Bio-enzyme composite low-temperature dyeing process for wool fabric

Abstract

The invention relates to the technical field of dyeing, and particularly discloses a bio-enzyme composite low-temperature dyeing process for wool fabrics, a plurality of effective components are used for embedding a composite bio-enzyme, then the composite bio-enzyme is added into a dye, the wool fabrics are dyed under a low-temperature condition, the embedded composite bio-enzyme can prevent the composite bio-enzyme from being inactivated in the dyeing process, and the dyeing quality is improved. Meanwhile, the fixation rate of the dye on the wool fabric can be improved through the slow release effect of the microcapsules. Through the synergistic effect of various effective components, the stability of the biological enzyme is improved, the dye uptake of the dye to the wool fabric is improved, the fixation rate of the dye to the wool fabric is improved, the dyeing temperature is reduced, and the dye is suitable for large-scale popularization and application.

Description

Technical Field

[0001] The invention relates to the technical field of dyeing, in particular to a biological enzyme composite low-temperature dyeing process for wool fabric. Background Art

[0002] As a representative of protein fiber, wool is widely used in the textile and garment industry. However, the outer layer of the wool fiber surface has a scaly layer, which is hydrophobic. During the dyeing process of wool fiber, the dye solution is not easy to penetrate, which is not conducive to the entry and diffusion of dye molecules into the fiber, resulting in a low fiber dyeing rate. In addition, the dye concentration in the dyeing waste liquid is too high, which not only makes the dye unable to be fully utilized, but also causes certain difficulties in sewage treatment. At present, my country generally uses high-temperature dyeing for wool fabric dyeing. The problem is that the dyeing time is long, the energy consumption is too large, and the long-term high temperature has certain damage to the wool.

[0003] Since the surface of wool fiber presents lipid structure, non-polar groups are exposed, and it has strong hydrophobicity, the outer layer of scales is mainly composed of keratinized protein, with high cystine content, and the structure is hard and difficult to be expanded. Due to the existence of these two layers, the dye is hindered from diffusing and dyeing into the fiber, so the conventional dyeing of wool fabric must be carried out at a higher temperature. Because only when the temperature reaches above 80℃, the scales of wool fiber begin to open, and the dye can quickly penetrate and dye.

[0004] In recent years, the bio-enzyme low-temperature dyeing technology has developed rapidly. Low-temperature dyeing can effectively reduce damage to wool, reduce yarn breakage rate, and improve the feel of fabric. The use of bio-enzymes can destroy the scale layer on the surface of wool fibers, further destroy the hydrophobic layer, peel off the scale layer, expand the pores for dye molecules to enter, and improve the permeability of dyes, thereby making wool fabrics have a good dyeing rate when dyed at low temperatures.

[0005] Due to the complex structure and chemical properties of wool fibers, selecting the right bioenzyme and ensuring that it remains highly active during the dyeing process is a challenging task. Different types of bioenzymes have different effects on wool fibers and are easily affected by external factors such as temperature, pH value, and ionic strength, which can reduce or inactivate the enzyme activity, thus affecting the dyeing effect. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a biological enzyme composite low-temperature dyeing process for wool fabric.

[0007] A biological enzyme composite low-temperature dyeing process for wool fabric comprises the following steps: S1. Add 1-3 parts of the complex enzyme preparation by weight to 10-20 parts of water and stir evenly, add 1-3 parts of cyclodextrin thereto, stir, dry, and crush to obtain a first material; S2, adding 5-7 parts of chitosan to 50-60 parts of hydrochloric acid and stirring evenly, adjusting the system temperature to 50-60°C, using a NaOH solution with a concentration of 0.8-1.2 mol / L to adjust the system pH to 5-6, adding 1-3 parts of carboxymethyl cellulose and stirring for 1-2h at a stirring speed of 100-500r / min, and coating the surface of the first material by spray drying to obtain bio-enzyme microcapsules; S3. Put bio-enzyme microcapsules, 1-2 parts of silicon dioxide, 1-2 parts of calcium chloride, and 10-20 parts of dyes in the same bath to dye wool fabrics. During the dyeing process, first dye at room temperature and a pH value of 6-6.5, then heat to 40-42°C at a rate of 0.5-1.5°C / min and keep warm for 40-50 minutes, then lower the pH value to 5-5.5, heat to 45-50°C at a rate of 0.5-1.5°C / min, keep warm for 20-25 minutes, and dry after dyeing.

