A composite enzyme and polymer system based anti-bleeding laundry condensation bead and a preparation method thereof

Abstract

The application discloses a composite enzyme and polymer system-based anti-color-bleeding laundry condensation bead and a preparation method thereof, and relates to the technical field of laundry cleaning and care. The condensation bead contains a composite enzyme, a carboxymethylated polymer system, a non-ionic surfactant, a reaction control agent and deionized water. The composite enzyme is prepared by loading enzyme components on sodium alginate microspheres, and the carboxymethylated polymer system is obtained by compounding carboxymethylated hydroxyethyl cellulose and chitosan. During preparation, the non-ionic surfactant, the reaction control agent and the deionized water are mixed to prepare a base material, then the composite enzyme and the carboxymethylated polymer system are prepared into a mixed solution and added to the base material to form an emulsion, and finally, film drop forming is performed to obtain the anti-color-bleeding laundry condensation bead. After the condensation bead is contacted with water, the sodium alginate microspheres slowly swell and release the composite enzyme, enzyme molecules degrade macromolecular pigments, and the polymer locks the pigments through electrostatic adsorption and hydrogen bond action, so that the anti-color-bleeding effect is finally achieved.

Description

Technical Field

[0001] This application relates to the field of clothing cleaning and care technology, specifically to an anti-color bleeding laundry detergent pod based on a composite enzyme and polymer system and its preparation method. Background Technology

[0002] During the washing process, pigments shed from colored clothing can easily diffuse in the water, causing light-colored clothing to become stained, a problem known as color bleeding. This severely affects the appearance and lifespan of clothing. Existing anti-color bleeding technologies mainly include adding pigment adsorbents, chelating agents, or color-protecting agents, but they have significant limitations: pigment adsorbents are mostly physical adsorption agents with limited adsorption capacity and are prone to desorption, resulting in unstable anti-color bleeding effects; chelating agents can only assist in color protection for some metal ions and cannot block pigment diffusion at the source; color-protecting agents focus on protecting the pigments from fading from colored clothing, but their ability to treat already shed pigments is insufficient.

[0003] Therefore, developing a laundry detergent pod that can degrade and lock pigments at the source, has precise action of functional components, and provides both colorfastness and stain removal effectiveness has become a pressing technical problem to be solved in this field. Summary of the Invention

[0004] To overcome the technical shortcomings of existing laundry products, such as unstable color-blocking effects and potential conflicts between color-blocking and stain-removing functions, this paper provides a color-blocking laundry pod based on a complex enzyme and polymer system, along with its preparation method. The combined action of the complex enzyme and carboxymethylated polymer system achieves both color-blocking and stain-removing effects.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] In a first aspect, the present invention provides a colorfast laundry detergent pod based on a complex enzyme and polymer system, comprising: a complex enzyme, a carboxymethylated polymer system, a nonionic surfactant, a reaction regulator, and deionized water;

[0007] The complex enzyme was prepared by combining enzyme components with sodium alginate microspheres.

[0008] The enzyme components include laccase and alkaline cellulase;

[0009] The carboxymethylated polymer system is obtained by compounding carboxymethylated hydroxyethyl cellulose with chitosan; carboxymethylated hydroxyethyl cellulose is obtained by reacting hydroxyethyl cellulose with sodium haloacetate.

[0010] Furthermore, the preparation steps of the complex enzyme include:

[0011] Mix laccase and alkaline cellulase at a mass ratio of (3-5):(2-3), and add them to a 0.1-0.15 mol / L sodium dihydrogen phosphate-disodium hydrogen phosphate buffer solution to prepare an enzyme solution;

[0012] Sodium alginate microspheres were added to the enzyme solution and stirred for 2-3 hours at 25-30℃ and 150-200 rpm for adsorption. Then, the mixture was vacuum dried for 1-1.5 hours at 30-35℃ and a vacuum degree of -0.07 to -0.06 MPa to obtain the composite enzyme.

[0013] Furthermore, the sodium alginate microspheres have a particle size of 5-10 μm;

[0014] The total mass ratio of laccase and alkaline cellulase to sodium alginate microspheres was 1:(8-12).

