Antibacterial detergent containing tea saponin and preparation method thereof

Abstract

The invention relates to the technical field of detergents, in particular to a tea saponin-containing antibacterial detergent and a preparation method thereof. The preparation method comprises the following steps: mixing deionized water, tea saponin, dodecylbenzene sulfonic acid, vanillin, guar gum, glycerol, aromatherapy essential oil, a zeolite silver-loaded antibacterial agent and sodium hydroxide, and granulating to obtain tea saponin-containing antibacterial detergent powder; taking an oxidized starch-gelatin composite gel solution as a capsule inner shell wall material, reacting ethylenediamine tetraacetic acid with chitosan to obtain a chelating agent, mixing the chelating agent with a hydroxypropyl methylcellulose solution to obtain an outer shell wall material, and spraying the outer shell wall material to the surface of the capsule inner shell wall material to obtain a composite capsule shell; and packaging the tea saponin-containing antibacterial detergent powder by using the composite capsule shell to obtain the tea saponin-containing antibacterial detergent. The detergent prepared by the invention is good in foaming ability and strong in decontamination effect, and also has excellent antibacterial performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detergents, in particular to a tea saponin-containing antibacterial detergent and a preparation method thereof. BACKGROUND

[0002] Traditional chemical detergents often contain harmful substances such as phosphates and fluorescent whitening agents, which can pollute the environment. Tea saponin is a kind of glycoside compound extracted from tea tree seeds (such as tea seeds, tea leaf seeds). As a natural non-ionic surfactant, it has the advantages of non-toxicity, easy biodegradation, antibacterial and anti-inflammatory properties, etc. The application of tea saponin in the preparation of environmentally friendly detergents not only can clean stains, but also can inhibit the growth and reproduction of various bacteria and viruses, reduce the number of microorganisms on clothes, reduce the risk of allergies, effectively remove odors on clothes, and make clothes emit natural fragrance, which is very consistent with the current green and environmentally friendly development trend and consumer market demand.

[0003] Patent CN201710462062.8 discloses a clothes sterilization cleaning agent, which is prepared by compounding tea saponin with menthol, glycyrrhizic acid, ester-based quaternary ammonium salt, honeysuckle extract, aloe extract, plant essence, and water, and is used for protecting clothes and skin. Patent CN202010386602.0 provides a tea saponin detergent and a preparation method thereof, which is prepared by compounding tea saponin with fatty alcohol polyoxyethylene ether sodium sulfate, alpha-alkenyl sulfonate sodium, dodecylbenzenesulfonic acid, coconut oil fatty acid diethanolamide, fatty alcohol polyoxyethylene ether, sodium chloride, sodium bicarbonate, essence, preservative, ethylenediaminetetraacetic acid disodium, and deionized water, and uses tea saponin to improve the oil stain removal effect and sterilization effect of the detergent.

[0004] At present, when preparing detergents, tea saponin is mainly combined with anionic surfactants to improve the stain removal capacity. However, due to the high content of calcium and magnesium ions in daily use water, they will combine with anionic surfactants to form precipitates, affecting the stain removal effect. Although research has shown that adding chelating agents (such as EDTA, etc.) to detergents can reduce the influence of calcium and magnesium ions on anionic surfactants and improve the stain removal capacity, since the chelating agents are usually physically mixed with anionic surfactants, when the detergent is added to water (especially water with high content of calcium and magnesium ions), part of the anionic surfactants will still combine with calcium and magnesium ions, resulting in poor washing effect. In addition, the antibacterial capacity of single tea saponin is limited, so it is necessary to provide an antibacterial detergent containing tea saponin to improve the cleaning efficiency and antibacterial capacity. SUMMARY

[0005] The present application aims to provide a tea saponin-containing antibacterial detergent and a preparation method thereof to solve the problems in the background art.

