example and Example 2 is that in this comparative example, biochemical moth-proof treatment is carried out after the primary heat treatment and secondary heat treatment steps. Specifically, a treatment process for a mildew-proof and moth-proof bamboo slice includes the following preparation steps: S1. Bamboo slice pretreatment: Remove the surface impurities of the newly cut bamboo slices, wash them with clear water and then soak them in a 55wt% ethanol solution for 1.5 hours to obtain pretreated bamboo slices; S2. Primary heat treatment: Treat the pretreated bamboo slices at 130 °C and 80RH% for 2.5 hours, and spray 10wt% NaOH solution; during the process, the heating rate is set at 5 °C / min.

[0051] S3. Secondary heat treatment: Heat the bamboo slices obtained in step S3 to 170 °C and treat them in an inert atmosphere for 1.5 hours to obtain heat-treated bamboo slices; during the process, the heating rate is 10 °C / min.

[0052] S4. Biochemical anti-moth treatment: The bamboo slices after the first heat treatment are impregnated with a composite enzyme solution at 60°C for 2 hours. Subsequently, the pH value of the system is adjusted to 5.0, a chelating agent is added, the system temperature is reduced to 50°C, stirred at a rate of 120 rpm for 20 minutes, and an inorganic anti-mildew agent is added, followed by continued treatment for 1.5 hours. S5. Drying and shaping treatment: The bamboo slices obtained in step S4 are dried at 45°C until the water content is 12%. Subsequently, a moisture regain treatment is carried out, hot pressing and shaping are performed in a flat hot press, and then air-cooled to room temperature with a wind speed of 1 m / s, thus obtaining a kind of mildew-proof and moth-proof bamboo slice.

[0053] Performance test The bamboo slices prepared in Examples 1-3 and Comparative Examples 1-4 of this application are made into samples with a specification of 5 cm * 50 cm, and the samples obtained in different groups are subjected to mildew-proof and moth-proof tests. The specific test methods are as follows: Mildew-proof test: The samples prepared in different groups are placed in an environment of 25°C and 90RH%, and inoculated with different molds for testing. The types of molds inoculated are Aspergillus niger and Penicillium citrinum. The concentration of the mold suspension is set to 1×10 5 CFU / mL. After 28 days, the percentage of the mildew area is measured and its mildew-proof grade is evaluated. The evaluation criteria for the mildew-proof grade are as follows: Grade Ⅰ: There are no visible mildew spots on the surface of the bamboo slice, only individual tiny dot-like mildews; Grade Ⅱ: There are a small number of scattered mildew spots on the surface of the bamboo slice, the diameter of the mildew spots < 1 mm, and the color is light; Grade Ⅲ: Obvious mildew spots appear on the surface of the bamboo slice, with a diameter of 1-3 mm, the color deepens, and there is spread in local areas; Grade Ⅳ: The surface of the bamboo slice is mildewed on a large area, the color is dark brown, and the surface fibers are softened or peeled off.

[0054] The specific mildew-proof test results are shown in Table 1 below.

[0055] Table 1 As can be seen from the results in Table 1, the mildew-proof grade of the samples in the examples is better than that of the samples obtained in the comparative examples, and among them, the sample in Example 2 has the best mildew-proof effect. As can be seen from the results in Comparative Example 1, using copper sulfate as an inorganic mildew-proof agent, its co-use with the composite enzyme will inhibit the activity of the composite enzyme, resulting in a reduction in the generation of phenolic acids and a decline in the mildew-inhibiting effect. As can be seen from the results in Comparative Example 2, using sodium silicate to replace copper sulfate in the inorganic mildew-proof agent, although the inhibitory effect of sodium silicate on the enzyme is low, it cannot assist in the degradation of quinone groups, and the effect is still lower than that of the examples. As can be seen from the results in Comparative Example 3, using amylase to replace hemicellulase, the cellulose degradation is incomplete and the lignin exposure is insufficient. As can be seen from the results in Comparative Example 4, the dehydration of the phenolic hydroxyl group-containing substance and the borate radical on the bamboo slice is insufficient, resulting in a decline in the mildew-proof effect.

