Photocatalyst degerming and disinfecting laundry detergent and preparation method thereof

Abstract

The invention relates to the technical field of laundry detergents, in particular to a photocatalyst degerming and disinfecting laundry detergent and a preparation method thereof. The problems that a laundry detergent is poor in cleaning effect and easy to damage clothes are solved. According to the invention, the decontamination capability of the laundry detergent is improved by changing the dosage of the photocatalyst nano titanium dioxide and the stirring temperature and time; the whiteness maintenance of the laundry detergent on clothes is improved by changing the dosage of the first anionic surfactant and the variety and dosage of the nonionic surfactant; the softness of the laundry detergent to clothes is improved by changing the reaction temperature and time and improving the dosage of the chelating agent and the part ratio of the mixture in the chelating agent; the bactericidal ability of the laundry detergent is improved by changing the dosage of the parachlorometaxylenol, the soapberry extracting solution and the improved degerming agent; the rinse foam height of the laundry detergent is reduced by varying the amount of the second anionic surfactant and the fraction ratio of the mixture therein.

Description

Technical Field

[0001] The invention relates to the technical field of laundry detergents, in particular to a photocatalyst sterilizing and disinfecting laundry detergent and a preparation method thereof. Background Art

[0002] As early as 1907, Henkel invented laundry detergent, which gradually became popular and widely used. However, as its use continued, its shortcomings became increasingly apparent. Laundry detergents often contained large amounts of sodium sulfate, a filler with no cleaning effect, resulting in significant waste of resources and energy. This also created dust pollution during production, which was detrimental to the environment. Furthermore, some laundry detergents contained phosphorus, which can cause serious environmental pollution. This led to the emergence of liquid laundry detergents. Liquid laundry detergents are neutral detergents that use water instead of sodium sulfate and surfactants as their primary ingredient, significantly reducing the environmental impact of liquid laundry detergents. However, most liquid laundry detergents produce excessive foam, make rinsing difficult, and are time-consuming and water-consuming. This not only wastes water resources and increases laundry costs, but also compromises energy conservation, emission reduction, and environmental sustainability.

[0003] Photocatalytic nano-titanium dioxide is a photo-semiconductor material with photocatalytic properties. By adding it, laundry detergent can be made more effective at killing bacteria. Through photocatalytic action, nano-titanium dioxide produces reactive oxygen species that effectively destroy microorganisms such as bacteria, viruses, and fungi, and break down stubborn stains, thereby enhancing the cleaning effect.

[0004] Chinese patent CN114686322A discloses a laundry detergent with a softening function and its preparation method. The laundry detergent provided by the invention includes an anionic surfactant, a cationic surfactant, a nonionic surfactant, an amphoteric surfactant, a protective agent, an auxiliary agent, and water. The cationic surfactant can enter the internal pores of the protective agent and protect the cationic surfactant through the protective agent; the amphoteric surfactant can further protect the cationic surfactant as a buffer layer to prevent the cationic surfactant from excessively reacting with the anionic surfactant, allowing the cationic surfactant to fully exert its softening effect; the linear alkylbenzene sulfonic acid in the anionic surfactant and the sodium silicate and / or sodium metasilicate in the auxiliary agent can react to form silica gel, making the system more stable. The laundry detergent provided by this invention not only has strong detergency, but also has a significant softening effect and good stability. However, the addition of the anionic surfactant has a good foaming effect, which can cause excessive foaming and difficulty in rinsing, wasting water resources and time. Repeated rinsing can also cause damage to clothes. In hard water, the anionic surfactant may combine with calcium and magnesium ions to form precipitates, thereby reducing the cleaning effect.

[0005] Chinese patent CN117720969B discloses a laundry detergent for washing sportswear and its preparation method. The detergent primarily comprises the following ingredients: lauroylamine oxide, cocoyl methyl monoethanolamide, modified sodium ethoxylate sulfonate, plant extracts, β-cyclodextrin, and polyquaternium-16. The invention utilizes lauroylamine oxide to provide robust foaming and detergency; cocoyl methyl monoethanolamide stabilizes foam and enhances the detergency of the product with lauroylamine oxide; and modified sodium ethoxylate sulfonate effectively prevents gel formation, enhancing detergency. Furthermore, extracts of Anemarrhena asphodeloides, Salix Alba (Willow) Leaf, and Stemona japonica Radix are added to the detergent. These extracts synergistically disrupt bacterial structure, inhibit growth and reproduction, and kill bacteria, resulting in a laundry detergent with outstanding antibacterial properties. The addition of β-cyclodextrin and polyquaternium-16 imparts excellent deodorizing properties. However, the addition of cocoyl methyl monoethanolamide will cause excessive foam when washing clothes, making it difficult to rinse the clothes clean. Repeated rinsing can easily cause damage to the clothes and waste water resources.

[0006] Chinese patent CN107129882B discloses a transparent laundry detergent composition with washing and softening effects and a preparation method thereof. The laundry detergent composition comprises 1-15 parts by weight of an ester quaternary ammonium salt, 5-40 parts by weight of a nonionic surfactant, and 0.1-5 parts by weight of a colloidal stabilizer. The ester quaternary ammonium salt comprises an unsaturated fatty chain ester quaternary ammonium salt, and the weight percentage of the unsaturated fatty chain ester quaternary ammonium salt in the total amount of the ester quaternary ammonium salt is ≥50%. The method comprises: adding the ester quaternary ammonium salt and the colloidal stabilizer to water while stirring, with the temperature controlled at 55-65°C; cooling the water to 40-50°C, adding the nonionic surfactant, and stirring; cooling the water to 30-40°C, adding one or more of a zwitterionic surfactant, a chelating agent, a brightener, an anti-dye transfer agent, an enzyme-containing stabilizer, a preservative, a pigment, and a fragrance, and stirring. The laundry detergent composition of the invention has the effects of washing, softening, and protection, has good high and low temperature stability, and is more beautiful. However, the cost of using ester-based quaternary ammonium salts is high, and their cleaning ability is weak, and they are not effective in cleaning heavy stains; they also have poor biodegradability and are prone to environmental pollution.

[0007] Laundry detergent is now widely used in our daily lives and is an essential item in every household. However, current laundry detergents still have shortcomings such as weak cleaning ability, poor sterilization performance, and difficulty rinsing. These lead to poor cleaning effects and easy damage to clothing, limiting their use in daily life.