[0008] Among them, silica can evenly disperse the acid dye in the dye bath. Silica also has antibacterial effects, which can resist the growth and reproduction of bacteria, prevent the complex biological enzymes from being destroyed and decomposed, and reduce the pollution of fabrics.

[0009] Preferably, in S1, the biological enzymes in the complex enzyme preparation include LanL enzyme, lipase and laccase.

[0010] Preferably, in S1, the Lanase activity in the composite enzyme preparation is 1-3×10 3 u / g, lipase activity is 1-3×10 3 u / g, laccase activity is 1-3×10 3 u / g.

[0011] LanL enzyme mainly acts on the outer layer of wool fiber scales, causing the pores on the wool fiber to expand and the dye to be quickly dyed.

[0012] Lipase mainly acts on the surface of wool fiber scales. The surface of the scales has a lipid structure with non-polar groups exposed and is extremely hydrophobic. Lipase can remove some lipid substances on the surface of wool fiber scales, enhance the water absorption of wool fibers, and promote the adsorption of dyes by wool fibers.

[0013] In the present invention, the carboxyl group in the LanL enzyme acts on the disulfide bond of the cystine in the outer layer of the scales of the wool fiber, causing the outer layer of the scales to crack, and cooperates with chitosan and silicon dioxide to dye the wool fabric, and has good leveling and slow dyeing effects; during the dyeing process, the inner cavity of cyclodextrin is hydrophobic and the outer periphery is hydrophilic, and its internal cavity structure can enhance the stability of the colorant, and is easy to degrade and environmentally friendly. Laccase, under the promotion of chitosan, polymerizes with the aromatic compounds in the dye and dehydrates and condenses with the amino acids in the wool fiber, thereby increasing the fixation rate of the dye in the wool fiber.

[0014] Preferably, in S1, cyclodextrin is added and then stirred and dried; during the stirring process, the stirring temperature is 50-60°C, the stirring time is 1-2h, and the stirring speed is 100-500r / min. During the drying process, freezing is used for drying. More preferably, the stirring temperature is 50°C, the stirring time is 1h, and the stirring speed is 500r / min.

[0015] Preferably, in S2, the concentration of hydrochloric acid is 0.8-1.2 mol / L. More preferably, the concentration of hydrochloric acid is 1 mol / L.

[0016] Preferably, during the spray drying process in S2, the first material is sprayed for 15-20 minutes by intermittent spraying, the spraying temperature is 30-35°C, and the drying temperature is ≤50°C.

[0017] Preferably, in S3, during the post-dyeing treatment process, 40-42°C warm water is used for overflow for 15-20 min, the temperature is increased to 70-75°C at a rate of 5-6°C / min, kept warm for 5-10 min, 40-42°C warm water is used for overflow for 5-10 min, the temperature is increased to 70-75°C at a rate of 5-6°C / min, kept warm for 10-15 min, and 40-42°C warm water is used for overflow for 10-15 min.

[0018] The post-dyeing treatment of the present invention increases the temperature to inactivate the biological enzyme and wash away the excess dye. The wool fiber is not alkali-resistant and does not use soaping post-treatment.

[0019] Preferably, in S3, the dye is an acid dye, and the acid dye includes at least one of acid orange red, Coomassie brilliant blue, bromocresol green, bromocresol purple, azo dyes, bromophenol blue, acid fuchsin, methyl blue, and methylene blue.

[0020] Preferably, in S3, the dye is a natural dye, and the natural dye is at least one of black wolfberry anthocyanin, purple cabbage blue pigment, gardenia yellow pigment, and madder dye.

[0021] Natural dyes are environmentally friendly, antibacterial, and easily degradable. They work synergistically with biological enzymes for dyeing. The natural dyes extracted by biological enzymes and the antibacterial properties of natural dyes are not easily destroyed by biological enzymes and are more stable.

