High-concentration environment-friendly laundry composition and preparation method thereof

Abstract

The invention provides a high-concentration environment-friendly laundry composition and a preparation method, and belongs to the technical field of concentrated laundry products. The laundry composition disclosed by the invention is prepared from a narrow-distribution fatty alcohol-polyoxyethylene ether AEO7 / AEO9 mixture, isomeric alcohol ether, fatty alcohol-polyoxyethylene ether sodium sulfate, microcrystalline cellulose, microcapsule plant essential oil, sodium citrate, tetrasodium glutamate diacetate, sodium polyaspartate, microcapsule biological enzyme and a preservative. Wherein the three surfactants of the narrow-distribution fatty alcohol-polyoxyethylene ether AEO7 / AEO9 mixture, the isomeric alcohol ether and the AES have a synergistic effect, so that the low-temperature stability can be improved, the hydrophilic-oleophylic balance is optimized, the detergent adapts to different water quality and temperature conditions, the micelle structure can still be maintained after the detergent is diluted by 30 times, and the detergent has relatively high viscosity and excellent foam performance and dirt-removing power.

Description

Technical Field

[0001] The present invention relates to the technical field of concentrated laundry products, and specifically relates to a highly concentrated environmentally friendly laundry composition and a preparation method thereof. Background Art

[0002] With the increasing emphasis on environmental protection and resource conservation, the detergent industry is rapidly developing towards high concentration, low-temperature applicability, and ecological friendliness. Traditional laundry detergents generally have problems such as high water content, uneven dispersion of active ingredients, and easy precipitation at low temperatures, which not only increase packaging and transportation costs but also cause pressure on the water ecosystem due to the use of ingredients such as phosphates and fluorescent whitening agents. In addition, existing concentrated detergents often have problems such as the destruction of micelle structures and the sedimentation of active ingredients after dilution, resulting in a decline in detergency performance. Therefore, developing a laundry detergent formula with high concentration characteristics, low-temperature stability, environmental protection efficiency, and dilution adaptability has become the core direction of technological research in the industry.

[0003] In the field of surfactant compounding technology, traditional nonionic surfactants have a wide distribution of ethylene oxide (EO) addition numbers, resulting in large differences in molecular polarity and cloud point dispersion, and are prone to forming turbidity or stratification at low temperatures. At the same time, anion / nonionic compounding systems often have a mismatch in hydrophilic-lipophilic balance, leading to an increase in the critical micelle concentration. Especially when the ionic strength increases under hard water conditions, the micelle stability significantly decreases.

[0004] In terms of thickening and suspension systems, traditional formulations mostly use acrylic polymers or inorganic salts for thickening, but they are prone to phase separation or shear thinning problems in concentrated systems. Although cellulose thickeners have environmental advantages, their linear molecular structure is prone to forming dense gels at high concentrations, and the network structure rapidly collapses during dilution, making it difficult to maintain suspension stability. Summary of the Invention

[0005] The purpose of the present invention is to provide a highly concentrated environmentally friendly laundry composition and a preparation method thereof. The laundry composition provided by the present invention has strong stability and can improve foam performance and detergency.

[0006] To achieve the above-mentioned invention purpose, the present invention provides the following technical solutions: The present invention provides a highly concentrated environmentally friendly laundry composition, comprising the following components in parts by weight: a narrow distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture of 15 - 35 parts, an isomeric alcohol ether of 5 - 15 parts, sodium lauryl polyoxyethylene ether sulfate of 5 - 15 parts, microcrystalline cellulose of 0.5 - 1.5 parts, microencapsulated plant essential oil of 0.5 - 1.5 parts, sodium citrate of 2 - 5 parts, tetrasodium glutamate diacetate of 0.5 - 3 parts, sodium polyaspartate of 0.5 - 1.5 parts, microencapsulated bioenzyme of 0.05 - 0.15 parts, and a preservative of 0.05 - 0.3 parts.

[0007] Preferably, the weight ratio of AEO7 to AEO9 in the narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture is 1-3:1.

[0008] Preferably, the isomeric alcohol ether is one or more of C10 isomeric alcohol ether 7EO, C10 isomeric alcohol ether 9EO, and isomeric tridecyl alcohol polyoxyethylene (5) ether.