[0015] Furthermore, the preparation steps of the carboxymethylated polymer system include:

[0016] Take hydroxyethyl cellulose with a molecular weight of 50,000-80,000 and add it to deionized water to prepare a solution with a mass fraction of 6-9%. Add sodium haloacetate at a mass ratio of hydroxyethyl cellulose to sodium haloacetate of 1:(0.8-1.2). After stirring and dissolving, add 20-30% NaOH solution to adjust the pH of the system to 10-11 and maintain the reaction at 50-60℃ for 2-3 hours. After the reaction is completed, precipitate with anhydrous ethanol, filter, and vacuum dry at 40-50℃ for 4-5 hours to obtain carboxymethylated hydroxyethyl cellulose.

[0017] The preparation method of the carboxymethylated polymer system is as follows: chitosan is added to an acetic acid solution with a mass fraction of 1% to prepare a chitosan solution with a mass fraction of 3-5%; then carboxymethylated hydroxyethyl cellulose is added to it, and the mixture is stirred at 45-50℃ for 30-40 min to obtain the carboxymethylated polymer system.

[0018] Furthermore, the mass ratio of carboxymethylated hydroxyethyl cellulose to chitosan solution is (30-40):(60-70); sodium haloacetate includes either sodium chloroacetate or sodium bromoacetate.

[0019] Furthermore, the nonionic surfactant includes any one of lauryl alcohol polyoxyethylene ether or cocoyl glucoside; the reaction regulator includes any one of 0.05-0.1 mol / L tris(hydroxymethyl)aminomethane-hydrochloric acid buffer or 0.08-0.12 mol / L piperazine-1,4-diethanesulfonic acid-sodium hydroxide buffer; the reaction regulator adjusts the pH of the laundry detergent pod system to 6-7.5.

[0020] Furthermore, the mass ratio of the complex enzyme, carboxymethylated polymer system, nonionic surfactant, reaction regulator and deionized water is (15-20): (15-18): (25-30): (10-12): (20-35).

[0021] Secondly, this application provides a method for preparing the aforementioned anti-color bleeding laundry detergent pods based on a composite enzyme and polymer system, comprising the following steps:

[0022] S1. Add nonionic surfactant and reaction regulator to deionized water, stir at 35-40℃ for 20-30 min to obtain the base material;

[0023] S2. Add the complex enzyme and carboxymethylated polymer system to deionized water and stir for 15-20 min at 25-30℃ and 200-250 rpm to obtain a mixture. Then add the mixture to the above base material and stir for 40-50 min at 28-32℃ and 120-150 rpm to form an emulsion.

[0024] S3. The above emulsion is processed into individual beads using a drop film forming device, and then vacuum dried until the film is set, to obtain a color-blocking laundry detergent bead based on a composite enzyme and polymer system.

[0025] Furthermore, in S1, the mixing speed of the base material is 400-600 rpm.

[0026] Furthermore, in S3, the vacuum drying temperature is 30-35℃, the vacuum degree is -0.08 to -0.07MPa, and the drying time is 2-3h.

[0027] This application describes color-transfer bleed laundry detergent pods prepared based on a complex enzyme and polymer system. When the laundry detergent pods dissolve in water, the porous sodium alginate microspheres slowly swell, releasing laccase and alkaline cellulase loaded into their internal pores through this swelling effect. This loading method protects the enzyme molecules through a physical barrier, preventing direct exposure to high concentrations of surfactants or complex environments during storage and the initial washing phase, thus reducing the risk of enzyme inactivation. The alkaline cellulase in the complex enzyme breaks down the microfibers on the surface of clothing fibers, reducing the initial attachment sites of pigments on the fiber surface and weakening the binding of pigments to clothing. The laccase disrupts the colored core structure of shed pigments from clothing, such as conjugated double bonds, degrading large pigment molecules that easily diffuse in water and stain light-colored clothing into negatively charged small pigment molecules.

[0028] The polymer system captures degraded pigments: on one hand, the abundant positively charged amino groups in chitosan within the polymer system can electrostatically adsorb the negatively charged pigment molecules after degradation, achieving initial pigment capture; on the other hand, the abundant carboxyl and hydroxyl groups in hydroxyethyl cellulose and the abundant amino and hydroxyl groups in chitosan form hydrogen bonds with the hydroxyl and amino groups in the pigment molecules, further enhancing the binding stability between the pigment and the polymer and preventing pigment desorption. Simultaneously, the nonionic surfactants in the system remove stains from the surface of clothing, preventing stains from binding with pigments to form stubborn stains, achieving both colorfastness and stain removal.