[0008] Therefore, a photocatalyst sterilization and disinfection laundry detergent and a preparation method thereof are proposed. Summary of the Invention

[0009] The present invention aims to design a photocatalytic sterilizing and disinfecting laundry detergent and its preparation method. This invention overcomes the problems of poor cleaning effectiveness and clothing damage caused by conventional laundry detergents. The synthetic raw materials for the photocatalytic sterilizing and disinfecting laundry detergent include photocatalytic nano-titanium dioxide, a first anionic surfactant, a nonionic surfactant, an improved chelating agent, an improved sterilizing agent, a second anionic surfactant, an odor neutralizer, hydroxypropyl methylcellulose, amylase, protease, lavender essential oil, tea tree essential oil, and deionized water. The present invention improves the decontamination ability of the photocatalyst sterilizing and disinfecting laundry liquid by changing the dosage of photocatalyst nano-titanium dioxide and the stirring temperature and time; improves the whiteness maintenance of clothes by the photocatalyst sterilizing and disinfecting laundry liquid by changing the dosage of a first anionic surfactant and the type and dosage of a nonionic surfactant; improves the softness of clothes by the photocatalyst sterilizing and disinfecting laundry liquid by changing the reaction temperature and time, the dosage of an improved chelating agent and the ratio of acrylic acid maleic acid copolymer to ethylenediaminetetraacetic acid; improves the bactericidal ability of the photocatalyst sterilizing and disinfecting laundry liquid by changing the dosage of parachlorometaxylenol, soapberry extract and the improved sterilizing agent; and reduces the rinsing foam height of the photocatalyst sterilizing and disinfecting laundry liquid by changing the dosage of a second anionic surfactant and the ratio of sodium cocoyl glycinate to potassium oleate.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] In one aspect, the present invention provides a method for preparing a photocatalytic sterilizing and disinfecting laundry detergent, the method comprising the following steps:

[0012] S1: Add the first portion of deionized water, photocatalyst nano-titanium dioxide, the first anionic surfactant, and the nonionic surfactant into a beaker, and stir at 40°C to 80°C for 2h to 5h to obtain a mixture A;

[0013] S2: adding the improved chelating agent, the improved bactericide, the second anionic surfactant, and the odor neutralizer to the mixture A and stirring for 1 hour to obtain a mixture B;

[0014] S3: transferring the mixture B to a reactor and maintaining it at 40°C to 50°C for 3h to 6h to obtain a mixture C;

[0015] S4: adding the remaining deionized water, hydroxypropyl methylcellulose, amylase, protease, lavender essential oil, and tea tree essential oil to a beaker, and stirring at room temperature for 2 h to obtain a mixture D;

[0016] S5: mixing and stirring the mixture C and the mixture D, and adding sodium hydroxide to adjust the pH value to 8 after stirring evenly, to finally obtain the photocatalyst sterilization and disinfection laundry detergent;

[0017] The raw materials for producing the photocatalyst sterilization and disinfection laundry detergent include, in parts: 0.5-1 parts of the photocatalyst nano-titanium dioxide; 5-10 parts of the first anionic surfactant; 2-6 parts of the nonionic surfactant; 0.3-0.7 parts of the improved chelating agent; 0.1-0.5 parts of the improved sterilizer; 3-7 parts of the second anionic surfactant; 0.5 parts of the odor neutralizer; 0.5 parts of hydroxypropyl methylcellulose; 0.1 parts of amylase; 0.1 parts of protease; 0.1 parts of lavender essential oil; 0.1 parts of tea tree essential oil; and 30 parts of deionized water.

[0018] Preferably, the amount of the first portion of deionized water in S1 is 60% of the total amount of deionized water.

[0019] Preferably, the remaining amount of deionized water in S4 is 40% of the total amount of deionized water.

[0020] Preferably, the first anionic surfactant is a mixture of sodium fatty alcohol polyoxyethylene ether sulfate and sodium lauryl sulfate; wherein the ratio of the sodium fatty alcohol polyoxyethylene ether sulfate to the sodium lauryl sulfate is 1:1.

[0021] Preferably, the nonionic surfactant is one of fatty alcohol polyoxyethylene ether and alkyl glycoside.

[0022] Preferably, the improved chelating agent is a mixture of acrylic acid maleic acid copolymer and ethylenediaminetetraacetic acid; wherein the ratio of the acrylic acid maleic acid copolymer to the ethylenediaminetetraacetic acid is 1:1.2-1.6.

[0023] Preferably, the preparation method of the improved disinfectant is: add 4-8 parts of para-chloro-metaxylenol, 5 parts of alkylphenol polyoxyethylene ether, and 8-12 parts of soapberry extract to 20 parts of deionized water, and mix them evenly to obtain the improved disinfectant.

[0024] Preferably, the second anionic surfactant is a mixture of sodium cocoyl glycinate and potassium oleate; wherein the ratio of the sodium cocoyl glycinate to the potassium oleate is 1:0.8-1.2.

[0025] Preferably, the odor neutralizer is soybean ethyl sulfate morpholine.

[0026] Another aspect of the present invention provides a photocatalyst sterilizing and disinfecting laundry liquid, wherein the synthetic raw materials of the photocatalyst sterilizing and disinfecting laundry liquid include photocatalyst nano titanium dioxide, a first anionic surfactant, a nonionic surfactant, an improved chelating agent, an improved sterilizing agent, a second anionic surfactant, an odor neutralizer, hydroxypropyl methylcellulose, amylase, protease, lavender essential oil, tea tree essential oil and deionized water; the photocatalyst sterilizing and disinfecting laundry liquid is prepared by any one of the preparation methods described above; the photocatalyst sterilizing and disinfecting laundry liquid has a cleaning effect on carbon black stained cloth The ratio is 1.38, the decontamination ratio for protein-stained cloth is 1.61, and the decontamination ratio for sebum-stained cloth is 1.83; the whiteness retention rate of the photocatalyst sterilization and disinfection laundry liquid for clothes is 97.5%; the hand feel of the clothes after the photocatalyst sterilization and disinfection laundry liquid is 9.1 points after the clothes are washed in a cycle; the bactericidal rate of the photocatalyst sterilization and disinfection laundry liquid for Escherichia coli is 99.9%, the bactericidal rate for Staphylococcus aureus is 99.9%, and the bactericidal rate for Candida albicans is 99.9%; the foam height of the photocatalyst sterilization and disinfection laundry liquid after 4 rinses is 0 mm.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention improves the decontamination ability of the photocatalyst sterilization and disinfection laundry detergent by changing the dosage of photocatalyst nano-titanium dioxide and the stirring temperature and time. The photocatalyst nano-titanium dioxide can generate active oxygen through photocatalysis, which can effectively destroy microorganisms such as bacteria, viruses and fungi, and break down stubborn stains. The appropriate temperature and time can make the photocatalyst nano-titanium dioxide dissolve more fully, thereby improving the cleaning effect. The decontamination ratio for carbon black stained cloth is 1.38, the decontamination ratio for protein stained cloth is 1.61, and the decontamination ratio for sebum stained cloth is 1.83.