[0006] In order to solve the above technical problems, the present application provides the following technical solutions: a preparation method of a tea saponin-containing antibacterial detergent, comprising the following steps: Step 1: mix and stir deionized water, tea saponin, dodecylbenzenesulfonic acid and vanillin at 80-90℃ for 10-30min; cool to 70-80℃, add guar gum and glycerol and stir for 5-10min; cool to 60-65℃, add essential oil and zeolite silver antibacterial agent and stir for 5-10min; cool to 25-35℃, add sodium hydroxide to adjust the pH value to 8-9 to obtain a mixture, and granulate the mixture to obtain tea saponin-containing antibacterial detergent powder; Step 2: encapsulate the tea saponin-containing antibacterial detergent powder in a composite capsule shell to obtain a tea saponin-containing antibacterial detergent.

[0007] Further, in step 1, the amount of each component is 30-45 parts by weight of deionized water, 15-23 parts by weight of tea saponin, 5-8 parts by weight of dodecylbenzenesulfonic acid, 6-10 parts by weight of vanillin, 4-5 parts by weight of guar gum, 0.3-0.5 parts by weight of glycerol, 5-7 parts by weight of essential oil, and 7-13 parts by weight of zeolite silver antibacterial agent.

[0008] Further, in step 2, the content of each component in the tea saponin-containing antibacterial detergent is 3-5% by weight of the composite capsule shell and 95-97% by weight of the tea saponin-containing antibacterial detergent powder.

[0009] Further, in step 2, the preparation method of the composite capsule shell comprises the following steps: S1: disperse ethylenediaminetetraacetic acid in anhydrous methanol to obtain an ethylenediaminetetraacetic acid dispersion; dissolve chitosan in an aqueous acetic acid solution to obtain a chitosan solution; add the ethylenediaminetetraacetic acid dispersion to the chitosan solution, stir and react at 25-35℃ for 24h, then wash, dry, and crush to obtain modified chitosan powder; S2: add hydroxypropyl methyl cellulose to deionized water and stir for 5-10h, then add glycerol and continue stirring for 10-15min, and then add the modified chitosan powder and ultrasonic dispersion to obtain a chitosan-hydroxypropyl methyl cellulose mixed solution; S3: disperse oxidized starch and gelatin in deionized water, add polyethylene glycol 600 and glycerol, stir at 70-80℃ for 10-30min, then add sodium dodecyl sulfate and stir for 3-5h to obtain an oxidized starch-gelatin composite gel solution; cool to 25-30℃ and gel for 2-3h, immerse the dipping mold in the oxidized starch-gelatin composite gel solution for 8-10s using the dipping method, and vacuum dry at 35-40℃ for 1-2h to obtain an inner capsule shell; coat the chitosan-hydroxypropyl methyl cellulose onto the surface of the inner shell to form an outer capsule shell; and vacuum dry at 35-40℃ for 1-2h to obtain a composite capsule shell.

[0010] Further, in S1, ethylenediamine tetraacetic acid and chitosan are reacted in a weight ratio of (3.5~4):1.

[0011] Further, in S1, the particle size of the modified chitosan powder is 10~30μm.

[0012] Further, in S2, in the chitosan-hydroxypropyl methyl cellulose mixed solution, the content of each component is 4~5 parts of hydroxypropyl methyl cellulose, 100 parts of deionized water, 0.8~1.2 parts of glycerol, and 1~2 parts of modified chitosan powder.

[0013] Further, in S3, in the oxidized starch-gelatin composite gel solution, the content of each component is 8~15 parts of oxidized starch, 8~15 parts of gelatin, 100 parts of deionized water, 3~3.4 parts of polyethylene glycol 600, 2~3 parts of glycerol, and 1~1.3 parts of sodium dodecyl sulfate.

[0014] Further, in S3, the average thickness of the inner shell of the composite capsule shell is 200~300μm, and the average thickness of the outer shell is 60~80μm.

[0015] Compared with the prior art, the present application has the following beneficial effects: the non-ionic surfactant tea saponin and the anionic surfactant sodium dodecyl sulfate are compounded to prepare a detergent, and the surface activity is improved and the decontamination effect is enhanced through the synergistic effect between the two different surfactant molecules.