[0029] Beneficial technical effects:

[0030] This application provides a color-blocking laundry detergent pod based on a composite enzyme and polymer system and its preparation method, comprising: a composite enzyme, a carboxymethylated polymer system, a nonionic surfactant, a reaction regulator, and deionized water. The enzyme molecules are loaded onto porous sodium alginate microspheres to reduce the risk of enzyme inactivation; the carboxymethylated polymer system is composed of carboxymethylated hydroxyethyl cellulose and chitosan. When the pods dissolve in water, the porous sodium alginate microspheres slowly swell, releasing laccase and alkaline cellulase loaded within their internal pores through swelling. Alkaline cellulase cleans the microfibers on the fiber surface, reducing initial pigment attachment sites; laccase destroys the colored core structure of the pigment, degrading large pigment molecules into negatively charged small molecules. The carboxyl and amino groups in the polymer and chitosan form hydrogen bonds with the hydroxyl and amino groups in the small pigment molecules, further enhancing the pigment capture effect and achieving the color-blocking effect. Attached Figure Description

[0031] Figure 1 A flowchart illustrating the preparation method of anti-color bleeding laundry detergent pods based on a composite enzyme and polymer system provided in this application. Detailed Implementation

[0032] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, a detailed description of specific embodiments of this application will be provided below.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0034] Example 1

[0035] like Figure 1 As shown, this embodiment provides a colorfast laundry detergent pod based on a composite enzyme and polymer system and its preparation method, including the following steps:

[0036] Laccase and alkaline cellulase were mixed at a mass ratio of 3:2 and added to a 0.1 mol / L sodium dihydrogen phosphate-disodium hydrogen phosphate buffer solution to prepare an enzyme solution of 10 mg / mL. Sodium alginate microspheres with a particle size of 5 μm were added to the enzyme solution, and the mass ratio of the total mass of laccase and alkaline cellulase to the mass of sodium alginate microspheres was controlled at 1:8. The mixture was stirred and adsorbed at 25 °C and 150 rpm for 2 h. After adsorption was completed, the mixture was vacuum dried at 30 °C and a vacuum degree of -0.07 MPa for 1 h to obtain the composite enzyme.

[0037] Hydroxyethyl cellulose with a molecular weight of 50,000 was added to deionized water to prepare a 6% (w / w) solution. Sodium chloroacetate was added at a mass ratio of 1:0.8 to hydroxyethyl cellulose. After stirring and dissolving, 20 wt.% NaOH solution was added to adjust the pH of the system to 10, and the reaction was maintained at 50°C for 2 h. After the reaction was completed, the cellulose was precipitated with anhydrous ethanol, filtered, and then vacuum dried at 40°C for 4 h to obtain carboxymethylated hydroxyethyl cellulose.

[0038] Chitosan was added to a 1% acetic acid solution to prepare a 3% chitosan solution. The chitosan solution was then added at a mass ratio of 30:70 to carboxymethylated hydroxyethyl cellulose. The mixture was stirred at 45°C for 30 minutes and then stirred for another 20 minutes to obtain the carboxymethylated polymer system.

[0039] S1. Add lauryl alcohol polyoxyethylene ether and tris(hydroxymethyl)aminomethane-hydrochloric acid buffer to deionized water, stir at 35°C and 400 rpm for 20 min to obtain the base material; S2. Add the complex enzyme and carboxymethylated polymer system to a small amount of deionized water, stir at 25°C and 200 rpm for 15 min to obtain the mixture; add the mixture to the base material, stir at 28°C and 120 rpm for 40 min to form an emulsion; S3. Use a drop film forming device to form single beads, dry at 30°C and vacuum degree -0.08 MPa for 2 h until the membrane is set to obtain anti-color bleeding laundry beads.

[0040] The mass ratio of the compound enzyme, carboxymethylated polymer system, nonionic surfactant, reaction regulator and deionized water is 15:15:25:10:35.