[0029] 2. The present invention improves the whiteness maintenance of clothes by the photocatalyst sterilization and disinfection laundry detergent by changing the dosage of the first anionic surfactant and the type and dosage of the nonionic surfactant. When fatty alcohol polyoxyethylene ether sodium sulfate and sodium lauryl sulfate are added, the polyether structure in the fatty alcohol polyoxyethylene ether sodium sulfate can react with calcium, magnesium and other ions in hard water, thereby promoting the stability of sodium lauryl sulfate in hard water, as well as the penetration and wetting of the surface of clothes, so that the stains and the surface of clothes are separated; and the combination of anionic surfactants and nonionic surfactants can improve the whiteness retention rate of clothes, thereby improving the cleaning effect of the laundry detergent. The whiteness retention rate of clothes is 97.5%.

[0030] 3. The present invention improves the softness of the photocatalyst sterilization and disinfection laundry detergent for clothes by changing the reaction temperature and time, improving the amount of the chelating agent, and the ratio of the acrylic acid maleic acid copolymer and the ethylenediaminetetraacetic acid. When the acrylic acid maleic acid copolymer and the ethylenediaminetetraacetic acid are added, the functional groups in the acrylic acid maleic acid copolymer react with the hydroxyl groups, carboxyl groups, etc. in the clothing fibers to form a strongly adsorbed coacervate structure, reducing the penetration of anionic surfactants and nonionic surfactants into the interior of the clothing, improving the softness of the clothing, and reducing damage to the clothing; maintaining the appropriate temperature and time for the reaction facilitates chelation between the raw materials, improving the performance of the laundry detergent, and the feel of the clothes after cyclic washing is 9.1 points.

[0031] 4. The present invention improves the bactericidal ability of the photocatalyst sterilizing and disinfecting laundry detergent by changing the dosage of chlorometaxylenol, soapberry extract and improved bactericidal agent. Combining chlorometaxylenol with the natural bactericidal agent soapberry extract enhances the sterilization effect and improves the cleaning effect of the laundry detergent. The bactericidal rate against Escherichia coli is 99.9%, the bactericidal rate against Staphylococcus aureus is 99.9%, and the bactericidal rate against Candida albicans is 99.9%.

[0032] 5. The present invention reduces the rinsing foam height of the photocatalyst sterilizing and disinfecting laundry detergent by changing the dosage of the second anionic surfactant and the ratio of sodium cocoyl glycinate and potassium oleate. When sodium cocoyl glycinate and potassium oleate are added, sodium cocoyl glycinate foams abundantly and generates a large amount of foam when washing clothes, while potassium oleate has a fast defoaming speed and can quickly burst the foam during rinsing, thereby solving the problem of easy residue of laundry detergent and difficulty in rinsing. The number of rinsing times is reduced, which reduces damage to clothes. The foam height after 4 rinsings is 0 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a graph of whiteness retention rates for Example 11, Examples 15-24, and Comparative Example 2. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Specific reference Figure 1 The present invention provides a method for preparing a photocatalyst sterilization and disinfection laundry detergent, and the technical solution is as follows:

[0036] Example 1

[0037] Preparation method of improved disinfectant:

[0038] 4 parts of p-chloro-metaxylenol, 5 parts of alkylphenol polyoxyethylene ether and 8 parts of soapberry extract were added to 20 parts of deionized water, and the mixture was evenly mixed to obtain the improved disinfectant.

[0039] Preparation method of photocatalyst sterilization and disinfection laundry detergent:

[0040] S1: Add 18 parts of the first deionized water, 0.5 parts of photocatalyst nano-titanium dioxide, 5 parts of a mixture of sodium fatty alcohol polyoxyethylene ether sulfate and sodium lauryl sulfate in a ratio of 1:1, and 2 parts of fatty alcohol polyoxyethylene ether into a beaker, and stir at 40°C for 2 hours to obtain a mixture A;

[0041] S2: Add 0.3 parts of a mixture of acrylic acid maleic acid copolymer and ethylenediaminetetraacetic acid in a ratio of 1:1.2, 0.1 parts of an improved fungicide, 3 parts of a mixture of sodium cocoyl glycinate and potassium oleate in a ratio of 1:0.8, and 0.5 parts of soybean ethyl sulfate morpholine to the mixture A, and stir for 1 hour to obtain a mixture B;

[0042] S3: transferring the mixture B to a reactor and maintaining it at 40° C. for 3 h to obtain a mixture C;

[0043] S4: Add the remaining 12 parts of deionized water, 0.5 parts of hydroxypropyl methylcellulose, 0.1 parts of amylase, 0.1 parts of protease, 0.1 parts of lavender essential oil, and 0.1 parts of tea tree essential oil to a beaker, and stir at room temperature for 2 hours to obtain a mixture D;

[0044] S5: Mixing and stirring the mixture C and the mixture D. After stirring evenly, adding sodium hydroxide to adjust the pH value to 8, and finally obtaining the photocatalyst sterilization and disinfection laundry detergent.

[0045] Example 2-13

[0046] Refer to the preparation method and parameter conditions of Example 1, the specific differences are shown in Table 1.

[0047] Table 1 Parameter conditions of Examples 1-13

[0048]

[0049] Comparative Example 1

[0050] The improved disinfectant was prepared according to the method of Example 1 above.

[0051] Preparation method of sterilization and disinfection laundry detergent:

[0052] S1: Add 18 parts of the first deionized water, 5 parts of a mixture of sodium fatty alcohol polyoxyethylene ether sulfate and sodium lauryl sulfate in a ratio of 1:1, and 2 parts of fatty alcohol polyoxyethylene ether to a beaker, and stir at 60° C. for 3 hours to obtain a mixture A;

[0053] S2: Add 0.3 parts of a mixture of acrylic acid maleic acid copolymer and ethylenediaminetetraacetic acid in a ratio of 1:1.2, 0.1 parts of an improved fungicide, 3 parts of a mixture of sodium cocoyl glycinate and potassium oleate in a ratio of 1:0.8, and 0.5 parts of soybean ethyl sulfate morpholine to the mixture A, and stir for 1 hour to obtain a mixture B;

[0054] S3: transferring the mixture B to a reactor and maintaining it at 40° C. for 3 h to obtain a mixture C;

[0055] S4: Add the remaining 12 parts of deionized water, 0.5 parts of hydroxypropyl methylcellulose, 0.1 parts of amylase, 0.1 parts of protease, 0.1 parts of lavender essential oil, and 0.1 parts of tea tree essential oil to a beaker, and stir at room temperature for 2 hours to obtain a mixture D;

[0056] S5: Mix the mixture C and the mixture D and stir them. After stirring evenly, add sodium hydroxide to adjust the pH value to 8, and finally obtain the sterilization and disinfection laundry detergent.