[0016] Because there are many calcium and magnesium ions with positive charges in hard water, and the hydrophilic group of the anionic surfactant has a negative charge, the two are combined to form an ionic bond through electrostatic attraction, and an insoluble precipitate is generated, which leads to the destruction of water solubility, the reduction of surface activity, and the significant decrease of decontamination effect. Therefore, the detergent powder is packaged with a composite capsule shell in the present application, and the structure of the composite capsule shell is designed so that the release time of the chelating agent and the surfactant is different. The hydroxypropyl methyl cellulose of the outer shell of the composite capsule shell is dissolved in water and releases the chelating agent to combine with the calcium and magnesium ions in water, thereby reducing the hardness of water; after the outer shell is completely dissolved, the inner layer is in contact with water, swells and breaks to release the internal detergent powder; because a certain amount of time is needed for the dissolution of the detergent powder, therefore, from the dissolution of the outer shell to the complete dissolution of the detergent powder in water, the chelating agent has enough time to combine with the calcium and magnesium ions in water, and when the detergent powder is completely dissolved in water, the hardness of water has been greatly reduced, ensuring that the anionic surfactant in the detergent is not affected. The hydroxypropyl methyl cellulose dissolved in water in the outer shell has good viscosity, and can form a protective layer around the dirt particles during the washing process to prevent them from re-attaching to the fabric, thereby improving the washing effect. In the present application, vanillin and zeolite silver antibacterial agent are also added to produce a synergistic effect with tea saponin, thereby improving the antibacterial ability, and the clothes washed by the present application all show good antibacterial performance.

[0017] In addition, it needs to be pointed out that the chelating agent in the application is ethylenediaminetetraacetic acid modified chitosan, which is prepared by reacting the two according to a weight ratio of (3.5~4):1. The modified chitosan has good ability to chelate calcium and magnesium ions. In the actual research and development process, the researchers found that when the amount of ethylenediaminetetraacetic acid is too high, the excess ethylenediaminetetraacetic acid will play a crosslinking role, causing further crosslinking reaction between chitosan molecules, which will lead to a decrease in the number of chelating coordination sites provided by the modified chitosan and a decrease in the chelating ability of calcium and magnesium ions. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the application will be described below in a clear and complete manner. Obviously, the described embodiments are only some of the embodiments of the application, not all. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the application.

[0019] All materials and sources in the application: zeolite silver-containing antibacterial agent from Xuancheng Jingrui New Material Co., Ltd., silver content 1wt.%, average particle size 30nm, essential oil is rose essential oil from Shandong Huinong Rose Co., Ltd.; the rest of the materials are not limited, and are all commercially available goods.

[0020] Example 1: A preparation method of a tea saponin-containing antibacterial detergent, comprising the following steps: Step 1: S1: disperse ethylenediaminetetraacetic acid in anhydrous methanol to obtain an ethylenediaminetetraacetic acid dispersion; dissolve chitosan in an aqueous acetic acid solution to obtain a chitosan solution; add the ethylenediaminetetraacetic acid dispersion to the chitosan solution, stir and react at 25℃ for 24h, then wash, dry, and crush to obtain modified chitosan powder with a particle size of 10μm; wherein ethylenediaminetetraacetic acid and chitosan are reacted according to a weight ratio of 3.5:1; S2: add 4g of hypromellose to 100g of deionized water and stir for 5h, then add 0.8g of glycerol and continue to stir for 10min, then add 1g of modified chitosan powder and ultrasonic dispersion to obtain a chitosan-hypromellose mixed solution; S3: Take 8 g of oxidized starch and 8 g of gelatin and disperse them in 100 g of deionized water, add 3 g of polyethylene glycol 600 and 2 g of glycerol, stir at 70°C for 10 min, then add 1 g of sodium dodecyl sulfate and stir for 3 h, to obtain an oxidized starch-gelatin composite gel solution; cool to 25°C and gel for 2 h, immerse the dipping mold in the oxidized starch-gelatin composite gel solution for 8 s using the immersion method, and vacuum dry at 35°C for 1 h to obtain an inner capsule shell; coat the chitosan-hydroxypropyl methyl cellulose onto the surface of the inner shell to form an outer shell of the capsule; vacuum dry at 35°C for 1 h to obtain a composite capsule shell; in the composite capsule shell, the average thickness of the inner shell is 200 pm, and the average thickness of the outer shell is 60 pm; Step 2: At 80°C, mix 30 kg of deionized water, 15 kg of tea saponin, 5 kg of dodecylbenzenesulfonic acid, and 6 kg of vanillin and stir for 10 min; cool to 70°C, add 4 kg of guar gum and 0.3 kg of glycerol and stir for 5 min; cool to 60°C, add 5 kg of essential oil and 7 kg of zeolite silver antibacterial agent and stir for 5 min; cool to 25°C, add sodium hydroxide to adjust the pH value to 8 to obtain a mixture, and granulate the mixture to obtain a tea saponin-containing antibacterial detergent powder; Step 3: The tea saponin-containing antibacterial detergent powder is encapsulated in a composite capsule shell to obtain a tea saponin-containing antibacterial detergent, wherein the content of each component in the tea saponin-containing antibacterial detergent is 3% by weight of the composite capsule shell and 97% by weight of the tea saponin-containing antibacterial detergent powder.