[0041] Example 2

[0042] like Figure 1 As shown, this embodiment provides a colorfast laundry detergent pod based on a composite enzyme and polymer system and its preparation method, including the following steps:

[0043] Laccase and alkaline cellulase were mixed at a mass ratio of 5:3 and added to a 0.15 mol / L sodium dihydrogen phosphate-disodium hydrogen phosphate buffer solution to prepare an enzyme solution of 15 mg / mL. Sodium alginate microspheres with a particle size of 10 μm were added to the enzyme solution, and the mass ratio of the total mass of laccase and alkaline cellulase to the mass of sodium alginate microspheres was controlled at 1:12. The mixture was stirred and adsorbed at 30℃ and 200 rpm for 3 h. After adsorption was completed, the mixture was vacuum dried at 35℃ and a vacuum degree of -0.06 MPa for 1.5 h to obtain the composite enzyme.

[0044] Hydroxyethyl cellulose with a molecular weight of 80,000 was added to deionized water to prepare a 9% (w / w) solution. Sodium bromoacetate was added at a mass ratio of 1:1.2 to hydroxyethyl cellulose. After stirring and dissolving, 30 wt.% NaOH solution was added to adjust the pH of the system to 11, and the reaction was maintained at 60°C for 3 h. After the reaction was completed, the precipitate was precipitated with anhydrous ethanol, filtered, and then vacuum dried at 50°C for 5 h to obtain carboxymethylated hydroxyethyl cellulose.

[0045] Chitosan was added to a 1% acetic acid solution to prepare a 5% chitosan solution. The chitosan solution was then added at a mass ratio of 40:60 to carboxymethylated hydroxyethyl cellulose. The mixture was stirred at 50°C for 40 minutes and then stirred for another 25 minutes to obtain the carboxymethylated polymer system.

[0046] S1. Add cocoyl glucoside and piperazine-1,4-diethanesulfonic acid-sodium hydroxide buffer to deionized water, stir at 40°C and 600 rpm for 30 min to obtain the base material; S2. Add the complex enzyme and carboxymethylated polymer system to a small amount of deionized water, stir at 30°C and 250 rpm for 20 min to obtain the mixture; add the mixture to the base material, stir at 32°C and 150 rpm for 50 min to form an emulsion; S3. Use a drop film forming device to form single beads, dry at 35°C and vacuum degree -0.07 MPa for 3 h until the membrane is set to obtain anti-color bleeding laundry beads.

[0047] The mass ratio of the complex enzyme, carboxymethylated polymer system, nonionic surfactant, reaction regulator and deionized water is 20:18:30:12:20.

[0048] Example 3

[0049] like Figure 1 As shown, this embodiment provides a colorfast laundry detergent pod based on a composite enzyme and polymer system and its preparation method, including the following steps:

[0050] Laccase and alkaline cellulase were mixed at a mass ratio of 4:2.5 and added to a 0.125 mol / L sodium dihydrogen phosphate-disodium hydrogen phosphate buffer solution to prepare an enzyme solution of 12.5 mg / mL. Sodium alginate microspheres with a particle size of 7.5 μm were added to the enzyme solution, and the mass ratio of the total mass of laccase and alkaline cellulase to the mass of sodium alginate microspheres was controlled at 1:10. The mixture was stirred and adsorbed at 27.5 °C and 175 rpm for 2.5 h. After adsorption, the mixture was vacuum dried at 32.5 °C and -0.065 MPa for 1.25 h to obtain the composite enzyme.

[0051] Hydroxyethyl cellulose with a molecular weight of 65,000 was added to deionized water to prepare a 7.5% (w / w) solution. Sodium chloroacetate was added at a mass ratio of 1:1.0 to hydroxyethyl cellulose. After stirring and dissolving, 25 wt.% NaOH solution was added to adjust the pH of the system to 10.5, and the reaction was maintained at 55°C for 2.5 h. After the reaction was completed, the cellulose was precipitated with anhydrous ethanol, filtered, and then vacuum dried at 45°C for 4.5 h to obtain carboxymethylated hydroxyethyl cellulose.

[0052] Chitosan was added to a 1% acetic acid solution to prepare a 4% chitosan solution. The chitosan solution was then added at a mass ratio of 35:65 to carboxymethylated hydroxyethyl cellulose. The mixture was stirred at 47°C for 35 minutes and then stirred for another 22 minutes to obtain the carboxymethylated polymer system.

