Safe residue-free detergent and preparation method thereof

Abstract

The invention discloses a safe residue-free dishwashing liquid and a preparation method thereof, and belongs to the technical field of surfactants, the dishwashing liquid takes coco-glucoside and alkyl polyglucoside as main components, and auxiliary components such as a functional agent, glycerol, phenoxyethanol, citric acid and a kumquat extract are added. The functional agent is prepared through a special process, so that the detergency and the stability of the detergent are enhanced. Compared with the prior art, the detergent disclosed by the invention has a good decontamination effect, can form a hydrophobic membrane on the surface of tableware, reduce water marks and spots, improve the draining rate, keep the pH value neutral, and is mild, non-irritant, biodegradable and in line with modern environmental protection and health concepts.

Description

Technical Field

[0001] The invention relates to the technical field of surfactants, and in particular to a safe and residue-free detergent and a preparation method thereof. Background Art

[0002] As people's quality of life improves, the requirements for washing tableware and fruits and vegetables are getting higher and higher. Although traditional dishwashing liquids have good decontamination ability, they often have certain residue problems, which may pose potential risks to human health. In addition, the chemical components in traditional dishwashing liquids may have adverse effects on the environment. Therefore, the development of a safe, residue-free, and environmentally friendly dishwashing liquid has become an urgent need in the industry.

[0003] The existing dishwashing liquids mostly use chemically synthesized surfactants, such as sodium alkylbenzene sulfonate (LAS) and sodium fatty alcohol ether sulfate (AES). These substances are difficult to degrade in the environment, and long-term accumulation may cause water quality and ecological pollution. At the same time, these chemically synthesized surfactants may irritate the skin and are not suitable for use on sensitive skin.

[0004] In addition, the existing detergent formulas often lack consideration of the surface characteristics of tableware after washing. During the washing process, water marks and spots are easily formed on the surface of tableware, which affects the appearance and may breed bacteria. Therefore, there is a need for a detergent that can form a hydrophobic film on the surface of tableware after washing to reduce the water retention time, increase the draining rate of tableware, reduce the generation of water marks and spots, and reduce the risk of bacterial growth.

[0005] Chinese invention patent CN103468427A discloses a viscosity stabilizer and its application in the preparation of detergent, wherein the viscosity stabilizer comprises component (a) selected from at least one of carboxymethyl cellulose, hydroxyethyl cellulose or xanthan gum and component (b) selected from at least one of sodium citrate, potassium citrate, sodium chloride or sodium sulfate. The application also provides a mild dishwashing liquid with stable viscosity, which contains the following components in percentage by weight based on the total weight of the dishwashing liquid: 0.1-0.3% viscosity stabilizer; 28-32% a-olefin sulfonate: 8-12% alkyl glucoside; 3-7% cocamidopropylamine oxide; 0.25-0.35% citric acid; 0.03-0.5% disodium ethylenediaminetetraacetate; 0.02-0.5% preservative; 0.01-0.5% fragrance; water balance; wherein the viscosity stabilizer is the above-mentioned viscosity stabilizer, and the weight ratio of the (a) to the (b) in the viscosity stabilizer is 6:4-10:1. However, its decontamination ability is poor and its stability is insufficient. Summary of the invention

[0006] In view of the defects of the prior art, the present invention aims to provide a safe and residue-free detergent and a preparation method thereof, which not only has good decontamination ability, but also can form a hydrophobic film on the surface of tableware after washing, reduce the generation of water marks and spots, and improve the draining rate, while ensuring that there are no harmful residues, and is friendly to the human body and the environment. The present invention achieves the above goals by carefully selecting and using natural and biodegradable ingredients, as well as optimizing the formula ratio, and meets the growing demand of modern consumers for the safety, environmental protection and functionality of washing products.

[0007] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0008] A method for preparing a safe and residue-free detergent is as follows, in parts by weight:

[0009] Heat 40-60 parts of water to 30-50°C, add 20-40 parts of coconut glucoside, 5-10 parts of alkyl polysaccharide and 0.1-0.3 parts of functional agent, continue stirring to ensure uniform mixing, add pH adjuster to adjust pH value to 6-8; add 0.5-1 part of tea tree oil, then add 0.1-0.3 parts of preservative and 0.5-1 parts of moisturizer respectively, finally add 0.5-1 parts of natural fragrance, stir until the mixture cools to room temperature, and then fill it to obtain safe and residue-free detergent.