[0021] Example 2: A preparation method of a tea saponin-containing antibacterial detergent, comprising the following steps: Step 1: S1: Disperse ethylenediaminetetraacetic acid in anhydrous methanol to obtain an ethylenediaminetetraacetic acid dispersion; dissolve chitosan in an aqueous acetic acid solution to obtain a chitosan solution; add the ethylenediaminetetraacetic acid dispersion to the chitosan solution, stir at 30°C for 24 h, then wash, dry, and crush to obtain a modified chitosan powder with a particle size of 25 pm; wherein the ethylenediaminetetraacetic acid and the chitosan are reacted at a weight ratio of 3.8:1; S2: Add 4.5 g of hydroxypropyl methyl cellulose to 100 g of deionized water and stir for 8 h, then add 1 g of glycerol and continue to stir for 13 min, and then add 1.4 g of modified chitosan powder and ultrasonic dispersion to obtain a chitosan-hydroxypropyl methyl cellulose mixed solution; S3: 11 g of oxidized starch and 13 g of gelatin were dispersed in 100 g of deionized water, 3.2 g of polyethylene glycol 600 and 2.7 g of glycerol were added, after stirring at 75℃ for 20 min, 1.1 g of sodium dodecyl sulfate was added and stirred for 4 h, to obtain an oxidized starch-gelatin composite gel solution; the temperature was lowered to 28℃ and the gel was incubated for 2.5 h, the dipping mold was immersed in the oxidized starch-gelatin composite gel solution for 9 s by dipping method, and vacuum drying was carried out at 37℃ for 1.5 h to obtain an inner shell of the capsule; the chitosan-hydroxypropyl methyl cellulose was coated on the surface of the inner shell to form an outer shell of the capsule; vacuum drying was carried out at 38℃ for 1.5 h to obtain a composite capsule shell; in the composite capsule shell, the average thickness of the inner shell was 260μm, and the average thickness of the outer shell was 74μm; Step 2: At 85℃, 38 kg of deionized water, 19 kg of tea saponin, 6 kg of dodecylbenzenesulfonic acid, and 8.5 kg of vanillin were mixed and stirred for 20 min; the temperature was lowered to 75℃, 4.5 kg of guar gum and 0.45 kg of glycerol were added and stirred for 8 min; the temperature was lowered to 63℃, 6.5 kg of essential oil and 10 kg of zeolite silver antibacterial agent were added and stirred for 7 min; the temperature was lowered to 30℃, sodium hydroxide was added to adjust the pH value to 8.5 to obtain a mixture, and the mixture was granulated to obtain a tea saponin-containing antibacterial detergent powder; Step 3: The tea saponin-containing antibacterial detergent powder was encapsulated in a composite capsule shell to obtain a tea saponin-containing antibacterial detergent, wherein the content of each component in the tea saponin-containing antibacterial detergent was 4% by weight of the composite capsule shell and 96% by weight of the tea saponin-containing antibacterial detergent powder.