[0022] Beneficial effects: In the present invention, lipase, LanL enzyme and laccase are compounded and processed into microcapsules. Since cyclodextrin has a cavity structure, it has good stability for loading biological enzymes therein. The hydroxyl groups in the cyclodextrin react with the carboxyl groups of the carboxymethyl cellulose to make the microcapsule structure more tightly connected, thereby further enhancing the stability of the biological enzymes.

[0023] The results of the experiment showed that the laccase of the present invention works synergistically with lipase and LanL enzyme, which greatly reduces the dyeing temperature while ensuring high activity during the dyeing process. At the same time, the dye uptake rate is high and the dyeing fastness is good. In addition, the chitosan can be used to greatly shorten the dyeing time while reducing the dyeing temperature.

[0024] After the calcium chloride of the present invention is dissolved in the acid dye, metal calcium ions will be dissociated, which can promote the activity of biological enzymes. At the same time, the calcium ions can form coordination bonds with dye molecules and can be combined with amino acids and chitosan of wool fibers to enhance the affinity of the dye and the fibers. The calcium chloride can increase the ionic strength of the aqueous solution, promote the dispersion of dye molecules, and improve the dyeing rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a comparison chart of dyeing rate of dyed wool fabrics of Example 5, Comparative Examples 1-3 and the control group.

[0026] Figure 2 The figure is a comparison chart of the soap washing fastness of dyed wool fabrics of Example 5, Comparative Examples 1-3 and the control group.

[0027] Figure 3 The figure is a comparison chart of the color fastness of dyed wool fabrics of Example 5, Comparative Examples 1-3 and the control group.

[0028] Figure 4 It is a comparison chart of the average color difference values ​​of dyed wool fabrics of Example 5, Comparative Examples 1-3 and the control group.

[0029] Figure 5 It is a comparison chart of the improvement rate of dyeing uniformity of dyed wool fabrics of Example 5 and Comparative Examples 1-3 relative to the control group. DETAILED DESCRIPTION

[0030] The present invention will be further explained below in conjunction with specific embodiments.

[0031] The LanL enzyme used below was purchased from a certain company.

[0032] A biological enzyme composite low-temperature dyeing process for wool fabric comprises the following steps: S1, add 1g of the complex enzyme preparation to 10g of water and stir evenly, add 1g of cyclodextrin thereto, stir at a temperature of 50°C for 1h, the stirring speed is 500r / min, freeze-dry, and crush to obtain the first material; The biological enzymes in the complex enzyme preparation include an activity of 1×10 3 u / g of LanL enzyme, activity of 1×10 3 u / g lipase and activity is 1×10 3 u / g of laccase; S2, adding 5g of chitosan to 50g of 1mol / L HCl and stirring evenly, adjusting the system temperature to 50°C, using 1mol / L NaOH solution to adjust the system pH to 5, adding 1g of carboxymethyl cellulose and stirring for 1h, the stirring speed is 500r / min; spraying the first material by intermittent spraying for 15min, the spraying temperature is 30°C, drying, the drying temperature is 50°C, to obtain bio-enzyme microcapsules; S3. Put bio-enzyme microcapsules, 1g of silicon dioxide, 1g of calcium chloride, and 10g of acid orange-red dye in the same bath to dye wool fabric. During the dyeing process, dyeing is first performed at room temperature and pH 6, then heated to 40°C and kept warm for 40 minutes, then the pH value is lowered to 5 again, heated to 45°C at a rate of 1°C / min, and kept warm for 20 minutes. After dyeing, overflow with 40°C warm water for 15 minutes, heat to 75°C at a rate of 5°C / min, keep warm for 5 minutes, overflow with 40°C warm water for 5 minutes; use 40°C warm water again, heat to 70°C at a rate of 5°C / min, keep warm for 15 minutes, overflow for 10 minutes, and dry.