[0010] The humectant is glycerin.

[0011] The preservative is phenoxyethanol.

[0012] The pH adjuster is citric acid.

[0013] The natural flavor is kumquat extract.

[0014] The preparation method of the functional agent is as follows, in parts by weight:

[0015] S1. Place 1 to 2 parts of microcrystalline cellulose in 15 to 25 parts of a mixed solution, wherein the mixed solution is a mixture of 0.5 to 2 mol / L sodium hydroxide aqueous solution and 50 to 80 wt% ethanol aqueous solution in a mass ratio of 0.5 to 2:0.5 to 2; perform a heat stirring treatment at 60 to 80° C. for 20 to 40 minutes; and then perform an ultrasonic treatment to obtain a pretreated cellulose pulp;

[0016] S2, adding 0.05-0.2 parts of 2-chloroacrylic acid to the pretreated cellulose pulp prepared in S1 for 1-3 hours, adjusting the pH value of the reaction system to neutral with 0.05-0.2 mol / L dilute hydrochloric acid, and then adding 0.01-0.03 parts of an initiator; adding 0.05-0.2 parts of a 2-8 wt% aqueous solution of 1,3-bis(trimethylammonio)-2-methylacrylate dichloride; treating at 50-70° C. for 2-4 hours to obtain post-treated cellulose;

[0017] S3. Mix the post-treated cellulose prepared in S2 with 0.5-1 parts of an amino acid mixture, and add 0.005-0.02 parts of sodium hexametaphosphate, first treat at 20-40°C for 5-10 minutes, then treat at 50-70°C for 4-8 minutes, then dry the sample, add 0.2-0.6 parts of water and stir, repeat the process of heating, drying, adding water and stirring 3-5 times, finally, collect the product through centrifugation and washing process, and vacuum dry it to obtain a functional agent.

[0018] The initiator is ammonium persulfate.

[0019] The ultrasonic treatment time is 5 to 15 minutes, the ultrasonic power is 200 to 500 W, and the ultrasonic frequency is 20 to 60 kHz.

[0020] The amino acid mixture is composed of glycine, cysteine ​​and threonine in a molar ratio of 1-3:3-5:0.5-2.

[0021] In the preparation method of the safe and residue-free detergent of the present invention, the functions of the various substances are as follows:

[0022] Water is used as a base medium to dissolve and mix other ingredients.

[0023] Coco-glucoside is a plant-derived nonionic surfactant with excellent detergency and foaming ability and is friendly to the skin and the environment.

[0024] Alkyl polyglycoside is another mild nonionic surfactant that provides additional detergency and foam stability.

[0025] Functional agent is a specially prepared additive that enhances the detergent's cleaning ability and improves its stability and performance.

[0026] Citric acid is used to adjust the pH of dishwashing liquid to neutral, making it gentler and less irritating to the skin and helping to improve cleaning results.

[0027] Tea Tree Oil is a natural antimicrobial, providing antibacterial properties while also delivering a refreshing scent.

[0028] Phenoxyethanol is a common preservative used to extend the shelf life of dishwashing liquids.

[0029] Glycerin acts as a humectant, helping to keep skin soft and reducing the dryness that dishwashing detergents may cause.

[0030] Kumquat extract provides natural flavor and may also have antibacterial and anti-inflammatory properties.

[0031] In the preparation process of functional agent:

[0032] Microcrystalline cellulose is a cellulose-derived polysaccharide that has been specially processed to enhance its performance in detergents.

[0033] A mixed solution of aqueous sodium hydroxide solution and aqueous ethanol solution is used for pretreatment of cellulose, wherein the sodium hydroxide provides an alkaline environment, and the ethanol increases the permeability and reactivity of the solution.

[0034] 2-Chloroacrylic acid is used as a reactant to enhance the hydrophilicity and lipophilicity of cellulose.

[0035] Dilute hydrochloric acid is used to adjust the pH value of the reaction system to neutral to control the reaction conditions.