[0053] S1. Add lauryl alcohol polyoxyethylene ether and tris(hydroxymethyl)aminomethane-hydrochloric acid buffer to deionized water, stir at 38°C and 500 rpm for 25 min to obtain the base material; S2. Add the complex enzyme and carboxymethylated polymer system to a small amount of deionized water, stir at 27°C and 220 rpm for 17 min to obtain the mixture; add the mixture to the base material, stir at 30°C and 130 rpm for 45 min to form an emulsion; S3. Use a drop film forming device to form single beads, dry at 32°C and vacuum degree -0.075 MPa for 2.5 h until the film is set to obtain anti-color bleeding laundry beads.

[0054] The mass ratio of the complex enzyme, carboxymethylated polymer system, nonionic surfactant, reaction regulator and deionized water is 17.5:15:27.5:11:29.

[0055] Example 4

[0056] like Figure 1 As shown, this embodiment provides a colorfast laundry detergent pod based on a composite enzyme and polymer system and its preparation method, including the following steps:

[0057] Laccase and alkaline cellulase were mixed at a mass ratio of 3.5:2.2 and added to a 0.13 mol / L sodium dihydrogen phosphate-disodium hydrogen phosphate buffer solution to prepare an enzyme solution of 13 mg / mL. Sodium alginate microspheres with a particle size of 6 μm were added to the enzyme solution, and the mass ratio of the total mass of laccase and alkaline cellulase to the mass of sodium alginate microspheres was controlled at 1:9. The mixture was stirred and adsorbed at 28 °C and 180 rpm for 2.3 h. After adsorption, the mixture was vacuum dried at 33 °C and -0.068 MPa for 1.3 h to obtain the composite enzyme.

[0058] Hydroxyethyl cellulose with a molecular weight of 70,000 was added to deionized water to prepare an 8% (w / w) solution. Sodium bromoacetate was added at a mass ratio of 1:0.9 to hydroxyethyl cellulose. After stirring and dissolving, 20 wt.% NaOH solution was added to adjust the pH of the system to 10.3, and the reaction was maintained at 50°C for 2.2 h. After the reaction was completed, the precipitate was precipitated with anhydrous ethanol, filtered, and then vacuum dried at 42°C for 4.3 h to obtain carboxymethylated hydroxyethyl cellulose.

[0059] Chitosan was added to a 1% acetic acid solution to prepare a 3.5% chitosan solution. The chitosan solution was then added at a mass ratio of 32:68 to carboxymethylated hydroxyethyl cellulose. The mixture was first stirred at 46°C for 32 min, and then stirred for another 23 min to obtain the carboxymethylated polymer system.

[0060] S1. Add cocoyl glucoside and piperazine-1,4-diethanesulfonic acid-sodium hydroxide buffer to deionized water and stir at 36°C and 550 rpm for 22 min to obtain the base material; S2. Add the complex enzyme and carboxymethylated polymer system to a small amount of deionized water and stir at 26°C and 230 rpm for 16 min to obtain the mixture; add the mixture to the base material and stir at 29°C and 140 rpm for 42 min to form an emulsion; S3. Use a drop film forming device to form single beads, and dry them at 31°C and vacuum degree -0.078 MPa for 2.2 h until the membrane is set to obtain anti-color bleeding laundry beads.

[0061] The mass ratio of the complex enzyme, carboxymethylated polymer system, nonionic surfactant, reaction regulator and deionized water is 20:15:28:12:25.

[0062] Comparative Example 1

[0063] This comparative example provides a color-blocking laundry detergent pod based on a complex enzyme and polymer system and its preparation method. The difference from Example 1 is that this comparative example does not prepare or use a complex enzyme, but other process parameters and operating steps are exactly the same as in Example 1.

[0064] Comparative Example 2

[0065] This comparative example provides a colorfast laundry detergent pod based on a complex enzyme and polymer system and its preparation method. The difference between this comparative example and Example 1 is that this comparative example does not prepare or use a carboxymethylated polymer system, while other process parameters and operating steps are exactly the same as in Example 1.

[0066] The performance of the color-blocking laundry detergent pods based on the composite enzyme and polymer system prepared in Examples 1-4 and Comparative Examples 1-2 was tested, and the results are shown in Table 1.

[0067] Table 1. Performance test results of anti-color bleeding laundry pods based on the composite enzyme and polymer system prepared in Examples 1-4 and Comparative Examples 1-2.