[0033] A biological enzyme composite low-temperature dyeing process for wool fabric comprises the following steps: S1, add 3g of the complex enzyme preparation to 20g of water and stir evenly, add 3g of cyclodextrin thereto, stir at a temperature of 50°C for 1h, the stirring speed is 500r / min, freeze-dry, and crush to obtain the first material; The biological enzymes in the complex enzyme preparation include 3×10 3 u / g of LanL enzyme, activity of 3×10 3 u / g lipase and activity is 3×10 3 u / g of laccase; S2, add 7g of chitosan to 50g of 1mol / L HCl and stir evenly, adjust the system temperature to 50°C, use 1mol / L NaOH solution to adjust the system pH to 5, add 3g of carboxymethyl cellulose and stir for 1h at a stirring speed of 500r / min; spray the first material with an intermittent spraying method for 15min at a spraying temperature of 30°C, and dry at a drying temperature of 50°C to obtain bio-enzyme microcapsules; S3, put bio-enzyme microcapsules, 2g silica, 2g calcium chloride, 20g acid orange-red dye in the same bath to dye wool fabric. During the dyeing process, first dye at room temperature and pH 6, then heat to 40℃ and keep warm for 40min, then lower the pH value to 5 again, heat to 45℃ at a rate of 1℃ / min, and keep warm for 20min. After dyeing, overflow with 40℃ warm water for 15min, heat to 75℃ at a rate of 5℃ / min, keep warm for 5min, overflow with 40℃ warm water for 5min; again use 40℃ warm water, heat to 70℃ at a rate of 5℃ / min, keep warm for 15min, overflow for 10min, and dry.

[0034] A biological enzyme composite low-temperature dyeing process for wool fabric comprises the following steps: S1, adding 1.1g of the complex enzyme preparation to 11g of water and stirring evenly, adding 1.1g of cyclodextrin thereto, stirring at a temperature of 50°C for 1h, stirring at a speed of 500r / min, freeze-drying, and crushing to obtain a first material; The biological enzymes in the complex enzyme preparation include an activity of 1.1×10 3 u / g of LanL enzyme and an activity of 1.1×10 3 u / g lipase and activity was 1.1×10 3 u / g of laccase; S2, adding 5.1g of chitosan to 50g of 1mol / L HCl and stirring evenly, adjusting the system temperature to 50°C, using 1mol / L NaOH solution to adjust the system pH to 5, adding 1.1g of carboxymethyl cellulose and stirring for 1h, the stirring speed is 500r / min; spraying the first material for 15min by intermittent spraying, the spraying temperature is 30°C, drying, the drying temperature is 50°C, to obtain bio-enzyme microcapsules; S3, put bio-enzyme microcapsules, 1.1g silicon dioxide, 1.1g calcium chloride, 11g acid orange-red dye in the same bath to dye wool fabric. During the dyeing process, first dye at room temperature and pH 6, then heat to 40℃ and keep warm for 40min, then lower the pH value to 5 again, heat to 45℃ at a rate of 1℃ / min, and keep warm for 20min. After dyeing, overflow with 40℃ warm water for 15min, heat to 75℃ at a rate of 5℃ / min, keep warm for 5min, overflow with 40℃ warm water for 5min; use 40℃ warm water again, heat to 70℃ at a rate of 5℃ / min, keep warm for 15min, overflow for 10min, and dry.

[0035] A biological enzyme composite low-temperature dyeing process for wool fabric comprises the following steps: S1, adding 2.9g of the complex enzyme preparation to 19g of water and stirring evenly, adding 2.9g of cyclodextrin thereto, stirring at a temperature of 50°C for 1h, stirring at a speed of 500r / min, freeze-drying, and crushing to obtain a first material; The biological enzymes in the complex enzyme preparation include an activity of 2.9×10 3 u / g of LanL enzyme and an activity of 2.9×10 3 u / g lipase and activity was 2.9×10 3 u / g of laccase; S2, add 6.9g of chitosan to 50g of 1mol / L HCl and stir evenly, adjust the system temperature to 50°C, use 1mol / L NaOH solution to adjust the system pH to 5, add 2.9g of carboxymethyl cellulose and stir for 1h, the stirring speed is 500r / min; spray the first material by intermittent spraying for 15min, the spray temperature is 30°C, dry, the drying temperature is 50°C, and obtain bio-enzyme microcapsules; S3, put bio-enzyme microcapsules, 1.5g silica, 1.5g calcium chloride, 15g acid orange-red dye in the same bath to dye wool fabric. During the dyeing process, first dye at room temperature and pH 6, then heat to 40℃ and keep warm for 40min, then lower the pH value to 5 again, heat to 45℃ at a rate of 1℃ / min, and keep warm for 20min. After dyeing, overflow with 40℃ warm water for 15min, heat to 75℃ at a rate of 5℃ / min, keep warm for 5min, overflow with 40℃ warm water for 5min; use 40℃ warm water again, heat to 70℃ at a rate of 5℃ / min, keep warm for 15min, overflow for 10min, and dry.