[0057] The difference from the embodiment is that the photocatalyst nano titanium dioxide is not added.

[0058] Example 14 Decontamination Ability Test

[0059] The tests were conducted according to the method specified in GB / T 13174-2008, including the carbon black stain removal ratio, protein stain removal ratio, and sebum stain removal ratio. The results of the stain removal ability test are shown in Table 2.

[0060] Table 2 Decontamination ability test of Examples 1-13 and Comparative Example 1

[0061]

[0062] By adding photocatalyst nano titanium dioxide and changing the amount of photocatalyst nano titanium dioxide and the time and temperature of stirring to improve the decontamination ability of the photocatalyst sterilizing and disinfecting laundry liquid, photocatalyst nano titanium dioxide can produce active oxygen through photocatalysis, which can effectively destroy microorganisms such as bacteria, viruses and fungi, and disintegrate stubborn stains. Suitable temperature and time can make the photocatalyst nano titanium dioxide dissolve more fully, thereby improving the cleaning effect. As shown in Table 2, in Examples 1-13 and Comparative Example 1, Comparative Example 1 does not add photocatalyst nano titanium dioxide. Although the final decontamination ability is higher than that of standard laundry liquid, compared with the examples, the decontamination ability is the worst. The carbon black stain removal ratio is only 1.11, the protein stain removal ratio is only 1.19, and the sebum stain removal ratio is only 1.28. At this time, the decontamination ability of the sterilizing and disinfecting laundry liquid without adding photocatalyst nano titanium dioxide is poor, and it is difficult to clean stubborn dirt, and the cleaning effect is poor. After adding photocatalyst nano-titanium dioxide, the decontamination ability increased significantly. When the amount of photocatalyst nano-titanium dioxide was changed and the stirring temperature and time remained unchanged, the decontamination ability first increased and then decreased. When the amount of photocatalyst nano-titanium dioxide was 0.8 parts, the decontamination ability was the best. The decontamination ratio of the carbon black stain cloth of Example 4 was 1.32, the decontamination ratio of the protein stain cloth was 1.56, and the decontamination ratio of the sebum stain cloth was 1.76. When the amount of photocatalyst nano-titanium dioxide was fixed at 0.8 parts, the stirring temperature was changed, and the stirring time was unchanged, the decontamination ability was the best at 60°C. At this time, the decontamination ratio of the carbon black stain cloth of Example 8 was 1.35, the decontamination ratio of the protein stain cloth was 1.59, and the decontamination ratio of the sebum stain cloth was 1. 79, indicating that the appropriate temperature can promote the dissolution of photocatalyst nano-titanium dioxide, thereby enhancing the decontamination ability; when the amount of photocatalyst nano-titanium dioxide is fixed at 0.8 parts, the stirring temperature is 60 ° C, and only the stirring time is changed, the decontamination ability first increases and then decreases. When the stirring time is 3 hours, the decontamination ability is the best. The carbon black stain cloth decontamination ratio of Example 11 is 1.38, the protein stain cloth decontamination ratio is 1.61, and the sebum stain cloth decontamination ratio is 1.83, indicating that the appropriate time can promote the dissolution of photocatalyst nano-titanium dioxide, so that it can maximize its effect in the laundry detergent. At this time, the photocatalyst nano-titanium dioxide sterilization and disinfection laundry detergent has the strongest decontamination ability, can clean stubborn stains, and has a good cleaning effect.

[0063] Example 15

[0064] The improved disinfectant was prepared according to the method of Example 1 above.

[0065] Preparation method of photocatalyst sterilization and disinfection laundry detergent:

[0066] S1: Add 18 parts of the first deionized water, 0.8 parts of photocatalyst nano-titanium dioxide, 5 parts of a mixture of sodium fatty alcohol polyoxyethylene ether sulfate and sodium lauryl sulfate in a ratio of 1:1, and 2 parts of alkyl glycoside into a beaker, and stir at 60° C. for 3 hours to obtain a mixture A;

[0067] S2: Add 0.3 parts of a mixture of acrylic acid maleic acid copolymer and ethylenediaminetetraacetic acid in a ratio of 1:1.2, 0.1 parts of an improved fungicide, 3 parts of a mixture of sodium cocoyl glycinate and potassium oleate in a ratio of 1:0.8, and 0.5 parts of soybean ethyl sulfate morpholine to the mixture A, and stir for 1 hour to obtain a mixture B;

[0068] S3: transferring the mixture B to a reactor and maintaining it at 40° C. for 3 h to obtain a mixture C;

[0069] S4: Add the remaining 12 parts of deionized water, 0.5 parts of hydroxypropyl methylcellulose, 0.1 parts of amylase, 0.1 parts of protease, 0.1 parts of lavender essential oil, and 0.1 parts of tea tree essential oil to a beaker, and stir at room temperature for 2 hours to obtain a mixture D;

[0070] S5: Mixing and stirring the mixture C and the mixture D. After stirring evenly, adding sodium hydroxide to adjust the pH value to 8, and finally obtaining the photocatalyst sterilization and disinfection laundry detergent.

[0071] Examples 16-24

[0072] Referring to the preparation method and parameter conditions of Example 15, the specific differences are shown in Table 3.

[0073] Table 3 Parameters and conditions of Example 11 and Examples 15-24

[0074]

[0075]

[0076] Comparative Example 2

[0077] The improved disinfectant was prepared according to the method of Example 1 above.

[0078] Preparation method of photocatalyst sterilization and disinfection laundry detergent:

[0079] S1: Add 18 parts of the first deionized water and 0.8 parts of photocatalyst nano-titanium dioxide into a beaker, and stir at 60°C for 3 hours to obtain a mixture A;

[0080] S2: Add 0.3 parts of a mixture of acrylic acid maleic acid copolymer and ethylenediaminetetraacetic acid in a ratio of 1:1.2, 0.1 parts of an improved fungicide, 3 parts of a mixture of sodium cocoyl glycinate and potassium oleate in a ratio of 1:0.8, and 0.5 parts of soybean ethyl sulfate morpholine to the mixture A, and stir for 1 hour to obtain a mixture B;

[0081] S3: transferring the mixture B to a reactor and maintaining it at 40° C. for 3 h to obtain a mixture C;

[0082] S4: Add the remaining 12 parts of deionized water, 0.5 parts of hydroxypropyl methylcellulose, 0.1 parts of amylase, 0.1 parts of protease, 0.1 parts of lavender essential oil, and 0.1 parts of tea tree essential oil to a beaker, and stir at room temperature for 2 hours to obtain a mixture D;

[0083] S5: Mixing and stirring the mixture C and the mixture D. After stirring evenly, adding sodium hydroxide to adjust the pH value to 8, and finally obtaining the photocatalyst sterilization and disinfection laundry detergent.