[0068] Example 1 0.95 1.43 1.36 96.5% Example 2 0.88 1.47 1.39 97.2% Example 3 0.92 1.45 1.37 96.8% Example 4 0.90 1.44 1.38 96.9% Comparative Example 1 5.0 1.14 1.07 88.0% Comparative Example 2 4.8 1.16 1.09 88.6%

[0069] Examples 1-4 demonstrate excellent anti-color bleeding and stain removal effects achieved through the combined action of amino-modified complex enzymes and carboxymethylated polymer systems. The color difference ΔE for anti-color bleeding was controlled between 0.90 and 0.95, the stain removal value (DP) for carbon black soiled cloth reached 1.43-1.47, and the stain removal value (DP) for protein soiled cloth was 1.36-1.39. Furthermore, the retention rate of anti-color bleeding performance was as high as 96.5-97.2% after 6 months of storage. When the laundry detergent pods dissolve in water, the porous sodium alginate microspheres slowly swell, releasing laccase and alkaline cellulase loaded into their internal pores through swelling. This loading method protects the enzyme molecules through a physical barrier, preventing direct exposure to high concentrations of surfactants or complex environments during storage and the initial washing stages, thus reducing the risk of enzyme inactivation. The alkaline cellulase in the complex enzyme breaks down the microfibers on the surface of clothing fibers, reducing the initial attachment sites of pigments on the fiber surface and weakening the binding of pigments to clothing. Laccase destroys the colored core structure of pigments shed from clothing, such as conjugated double bonds, degrading large-molecule pigments that are originally easy to diffuse in water and easily stain light-colored clothing into negatively charged small-molecule pigments. Then, the chitosan amino groups in the carboxymethylated polymer system achieve initial capture through electrostatic adsorption between the small pigment molecules and the chitosan amino groups. The carboxyl and hydroxyl groups of hydroxyethyl cellulose and the amino and hydroxyl groups of chitosan enhance the pigment binding stability through hydrogen bonds. At the same time, the nonionic surfactant efficiently removes stains from the surface of clothing, achieving the simultaneous effect of preventing color bleeding and removing stains.

[0070] Comparative Example 1, lacking the addition of the complex enzyme, missed a crucial step in pigment degradation, failing to convert easily diffusing macromolecular pigments into easily captured small molecules. This resulted in a color difference ΔE as high as 5.0, significantly higher than the example. Furthermore, the stain removal values ​​(DP) for carbon black and protein-soaked cloth were only 1.14 and 1.07, respectively, and the retention rate of anti-color-bleeding performance dropped to 88.0% after storage. This result confirms the core role of the amino-modified complex enzyme in pigment degradation and auxiliary stain removal. Without this component, the polymer system can only weakly adsorb pigments, failing to achieve efficient anti-color-bleeding.

[0071] In Comparative Example 2, without the addition of the carboxymethylated polymer system, although the sodium alginate microspheres could still swell and release the complex enzyme normally to degrade the macromolecular pigments, the lack of targeted locking of the degraded small pigment molecules meant that there was neither electrostatic adsorption between chitosan amino groups and the pigments nor hydrogen bonding reinforcement. This allowed the small pigment molecules to diffuse freely in the washing liquid, resulting in a color difference ΔE of 4.8, and a significant decrease in both detergency and storage stability. The DP for carbon black soiled cloth was 1.16, and for protein soiled cloth it was 1.09, with a color retention rate of 88.6% after storage. Therefore, the carboxymethylated polymer system is the core carrier for pigment capture, and its synergistic effect with the complex enzyme is key to achieving color retention and enhanced detergency in this application.

[0072] It should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application, and all such modifications and substitutions should be covered within the scope of the claims of this application.

Claims

1. A color-transfer bleed laundry detergent pod based on a composite enzyme and polymer system, characterized in that, Components include: complex enzyme, carboxymethylated polymer system, nonionic surfactant, reaction regulator and deionized water; The composite enzyme was prepared by combining enzyme components with sodium alginate microspheres. The enzyme components include laccase and alkaline cellulase; The carboxymethylated polymer system is obtained by compounding carboxymethylated hydroxyethyl cellulose with chitosan; the carboxymethylated hydroxyethyl cellulose is obtained by reacting hydroxyethyl cellulose with sodium haloacetate.

