A production process of bamboo-cotton blended fabric

Abstract

This invention relates to a production process for bamboo-cotton blended fabric, belonging to the field of fiber weaving technology. The process includes the following steps: bamboo fiber yarn is treated with cellulase and then impregnated in a carboxylated chitosan solution. After stirring, the yarn is removed, and excess solution is removed to obtain modified bamboo fiber yarn. Cotton fiber yarn is reinforced with a cotton fiber reinforcing agent to obtain modified cotton fiber yarn. The modified bamboo fiber yarn and cotton fiber yarn are spun together to prepare a base fabric. The base fabric is then treated with a processing solution to obtain a bamboo-cotton blended fabric. This invention provides an improved process for preparing bamboo-cotton blended fabric, which can improve the fabric's wash fastness, comprehensively enhance its antibacterial effect, and improve its mechanical properties, thereby meeting the market demand for high-quality textiles.

Description

Technical Field

[0001] The present application relates to the technical field of fiber weaving, and more specifically, to a production process of a bamboo-cotton blended fabric. Background Art

[0002] Bamboo fiber is a fiber with strong moisture absorption and air permeability. By blending bamboo fiber with cotton fiber, a new type of fabric that is cool, comfortable and has antibacterial function can be woven. The bamboo-cotton blended fabric combines the natural advantages of bamboo fiber and cotton fiber, but in actual production, it often faces problems such as low color fastness to washing, incomplete antibacterial effect and insufficient mechanical properties. These problems are mainly due to the limitations of fiber characteristics and preparation process.

[0003] First, the color fastness of bamboo-cotton blended fabrics often decreases during washing. This is mainly due to the fact that the dye is not firmly bonded to the fiber and there are many amorphous areas in the fiber structure, which makes the dye easy to migrate and change color in water. In addition, bamboo fiber easily absorbs moisture and expands in water, which further affects the penetration and fixation of the dye and increases the difficulty of dyeing.

[0004] Secondly, the incomplete antibacterial effect is also a major challenge. Although bamboo fiber itself has certain antibacterial properties, this property may be weakened due to improper processing during the blending process, and the coverage of bacterial species is relatively small. At present, the market's requirements for the antibacterial properties of textiles are increasing, and relying solely on the natural antibacterial properties of bamboo fiber is no longer able to meet the demand.

[0005] Finally, insufficient mechanical properties are also an important factor restricting the application of bamboo-cotton blended fabrics. The elasticity and strength of bamboo fibers are relatively weak, and they are easily damaged during the spinning process, resulting in poor mechanical properties such as wear resistance and wrinkle resistance of the final product. This not only affects the appearance and feel of the fabric, but also limits its application in high-end clothing and household products.

[0006] Therefore, in view of the above-mentioned shortcomings of bamboo-cotton blended fabrics, it is urgent to develop an improved preparation process to improve the washing color fastness of the fabric, comprehensively enhance the antibacterial effect and improve the mechanical properties, so as to meet the market demand for high-quality textiles. Summary of the invention

[0007] The purpose of the present invention is to provide a production process of bamboo-cotton blended fabrics to solve the problems raised in the background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A production process for a bamboo-cotton blended fabric comprises the following preparation steps:

[0010] The bamboo fiber yarn is treated with cellulase and then immersed in a carboxylated chitosan solution, and then taken out after stirring, and the excess solution is removed to obtain a modified bamboo fiber yarn; the cotton fiber yarn is reinforced with a cotton fiber yarn reinforcing agent to obtain a modified cotton fiber yarn; the modified bamboo fiber yarn and the cotton fiber yarn are woven to prepare a base fabric; the base fabric is treated with a processing liquid to obtain a bamboo-cotton blended fabric;

[0011] The cotton fiber yarn reinforcing agent consists of catechol, bacterial cellulose and deionized water.

[0012] Furthermore, the modified bamboo fiber yarn is prepared by the following steps:

[0013] A1. Add bamboo fiber yarn into cellulase solution, raise the system temperature to 40-60° C., treat for 30-60 minutes, then take out and dry to obtain pretreated bamboo fiber yarn;

[0014] A2. Add the dried pretreated fiber into 15-20 g / L carboxylated chitosan solution, treat at 60-80° C. for 10-20 minutes, then take out and treat with a padder until the padding rate is 85-95%, thereby obtaining modified bamboo fiber yarn.

[0015] Furthermore, in step A1, the cellulase is acid cellulase or neutral cellulase, and the usage amount is 1-3wt%.