[0084] The difference from Example 1 is that the first portion of anionic surfactant and nonionic surfactant is not added.

[0085] Example 25 Whiteness Retention Test

[0086] The test was carried out according to the method specified in GB / T 13174-2008. The results are as follows: Figure 1 and as shown in Table 4.

[0087] Table 4 Whiteness retention test of Example 11, Examples 15-24, and Comparative Example 2

[0088]

[0089]

[0090] Depend on Figure 1As can be seen from Table 4, in Example 11, Examples 15-24, and Comparative Example 2, the whiteness retention rate of Comparative Example 2 is the lowest, which is only 85.1%, indicating that the decontamination ability of clothes is relatively weak. When the first anionic surfactant and nonionic surfactant are added, the whiteness retention rate of clothes is significantly increased. When the amount of the first anionic surfactant and the nonionic surfactant remains unchanged, and only the type of nonionic surfactant is changed, alkyl polyglycoside can better improve the whiteness retention rate of clothes. The whiteness retention rate of Example 15 is 93.6%; when the amount of alkyl polyglycoside is fixed and only the amount of the first anionic surfactant is changed, the whiteness retention rate of clothes first increases and then decreases. When the amount is 7, the whiteness retention rate of Example 17 is the highest, which is 95.3%; when the amount of the first anionic surfactant is fixed at 7 parts and only the amount of alkyl polyglycoside is changed, the whiteness retention rate of clothes is 93.6%. The whiteness retention of the article first increases and then decreases. When the dosage is 4 parts, the whiteness retention rate of Example 22 is the highest, reaching 97.5%. At this time, the polyether structure in the sodium fatty alcohol polyoxyethylene ether sulfate can react with calcium, magnesium and other ions in hard water, thereby promoting the stability of sodium lauryl sulfate in hard water and the penetration and wetting of the surface of clothes, so that the stains and the surface of clothes are separated; and the combination of anionic surfactants and nonionic surfactants can improve the whiteness retention rate of clothes, thereby improving the cleaning effect of the laundry detergent, making the clothes more beautiful, and extending the service life of the clothes.

[0091] Example 26

[0092] The improved disinfectant was prepared according to the method of Example 1 above.

[0093] Preparation method of photocatalyst sterilization and disinfection laundry detergent:

[0094] S1: Add 18 parts of the first deionized water, 0.8 parts of photocatalyst nano-titanium dioxide, 7 parts of a mixture of sodium fatty alcohol polyoxyethylene ether sulfate and sodium lauryl sulfate in a ratio of 1:1, and 4 parts of alkyl glycoside to a beaker, and stir at 60° C. for 3 hours to obtain a mixture A;

[0095] S2: Add 0.3 parts of a mixture of acrylic acid maleic acid copolymer and ethylenediaminetetraacetic acid in a ratio of 1:1.3, 0.1 parts of an improved fungicide, 3 parts of a mixture of sodium cocoyl glycinate and potassium oleate in a ratio of 1:0.8, and 0.5 parts of soybean ethyl sulfate morpholine to the mixture A, and stir for 1 hour to obtain a mixture B;

[0096] S3: transferring the mixture B to a reactor and maintaining it at 40° C. for 3 h to obtain a mixture C;

[0097] S4: Add the remaining 12 parts of deionized water, 0.5 parts of hydroxypropyl methylcellulose, 0.1 parts of amylase, 0.1 parts of protease, 0.1 parts of lavender essential oil, and 0.1 parts of tea tree essential oil to a beaker, and stir at room temperature for 2 hours to obtain a mixture D;

[0098] S5: Mixing and stirring the mixture C and the mixture D. After stirring evenly, adding sodium hydroxide to adjust the pH value to 8, and finally obtaining the photocatalyst sterilization and disinfection laundry detergent.

[0099] Examples 27-41

[0100] Referring to the preparation method and parameter conditions of Example 26, the specific differences are shown in Table 5.

[0101] Table 5 Parameters and conditions of Example 22 and Examples 26-41

[0102]

[0103] Comparative Example 3

[0104] The improved disinfectant was prepared according to the method of Example 1 above.

[0105] Preparation method of photocatalyst sterilization and disinfection laundry detergent:

[0106] S1: Add 18 parts of the first deionized water, 0.8 parts of photocatalyst nano-titanium dioxide, 7 parts of a mixture of sodium fatty alcohol polyoxyethylene ether sulfate and sodium lauryl sulfate in a ratio of 1:1, and 4 parts of alkyl glycoside to a beaker, and stir at 60° C. for 3 hours to obtain a mixture A;

[0107] S2: Add 0.1 parts of the improved fungicide, 3 parts of a mixture of sodium cocoyl glycinate and potassium oleate in a ratio of 1:0.8, and 0.5 parts of soybean ethyl sulfate morpholine to the mixture A, and stir for 1 hour to obtain a mixture B;

[0108] S3: transferring the mixture B to a reactor and maintaining it at 46° C. for 5 h to obtain a mixture C;

[0109] S4: Add the remaining 12 parts of deionized water, 0.5 parts of hydroxypropyl methylcellulose, 0.1 parts of amylase, 0.1 parts of protease, 0.1 parts of lavender essential oil, and 0.1 parts of tea tree essential oil to a beaker, and stir at room temperature for 2 hours to obtain a mixture D;

[0110] S5: Mixing and stirring the mixture C and the mixture D. After stirring evenly, adding sodium hydroxide to adjust the pH value to 8, and finally obtaining the photocatalyst sterilization and disinfection laundry detergent.

[0111] The difference from the example is that no improved chelating agent is added.

[0112] Example 42: Cyclic Washing Clothes Hand Feel Test

[0113] The test was conducted according to the method specified in GB / T 13174-2008. After 20 consecutive wash cycles, sensory evaluation and scoring were performed (10 points for softest and 1 point for hardest). The average score was calculated. The results are shown in Table 6.