[0036] Ammonium persulfate acts as an initiator to promote the reaction.

[0037] The aqueous solution of 1,3-bis(trimethylamino)-2-methylacrylate dichloride further modifies the cellulose and increases its surface activity.

[0038] The amino acid mixture (glycine, cysteine, threonine) provides a variety of amino acids, which helps to enhance the biocompatibility and environmental friendliness of the functional agent.

[0039] Sodium hexametaphosphate is used as a catalyst to promote the formation of the functional agent.

[0040] Through the synergistic effect of these ingredients, the dishwashing liquid of the present invention not only provides a good cleaning effect, but also ensures safety and environmental friendliness.

[0041] Compared with the prior art, it has the following beneficial effects:

[0042] 1) The detergent of the present invention exhibits excellent detergency and stability by carefully selecting and mixing a variety of surfactants, such as coconut oil-based glucoside and alkyl polyglycoside, and introducing specific functional agents.

[0043] 2) The detergent ingredients of the present invention are all made of biodegradable materials, such as coconut glucoside and modified cellulose, which means that after use, the detergent can be more easily decomposed by the environment, reducing potential pollution to water bodies and ecosystems.

[0044] 3) The ingredients such as glycerin and kumquat extract added to the detergent of the present invention provide a gentle washing experience and reduce irritation to the skin. In addition, by adjusting the pH value to neutral, the mildness of the detergent is further ensured, making it suitable for use on sensitive skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 , Figure 2 , Figure 3 This is a test report for the safe and residue-free dishwashing liquid (the sample name is Kumquat Dishwashing Liquid) prepared in Example 1. DETAILED DESCRIPTION

[0046] Main sources of substances:

[0047] Kumquat extract: Item No.: JJ-365, Xi'an Plant Biotechnology Co., Ltd.

[0048] Tea tree oil: Item No.: 005, Main components: 4-terpineol, Ji'an Guoguang Spice Factory.

[0049] Microcrystalline cellulose: Product No.: 325-58, Henan Tianxing Food Additive Co., Ltd.

[0050] 1,3-Bis(trimethylamino)-2-methylacrylate propyl dichloride: CAS number: 115506-21-3.

[0051] Benzyldiethyl[2-[(2-methyl-1-oxoallyl)oxy]: CAS No.: 93842-84-3.

[0052] (2,3-Epoxypropyl)[2-(isobutyleneoxy)ethyl]dimethylammonium chloride: CAS number: 62351-05-7.

[0053] Methacryloyloxyethyltrimethylammonium chloride: CAS number: 5039-78-1.

[0054] The remaining raw materials in the examples and comparative examples of the present invention are all commercially available products.

[0055] The design idea of ​​the present invention is to create a safe and residue-free dishwashing liquid, which not only provides efficient decontamination ability, but also pays attention to environmental protection and human health. In order to achieve this goal, coconut oil-based glucoside and alkyl polysaccharide are used as mild and biodegradable surfactants in the invention to ensure the washing effect and mildness to the skin. In the preparation process of the functional agent, microcrystalline cellulose and amino acid mixture are particularly introduced, and the detergency and stability of the dishwashing liquid are enhanced through specific chemical treatment and physical processing steps. In addition, the added tea tree oil, phenoxyethanol, glycerol and kumquat extract not only provide additional antibacterial and skin care effects for the dishwashing liquid, but also increase the natural fragrance and use pleasure of the product. The whole formula avoids the use of harmful chemicals and meets the needs of modern consumers for green, healthy and environmentally friendly products.

[0056] Example 1

[0057] A method for preparing a safe and residue-free detergent is as follows:

[0058] Heat 50 kg of water to 40°C, add 30 kg of coconut glucoside, 8 kg of alkyl polysaccharide and 0.2 kg of functional agent, continue stirring to ensure uniform mixing, add citric acid to adjust the pH value to 7; add 0.8 kg of tea tree oil, then add 0.2 kg of phenoxyethanol and 0.8 kg of glycerin respectively, and finally add 0.8 kg of kumquat extract, stir until the mixture cools to room temperature, and then fill it to obtain a safe and residue-free dishwashing liquid.