[0009] Preferably, the method for preparing the microcapsule plant essential oil includes: mixing the plant essential oil with polyethylene glycol, stirring (high-speed) shearing, adding carboxymethyl chitosan for crosslinking, and centrifuging to obtain the microcapsule plant essential oil.

[0010] Preferably, the microcapsule plant essential oil is one or more of lavender essential oil, chamomile essential oil, and neroli essential oil.

[0011] Preferably, the method for preparing the microcapsule bioenzyme includes: mixing and emulsifying the bioenzyme solution with the sodium alginate solution, dropping it into the calcium chloride solution for crosslinking to obtain microspheres, mixing with the carboxymethyl chitosan solution, coating, and drying to obtain the microcapsule bioenzyme.

[0012] Preferably, the bioenzyme is one or more of protease, lipase, and mannanase.

[0013] Preferably, the preservative is 1,2-hexanediol or anisic acid.

[0014] The present invention also provides a method for preparing the above laundry composition, including: mixing and heating sodium citrate, tetrasodium glutamate diacetate, and sodium polyaspartate with water to obtain a chelating system; heating and mixing the narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, isomeric alcohol ether, and sodium lauryl ether sulfate, adding them to the chelating system, stirring (high-speed) shearing, adding the microcapsule plant essential oil, microcapsule bioenzyme, microcrystalline cellulose, and preservative, and homogenizing to obtain the laundry composition.

[0015] Preferably, the rotation speed of the stirring (high-speed) shearing is 1500-2500 rpm, and the time is 6-10 min.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a highly concentrated and environmentally friendly laundry composition, comprising: a narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, an isomeric alcohol ether, sodium lauryl ether sulfate, microcrystalline cellulose, microencapsulated plant essential oil, sodium citrate, tetrasodium glutamate diacetate, sodium polyaspartate, microencapsulated bioenzyme, and a preservative. Among them, there is a synergistic effect among the three surfactants of the narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, the isomeric alcohol ether, and AES, which can improve the low-temperature stability and foam performance, optimize the hydrophilic-lipophilic balance, adapt to different water qualities and temperature conditions, and still maintain the micelle structure after dilution to prevent phase separation. The microencapsulation technology effectively solves the problems of easy inactivation of the active ingredients of traditional detergents and short fragrance retention time. The test results show that the compounded surfactants can synergistically improve the stability, foam performance, and detergency, and still have a relatively high viscosity and detergency after being diluted 30 times. The present invention combines the surfactant compounding technology, the microencapsulation controlled-release process, and the environmentally friendly chelating system, which conforms to the industry trend of high concentration and low environmental load. Detailed Embodiments

[0017] The present invention provides a highly concentrated and environmentally friendly laundry composition, comprising the following components in parts by weight: 15-35 parts of a narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, 5-15 parts of an isomeric alcohol ether, 5-15 parts of sodium lauryl ether sulfate, 0.5-1.5 parts of microcrystalline cellulose, 0.5-1.5 parts of microencapsulated plant essential oil, 2-5 parts of sodium citrate, 0.5-3 parts of tetrasodium glutamate diacetate, 0.5-1.5 parts of sodium polyaspartate, 0.05-0.15 parts of microencapsulated bioenzyme, and 0.05-0.3 parts of a preservative.

[0018] In the narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture of the present invention, the weight ratio of AEO7 to AEO9 is preferably 1-3:1, more preferably 2:1, and the CV value (coefficient of variation) of the EO distribution coefficient in the narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture ≤ 15%. The narrow-distribution AEO7 / AEO9 mixture of the present invention has a more uniform molecular size, which has the effect of reducing the cloud point and improving the low-temperature stability.

[0019] The isomeric alcohol ether of the present invention is one or more of C10 isomeric alcohol ether 7EO, C10 isomeric alcohol ether 9EO, and isomeric tridecyl alcohol polyoxyethylene (5) ether. The isomeric alcohol ether of the present invention has a branched hydrophobic group that breaks the regular arrangement of molecules, reduces the freezing point (still liquid at -5°C), is suitable for cold water washing, improves the low-temperature solubility and hard water resistance of the laundry composition, and can reduce the critical micelle concentration and enhance the interfacial adsorption when used in combination with AEO7 / AEO9 and AES.