[0022] Example 3: A preparation method of a tea saponin-containing antibacterial detergent, comprising the following steps: Step 1: S1: Ethylenediaminetetraacetic acid was dispersed in anhydrous methanol to obtain an ethylenediaminetetraacetic acid dispersion; chitosan was dissolved in an aqueous acetic acid solution to obtain a chitosan solution; the ethylenediaminetetraacetic acid dispersion was added to the chitosan solution, and after stirring at 35℃ for 24 h, the modified chitosan powder with a particle size of 30μm was obtained by washing, drying, and crushing; wherein the ethylenediaminetetraacetic acid and the chitosan were reacted at a weight ratio of 4:1; S2: 5 g of hydroxypropyl methyl cellulose was added to 100 g of deionized water and stirred for 10 h, then 1.2 g of glycerol was added and stirred for 15 min, and then 2 g of modified chitosan powder was added and ultrasonically dispersed to obtain a chitosan-hydroxypropyl methyl cellulose mixed solution; S3: Take 15 g of oxidized starch and 15 g of gelatin, disperse them in 100 g of deionized water, add 3.4 g of polyethylene glycol 600 and 3 g of glycerol, stir at 80℃ for 30 min, then add 1.3 g of sodium dodecyl sulfate and stir for 5 h, to obtain an oxidized starch-gelatin composite gel solution; cool to 30℃ and gel for 3 h, immerse the gelatinized mold in the oxidized starch-gelatin composite gel solution for 10 s by immersion method, and vacuum dry at 40℃ for 2 h to obtain an inner capsule shell; coat the chitosan-hydroxypropyl methyl cellulose onto the surface of the inner shell to form an outer shell of the capsule; vacuum dry at 40℃ for 2 h to obtain a composite capsule shell; in the composite capsule shell, the average thickness of the inner shell is 300μm, and the average thickness of the outer shell is 80μm; Step 2: At 90℃, mix and stir 45 kg of deionized water, 23 kg of tea saponin, 8 kg of dodecylbenzenesulfonic acid, and 10 kg of vanillin for 30 min; cool to 80℃, add 5 kg of guar gum and 0.5 kg of glycerol and stir for 10 min; cool to 65℃, add 7 kg of essential oil and 13 kg of zeolite silver antibacterial agent and stir for 10 min; cool to 35℃, add sodium hydroxide to adjust the pH value to 9 to obtain a mixture, and granulate the mixture to obtain a tea saponin-containing antibacterial detergent powder; Step 3: The tea saponin-containing antibacterial detergent powder is encapsulated in the composite capsule shell to obtain a tea saponin-containing antibacterial detergent, wherein the content of each component in the tea saponin-containing antibacterial detergent is 5% by weight of the composite capsule shell and 95% by weight of the tea saponin-containing antibacterial detergent powder.

[0023] Comparative Example 1: The modified chitosan powder prepared in Step 1 is blended and granulated with other components in Step 2 to prepare a tea saponin-containing antibacterial detergent powder, which is used as a detergent by a conventional method, and the remaining parameters are the same as those in Example 1.

[0024] Step 1: Disperse ethylenediaminetetraacetic acid in anhydrous methanol to obtain an ethylenediaminetetraacetic acid dispersion; dissolve chitosan in an aqueous acetic acid solution to obtain a chitosan solution; add the ethylenediaminetetraacetic acid dispersion to the chitosan solution, stir at 25℃ for 24 h, then wash, dry, and crush to obtain a modified chitosan powder with a particle size of 10μm; wherein the ethylenediaminetetraacetic acid and the chitosan are reacted at a weight ratio of 3.5:1; Step 2: Mix 30 kg of deionized water, 15 kg of tea saponin, 5 kg of dodecyl benzene sulfonic acid, and 6 kg of vanillin at 80℃ for 10 min; cool to 70℃, add 4 kg of guar gum and 0.3 kg of glycerol and stir for 5 min; cool to 60℃, add 5 kg of essential oil and 7 kg of zeolite silver antibacterial agent and stir for 5 min; cool to 25℃, add sodium hydroxide to adjust the pH value to 8 to obtain a mixture, add 2% of the total weight of the mixture to the modified chitosan powder, stir for 10 min, and then granulate to obtain a tea saponin-containing antibacterial detergent.