[0016] Furthermore, in step A1, the cellulase is acid cellulase or neutral cellulase with a purity of 10000 U / g and a usage amount of 1-3 wt%.

[0017] Further, the modified cotton fiber yarn is prepared by the following steps:

[0018] Add catechol and bacterial cellulose into deionized water and stir to obtain a cotton fiber yarn enhancer; add cotton fiber yarn into the cotton fiber yarn enhancer, raise the system temperature to 30-50°C and stir, and treat for 10-30 minutes to obtain a modified cotton fiber yarn.

[0019] Further, the modified cotton fiber yarn is prepared by the following steps:

[0020] Catechol and bacterial cellulose are added to deionized water, and stirred at 30-60 rpm for 3-5 minutes at room temperature to obtain a cotton fiber yarn enhancer; cotton fiber yarn is added to the cotton fiber yarn enhancer at a bath ratio of 1 g:20 mL, the system temperature is increased to 30-50° C. and the system is stirred at 30-90 rpm, and after treating for 10-30 minutes, a modified cotton fiber yarn is obtained.

[0021] Furthermore, the mass volume ratio of catechol, bacterial cellulose and sterile ionized water is (0.1-0.3) g:(0.1-1.0) g:100 mL.

[0022] Furthermore, the production process of the bamboo-cotton blended fabric specifically includes the following preparation steps:

[0023] S1, using modified bamboo fiber yarn as warp yarn and modified cotton fiber yarn as weft yarn, and then respectively introducing the warp yarn and weft yarn into a loom for weaving treatment to obtain a base fabric;

[0024] S2. Spray the base fabric with the processing liquid at a rate of 5-10 mL / m 2 The base fabric is treated with a spraying amount of, and then pre-baked at 80-90°C for 3-5 minutes, and then baked at 160-190°C for 60-120 seconds to obtain a bamboo-cotton blended fabric.

[0025] Furthermore, the processing liquid is obtained by mixing the esterification reaction catalyst and the inorganic salt in a mass ratio of (1-5):(1-5), and then adding the mixture into deionized water in a mass volume ratio of 1g:20mL and stirring evenly.

[0026] Furthermore, the esterification reaction catalyst is at least one of sodium hypophosphite, dimethyl stannate, trimethylguanidine, 4-dimethylaminopyridine and isopropyl titanate.

[0027] Furthermore, the inorganic salt is at least one of a silver salt, a copper salt, a ferric salt, a ferrous salt and a gallium salt.

[0028] Furthermore, the inorganic salt is at least one of ferric chloride, ferric sulfate, ferrous sulfate, zinc sulfate, zinc chloride, copper sulfate, silver nitrate, and silver sulfate.

[0029] In summary, this application has the following beneficial effects:

[0030] In the technical solution of the present invention, by using cellulase for pretreatment, acidic cellulase and neutral cellulase have higher catalytic activity and specificity for bamboo fiber substrate in the system, can hydrolyze the surface layer of cellulose more deeply, improve the roughness of the surface of bamboo fiber yarn, increase the saturation between fibers, which is beneficial to improve the wet strength of the fabric and better maintain the appearance of the fabric.

[0031] In the technical solution of the present invention, carboxylated chitosan solution is then used to modify bamboo fiber yarn, and catechol and bacterial cellulose are used to enhance cotton fiber yarn to prepare modified bamboo fiber yarn and modified cotton fiber yarn. Carboxylated chitosan can improve the adhesion and impregnation effect of chitosan on bamboo fiber yarn, significantly improve the dyeing performance of bamboo fiber yarn material, and have a broad-spectrum bactericidal effect. Catechol and bacterial cellulose are applied to cotton fiber yarn, and catechol can further improve the antibacterial effect of the material. The fiber structure of bacterial cellulose is fine and uniform, which can significantly improve the mechanical properties of fabrics. Catechol molecules are physically embedded in the mesh structure of bacterial cellulose, and this embedding effect can increase the stability of catechol in bacterial cellulose and help to exert the antibacterial and antioxidant functions of catechol. In addition, the phenolic hydroxyl group of catechol has a strong electronegativity, which can form a hydrogen bond with the hydroxyl group on the bacterial cellulose, improve the uniform load and stability of bacterial cellulose on the surface of cotton fiber yarn, and improve the mechanical properties of fabrics.