[0020] The sodium laureth sulfate described in the present invention can significantly reduce the surface tension of water. When compounded with non-ionic surfactants (such as AEO and isomeric alcohol ethers), it can form mixed micelles, improve surface activity and reduce the critical micelle concentration. Even after dilution, it can still maintain the micelle structure, prevent phase separation, and enhance the emulsifying ability for hydrophobic stains (such as edible oil and sebum). When compounded with microcrystalline cellulose, the negative charge of sodium laureth sulfate adsorbs on the fiber surface to form an electrostatic barrier, reducing dirt redeposition and improving the detergency.

[0021] In the present invention, the combination of "narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, isomeric alcohol ether, and sodium laureth sulfate" optimizes the hydrophilic-lipophilic balance, with a matching HLB value, suitable for a variety of water quality and temperature conditions, and can achieve: the micelle structure can achieve high active substance loading and low-temperature stability; broad-spectrum detergency (enhancing the removal rate of oil / protein / particle stains); improving the adaptability to hard water and low temperature; and being green and sustainable.

[0022] The preparation method of the microcapsule plant essential oil described in the present invention preferably includes: mixing the plant essential oil with polyethylene glycol, stirring (at high speed) and shearing, adding carboxymethyl chitosan for crosslinking, and centrifuging to obtain the microcapsule plant essential oil. The microcapsule plant essential oil is preferably one or more of lavender essential oil, chamomile essential oil, and neroli essential oil. By microencapsulating the plant essential oil according to the present invention, on the one hand, it can improve the stability of the plant essential oil, avoid reacting with other components in the combination species of the essential oil and affect the washing effect. On the other hand, polyethylene glycol is a water-soluble component, and it dissolves quickly during the washing stage to release part of the essential oil. During the stage of wearing the clothes, carboxymethyl chitosan slowly releases the remaining essential oil through fiber friction / pH change of sweat, prolonging the fragrance retention time.

[0023] The preparation method of the microcapsule bioenzyme described in the present invention preferably includes: mixing and emulsifying the bioenzyme solution with the sodium alginate solution, mixing with the carboxymethyl chitosan solution, coating, dropping into the glutaraldehyde solution for crosslinking, washing successively with PBS and deionized water, and drying to obtain the microcapsule bioenzyme. The bioenzyme preferably consists of protease, lipase, and mannanase. The sodium alginate-carboxymethyl chitosan double-layer microcapsule structure in the microcapsule bioenzyme can isolate the anionic surfactant in the laundry composition, avoid the reduction of bioenzyme activity, improve the stability of the bioenzyme, and during the washing process, mechanical friction destroys the outer chitosan of the microcapsule, gradually releasing the enzyme preparation, avoiding the waste caused by one-time release, and improving the detergency of protease, lipase, and mannanase.

[0024] The preservative described in the present invention is preferably 1,2-hexanediol or anisic acid.

[0025] The present invention also provides a method for preparing the above laundry composition, comprising: mixing sodium citrate, tetrasodium glutamate diacetate, sodium polyaspartate with water and heating to obtain a chelating system; heating and mixing a narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, an isomeric alcohol ether and sodium lauryl ether sulfate, adding the mixture to the chelating system, stirring and shearing, adding microencapsulated plant essential oil, microencapsulated bioenzyme, microcrystalline cellulose, and a preservative, and homogenizing to obtain the laundry composition.

[0026] In the present invention, the rotation speed of the stirring and shearing is preferably 1500 - 2500 rpm, more preferably 2000 rpm, and the time is preferably 6 - 10 min, more preferably 8 min.

[0027] In the present invention, unless otherwise specified, all raw material components are commercially available products well-known to those skilled in the art.

[0028] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the embodiments in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] In the following embodiments, unless otherwise specified, all are conventional methods.

[0030] In the following embodiments, the materials, reagents, etc. used, unless otherwise specified, can be obtained from commercial channels.