2. The anti-color bleeding laundry detergent pod based on a composite enzyme and polymer system according to claim 1, characterized in that, The preparation steps of the complex enzyme include: Mix laccase and alkaline cellulase at a mass ratio of (3-5):(2-3), and add them to a 0.1-0.15 mol / L sodium dihydrogen phosphate-disodium hydrogen phosphate buffer solution to prepare an enzyme solution; Sodium alginate microspheres were added to the enzyme solution and stirred at 25-30℃ and 150-200 rpm for 2-3 hours. Then, the mixture was vacuum dried at 30-35℃ and a vacuum degree of -0.07 to -0.06 MPa for 1-1.5 hours to obtain the composite enzyme.

3. The anti-color bleeding laundry detergent pod based on a composite enzyme and polymer system according to claim 2, characterized in that, The sodium alginate microspheres have a particle size of 5-10 μm. The total mass ratio of laccase and alkaline cellulase to the mass ratio of sodium alginate microspheres is 1:(8-12).

4. The anti-color bleeding laundry detergent pod based on a composite enzyme and polymer system according to claim 1, characterized in that, The preparation steps of the carboxymethylated hydroxyethyl cellulose include: Take hydroxyethyl cellulose with a molecular weight of 50,000-80,000 and add it to deionized water to prepare a solution with a mass fraction of 6-9%. Add sodium haloacetate at a mass ratio of hydroxyethyl cellulose to sodium haloacetate of 1:(0.8-1.2). After stirring and dissolving, add 20-30% NaOH solution to adjust the pH of the system to 10-11 and maintain the reaction at 50-60℃ for 2-3 hours. After the reaction is completed, precipitate with anhydrous ethanol, filter, and vacuum dry at 40-50℃ for 4-5 hours to obtain carboxymethylated hydroxyethyl cellulose. The method for preparing the carboxymethylated polymer system is as follows: chitosan is added to an acetic acid solution with a mass fraction of 1% to prepare a chitosan solution with a mass fraction of 3-5%; then carboxymethylated hydroxyethyl cellulose is added to it, and the mixture is stirred at 45-50℃ for 30-40 minutes to obtain the carboxymethylated polymer system.

5. The anti-color bleeding laundry detergent pod based on a composite enzyme and polymer system according to claim 4, characterized in that, The mass ratio of the carboxymethylated hydroxyethyl cellulose to the chitosan solution is (30-40):(60-70); the sodium haloacetate includes either sodium chloroacetate or sodium bromoacetate.

6. The anti-color bleeding laundry detergent pods based on a composite enzyme and polymer system according to claim 1, characterized in that, The nonionic surfactant includes either lauryl polyoxyethylene ether or cocoyl glucoside; The reaction regulator includes either 0.05-0.1 mol / L of tris(hydroxymethyl)aminomethane-hydrochloric acid buffer or 0.08-0.12 mol / L of piperazine-1,4-diethanesulfonic acid-sodium hydroxide buffer. The reaction regulator adjusts the pH of the laundry detergent pod system to 6-7.

5.

7. The anti-color bleeding laundry detergent pods based on a composite enzyme and polymer system according to claim 1, characterized in that, The mass ratio of the composite enzyme, carboxymethylated polymer system, nonionic surfactant, reaction regulator and deionized water is (15-20): (15-18): (25-30): (10-12): (20-35).

8. A method for preparing anti-color bleeding laundry detergent pods based on a composite enzyme and polymer system as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Add nonionic surfactant and reaction regulator to deionized water, stir at 35-40℃ for 20-30 min to obtain the base material; S2. Add the complex enzyme and carboxymethylated polymer system to deionized water and stir for 15-20 min at 25-30℃ and 200-250 rpm to obtain a mixture. Then add the mixture to the above base material and stir for 40-50 min at 28-32℃ and 120-150 rpm to form an emulsion. S3. The above emulsion is processed into individual beads using a drop film forming device, and then vacuum dried until the film is set, to obtain a color-blocking laundry detergent bead based on a composite enzyme and polymer system.

9. The method for preparing anti-color bleeding laundry detergent pods based on a composite enzyme and polymer system according to claim 8, characterized in that, In S1, the stirring speed of the base material is 400-600 rpm.

10. The method for preparing anti-color bleeding laundry detergent pods based on a composite enzyme and polymer system according to claim 8, characterized in that, In S3, the vacuum drying temperature is 30-35℃, the vacuum degree is -0.08 to -0.07MPa, and the drying time is 2-3h.

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