[0032] In the technical solution of the present invention, modified bamboo fiber yarn and modified cotton fiber yarn are used for weaving, and are immersed in a processing solution containing an esterification reaction catalyst and an inorganic salt and then heat-treated. Under the action of the esterification reaction catalyst, the carboxylated chitosan on the bamboo fiber yarn and the hydroxyl groups on the cotton fiber yarn undergo an esterification reaction, which promotes the fixation of the contact points between the fibers on the fabric.

[0033] In the technical solution of the present invention, inorganic salt ions are used in the processing liquid, and the metal ions in the inorganic salt have empty orbitals that can coordinate with the carbonyl group. Due to the chelation effect of catechol on metal ions, the metal ions accumulated near the fiber can form coordination bonds with the carbonyl group in the reactant, thereby changing the electron cloud distribution and geometric configuration of the reactant molecule, reducing the activation energy of the reaction, and at the same time, through its charge effect and coordination effect, promoting the transfer of protons between the reactant molecules, and better promoting the esterification reaction. Since catechol contains more adjacent phenolic hydroxyl groups, it can chelate the metal ions on the inorganic salt in the processing liquid, reduce the concentration of the required inorganic salt and esterification catalyst in the processing liquid, reduce the reagent content and reduce the pollution to the environment. After heat treatment, the chelated metal ions can also improve the antibacterial effect of the fabric.

[0034] In the technical solution of the present invention, bacterial cellulose is also used to strengthen cotton fibers. The molecular structure of bacterial cellulose is more similar to that of cotton fibers, which helps to form a tighter and stronger bond in the cotton fibers, thereby improving the mechanical properties and durability of the fabric, better encapsulating catechol, and providing more reaction sites between fibers. DETAILED DESCRIPTION

[0035] The following will be combined with 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 part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The specific implementation methods of this application involve:

[0037] The model of neutral cellulase is GC869; the model of acid cellulase is DL-100;

[0038] The yarn count of bamboo fiber yarn is 32, and the twist is 70 twists / 10cm;

[0039] Bacterial cellulose was provided by Guilin Qihong Technology Co., Ltd., with a diameter of 50-100 nm, a length of 10,000-20,000 nm, and a cellulose type I crystal structure;

[0040] The degree of substitution of carboxylated chitosan is ≥ 60%.

[0041] A production process for a bamboo-cotton blended fabric comprises the following preparation steps:

[0042] S1, adding 9.7 tex bamboo fiber yarn into the cellulase solution, raising the system temperature to 40°C, taking it out after treating it for 30 minutes, and naturally drying it until the moisture content of the bamboo fiber is ≤6%, thereby obtaining the pretreated bamboo fiber yarn;

[0043] The cellulase used is acid cellulase with a purity of 10000 U / g and a usage amount of 1 wt%.

[0044] S12, adding the dried pretreated bamboo fiber yarn to a 15 g / L carboxylated chitosan solution at a bath ratio of 1 g:20 mL, treating at 60° C. for 10 minutes, then taking out and treating with a padder until the padding rate is 85%, thereby obtaining a modified bamboo fiber yarn;

[0045] S13, adding catechol and bacterial cellulose to deionized water, stirring at 30 rpm for 3 minutes at room temperature to obtain a cotton fiber yarn enhancer; adding 19.5 tex cotton fiber yarn to the cotton fiber yarn enhancer at a bath ratio of 1 g: 20 mL, raising the system temperature to 30° C. and stirring the system at 30 rpm for 10 minutes to obtain a modified cotton fiber yarn;

[0046] Among them, the mass volume ratio of catechol, bacterial cellulose and sterile ionized water is 0.1g:0.1g:100mL.

[0047] S14, using the modified bamboo fiber yarn obtained in step S2 as warp yarn (9.7 tex×2), and using the modified cotton fiber yarn obtained in step S3 as weft yarn (19.5 tex×4), and then introducing the warp yarn and the weft yarn into a loom for weaving treatment, respectively, with a warp density of 464.5 yarns / 10 cm, a weft density of 322.5 yarns / 10 cm, a total warp of 7432 yarns, a ground weave reed number of 2, a side weave reed number of 2, a reed number of 224 teeth / 10 cm, and a weaving structure of a plain weave sample to obtain a base fabric;

[0048] S2. Spray the base fabric with the processing liquid at 5mL / m 2 The base fabric obtained in step S4 is treated by spraying a spraying amount of, and then pre-baked at 80° C. for 3 minutes, and then baked at 160° C. for 60 seconds, to obtain a bamboo-cotton blended fabric;

[0049] The processing liquid is obtained by mixing an esterification reaction catalyst and an inorganic salt in a mass ratio of 1:5, and then adding the mixture into deionized water in a mass volume ratio of 1g:20mL and stirring evenly; the esterification reaction catalyst used is sodium hypophosphite, and the inorganic salt used is copper sulfate.