[0031] Lavender essential oil was purchased from Guangzhou Qianxiangyuan Essential Oil Co., Ltd.; chamomile essential oil was purchased from Guangzhou Qianxiangyuan Essential Oil Co., Ltd.; neroli essential oil was purchased from Guangzhou Qianxiangyuan Essential Oil Co., Ltd.; polyethylene glycol 400 was purchased from Tianjin Zhongheshengtai Chemical Co., Ltd.; carboxymethyl chitosan was purchased from Xi'an Xihai Biotechnology Co., Ltd.; protease was purchased from Shandong Yousuo Chemical Technology Co., Ltd.; lipase was purchased from Guangzhou Xumei Chemical Technology Co., Ltd.; mannanase was purchased from Zhejiang Weihong Biotechnology Co., Ltd.; fatty alcohol polyoxyethylene ether AEO7 was purchased from Guangzhou Cansheng Chemical Co., Ltd.; fatty alcohol polyoxyethylene ether AEO9 was purchased from Guangzhou Cansheng Chemical Co., Ltd.; sodium lauryl ether sulfate was purchased from Shandong Shunxing Chemical Co., Ltd.; microcrystalline cellulose was purchased from Wuxi Shengshihongcheng Biotechnology Co., Ltd.

[0032] In the examples and comparative examples, w / v refers to the mass-volume concentration. Taking a 2% (w / v) sodium alginate solution as an example, it means that every 100 mL of the solution contains 2 g of sodium alginate.

[0033] Example 1 High-concentration environmentally friendly laundry composition (1)Preparation of microencapsulated plant essential oil Mix lavender essential oil with 15 wt% polyethylene glycol 400 aqueous solution at a mass ratio of 1:4, shear and emulsify at 45 °C and a rotation speed of 1000 rpm for 15 min, cool down to 27 °C, add carboxymethyl chitosan (the addition amount is 3% of the mass of lavender essential oil), adjust the pH to 5, stand and crosslink for 3 h, centrifuge, wash 3 times with deionized water, and dry to obtain microencapsulated plant essential oil; (2)Preparation of microencapsulated bioenzyme Mix 5 mg / mL protease solution (prepared by mixing protease with phosphate buffer solution) with 2% (w / v) sodium alginate solution at a volume ratio of 1:2, emulsify at 300 rpm for 10 min, mix with 1% (w / v) carboxymethyl chitosan solution at a volume ratio of 1:3, after coating for 30 min, drop into 0.8% (w / v) glutaraldehyde solution, stir at 4 °C and 25 rpm for 3 h, collect the microspheres, wash 3 times with PBS and deionized water respectively, and dry to obtain microencapsulated protease; Prepare microencapsulated lipase and microencapsulated mannan respectively by exactly the same method; Mix microencapsulated protease, microencapsulated lipase and microencapsulated mannanase at a mass ratio of 5:3:2 to obtain microencapsulated bioenzyme; (3)Weighing Accurately weigh 20 parts of narrow - distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, 10 parts of C10 isomeric alcohol ether 7EO, 10 parts of fatty alcohol polyoxyethylene ether sodium sulfate, 1 part of microcrystalline cellulose, 1 part of microencapsulated plant essential oil, 3 parts of sodium citrate, 2 parts of glutamate diacetic acid tetrasodium, 1 part of sodium polyaspartate, 0.1 part of microencapsulated bioenzyme and 0.1 part of 1,2 - hexanediol by weight. The narrow - distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture is composed of AEO7 and AEO9 at a weight ratio of 2:1; (4)Preparation of laundry composition Mix microcrystalline cellulose with 15 parts of deionized water, first homogenize at a high speed of 2000 rpm for 15 min, then ultrasonically treat at 20 kHz for 5 min to obtain a microcrystalline cellulose colloid; mix disodium glutamate diacetate with 10 parts of deionized water at 35 °C to obtain a disodium glutamate diacetate solution, mix sodium polyaspartate with 8 parts of deionized water at 35 °C to obtain a sodium polyaspartate solution, and mix sodium lauryl polyoxyethylene ether sulfate with 20 parts of deionized water to obtain a sodium lauryl polyoxyethylene ether sulfate solution; mix a narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, C10 isomeric alcohol ether 7EO and the sodium lauryl polyoxyethylene ether sulfate solution, stir at 50 °C and 400 rpm for 30 min, sequentially add sodium citrate, the disodium glutamate diacetate solution and the sodium polyaspartate solution, continue to stir for 25 min, then add the microcrystalline cellulose colloid and continue to stir for 15 min, cool down to 30 °C, add microencapsulated plant essential oil, microencapsulated enzyme and 1,2-hexanediol, stir at a rotation speed of 200 rpm for 20 min, adjust the pH value to 7.2, sterilize to obtain the laundry composition.