[0036] A biological enzyme composite low-temperature dyeing process for wool fabric comprises the following steps: S1, add 2g of the complex enzyme preparation to 15g of water and stir evenly, add 2g of cyclodextrin thereto, stir at a temperature of 50°C for 1h, a stirring speed of 500r / min, freeze-dry, and crush to obtain a first material; The biological enzymes in the complex enzyme preparation include an activity of 2×10 3 u / g of LanL enzyme, activity of 2×10 3 u / g lipase and activity is 2×10 3 u / g of laccase; S2, add 6g of chitosan to 50g of 1mol / L HCl and stir evenly, adjust the system temperature to 50°C, use 1mol / L NaOH solution to adjust the system pH to 5, add 2g of carboxymethyl cellulose and stir for 1h at a stirring speed of 500r / min; spray the first material with an intermittent spraying method for 15min at a spraying temperature of 30°C, and dry at a drying temperature of 50°C to obtain bio-enzyme microcapsules; S3, put bio-enzyme microcapsules, 1.5g silica, 1.5g calcium chloride, 15g acid orange-red dye in the same bath to dye wool fabric. During the dyeing process, first dye at room temperature and pH 6, then heat to 40℃ and keep warm for 40min, then lower the pH value to 5 again, heat to 45℃ at a rate of 1℃ / min, and keep warm for 20min. After dyeing, overflow with 40℃ warm water for 15min, heat to 75℃ at a rate of 5℃ / min, keep warm for 5min, overflow with 40℃ warm water for 5min; use 40℃ warm water again, heat to 70℃ at a rate of 5℃ / min, keep warm for 15min, overflow for 10min, and dry.

[0037] Comparative Example 1 A dyeing process for wool fabric comprises the following steps: S1, add 2g of the complex enzyme preparation to 15g of water and stir evenly, add 2g of cyclodextrin thereto, stir at a temperature of 50°C for 1h, a stirring speed of 500r / min, freeze-dry, and crush to obtain a first material; The biological enzymes in the complex enzyme preparation include an activity of 2×10 3 u / g of LanL enzyme, activity of 2×10 3 u / g lipase and activity is 2×10 3 u / g of laccase; S2. Put the first material, 1.5g silicon dioxide, 1.5g calcium chloride, and 15g acid orange-red dye in the same bath to dye the wool fabric. During the dyeing process, dyeing is first performed at room temperature and pH 6, then heated to 40°C and kept warm for 40 minutes, then the pH value is lowered to 5 again, heated to 45°C at a rate of 1°C / min, and kept warm for 20 minutes. After dyeing, overflow with 40°C warm water for 15 minutes, heat to 75°C at a rate of 5°C / min, keep warm for 5 minutes, overflow with 40°C warm water for 5 minutes; again use 40°C warm water, heat to 70°C at a rate of 5°C / min, keep warm for 15 minutes, overflow for 10 minutes, and dry.

[0038] Comparative Example 2 A dyeing process for wool fabric comprises the following steps: S1, add 2g of the complex enzyme preparation to 15g of water and stir evenly, add 2g of cyclodextrin thereto, stir at a temperature of 50°C for 1h, a stirring speed of 500r / min, freeze-dry, and crush to obtain a first material; The biological enzyme activity in the complex enzyme preparation is 2×10 3 u / g lipase and activity is 2×10 3 u / g of laccase; S2, add 6g of chitosan to 50g of 1mol / L HCl and stir evenly, adjust the system temperature to 50°C, use 1mol / L NaOH solution to adjust the system pH to 5, add 2g of carboxymethyl cellulose and stir for 1h at a stirring speed of 500r / min; spray the first material with an intermittent spraying method for 15min at a spraying temperature of 30°C, and dry at a drying temperature of 50°C to obtain bio-enzyme microcapsules; S3, put bio-enzyme microcapsules, 1.5g silica, 1.5g calcium chloride, 15g acid orange-red dye in the same bath to dye wool fabric. During the dyeing process, first dye at room temperature and pH 6, then heat to 40℃ and keep warm for 40min, then lower the pH value to 5 again, heat to 50℃ at a rate of 1℃ / min, and keep warm for 20min. After dyeing, overflow with 40℃ warm water for 15min, heat to 75℃ at a rate of 5℃ / min, keep warm for 5min, overflow with 40℃ warm water for 5min; use 40℃ warm water again, heat to 70℃ at a rate of 5℃ / min, keep warm for 15min, overflow for 10min, and dry.