[0050] A production process for a bamboo-cotton blended fabric comprises the following preparation steps:

[0051] S1, adding 9.7 tex bamboo fiber yarn into the cellulase solution, raising the system temperature to 50°C, taking it out after treating for 45 minutes, and naturally drying it until the moisture content of the bamboo fiber is ≤6%, to obtain pretreated bamboo fiber yarn;

[0052] The cellulase used is acid cellulase with a purity of 10000 U / g and a usage amount of 2 wt%.

[0053] S12, adding the dried pretreated bamboo fiber yarn to a 17 g / L carboxylated chitosan solution at a bath ratio of 1 g:20 mL, treating at 70° C. for 15 minutes, then taking out and treating with a padder until the padding rate is 90%, thereby obtaining a modified bamboo fiber yarn;

[0054] S13, adding catechol and bacterial cellulose to deionized water, stirring at 45 rpm for 4 minutes at room temperature to obtain a cotton fiber yarn enhancer; adding 19.5 tex cotton fiber yarn to the cotton fiber yarn enhancer at a bath ratio of 1 g: 20 mL, raising the system temperature to 40° C. and stirring the system at 30-90 rpm, and treating for 10-30 minutes to obtain a modified cotton fiber yarn;

[0055] Among them, the mass volume ratio of catechol, bacterial cellulose and sterile ionized water is 0.2g:0.5g:100mL.

[0056] S14, using the modified bamboo fiber yarn obtained in step S2 as warp yarn (9.7 tex×2), and using the modified cotton fiber yarn obtained in step S3 as weft yarn (19.5 tex×4), and then introducing the warp yarn and the weft yarn into a loom for weaving treatment, respectively, with a warp density of 464.5 yarns / 10 cm, a weft density of 322.5 yarns / 10 cm, a total warp of 7432 yarns, a ground weave reed number of 2, a side weave reed number of 2, a reed number of 224 teeth / 10 cm, and a weaving structure of a plain weave sample to obtain a base fabric;

[0057] S5. Spray the base fabric with the processing liquid at 8mL / m 2 The base fabric obtained in step S4 is treated by spraying a spraying amount of, and then pre-baked at 85° C. for 4 minutes, and then baked at 180° C. for 90 seconds, to obtain a bamboo-cotton blended fabric;

[0058] The processing liquid is obtained by mixing an esterification reaction catalyst and an inorganic salt in a mass ratio of 3:2, and then adding the mixture into deionized water in a mass volume ratio of 1g:20mL and stirring evenly; the esterification reaction catalyst used is trimethylguanidine, and the inorganic salt used is copper sulfate.

[0059] A production process for a bamboo-cotton blended fabric comprises the following preparation steps:

[0060] S1, adding 9.7 tex bamboo fiber yarn into the cellulase solution, raising the system temperature to 60°C, taking it out after treating for 60 minutes, and naturally drying it until the moisture content of the bamboo fiber is ≤6%, to obtain pretreated bamboo fiber yarn;

[0061] The cellulase used is neutral cellulase with a purity of 10000 U / g and a usage amount of 3 wt%.

[0062] S12, adding the dried pretreated bamboo fiber yarn to a 20 g / L carboxylated chitosan solution at a bath ratio of 1 g:20 mL, treating at 80° C. for 20 minutes, then taking out and treating with a padder until the padding rate is 95%, thereby obtaining a modified bamboo fiber yarn;

[0063] S13, adding catechol and bacterial cellulose to deionized water, stirring at 60 rpm for 5 minutes at room temperature to obtain a cotton fiber yarn enhancer; adding 19.5 tex cotton fiber yarn to the cotton fiber yarn enhancer at a bath ratio of 1 g: 20 mL, raising the system temperature to 50° C. and stirring the system at 90 rpm for 30 minutes to obtain a modified cotton fiber yarn;

[0064] Among them, the mass volume ratio of catechol, bacterial cellulose and sterile ionized water is 0.3g:1.0g:100mL.