[0034] Example 2 High-concentration environmentally friendly laundry composition (1) Preparation of microencapsulated plant essential oil Mix chamomile essential oil with a 13 wt% aqueous solution of polyethylene glycol 400 at a mass ratio of 1:5, shear and emulsify at a temperature of 40 °C and a rotation speed of 900 rpm for 18 min, cool down to 25 °C, add carboxymethyl chitosan (the addition amount is 2.5% of the mass of chamomile essential oil), adjust the pH to 4.8, stand for crosslinking for 2.5 h, centrifuge, wash twice with deionized water, and dry to obtain microencapsulated plant essential oil; (2) Preparation of microencapsulated enzyme Mix a 4 mg / mL protease solution (prepared by mixing protease with phosphate buffer) with a 1% (w / v) sodium alginate solution at a volume ratio of 1:1.5, emulsify at 250 rpm for 15 min, mix with a 0.8% (w / v) carboxymethyl chitosan solution at a volume ratio of 1:2, after coating for 35 min, drop it into a 0.5% (w / v) glutaraldehyde solution, stir at 2 °C and 22 rpm for 3.5 h, collect the microspheres, wash 3 times with PBS and deionized water respectively, and dry to obtain microencapsulated protease; Prepare microencapsulated lipase and microencapsulated mannan respectively by exactly the same method; Mix microencapsulated protease, microencapsulated lipase and microencapsulated mannanase at a mass ratio of 4:2:1 to obtain microencapsulated enzyme; (3) Weighing Accurately weigh 15 parts of a narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, 5 parts of a C10 isomeric alcohol ether 9EO, 5 parts of sodium lauryl polyoxyethylene ether sulfate, 0.5 part of microcrystalline cellulose, 0.5 part of microencapsulated plant essential oil, 2 parts of sodium citrate, 0.5 part of tetrasodium glutamate diacetate, 0.5 part of sodium polyaspartate, 0.05 part of microencapsulated bioenzyme, and 0.05 part of anisic acid by weight. The narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture is composed of AEO7 and AEO9 in a weight ratio of 1:1; (4) Preparation of the laundry composition Mix microcrystalline cellulose with 10 parts of deionized water, first homogenize at a high speed of 1500 rpm for 20 min, and then perform ultrasonic treatment at 18 kHz for 8 min to obtain a microcrystalline cellulose colloid; mix tetrasodium glutamate diacetate with 8 parts of deionized water at 30 °C to obtain a tetrasodium glutamate diacetate solution, mix sodium polyaspartate with 5 parts of deionized water at 30 °C to obtain a sodium polyaspartate solution, and mix sodium lauryl polyoxyethylene ether sulfate with 15 parts of deionized water to obtain a sodium lauryl polyoxyethylene ether sulfate solution; mix the narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, C10 isomeric alcohol ether 9EO, and the sodium lauryl polyoxyethylene ether sulfate solution, stir at 48 °C and 350 rpm for 35 min, sequentially add sodium citrate, the tetrasodium glutamate diacetate solution, and the sodium polyaspartate solution, continue stirring for 30 min, then add the microcrystalline cellulose colloid and continue stirring for 20 min, cool down to 28 °C, add the microencapsulated plant essential oil, microcapsules, and anisic acid, stir at a speed of 180 rpm for 25 min, adjust the pH value to 7.5, and sterilize to obtain the laundry composition.