[0059] The preparation method of the functional agent is as follows:

[0060] S1, placing 1.5 kg of microcrystalline cellulose in 20 kg of a mixed solution, wherein the mixed solution is a mixture of 1 mol / L sodium hydroxide aqueous solution and 70 wt % ethanol aqueous solution in a mass ratio of 1:1; performing a heat stirring treatment at 70° C. for 30 minutes; and then performing an ultrasonic treatment for 10 minutes at an ultrasonic power of 400 W and an ultrasonic frequency of 40 kHz to obtain a pretreated cellulose pulp;

[0061] S2, adding 0.1 kg of 2-chloroacrylic acid to the pretreated cellulose pulp prepared in S1 for treatment for 2 hours, adjusting the pH value of the reaction system to neutral with 0.1 mol / L dilute hydrochloric acid, and then adding 0.02 kg of ammonium persulfate; adding 0.1 kg of 5 wt% 1,3-bis(trimethylammonio)-2-methylacrylate dichloride aqueous solution; treating at 60° C. for 3 hours to obtain post-treated cellulose;

[0062] S3. The post-treated cellulose prepared in S2 is mixed with 0.8 kg of an amino acid mixture, wherein the amino acid mixture is composed of glycine, cysteine ​​and threonine in a molar ratio of 2:4:1, and 0.01 kg of sodium hexametaphosphate is added. The mixture is first treated at 30°C for 8 minutes and then at 60°C for 6 minutes. The sample is then dried and 0.4 kg of water is added and stirred. The process of heating, drying, adding water and stirring is repeated 4 times. Finally, the product is collected by centrifugation and washing, and vacuum dried to obtain a functional agent.

[0063] Example 2

[0064] The preparation method of a safe and residue-free dishwashing liquid is basically the same as that of Example 1, the only difference being the functional agent.

[0065] The preparation method of the functional agent is as follows:

[0066] S1, placing 1.5 kg of microcrystalline cellulose in 20 kg of a mixed solution, wherein the mixed solution is a mixture of 1 mol / L sodium hydroxide aqueous solution and 70 wt % ethanol aqueous solution in a mass ratio of 1:1; performing a heat stirring treatment at 70° C. for 30 minutes; and then performing an ultrasonic treatment for 10 minutes at an ultrasonic power of 400 W and an ultrasonic frequency of 40 kHz to obtain a pretreated cellulose pulp;

[0067] S2, adding 0.1 kg of difluorochloroacetic acid to the pretreated cellulose pulp prepared in S1 for treatment for 2 hours, adjusting the pH value of the reaction system to neutral with 0.1 mol / L dilute hydrochloric acid, and then adding 0.02 kg of ammonium persulfate; adding 0.1 kg of 5 wt% 1,3-bis(trimethylammonio)-2-methylacrylate dichloride aqueous solution; treating at 60° C. for 3 hours to obtain post-treated cellulose;

[0068] S3. The post-treated cellulose prepared in S2 is mixed with 0.8 kg of an amino acid mixture, wherein the amino acid mixture is composed of glycine, cysteine ​​and threonine in a molar ratio of 2:4:1, and 0.01 kg of sodium hexametaphosphate is added. The mixture is first treated at 30°C for 8 minutes and then at 60°C for 6 minutes. The sample is then dried and 0.4 kg of water is added and stirred. The process of heating, drying, adding water and stirring is repeated 4 times. Finally, the product is collected by centrifugation and washing, and vacuum dried to obtain a functional agent.

[0069] Example 3

[0070] The preparation method of a safe and residue-free dishwashing liquid is basically the same as that of Example 1, the only difference being the functional agent.