[0114] Table 6 Test on the feel of clothes washed in cycles according to Example 22, Examples 26-41, and Comparative Example 3

[0115] Example Feel of clothes washed in cycles / minute Example 22 7.7 Example 26 7.9 Example 27 8.0 Example 28 7.8 Example 29 7.7 Example 30 8.2 Example 31 8.4 Example 32 8.2 Example 33 8.1 Example 34 8.5 Example 35 8.7 Example 36 8.8 Example 37 8.6 Example 38 8.4 Example 39 8.9 Example 40 9.1 Example 41 8.9 Comparative Example 3 6.9

[0116] Table 6 shows that among Examples 22, 26-41, and Comparative Example 3, the laundry in Comparative Example 3 had the worst hand feel, with an average score of only 6.9. This indicates that the softness of the laundry was at its lowest and that the laundry detergent easily damaged the laundry. When the improved chelating agent was added, the hand feel of the laundry in the laundry cycle was significantly improved. When the ratio of acrylic acid maleic acid copolymer and ethylenediaminetetraacetic acid is changed, the amount of the improved chelating agent and the temperature and time of the reaction remain unchanged, the feel of the circulated washed clothes first increases and then decreases, and is best when the ratio is 1:1.4. The feel of the circulated washed clothes in Example 27 is 8.0 points; when the ratio of acrylic acid maleic acid copolymer and ethylenediaminetetraacetic acid is fixed at 1:1.4, the amount of the improved chelating agent is changed, and the temperature and time of the reaction remain unchanged, the feel of the circulated washed clothes first increases and then decreases, and when the amount of the improved chelating agent is 0.5 parts, the feel of the circulated washed clothes in Example 31 is the best, which is 8.4 points; when the ratio of acrylic acid maleic acid copolymer and ethylenediaminetetraacetic acid is fixed at 1:1.4, the amount of the improved chelating agent is 0.5 parts, the reaction temperature is changed, and the reaction time remains unchanged, the feel of the circulated washed clothes is best when the temperature is 46°C. Good, the hand feel of the cyclic washed clothes in Example 36 is 8.8 points; when the number ratio of acrylic acid maleic acid copolymer and ethylenediaminetetraacetic acid is fixed at 1:1.4, the amount of improved chelating agent is 0.5 parts, the reaction temperature is 46°C, and only the reaction time is changed, the hand feel of the cyclic washed clothes first increases and then decreases. When the reaction time is 5h, the hand feel of the cyclic washed clothes in Example 40 is the best, which is 9.1 points, indicating that the softness of the clothes is the highest at this time. This is because ethylenediaminetetraacetic acid can chelate metal ions, and the functional groups in the acrylic acid maleic acid copolymer will react with the hydroxyl and carboxyl groups in the clothing fibers to form a strongly adsorbed coacervate structure, reducing the penetration of anionic surfactants and nonionic surfactants into the interior of the clothes; and the appropriate reaction temperature and time can promote chelation between the raw materials, improve the softness of the clothes, and reduce the damage to the clothes.

[0117] Example 43

[0118] Preparation method of improved disinfectant:

[0119] 5 parts of p-chloro-metaxylenol, 5 parts of alkylphenol polyoxyethylene ether and 8 parts of soapberry extract were added to 20 parts of deionized water, and the mixture was evenly mixed to obtain the improved disinfectant.

[0120] Preparation method of photocatalyst sterilization and disinfection laundry detergent:

[0121] S1: Add 18 parts of the first deionized water, 0.8 parts of photocatalyst nano-titanium dioxide, 7 parts of a mixture of sodium fatty alcohol polyoxyethylene ether sulfate and sodium lauryl sulfate in a ratio of 1:1, and 4 parts of alkyl glycoside to a beaker, and stir at 60° C. for 3 hours to obtain a mixture A;

[0122] S2: adding 0.5 parts of a mixture of acrylic acid maleic acid copolymer and ethylenediaminetetraacetic acid in a ratio of 1:1.4, 0.1 parts of an improved fungicide, 3 parts of a mixture of sodium cocoyl glycinate and potassium oleate in a ratio of 1:0.8, and 0.5 parts of soybean ethyl sulfate morpholine to the mixture A, and stirring for 1 hour to obtain a mixture B;

[0123] S3: transferring the mixture B to a reactor and maintaining it at 46° C. for 5 h to obtain a mixture C;

[0124] S4: Add the remaining 12 parts of deionized water, 0.5 parts of hydroxypropyl methylcellulose, 0.1 parts of amylase, 0.1 parts of protease, 0.1 parts of lavender essential oil, and 0.1 parts of tea tree essential oil to a beaker, and stir at room temperature for 2 hours to obtain a mixture D;

[0125] S5: Mixing and stirring the mixture C and the mixture D. After stirring evenly, adding sodium hydroxide to adjust the pH value to 8, and finally obtaining the photocatalyst sterilization and disinfection laundry detergent.

[0126] Examples 44-54

[0127] Referring to the preparation method and parameter conditions of Example 43, the specific differences are shown in Table 7.

[0128] Table 7 Parameters and conditions of Example 40, Examples 43-54

[0129]

[0130] Comparative Example 4

[0131] S1: Add 18 parts of the first deionized water, 0.8 parts of photocatalyst nano-titanium dioxide, 7 parts of a mixture of sodium fatty alcohol polyoxyethylene ether sulfate and sodium lauryl sulfate in a ratio of 1:1, and 4 parts of alkyl glycoside to a beaker, and stir at 60° C. for 3 hours to obtain a mixture A;

[0132] S2: adding 0.5 parts of a mixture of acrylic acid maleic acid copolymer and ethylenediaminetetraacetic acid in a ratio of 1:1.4, 3 parts of a mixture of sodium cocoyl glycinate and potassium oleate in a ratio of 1:0.8, and 0.5 parts of soybean ethyl sulfate morpholine to the mixture A, and stirring for 1 hour to obtain a mixture B;

[0133] S3: transferring the mixture B to a reactor and maintaining it at 46° C. for 5 h to obtain a mixture C;

[0134] S4: Add the remaining 12 parts of deionized water, 0.5 parts of hydroxypropyl methylcellulose, 0.1 parts of amylase, 0.1 parts of protease, 0.1 parts of lavender essential oil, and 0.1 parts of tea tree essential oil to a beaker, and stir at room temperature for 2 hours to obtain a mixture D;

[0135] S5: Mixing and stirring the mixture C and the mixture D. After stirring evenly, adding sodium hydroxide to adjust the pH value to 8, and finally obtaining the photocatalyst sterilization and disinfection laundry detergent.

[0136] The difference from the embodiment is that no improved disinfectant is added.

[0137] Example 55 Bactericidal Ability Test

[0138] The test bacteria were Escherichia coli, Staphylococcus aureus, and Candida albicans. The results are shown in Table 8.