[0039] Comparative Example 3 A dyeing process for wool fabric comprises the following steps: S1, add 2g of the complex enzyme preparation to 15g of water and stir evenly, add 2g of cyclodextrin thereto, stir at a temperature of 50°C for 1h, a stirring speed of 500r / min, freeze-dry, and crush to obtain a first material; The biological enzymes in the complex enzyme preparation include an activity of 2×10 3 u / g of LanL enzyme, activity of 2×10 3 u / g lipase and activity is 2×10 3 u / g of laccase; S2, add 6g of chitosan to 50g of 1mol / L HCl and stir evenly, adjust the system temperature to 50°C, use 1mol / L NaOH solution to adjust the system pH to 5, add 2g of carboxymethyl cellulose and stir for 1h at a stirring speed of 500r / min; spray the first material with an intermittent spraying method for 15min at a spraying temperature of 30°C, and dry at a drying temperature of 50°C to obtain bio-enzyme microcapsules; S3. Put bio-enzyme microcapsules, 1.5g calcium chloride, and 15g acid orange-red dye in the same bath to dye wool fabric. During the dyeing process, dyeing is first carried out at room temperature and pH 6, then heated to 40℃ and kept warm for 40min, then the pH value is lowered to 5 again, heated to 50℃ at a rate of 1℃ / min, and kept warm for 20min. After dyeing, overflow with 40℃ warm water for 15min, heat to 75℃ at a rate of 5℃ / min, keep warm for 5min, overflow with 40℃ warm water for 5min; use 40℃ warm water again, heat to 70℃ at a rate of 5℃ / min, keep warm for 15min, overflow for 10min, and dry.

[0040] test The wool fabrics were dyed by the process of Example 5 and Comparative Examples 1-3. The finished products were Example 5 and Comparative Examples 1-3, respectively. The wool fabrics were directly dyed with dyes and then used as the control group. The tests were performed respectively.

[0041] 1. Determination of dye uptake The absorbance of each group of dyeing residual liquid was measured with a 721 photoelectric spectrophotometer to calculate the dyeing rate. The absorbance of the dyeing liquid before and after sampling was tested with a spectrophotometer, and samples were taken every 2 minutes.

[0042] Dyeing rate = (A0-A1) / A0×100%, where A0 is the absorbance value before sampling; A1 is the absorbance value after sampling.

[0043] Results from Figure 1 As shown, the dyeing rate of the wool fabric dyeing product in Example 5 is the highest, which is better than that in Comparative Examples 1-3 and the control group.

[0044] 2. Determination of color fastness to soaping The amount of color loss after soaping is measured to judge the quality of soaping fastness. The soaping conditions are 4g / L silk and wool detergent, bath ratio 50:1, temperature 40℃, and time 10min.

[0045] Results from Figure 2 As shown, the wool fabric dyed product of Example 5 has the highest soap fastness, which is better than that of Comparative Examples 1-3 and the control group.

[0046] 3. Determination of color fastness The washing fastness is tested according to the national standard ISO105-C06-2010.

[0047] The color fastness to rubbing was tested according to GB / T 3920-2008 “Textiles—Tests for color fastness—Color fastness to rubbing”.

[0048] The color fastness to perspiration was tested according to GB / T 3922-2013 “Textiles—Tests for color fastness—Color fastness to perspiration”.

[0049] Results from Figure 3 As shown, the dyeing fastness of the wool fabric dyed product in Example 5 is the highest, which is better than that in Comparative Examples 1-3 and the control group.