[0071] The preparation method of the functional agent is as follows:

[0072] S1, placing 1.5 kg of microcrystalline cellulose in 20 kg of a mixed solution, wherein the mixed solution is a mixture of 1 mol / L sodium hydroxide aqueous solution and 70 wt % ethanol aqueous solution in a mass ratio of 1:1; performing a heat stirring treatment at 70° C. for 30 minutes; and then performing an ultrasonic treatment for 10 minutes at an ultrasonic power of 400 W and an ultrasonic frequency of 40 kHz to obtain a pretreated cellulose pulp;

[0073] S2, adding 0.1 kg of chloroacetic acid to the pretreated cellulose pulp prepared in S1 for treatment for 2 hours, adjusting the pH value of the reaction system to neutral with 0.1 mol / L dilute hydrochloric acid, and then adding 0.02 kg of ammonium persulfate; adding 0.1 kg of 5 wt% 1,3-bis(trimethylammonio)-2-methylacrylate dichloride aqueous solution; treating at 60° C. for 3 hours to obtain post-treated cellulose;

[0074] S3. The post-treated cellulose prepared in S2 is mixed with 0.8 kg of an amino acid mixture, wherein the amino acid mixture is composed of glycine, cysteine ​​and threonine in a molar ratio of 2:4:1, and 0.01 kg of sodium hexametaphosphate is added. The mixture is first treated at 30°C for 8 minutes and then at 60°C for 6 minutes. The sample is then dried and 0.4 kg of water is added and stirred. The process of heating, drying, adding water and stirring is repeated 4 times. Finally, the product is collected by centrifugation and washing, and vacuum dried to obtain a functional agent.

[0075] Example 4

[0076] The preparation method of a safe and residue-free dishwashing liquid is basically the same as that of Example 1, the only difference being the functional agent.

[0077] The preparation method of the functional agent is as follows:

[0078] S1, placing 1.5 kg of microcrystalline cellulose in 20 kg of a mixed solution, wherein the mixed solution is a mixture of 1 mol / L sodium hydroxide aqueous solution and 70 wt % ethanol aqueous solution in a mass ratio of 1:1; performing a heat stirring treatment at 70° C. for 30 minutes; and then performing an ultrasonic treatment for 10 minutes at an ultrasonic power of 400 W and an ultrasonic frequency of 40 kHz to obtain a pretreated cellulose pulp;

[0079] S2, adding 0.1 kg of 2-chloroacrylic acid to the pretreated cellulose pulp prepared in S1 for treatment for 2 hours, adjusting the pH value of the reaction system to neutral with 0.1 mol / L dilute hydrochloric acid, and then adding 0.02 kg of ammonium persulfate; adding 0.1 kg of 5 wt% benzyldiethyl[2-[(2-methyl-1-oxoallyl)oxyl aqueous solution; treating at 60° C. for 3 hours to obtain post-treated cellulose;

[0080] S3. The post-treated cellulose prepared in S2 is mixed with 0.8 kg of an amino acid mixture, wherein the amino acid mixture is composed of glycine, cysteine ​​and threonine in a molar ratio of 2:4:1, and 0.01 kg of sodium hexametaphosphate is added. The mixture is first treated at 30°C for 8 minutes and then at 60°C for 6 minutes. The sample is then dried and 0.4 kg of water is added and stirred. The process of heating, drying, adding water and stirring is repeated 4 times. Finally, the product is collected by centrifugation and washing, and vacuum dried to obtain a functional agent.

[0081] Example 5

[0082] The preparation method of a safe and residue-free dishwashing liquid is basically the same as that of Example 1, the only difference being the functional agent.

[0083] The preparation method of the functional agent is as follows:

[0084] S1, placing 1.5 kg of microcrystalline cellulose in 20 kg of a mixed solution, wherein the mixed solution is a mixture of 1 mol / L sodium hydroxide aqueous solution and 70 wt % ethanol aqueous solution in a mass ratio of 1:1; performing a heat stirring treatment at 70° C. for 30 minutes; and then performing an ultrasonic treatment for 10 minutes at an ultrasonic power of 400 W and an ultrasonic frequency of 40 kHz to obtain a pretreated cellulose pulp;

[0085] S2, adding 0.1 kg of 2-chloroacrylic acid to the pretreated cellulose pulp prepared in S1 for treatment for 2 hours, adjusting the pH value of the reaction system to neutral with 0.1 mol / L dilute hydrochloric acid, and then adding 0.02 kg of ammonium persulfate; adding 0.1 kg of 5 wt% (2,3-epoxypropyl) [2- (isobutylene oxy) ethyl] dimethyl ammonium chloride aqueous solution; treating at 60° C. for 3 hours to obtain post-treated cellulose;

[0086] S3. The post-treated cellulose prepared in S2 is mixed with 0.8 kg of an amino acid mixture, wherein the amino acid mixture is composed of glycine, cysteine ​​and threonine in a molar ratio of 2:4:1, and 0.01 kg of sodium hexametaphosphate is added. The mixture is first treated at 30°C for 8 minutes and then at 60°C for 6 minutes. The sample is then dried and 0.4 kg of water is added and stirred. The process of heating, drying, adding water and stirring is repeated 4 times. Finally, the product is collected by centrifugation and washing, and vacuum dried to obtain a functional agent.