[0025] Comparative Example 2: The modified chitosan powder was directly added to the oxidized starch-gelatin composite gel solution to prepare a capsule shell, and the remaining data were the same as in Example 2.

[0026] Step 1: Ethylene diamine tetraacetic acid was dispersed in anhydrous methanol to obtain an ethylene diamine tetraacetic acid dispersion; chitosan was dissolved in an aqueous acetic acid solution to obtain a chitosan solution; the ethylene diamine tetraacetic acid dispersion was added to the chitosan solution, and after stirring at 30℃ for 24 h, washing, drying, and crushing were performed to obtain a modified chitosan powder with a particle size of 25μm; wherein the ethylene diamine tetraacetic acid and the chitosan were reacted in a weight ratio of 3.8:1; S2: Disperse 11 g of oxidized starch and 13 g of gelatin in 100 g of deionized water, add 3.2 g of polyethylene glycol 600 and 2.7 g of glycerol, stir at 75℃ for 20 min, then add 1.1 g of sodium dodecyl sulfate and 5 g of modified chitosan powder, and stir for 4 h to obtain an oxidized starch-gelatin composite gel solution containing chitosan; cool to 28℃ and gel for 2.5 h, immerse the dipping mold in the oxidized starch-gelatin composite gel solution containing chitosan for 9 s using the dipping method, and vacuum dry at 37℃ for 1.5 h to obtain a capsule shell; Step 2: Mix 38 kg of deionized water, 19 kg of tea saponin, 6 kg of dodecyl benzene sulfonic acid, and 8.5 kg of vanillin at 85℃ for 20 min; cool to 75℃, add 4.5 kg of guar gum and 0.45 kg of glycerol and stir for 8 min; cool to 63℃, add 6.5 kg of essential oil and 10 kg of zeolite silver antibacterial agent and stir for 7 min; cool to 30℃, add sodium hydroxide to adjust the pH value to 8.5 to obtain a mixture, and granulate the mixture to obtain a tea saponin-containing antibacterial detergent powder; Step 3: The tea saponin-containing antibacterial detergent powder is encapsulated in the capsule shell to obtain a tea saponin-containing antibacterial detergent, wherein the content of each component in the tea saponin-containing antibacterial detergent is 4% by weight of the capsule shell and 96% by weight of the tea saponin-containing antibacterial detergent powder.

[0027] Comparative Example 3: Increase the amount of ethylenediaminetetraacetic acid used in the preparation of modified chitosan, and the rest of the parameters are the same as Example 3.

[0028] Step 1: S1: Disperse ethylenediaminetetraacetic acid in anhydrous methanol to obtain an ethylenediaminetetraacetic acid dispersion; dissolve chitosan in an aqueous acetic acid solution to obtain a chitosan solution; add the ethylenediaminetetraacetic acid dispersion to the chitosan solution, stir at 35°C for 24h, then wash, dry, and crush to obtain a modified chitosan powder with a particle size of 30μm; wherein the ethylenediaminetetraacetic acid and chitosan are reacted in a weight ratio of 6:1; S2: Add 5g of hydroxypropyl methyl cellulose to 100g of deionized water and stir for 10h, then add 1.2g of glycerol and continue stirring for 15min, then add 2g of modified chitosan powder and ultrasonic dispersion to obtain a chitosan-hydroxypropyl methyl cellulose mixed solution; S3: Disperse 15g of oxidized starch and 15g of gelatin in 100g of deionized water, add 3.4g of polyethylene glycol 600 and 3g of glycerol, stir at 80°C for 30min, then add 1.3g of sodium dodecyl sulfate and stir for 5h to obtain an oxidized starch-gelatin composite gel solution; cool to 30°C and gel for 3h, immerse the dipping mold in the oxidized starch-gelatin composite gel solution for 10s at 40°C, and vacuum dry for 2h to obtain an inner capsule shell; coat the chitosan-hydroxypropyl methyl cellulose onto the surface of the inner shell to form an outer capsule shell; vacuum dry at 40°C for 2h to obtain a composite capsule shell; in the composite capsule shell, the average thickness of the inner shell is 300μm, and the average thickness of the outer shell is 80μm; Step 2: At 90°C, mix 45kg of deionized water, 23kg of tea saponin, 8kg of dodecylbenzenesulfonic acid, and 10kg of vanillin and stir for 30min; cool to 80°C, add 5kg of guar gum and 0.5kg of glycerol and stir for 10min; cool to 65°C, add 7kg of essential oil and 13kg of zeolite silver antibacterial agent and stir for 10min; cool to 35°C, add sodium hydroxide to adjust the pH value to 9 to obtain a mixture, and granulate the mixture to obtain a tea saponin-containing antibacterial detergent powder; Step 3: Encapsulate the tea saponin-containing antibacterial detergent powder in the composite capsule shell to obtain a tea saponin-containing antibacterial detergent, wherein the content of each component in the tea saponin-containing antibacterial detergent is 5% by weight of the composite capsule shell and 95% by weight of the tea saponin-containing antibacterial detergent powder.