[0065] S14, using the modified bamboo fiber yarn obtained in step S2 as warp yarn (9.7 tex×2), and using the modified cotton fiber yarn obtained in step S3 as weft yarn (19.5 tex×4), and then introducing the warp yarn and the weft yarn into a loom for weaving treatment, respectively, with a warp density of 464.5 yarns / 10 cm, a weft density of 322.5 yarns / 10 cm, a total warp of 7432 yarns, a ground weave reed number of 2, a side weave reed number of 2, a reed number of 224 teeth / 10 cm, and a weaving structure of a plain weave sample to obtain a base fabric;

[0066] S2. Spray the base fabric with the processing liquid at a rate of 10 mL / m 2 The base fabric obtained in step S4 is treated by spraying a spraying amount of, and then pre-baked at 90° C. for 5 minutes, and then baked at 190° C. for 120 seconds, to obtain a bamboo-cotton blended fabric;

[0067] The processing liquid is obtained by mixing an esterification reaction catalyst and an inorganic salt in a mass ratio of 5:1, and then adding the mixture into deionized water in a mass volume ratio of 1g:20mL and stirring evenly; the esterification reaction catalyst used is sodium hypophosphite, and the inorganic salt used is ferric chloride.

[0068] Comparative Example 1

[0069] The difference between this comparative example and Example 1 is that the cellulase used in this comparative example is alkaline cellulase.

[0070] Comparative Example 2

[0071] The difference between this comparative example and Example 1 is that in step S3 of this comparative example, the cotton fiber yarn strengthening agent is obtained by adding bacterial cellulose into deionized water at a mass volume ratio of 0.2 g:100 mL and stirring at a rate of 30 rpm for 3 minutes at room temperature.

[0072] Comparative Example 3

[0073] The difference between this comparative example and Example 1 is that in step S3 of this comparative example, the cotton fiber yarn enhancer is prepared by adding catechol and nanocellulose into deionized water at a ratio of 0.1 g:0.1 g:100 mL, and stirring at 30 rpm for 3 minutes at room temperature to obtain the cotton fiber yarn enhancer; wherein the size of the nanocellulose is 20-50 nm, and the purity is 99.5%.

[0074] Comparative Example 4

[0075] The difference between this comparative example and Example 1 is that in step S5 of this comparative example, the processing liquid is obtained by adding an esterification reaction catalyst into deionized water at a mass volume ratio of 1 g:20 mL and stirring evenly; the esterification reaction catalyst used is sodium hypophosphite.

[0076] Performance Testing

[0077] The mechanical properties of the bamboo-cotton blended fabrics prepared in Examples 1-3 and Comparative Examples 1-4 were tested. The samples in different groups were cut into samples of 250 mm × 50 mm ± 0.5 mm in size. The tensile properties of the materials were tested according to the method described in GB / T 3923.1-2013 "Tensile Properties of Textile Fabrics". The test results are shown in Table 1.

[0078] Table 1 Mechanical properties test of bamboo-cotton blended fabrics prepared in Examples 1-3 and Comparative Examples 1-4

[0079]

[0080] It can be seen from the results in Table 1 that the bamboo-cotton blended fabric prepared in Example 2 has the best mechanical properties, and the fabrics prepared in the three embodiments are superior to the bamboo-cotton blended fabrics prepared in Comparative Examples 1-4 in terms of breaking strength, wet breaking strength and breaking elongation. That is, within the technical scheme defined in the present application, the mechanical properties of the prepared bamboo-cotton blended fabrics are excellent.

[0081] The antibacterial effect of the bamboo-cotton blended fabrics prepared in Examples 1-3 and Comparative Examples 1-4 is now tested. The killing effect of bamboo-cotton blended fabrics on Gram-positive bacteria, Gram-negative bacteria and fungi was measured. Bacillus, Escherichia coli and Candida albicans were taken as test strains. 5 mL of sterilized culture medium was poured into a 25 mL sterilized culture dish for solidification. In the solidified culture medium, a sterile steel drill was used to make holes in the agar medium with a pore size of 6 mm. The microbial suspension was evenly applied to the surface of the solidified medium with a sterile swab, and 0.1 g of bamboo-cotton blended fabric sample was added to each well with the help of a micropipette. The plate was incubated at 37 ° C for 24 hours to achieve antibacterial activity, and at 25 ° C for 48 hours to obtain antifungal activity. Five readings were obtained for each sample and averaged, and the test results are shown in Table 2 below.

[0082] Table 2 Antibacterial effect of bamboo-cotton blended fabrics prepared in Examples 1-3 and Comparative Examples 1-4

[0083]

[0084] It can be seen from the results in Table 2 that the bamboo-cotton blended fabric prepared in the present invention has the best antibacterial effect on Escherichia coli. It can be seen from the results in Comparative Examples 2 and 4 that the antibacterial effect of the fabric can be improved after the fabric is treated with catechol and inorganic salt ions.