[0050] 4. Determination of dyeing uniformity Use professional colorimeter and spectrum analyzer to evaluate dyeing uniformity. By measuring the color intensity and distribution on the fabric surface, the color difference value is calculated to quantitatively analyze the uniformity of dyeing.

[0051] Results from Figure 4 and Figure 5 As shown, the color difference value of the wool dyeing finished product in Example 5 is the lowest, and the improvement rate of dyeing uniformity compared with the control group is the highest, which is better than that of Comparative Examples 1-3.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A biological enzyme composite low-temperature dyeing process for wool fabric, characterized in that: The steps include: S1. Add 1-3 parts of the complex enzyme preparation by weight to 10-20 parts of water and stir evenly, add 1-3 parts of cyclodextrin thereto, stir, dry, and crush to obtain a first material; S2, adding 5-7 parts of chitosan to 50-60 parts of hydrochloric acid and stirring evenly, adjusting the system temperature to 50-60°C, using a NaOH solution with a concentration of 0.8-1.2 mol / L to adjust the system pH to 5-6, adding 1-3 parts of carboxymethyl cellulose and stirring for 1-2h at a stirring speed of 100-500r / min, and coating the surface of the first material by spray drying to obtain bio-enzyme microcapsules; S3. Put bio-enzyme microcapsules, 1-2 parts of silicon dioxide, 1-2 parts of calcium chloride, and 10-20 parts of dyes in the same bath to dye wool fabrics. During the dyeing process, first dye at room temperature and a pH value of 6-6.5, then heat to 40-42°C at a rate of 0.5-1.5°C / min and keep warm for 40-50 minutes, then lower the pH value to 5-5.5, heat to 45-50°C at a rate of 0.5-1.5°C / min, keep warm for 20-25 minutes, and then treat and dry after dyeing.

2. The biological enzyme composite low-temperature dyeing process for wool fabric according to claim 1, characterized in that: In S1, the biological enzymes in the complex enzyme preparation include LanL enzyme, lipase and laccase.

3. The biological enzyme composite low-temperature dyeing process for wool fabric according to claim 2, characterized in that: In S1, the activity of Lanase in the complex enzyme preparation is 1-3×10 3 u / g, lipase activity is 1-3×10 3 u / g, laccase activity is 1-3×10 3 u / g.

4. The biological enzyme composite low-temperature dyeing process for wool fabric according to claim 1, characterized in that: In S1, cyclodextrin is added, stirred, and dried; During the stirring process, the stirring temperature is 50-60° C., the stirring time is 1-2 hours, the stirring speed is 100-500 r / min, and during the drying process, freezing is used for drying.

5. The biological enzyme composite low-temperature dyeing process for wool fabric according to claim 1, characterized in that: In S2, the hydrochloric acid concentration is 0.8-1.2 mol / L.

6. The biological enzyme composite low-temperature dyeing process for wool fabric according to claim 1, characterized in that: During the spray drying process in S2, the first material is sprayed for 15-20 minutes by intermittent spraying, the spraying temperature is 30-35°C, and the drying temperature is ≤50°C.

7. The biological enzyme composite low-temperature dyeing process for wool fabric according to claim 1, characterized in that: In S3, during the post-dyeing treatment process, 40-42°C warm water is used for overflow for 15-20 minutes, the temperature is increased to 70-75°C at a rate of 5-6°C / min, kept warm for 5-10 minutes, 40-42°C warm water is used for overflow for 5-10 minutes, the temperature is increased to 70-75°C at a rate of 5-6°C / min, kept warm for 10-15 minutes, and 40-42°C warm water is used for overflow for 10-15 minutes.

8. The biological enzyme composite low-temperature dyeing process for wool fabric according to claim 1, characterized in that: In S3, the dye is an acid dye, and the acid dye includes at least one of acid orange red, Coomassie brilliant blue, bromocresol green, bromocresol purple, azo dyes, bromophenol blue, acid fuchsin, methyl blue, and methylene blue.

9. The biological enzyme composite low-temperature dyeing process for wool fabric according to claim 1, characterized in that: In S3, the dye is a natural dye, and the natural dye is at least one of black wolfberry anthocyanin, purple cabbage blue pigment, gardenia yellow pigment, and madder dye.

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