[0029] Experiment: Test the performance of the products prepared in Examples 1-3 and Comparative Examples 1-3, and the experimental results are shown in Table 1.

[0030] Foam performance test: 0.5wt.% of the detergent was added to water with a total weight of water, the water hardness was 450mg / L, the water temperature was 40℃, stirring for 1min, then stopping stirring, and timing from the start of stopping stirring, recording the foam height at 0min, 5min and 10min to determine the foaming capacity and foam stability of the sample. The test results are shown in Table 1. Detergency performance test: The washing of carbon black stained cloth, protein stained cloth and sebum stained cloth was tested according to the test standard GB / T13174-2021. The amount of detergent used was 0.5wt.% of the total weight of water, the water hardness was 450mg / L, and the water temperature was 40℃. The test results are shown in Table 2. Comparative Example 4: The tea saponin-containing antibacterial detergent powder does not contain vanillin and zeolite silver antibacterial agent, and the other parameters are the same as those in Example 3.

[0031] Comparative Example 5: The tea saponin-containing antibacterial detergent powder does not contain zeolite silver antibacterial agent, and the other parameters are the same as those in Example 3.

[0032] Antibacterial performance test: cotton cloth was cut into a square of 50x50cm, and then soaked in hard water containing the detergent in Example 3 and Comparative Examples 4 and 5 for 15min, the amount of detergent used was 0.5wt.% of the total weight of water, the water hardness was 450mg / L, and the water temperature was 40℃. After washing, the water absorbed by the cotton cloth was squeezed out and the cotton cloth sample was naturally dried. The untreated cotton cloth was used as a blank control group, and the antibacterial performance test was carried out according to the standard GB / T20944.3-2008, the test bacteria were Escherichia coli, Staphylococcus aureus and Candida albicans, and the experimental results are shown in Table 3. Conclusion: The experimental data in Tables 1-2 show that the tea saponin-containing antibacterial detergent prepared in Examples 1-3 has good performance, and still has good foam performance in water with high hardness, and strong detergency. The data of Example 3 and Comparative Examples 4 and 5 show that the detergent prepared by mixing tea saponin, vanillin and zeolite silver antibacterial agent can effectively improve the antibacterial ability of clothes, which is beneficial to maintaining good personal hygiene.

[0033] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalent ones. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for preparing a tea saponin-containing antibacterial detergent, characterized by: The method comprises the following steps: Step 1: stirring deionized water, tea saponin, dodecyl benzene sulfonic acid and vanillin at 80-90 DEG C for 10-30 min; cooling to 70-80 DEG C, adding guar gum and glycerol and stirring for 5-10 min; cooling to 60-65 DEG C, adding fragrance essential oil and zeolite loaded silver antibacterial agent and stirring for 5-10 min; cooling to 25-35 DEG C, adding sodium hydroxide to adjust the pH value to 8-9 to obtain a mixture, and granulating the mixture to obtain tea saponin-containing antibacterial detergent powder; Step 2: packaging the tea saponin-containing antibacterial detergent powder in a composite capsule shell to obtain the tea saponin-containing antibacterial detergent.