[0087] Example 6

[0088] The preparation method of a safe and residue-free dishwashing liquid is basically the same as that of Example 1, the only difference being the functional agent.

[0089] The preparation method of the functional agent is as follows:

[0090] S1, placing 1.5 kg of microcrystalline cellulose in 20 kg of a mixed solution, wherein the mixed solution is a mixture of 1 mol / L sodium hydroxide aqueous solution and 70 wt % ethanol aqueous solution in a mass ratio of 1:1; performing a heat stirring treatment at 70° C. for 30 minutes; and then performing an ultrasonic treatment for 10 minutes at an ultrasonic power of 400 W and an ultrasonic frequency of 40 kHz to obtain a pretreated cellulose pulp;

[0091] S2, adding 0.1 kg of 2-chloroacrylic acid to the pretreated cellulose pulp prepared in S1 for treatment for 2 hours, adjusting the pH value of the reaction system to neutral with 0.1 mol / L dilute hydrochloric acid, and then adding 0.02 kg of ammonium persulfate; adding 0.1 kg of 5 wt% methacryloyloxyethyltrimethylammonium chloride aqueous solution; treating at 60° C. for 3 hours to obtain post-treated cellulose;

[0092] S3. The post-treated cellulose prepared in S2 is mixed with 0.8 kg of an amino acid mixture, wherein the amino acid mixture is composed of glycine, cysteine ​​and threonine in a molar ratio of 2:4:1, and 0.01 kg of sodium hexametaphosphate is added. The mixture is first treated at 30°C for 8 minutes and then at 60°C for 6 minutes. The sample is then dried and 0.4 kg of water is added and stirred. The process of heating, drying, adding water and stirring is repeated 4 times. Finally, the product is collected by centrifugation and washing, and vacuum dried to obtain a functional agent.

[0093] Comparative Example 1

[0094] The preparation method of a safe and residue-free dishwashing liquid is basically the same as that of Example 1, the only difference being the functional agent.

[0095] The preparation method of the functional agent is as follows:

[0096] S1, placing 1.5 kg of microcrystalline cellulose in 20 kg of a mixed solution, wherein the mixed solution is a mixture of 1 mol / L sodium hydroxide aqueous solution and 70 wt % ethanol aqueous solution in a mass ratio of 1:1; performing a heat stirring treatment at 70° C. for 30 minutes; and then performing an ultrasonic treatment for 10 minutes at an ultrasonic power of 400 W and an ultrasonic frequency of 40 kHz to obtain a pretreated cellulose pulp;

[0097] S2, adding 0.1 kg of 2-chloroacrylic acid to the pretreated cellulose pulp prepared in S1 for treatment for 2 hours, adjusting the pH value of the reaction system to neutral with 0.1 mol / L dilute hydrochloric acid, and then adding 0.02 kg of ammonium persulfate; adding 0.1 kg of 5 wt% 1,3-bis(trimethylammonio)-2-methylacrylate dichloride aqueous solution; treating at 60° C. for 3 hours to obtain post-treated cellulose;

[0098] S3. The post-treated cellulose prepared in S2 is collected through centrifugation and washing processes, and vacuum dried to obtain a functional agent.

[0099] Comparative Example 2

[0100] A method for preparing a safe and residue-free detergent is as follows:

[0101] Heat 50 kg of water to 40°C, add 30 kg of coconut glucoside, 8 kg of alkyl polysaccharide and 2 kg of microcrystalline cellulose, continue stirring to ensure uniform mixing, add citric acid to adjust the pH value to 7; add 0.8 kg of tea tree oil, then add 0.2 kg of phenoxyethanol and 0.8 kg of glycerin respectively, and finally add 0.8 kg of kumquat extract, stir until the mixture cools to room temperature, and then fill it to obtain a safe and residue-free dishwashing liquid.