[0085] The dyeing properties of the bamboo-cotton blended fabrics prepared in Examples 1-3 and Comparative Examples 1-4 are now tested. The bamboo-cotton blended fabrics prepared in different groups are dyed with 2wt% reactive red X-3B dye, the bath ratio of the fabric to the dye liquor is 1:70, the dyeing temperature is 40°C, the dyeing time is 50 minutes, and then washed with deionized water for 3 times, and then dried at 70°C. The dyeing lightness and hue value of the fabric are detected using a computer color measurement system, and the color fastness of the dyeing after washing 10 times and 20 times is tested. Five points are selected for measurement in each group of samples, and the average value is recorded. The test results are shown in Table 3 below.

[0086] Table 3 Test of dyeing properties of bamboo-cotton blended fabrics prepared in Examples 1-3 and Comparative Examples 1-4

[0087]

[0088] From the results in Table 3, it can be seen that the bamboo-cotton blended fabric prepared in Example 2 has the best dyeing performance. And the samples prepared in the three embodiments have better dyeing performance in all aspects than the samples in the comparative examples.

[0089] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0090] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A production process for bamboo-cotton blended fabrics, characterized in that: The following steps are involved: The bamboo fiber yarn is treated with cellulase and then immersed in a carboxylated chitosan solution, and then taken out after stirring and excess solution is removed to obtain a modified bamboo fiber yarn; Using a cotton fiber yarn reinforcing agent to strengthen the cotton fiber yarn to obtain a modified cotton fiber yarn; Modified bamboo fiber yarn and cotton fiber yarn are used for weaving to prepare a base fabric; the base fabric is treated with a processing liquid to obtain a bamboo-cotton blended fabric; Wherein, described modified cotton fiber yarn is prepared by following steps: The catechol and bacterial cellulose are added to deionized water and stirred to obtain a cotton fiber yarn reinforcing agent; the cotton fiber yarn is added to the cotton fiber yarn reinforcing agent, the system temperature is increased to 30-50° C. and stirred, and after treating for 10-30 minutes, a modified cotton fiber yarn is obtained; the cotton fiber yarn reinforcing agent is composed of catechol, bacterial cellulose and deionized water; The processing liquid is obtained by mixing an esterification reaction catalyst and an inorganic salt in a mass ratio of (1-5):(1-5), and then adding the mixture into deionized water in a mass volume ratio of 1g:20mL and stirring evenly.

2. The production process of a bamboo-cotton blended fabric according to claim 1, characterized in that: The modified bamboo fiber yarn is prepared by the following steps: A1. Add bamboo fiber yarn into cellulase solution, raise the system temperature to 40-60° C., treat for 30-60 minutes, then take out and dry to obtain pretreated bamboo fiber yarn; A2. Add the dried pretreated bamboo fiber yarn into 15-20 g / L carboxylated chitosan solution, treat at 60-80° C. for 10-20 minutes, then take out and treat with a padder until the padding rate is 85-95%, thereby obtaining modified bamboo fiber yarn.

3. The production process of a bamboo-cotton blended fabric according to claim 2, characterized in that: In step A1, the cellulase is acid cellulase or neutral cellulase, and the usage amount is 1-3 wt %.

4. The production process of a bamboo-cotton blended fabric according to claim 1, characterized in that: The mass volume ratio of catechol, bacterial cellulose and sterile ionized water is (0.1-0.3) g:(0.1-1.0) g:100 mL.

5. The production process of a bamboo-cotton blended fabric according to claim 1, characterized in that: Specifically include the following preparation steps: S1, using modified bamboo fiber yarn as warp yarn and modified cotton fiber yarn as weft yarn, and then respectively introducing the warp yarn and weft yarn into a loom for weaving treatment to obtain a base fabric; S2. Spray the base fabric with the processing liquid at a rate of 5-10 mL / m 2 The base fabric is treated with a spraying amount of, and then pre-baked at 80-90°C for 3-5 minutes, and then baked at 160-190°C for 60-120 seconds to obtain a bamboo-cotton blended fabric.

6. The production process of a bamboo-cotton blended fabric according to claim 1, characterized in that: The esterification reaction catalyst is at least one of sodium hypophosphite, dimethyl stannate, trimethylguanidine, 4-dimethylaminopyridine and isopropyl titanate.

7. The production process of a bamboo-cotton blended fabric according to claim 1, characterized in that: The inorganic salt is at least one of a silver salt, a copper salt, a ferric salt, a ferrous salt and a gallium salt.

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