[0139] Table 8 Bactericidal ability test of Example 40, Examples 43-54, and Comparative Example 4

[0140] Example Escherichia coli sterilization rate / % Staphylococcus aureus sterilization rate / % Candida albicans sterilization rate / % Example 40 99.1 89.9 89.9 Example 43 99.2 99.1 99.1 Example 44 99.3 99.3 99.2 Example 45 99.3 99.2 99.2 Example 46 99.1 98.9 99.0 Example 47 99.4 99.5 99.3 Example 48 99.6 99.6 99.5 Example 49 99.5 99.4 99.4 Example 50 99.3 99.3 99.3 Example 51 99.8 99.7 99.7 Example 52 99.9 99.9 99.9 Example 53 99.8 99.7 99.7 Example 54 99.5 99.5 99.5 Comparative Example 4 88.4 88.3 88.3

[0141] Adding chlorometaxylenol and soapberry extract to the improved disinfectant can improve the bactericidal ability of the photocatalyst sterilization and disinfection laundry liquid, enhance the sterilization effect, thereby improving the cleaning effect of the laundry liquid. As shown in Table 8, among Example 40, Examples 43-54, and Comparative Example 4, the sterilization effect of Comparative Example 4 is the worst, with a sterilization rate of only 88.4% for Escherichia coli, only 88.3% for Staphylococcus aureus, and only 88.3% for Candida albicans. At this time, the bactericidal ability of the photocatalyst sterilization and disinfection laundry liquid is poor, and the cleaning effect is poor. When the improved disinfectant is added, the bactericidal ability is significantly enhanced. When the amount of parachlorometaxylenol was changed and the amount of soapberry extract and the improved disinfectant remained unchanged, the amount of parachlorometaxylenol was 6 parts, and Example 44 had the strongest bactericidal ability, with a bactericidal rate of 99.3% for Escherichia coli, a bactericidal rate of 99.3% for Staphylococcus aureus, and a bactericidal rate of 99.2% for Candida albicans; when the amount of parachlorometaxylenol was 6 parts, the amount of soapberry extract was changed, and the amount of the improved disinfectant remained unchanged, the amount of soapberry extract was 10 parts, and Example 48 had the strongest bactericidal ability, with a bactericidal rate of 99.6% for Escherichia coli. , the bactericidal rate of Staphylococcus aureus is 99.6%, and the bactericidal rate of Candida albicans is 99.5%; when the dosage of 4-chloro-metaxylenol is 6 parts, the dosage of soapberry extract is 10 parts, and the dosage of the improved bactericidal agent remains unchanged, the bactericidal effect first increases and then decreases. When the dosage of the improved bactericidal agent is 0.3 parts, the bactericidal ability of Example 52 is the strongest, with a bactericidal rate of 99.9% for Escherichia coli, a bactericidal rate of 99.9% for Staphylococcus aureus, and a bactericidal rate of 99.9% for Candida albicans. At this time, the photocatalyst sterilization and disinfection laundry detergent has a strong bactericidal ability and the best cleaning effect.

[0142] Example 56

[0143] The improved disinfectant was prepared according to the method of Example 52 above.

[0144] Preparation method of photocatalyst sterilization and disinfection laundry detergent:

[0145] S1: Add 18 parts of the first deionized water, 0.8 parts of photocatalyst nano-titanium dioxide, 7 parts of a mixture of sodium fatty alcohol polyoxyethylene ether sulfate and sodium lauryl sulfate in a ratio of 1:1, and 4 parts of alkyl glycoside to a beaker, and stir at 60° C. for 3 hours to obtain a mixture A;

[0146] S2: adding 0.5 parts of a mixture of acrylic acid maleic acid copolymer and ethylenediaminetetraacetic acid in a ratio of 1:1.4, 0.3 parts of an improved fungicide, 3 parts of a mixture of sodium cocoyl glycinate and potassium oleate in a ratio of 1:0.9, and 0.5 parts of soybean ethyl sulfate morpholine to the mixture A, and stirring for 1 hour to obtain a mixture B;

[0147] S3: transferring the mixture B to a reactor and maintaining it at 46° C. for 5 h to obtain a mixture C;

[0148] S4: Add the remaining 12 parts of deionized water, 0.5 parts of hydroxypropyl methylcellulose, 0.1 parts of amylase, 0.1 parts of protease, 0.1 parts of lavender essential oil, and 0.1 parts of tea tree essential oil to a beaker, and stir at room temperature for 2 hours to obtain a mixture D;

[0149] S5: Mixing and stirring the mixture C and the mixture D. After stirring evenly, adding sodium hydroxide to adjust the pH value to 8, and finally obtaining the photocatalyst sterilization and disinfection laundry detergent.

[0150] Examples 57-63

[0151] Referring to the preparation method and parameter conditions of Example 56, the specific differences are shown in Table 9.

[0152] Table 9 Parameters and conditions of Example 52, Examples 56-63

[0153]

[0154] Comparative Example 5

[0155] The improved disinfectant was prepared according to the method of Example 52 above.

[0156] Preparation method of photocatalyst sterilization and disinfection laundry detergent:

[0157] S1: Add 18 parts of the first deionized water, 0.8 parts of photocatalyst nano-titanium dioxide, 7 parts of a mixture of sodium fatty alcohol polyoxyethylene ether sulfate and sodium lauryl sulfate in a ratio of 1:1, and 4 parts of alkyl glycoside to a beaker, and stir at 60° C. for 3 hours to obtain a mixture A;

[0158] S2: adding 0.5 parts of a mixture of acrylic acid maleic acid copolymer and ethylenediaminetetraacetic acid in a ratio of 1:1.4, 0.3 parts of an improved fungicide, and 0.5 parts of soybean ethyl sulfate morpholine to the mixture A, and stirring for 1 hour to obtain a mixture B;

[0159] S3: transferring the mixture B to a reactor and maintaining it at 46° C. for 5 h to obtain a mixture C;

[0160] S4: Add the remaining 12 parts of deionized water, 0.5 parts of hydroxypropyl methylcellulose, 0.1 parts of amylase, 0.1 parts of protease, 0.1 parts of lavender essential oil, and 0.1 parts of tea tree essential oil to a beaker, and stir at room temperature for 2 hours to obtain a mixture D;

[0161] S5: Mixing and stirring the mixture C and the mixture D. After stirring evenly, adding sodium hydroxide to adjust the pH value to 8, and finally obtaining the photocatalyst sterilization and disinfection laundry detergent.

[0162] The difference from Example 1 is that no second anionic surfactant is added.

[0163] Example 64 Rinse Foam Height Test

[0164] The foam height was measured using a Ross-Miles foam meter in accordance with the provisions of GB / T 13173-2008 (recording the initial foam height). The results are shown in Table 10.