[0102] Comparative Example 3

[0103] A method for preparing a safe and residue-free detergent is as follows:

[0104] Heat 50 kg of water to 40°C, add 30 kg of coconut glucoside and 8 kg of alkyl polysaccharide, continue stirring to ensure uniform mixing, add citric acid to adjust the pH value to 7; add 0.8 kg of tea tree oil, then add 0.2 kg of phenoxyethanol and 0.8 kg of glycerin respectively, and finally add 0.8 kg of kumquat extract, stir until the mixture cools to room temperature, and then fill it to obtain a safe and residue-free dishwashing liquid.

[0105] Test Example 1

[0106] Determination of detergency

[0107] According to the "Oil Removal Rate Method (Arbitration Method)" in Appendix A of the national standard GB / T 9985-2022 "Detergents for Hand-washing Dishwashing", the detergency of the safe and residue-free dishwashing detergents prepared in Examples 1 to 6 and Comparative Examples 1 to 3 was tested.

[0108] The test results are shown in Table 1.

[0109] Table 1

[0110]

[0111]

[0112] Test Example 2

[0113] Stability test

[0114] The stability of the safe and residue-free detergents prepared in Examples 1 to 6 and Comparative Examples 1 to 3 was measured with reference to GB / T 13173-2021 "Test Methods for Surfactant Detergents". After being stored at (40±2)°C for 24 hours and returned to room temperature, the stratification, precipitation, odor and discoloration phenomena were observed; after being stored at (-5±2)°C for 24 hours and returned to room temperature, the stratification, precipitation and discoloration phenomena were observed.

[0115] The test results are shown in Table 2.

[0116] Table 2

[0117]

[0118]

[0119] It can be seen from the data in Tables 1 and 2 that the safe and residue-free detergent prepared in Example 1 has the best detergency and stability.

[0120] In Example 1 of the present invention, 2-chloroacrylic acid is used as a modifier of a functional agent, and its superior detergency and stability may be related to its unique molecular structure and reaction characteristics. 2-chloroacrylic acid contains a chlorine atom and an acrylic acid group, and this structure enables it to participate in esterification or carboxylation reactions through the acrylic acid group, thereby enhancing the hydrophilicity and surface activity of cellulose. The chlorine atom has a strong electronegativity, which can enhance the polarity of the molecule and improve the interaction force with cellulose. On the other hand, the acrylic acid group can participate in the modification reaction of cellulose, and introduce carboxyl groups on the cellulose molecular chain through the reaction. These carboxyl groups not only increase the hydrophilicity of cellulose, but may also undergo ion exchange or form hydrogen bonds during the washing process, further improving the detergency. In addition, the presence of carboxyl groups may also increase the buffering capacity of the detergent, help maintain the pH value of the washing liquid stable, and thus improve the stability of the product. In contrast, although difluorochloroacetic acid and chloroacetic acid also have certain electrophilicity and reactivity, they may not be able to introduce enough active sites and hydrophilic groups on cellulose like 2-chloroacrylic acid.

[0121] The reason why the aqueous solution of 1,3-bis(trimethylammonium)-2-methylpropenoate dichloride used in Example 1 exhibits superior detergency and stability can be attributed to its unique molecular structure. The compound contains two trimethylammonium groups, which endow the molecule with excellent surface activity, can effectively interact with grease and dirt, and enhance its ability to remove stains through electrostatic and hydrogen bonding. At the same time, the micellar structure formed by its quaternary ammonium salt structure in the aqueous solution helps to suspend and disperse stains, prevent stains from being deposited again, thereby improving the washing efficiency. In addition, this structure also helps to form a stable emulsion, enhancing the stability of the detergent. In contrast, the compounds used in other embodiments may perform slightly worse in terms of detergency and stability due to the different hydrophilic-lipophilic balance in the molecular structure. Therefore, the structure-performance relationship of the aqueous solution of 1,3-bis(trimethylammonium)-2-methylpropenoate dichloride makes it a key factor in improving the detergency and stability of detergents.