2. The method for preparing a tea saponin-containing antibacterial detergent according to claim 1, characterized in that: In step 1, the amount of each component is 30-45 parts by weight of deionized water, 15-23 parts of tea saponin, 5-8 parts of dodecyl benzene sulfonic acid, 6-10 parts of vanillin, 4-5 parts of guar gum, 0.3-0.5 parts of glycerol, 5-7 parts of fragrance essential oil, and 7-13 parts of zeolite loaded silver antibacterial agent.

3. The preparation method of the tea saponin-containing antibacterial detergent according to claim 1, wherein the preparation method comprises the following steps in step 2: the content of each component in the tea saponin-containing antibacterial detergent is 3-5% by weight of the composite capsule shell and 95-97% by weight of the tea saponin-containing antibacterial detergent powder.

4. The method for preparing a tea saponin-containing antibacterial detergent according to claim 1, characterized in that: In step 2, the preparation method of the composite capsule shell comprises the following steps: S1: dispersing ethylenediaminetetraacetic acid in anhydrous methanol to obtain an ethylenediaminetetraacetic acid dispersion, dissolving chitosan in an acetic acid aqueous solution to obtain a chitosan solution, adding the ethylenediaminetetraacetic acid dispersion to the chitosan solution, stirring and reacting at 25-35 DEG C for 24 h, and then washing, drying, and crushing to obtain modified chitosan powder; S2: adding hydroxypropyl methyl cellulose to deionized water and stirring for 5-10 h, adding glycerol and continuing to stir for 10-15 min, and then adding the modified chitosan powder and ultrasonic dispersing to obtain a chitosan-hydroxypropyl methyl cellulose mixed solution; S3: dispersing oxidized starch and gelatin in deionized water, adding polyethylene glycol 600 and glycerol, stirring at 70-80 DEG C for 10-30 min, adding sodium dodecyl sulfate and stirring for 3-5 h to obtain an oxidized starch-gelatin composite gel solution, cooling to 25-30 DEG C and aging for 2-3 h, immersing a dipping mold in the oxidized starch-gelatin composite gel solution for 8-10 s, and vacuum drying at 35-40 DEG C for 1-2 h to obtain an inner capsule shell, coating the chitosan-hydroxypropyl methyl cellulose on the surface of the inner shell to form an outer capsule shell, and vacuum drying at 35-40 DEG C for 1-2 h to obtain the composite capsule shell.

5. The method for preparing a tea saponin-containing antibacterial detergent according to claim 4, characterized in that: In S1, the ethylenediaminetetraacetic acid and the chitosan are reacted at a weight ratio of 3.5-4:

1.

6. The method for preparing a tea saponin-containing antibacterial detergent according to claim 4, characterized in that: Further, in S1, the particle size of the modified chitosan powder is 10-30 μm.

7. The method for preparing a tea saponin-containing antibacterial detergent according to claim 4, characterized in that: In S2, the content of each component in the chitosan-hydroxypropyl methyl cellulose mixed solution is 4-5 parts by weight of hydroxypropyl methyl cellulose, 100 parts by weight of deionized water, 0.8-1.2 parts by weight of glycerol, and 1-2 parts by weight of modified chitosan powder.

8. The method for preparing a tea saponin-containing antibacterial detergent according to claim 4, characterized in that: In S3, the content of each component in the oxidized starch-gelatin composite gel solution is 8-15 parts of oxidized starch, 8-15 parts of gelatin, 100 parts of deionized water, 3-3.4 parts of polyethylene glycol 600, 2-3 parts of glycerol, and 1-1.3 parts of sodium dodecyl sulfate.

9. The method for preparing a tea saponin-containing antibacterial detergent according to claim 4, characterized in that: In S3, the average thickness of the inner shell of the composite capsule shell is 200-300 μm, and the average thickness of the outer shell is 60-80 μm.

10. A tea saponin-containing antibacterial detergent prepared by the preparation method according to any one of claims 1-9.

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