[0056] Now, the anti-termite effect tests are carried out on the samples in different groups. The samples are placed in the activity area of termites (Coptotermes formosanus) with a termite density of 1×10 4 / m 2 . After seven days, the maximum erosion depth of the samples is measured with a precision of 0.1 mm, and its anti-termite grade is evaluated. The evaluation criteria for the anti-termite grade are as follows: Grade Ⅰ: There are no visible termite holes on the surface of the bamboo slice, the actual erosion depth < 1 mm, and only the local color becomes slightly darker; Grade Ⅱ: Small termite holes appear on the surface of the bamboo slice, the diameter of the termite holes < 1 mm, the erosion depth is 1 - 2 mm, and the erosion path is shallowly distributed with uniform depth; Grade Ⅲ: The termite holes on the surface of the bamboo slice are dense, the diameter of the termite holes is 1 - 3 mm, the erosion depth is irregular, and the fibers in some areas are broken or peeled off.

[0057] The specific anti-termite test results are shown in Table 2 below: Table 2 As can be seen from the results shown in Table 2 above: The anti-termite performance of the bamboo slice products prepared in Examples 1 - 3 of this application is significantly better than that of the products prepared in Comparative Examples 1 - 4, that is, within the limited technical solutions of this application, the comprehensive performance of the prepared bamboo slices is excellent.

[0058] In the description of the specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0059] The above content is only an example and illustration of the present invention. Those skilled in the art to which this technology pertains can make various modifications or supplements to the described specific embodiments, or use similar methods for substitution, as long as they do not deviate from the invention or exceed the scope defined by this claims, and all should fall within the protection scope of the present invention.

Claims

1. A processing technology for mildew-proof and moth-proof bamboo slices, characterized in that, It includes the following preparation steps: S1. Bamboo chip pretreatment: Wash the newly cut bamboo chips and soak them in an ethanol solution to obtain pretreated bamboo chips; S2. Primary heat treatment: Treat the pretreated bamboo chips in an environment of 120 - 140 °C and 75 - 85 RH% for 2 - 3 hours, and then spray NaOH solution; S3. Biochemical anti - moth treatment: Immerse the bamboo chips after the primary heat treatment in a composite enzyme solution at 55 - 60 °C, then adjust the pH value of the system to 4.5 - 5.0, add a chelating agent, lower the system temperature to 45 - 50 °C, stir and add an inorganic mildew remover, and continue to treat for 1 - 2 hours; S4. Secondary heat treatment: Heat up the bamboo chips obtained in step S3 to 160 - 180 °C and treat them in an inert atmosphere for 1 - 2 hours to obtain heat - treated bamboo chips; S5. Drying and shaping treatment: Dry the heat - treated bamboo chips at 40 - 50 °C until the water content is 6 - 12%, and then perform hot - pressing shaping to obtain a kind of mildew - proof and moth - proof bamboo chip.

2. The processing technology of a mildew-proof and moth-proof bamboo slice according to claim 1, characterized in that, In step S2, during the primary heat treatment process, the heating rate is set to 1 - 5 °C / min.

3. The processing technology of a mildew-proof and moth-proof bamboo slice according to claim 1, characterized in that, In step S3, the composite enzyme is obtained by mixing cellulase, hemicellulase and laccase according to an enzyme activity ratio of 1 - 3:1:0.6 - 1.

0.

4. The processing technology of a kind of bamboo slices with mildew and moth prevention characteristics according to claim 1, is characterized in that, The dosage ratio of the composite enzyme solution used in step S3 to the bamboo chips is 5 - 8 mL:1 g.

5. The processing technology of a mildew-proof and moth-proof bamboo slice according to claim 1, characterized in that, For the composite enzyme solution used in step S3, the total enzyme activity is 80 - 120 FPU / g.

6. The processing technology of a kind of mildew-proof and moth-proof bamboo slice according to claim 1, characterized in that, In step S3, the chelating agent is obtained by mixing disodium EDTA and ascorbic acid according to a molar ratio of 1:1 - 1.

5.

7. The processing technology of a mildew-proof and moth-proof bamboo slice according to claim 1, characterized in that, In step S3, the mass ratio of the chelating agent to the bamboo chips is 0.1 - 0.2:

1.

8. The processing technology of a mildew-proof and moth-proof bamboo slice according to claim 1, characterized in that, In step S3, the inorganic mildew remover is obtained by mixing borate and copper - based compounds.

9. The processing technology of a mildew-proof and moth-proof bamboo slice according to claim 1, characterized in that In step S4, the heating rate is 1 - 10 °C / min.

10. A bamboo chip obtained by treating with the treatment process of a mildew - proof and moth - proof bamboo chip as described in any one of claims 1 - 9.

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