[0122] In Example 1 of the present invention, a functional agent of an amino acid mixture of glycine, cysteine ​​and threonine is added, and the prepared dishwashing liquid exhibits better detergency and stability compared to Comparative Example 1 in which no amino acids are added. The molecular structure of these amino acids has hydrophilic and hydrophobic groups, which help to form stable micelles and enhance the ability to emulsify and disperse stains. The thiol group of cysteine ​​can chelate metal ions, improve the stability of the dishwashing liquid, and has an antioxidant effect to protect the product from oxidation. In addition, the mild nature of amino acids reduces irritation to the skin and increases the safety of the dishwashing liquid. Therefore, these characteristics of amino acids work together to make the dishwashing liquid of Example 1 perform better in terms of detergency and stability.

Claims

1. A method for preparing a safe and residue-free detergent, characterized in that: The method is as follows, in parts by weight: Heat 40-60 parts of water to 30-50° C., add 20-40 parts of coconut glucoside, 5-10 parts of alkyl polysaccharide and 0.1-0.3 parts of functional agent, continue stirring to ensure uniform mixing, add pH adjuster to adjust pH value to 6-8; add 0.5-1 parts of tea tree oil, then add 0.1-0.3 parts of preservative and 0.5-1 parts of moisturizer respectively, and finally add 0.5-1 parts of natural fragrance, stir until the mixture cools to room temperature, and then fill it to obtain safe and residue-free detergent; The preparation method of the functional agent is as follows, in parts by weight: S1. Place 1 to 2 parts of microcrystalline cellulose in 15 to 25 parts of a mixed solution, wherein the mixed solution is a mixture of 0.5 to 2 mol / L sodium hydroxide aqueous solution and 50 to 80 wt% ethanol aqueous solution in a mass ratio of 0.5 to 2:0.5 to 2; perform a heat stirring treatment at 60 to 80° C. for 20 to 40 minutes; and then perform an ultrasonic treatment to obtain a pretreated cellulose pulp; S2, adding 0.05-0.2 parts of 2-chloroacrylic acid to the pretreated cellulose pulp prepared in S1 for 1-3 hours, adjusting the pH value of the reaction system to neutral with 0.05-0.2 mol / L dilute hydrochloric acid, and then adding 0.01-0.03 parts of an initiator; adding 0.05-0.2 parts of a 2-8 wt% aqueous solution of 1,3-bis(trimethylammonio)-2-methylacrylate dichloride; treating at 50-70° C. for 2-4 hours to obtain post-treated cellulose; S3. Mix the post-treated cellulose prepared in S2 with 0.5-1 parts of an amino acid mixture, and add 0.005-0.02 parts of sodium hexametaphosphate, first treat at 20-40°C for 5-10 minutes, then treat at 50-70°C for 4-8 minutes, then dry the sample, add 0.2-0.6 parts of water and stir, repeat the process of heating, drying, adding water and stirring 3-5 times, finally, collect the product through centrifugation and washing process, and vacuum dry it to obtain a functional agent.

2. The method for preparing a safe and residue-free detergent according to claim 1, characterized in that: The humectant is glycerin.

3. The method for preparing a safe and residue-free detergent according to claim 1, characterized in that: The preservative is phenoxyethanol.

4. The method for preparing a safe and residue-free detergent according to claim 1, characterized in that: The pH adjuster is citric acid.

5. The method for preparing a safe and residue-free detergent according to claim 1, characterized in that: The natural flavor is kumquat extract.

6. The method for preparing a safe and residue-free detergent according to claim 1, characterized in that: The initiator is ammonium persulfate.

7. The method for preparing a safe and residue-free detergent according to claim 1, characterized in that: The ultrasonic treatment time is 5 to 15 minutes, the ultrasonic power is 200 to 500 W, and the ultrasonic frequency is 20 to 60 kHz.

8. The method for preparing a safe and residue-free detergent according to claim 1, characterized in that: The amino acid mixture is composed of glycine, cysteine ​​and threonine in a molar ratio of 1-3:3-5:0.5-2.

9. A safe and residue-free detergent, characterized in that: Prepared by the preparation method according to any one of claims 1 to 8.

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