[0165] Table 10 Rinse foam height test of Example 52, Examples 56-63, and Comparative Example 5

[0166]

[0167] Sodium cocoyl glycinate foams abundantly, producing large amounts of foam during laundry washing, while potassium oleate quickly breaks foam during rinsing, resolving the problem of laundry detergent residue and difficulty rinsing. Table 10 shows that in Example 52, Examples 56-63, and Comparative Example 5, the highest foam height, at 10 mm, was observed after four rinses in Comparative Example 5. At this point, photocatalytic disinfectant laundry detergent is difficult to rinse thoroughly, and repeated rinsing can easily damage clothing. When the ratio of sodium cocoyl glycinate and potassium oleate is changed and the amount of the second anionic surfactant remains unchanged, the foam height first decreases and then increases. When the ratio of sodium cocoyl glycinate and potassium oleate is 1:0.9, the foam height of four rinses in Example 56 is 6 mm; when the ratio of sodium cocoyl glycinate and potassium oleate is fixed at 1:0.9 and only the amount of the mixture of sodium cocoyl glycinate and potassium oleate is changed, the foam height first decreases and then increases. When the amount of the mixture of sodium cocoyl glycinate and potassium oleate is 5 parts, the foam height of four rinses in Example 61 is 0 mm. At this time, the photocatalyst sterilization and disinfection laundry detergent can be completely rinsed clean in four times, and the number of rinses is small, which solves the problem of easy residue of laundry detergent and effectively reduces damage to clothes.

[0168] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a photocatalytic sterilization and disinfection laundry detergent, characterized in that: The preparation method of the photocatalyst sterilization and disinfection laundry detergent comprises the following steps: S1: Add the first portion of deionized water, photocatalyst nano-titanium dioxide, the first anionic surfactant, and the nonionic surfactant into a beaker, and stir at 40°C to 80°C for 2h to 5h to obtain a mixture A; S2: adding the improved chelating agent, the improved bactericide, the second anionic surfactant, and the odor neutralizer to the mixture A and stirring for 1 hour to obtain a mixture B; S3: transferring the mixture B to a reactor and maintaining it at 40°C to 50°C for 3h to 6h to obtain a mixture C; S4: adding the remaining deionized water, hydroxypropyl methylcellulose, amylase, protease, lavender essential oil, and tea tree essential oil to a beaker, and stirring at room temperature for 2 h to obtain a mixture D; S5: mixing and stirring the mixture C and the mixture D, and adding sodium hydroxide to adjust the pH value to 8 after stirring evenly, to finally obtain the photocatalyst sterilization and disinfection laundry detergent; The raw materials for producing the photocatalyst sterilization and disinfection laundry detergent include, in parts: 0.5-1 parts of the photocatalyst nano-titanium dioxide; 5-10 parts of the first anionic surfactant; 2-6 parts of the nonionic surfactant; 0.3-0.7 parts of the improved chelating agent; 0.1-0.5 parts of the improved sterilizer; 3-7 parts of the second anionic surfactant; 0.5 parts of the odor neutralizer; 0.5 parts of hydroxypropyl methylcellulose; 0.1 parts of amylase; 0.1 parts of protease; 0.1 parts of lavender essential oil; 0.1 parts of tea tree essential oil; and 30 parts of deionized water.

2. The method for preparing a photocatalytic sterilizing and disinfecting laundry detergent according to claim 1, wherein: The amount of the first portion of deionized water in S1 is 60% of the total amount of deionized water.

3. The method for preparing a photocatalytic sterilizing and disinfecting laundry detergent according to claim 1, wherein: The remaining amount of deionized water in S4 is 40% of the total amount of deionized water.

4. The method for preparing a photocatalytic sterilizing and disinfecting laundry detergent according to claim 1, wherein: The first anionic surfactant is a mixture of sodium fatty alcohol polyoxyethylene ether sulfate and sodium lauryl sulfate; wherein the ratio of the sodium fatty alcohol polyoxyethylene ether sulfate to the sodium lauryl sulfate is 1:

1.

5. The method for preparing a photocatalytic sterilizing and disinfecting laundry detergent according to claim 1, wherein: The nonionic surfactant is one of fatty alcohol polyoxyethylene ether and alkyl glycoside.

6. The method for preparing a photocatalytic sterilizing and disinfecting laundry detergent according to claim 1, wherein: The improved chelating agent is a mixture of acrylic acid maleic acid copolymer and ethylenediaminetetraacetic acid; wherein the acrylic acid maleic acid copolymer and the ethylenediaminetetraacetic acid have a ratio of 1:1.2-1.

6.

7. The method for preparing a photocatalytic sterilizing and disinfecting laundry detergent according to claim 1, wherein: The preparation method of the improved disinfectant is as follows: 4-8 parts of p-chloro-metaxylenol, 5 parts of alkylphenol polyoxyethylene ether, and 8-12 parts of soapberry extract are added to 20 parts of deionized water, and the mixture is evenly mixed to obtain the improved disinfectant.

8. The method for preparing a photocatalytic sterilizing and disinfecting laundry detergent according to claim 1, wherein: The second anionic surfactant is a mixture of sodium cocoyl glycinate and potassium oleate; wherein the ratio of the sodium cocoyl glycinate to the potassium oleate is 1:0.8-1.

2.

9. The method for preparing a photocatalytic sterilizing and disinfecting laundry detergent according to claim 1, wherein: The odor neutralizer is soybean ethyl sulfate morpholine.

10. A photocatalyst sterilization and disinfection laundry detergent, characterized by: The synthetic raw materials of the photocatalyst sterilizing and disinfecting laundry liquid include photocatalyst nano titanium dioxide, a first anionic surfactant, a nonionic surfactant, an improved chelating agent, an improved sterilizing agent, a second anionic surfactant, an odor neutralizer, hydroxypropyl methylcellulose, amylase, protease, lavender essential oil, tea tree essential oil and deionized water; the photocatalyst sterilizing and disinfecting laundry liquid is prepared by the preparation method according to any one of claims 1 to 9; the photocatalyst sterilizing and disinfecting laundry liquid has a decontamination ratio of 1.38 for carbon black stained cloth and a decontamination ratio of 1.38 for protein stained cloth. The decontamination ratio for dirty cloth is 1.61, and the decontamination ratio for sebum-stained cloth is 1.83; the whiteness retention rate of the photocatalyst sterilization and disinfection laundry liquid for clothes is 97.5%; the hand feel of the clothes after the photocatalyst sterilization and disinfection laundry liquid is 9.1 points; the bactericidal rate of the photocatalyst sterilization and disinfection laundry liquid for Escherichia coli is 99.9%, the bactericidal rate for Staphylococcus aureus is 99.9%, and the bactericidal rate for Candida albicans is 99.9%; the foam height of the photocatalyst sterilization and disinfection laundry liquid after 4 rinses is 0 mm.

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