[0035] Example 3 High-concentration environmentally friendly laundry composition (1) Preparation of microencapsulated plant essential oil Mix neroli essential oil with an 18 wt% aqueous solution of polyethylene glycol 400 in a mass ratio of 1:5, stir and shear for emulsification at a temperature of 48 °C and a speed of 1500 rpm for 12 min, cool down to 30 °C, add carboxymethyl chitosan (the addition amount is 4% of the mass of neroli essential oil), adjust the pH to 5.6, stand for crosslinking for 2 h, centrifuge, wash 4 times with deionized water, and dry to obtain the microencapsulated plant essential oil; (2) Preparation of microencapsulated bioenzyme Mix a 6 mg / mL protease solution (prepared by mixing protease with phosphate buffer) with a 3% (w / v) sodium alginate solution in a volume ratio of 1:4, emulsify for 8 min at 350 rpm, mix with a 1.5% (w / v) carboxymethyl chitosan solution in a volume ratio of 1:4, after coating for 25 min, drop into a 0.9% (w / v) glutaraldehyde solution, stir at 5 °C and 30 rpm for 2.5 h, collect the microspheres, wash 3 times with PBS and deionized water respectively, and dry to obtain microencapsulated protease; Prepare microencapsulated lipase and microencapsulated mannan respectively by exactly the same method; Mix microencapsulated protease, microencapsulated lipase and microencapsulated mannanase in a mass ratio of 6:4:3 to obtain microencapsulated bioenzyme; (3)Weighing Accurately weigh 35 parts of a narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, 15 parts of isomeric tridecanol polyoxyethylene (5) ether, 15 parts of fatty alcohol polyoxyethylene ether sodium sulfate, 1.5 parts of microcrystalline cellulose, 1.5 parts of microencapsulated plant essential oil, 5 parts of sodium citrate, 3 parts of glutamate diacetic acid tetrasodium, 1.5 parts of sodium polyaspartate, 0.15 parts of microencapsulated bioenzyme and 0.3 parts of 1,2-hexanediol. The narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture is composed of AEO7 and AEO9 in a weight ratio of 3:1; (4)Preparation of laundry composition Mix microcrystalline cellulose with 20 parts of deionized water, first homogenize at a high speed of 2500 rpm for 12 min, then ultrasonically treat at 25 kHz for 4 min to obtain a microcrystalline cellulose colloid; mix glutamate diacetic acid tetrasodium with 15 parts of deionized water at 38 °C to obtain a glutamate diacetic acid tetrasodium solution, mix sodium polyaspartate with 10 parts of deionized water at 38 °C to obtain a sodium polyaspartate solution, and mix fatty alcohol polyoxyethylene ether sodium sulfate with 28 parts of deionized water to obtain a fatty alcohol polyoxyethylene ether sodium sulfate solution; mix the narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, isomeric tridecanol polyoxyethylene (5) ether and the fatty alcohol polyoxyethylene ether sodium sulfate solution, stir at 55 °C and 450 rpm for 20 min, successively add sodium citrate, the glutamate diacetic acid tetrasodium solution and the sodium polyaspartate solution, continue to stir for 23 min, then add the microcrystalline cellulose colloid and continue to stir for 13 min, cool down to 32 °C, add the microencapsulated plant essential oil, microencapsulated bioenzyme and 1,2-hexanediol, stir at a speed of 250 rpm for 18 min, adjust the pH value to 7.8, and sterilize to obtain the laundry composition.

[0036] Comparative Example 1 The specific implementation method is the same as that of Example 1, except that "20 parts of narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, 10 parts of C10 isomeric alcohol ether 7EO, and 10 parts of sodium fatty alcohol polyoxyethylene ether sulfate" is replaced with "40 parts of narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture".

[0037] Comparative Example 2 The specific implementation method is the same as that of Example 1, except that "20 parts of narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, 10 parts of C10 isomeric alcohol ether 7EO, and 10 parts of sodium fatty alcohol polyoxyethylene ether sulfate" is replaced with "40 parts of C10 isomeric alcohol ether 7EO".

[0038] Comparative Example 3 The specific implementation method is the same as that of Example 1, except that "20 parts of narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, 10 parts of C10 isomeric alcohol ether 7EO, and 10 parts of sodium fatty alcohol polyoxyethylene ether sulfate" is replaced with "40 parts of sodium fatty alcohol polyoxyethylene ether sulfate".

[0039] Comparative Example 4 The specific implementation method is the same as that of Example 1, except that "20 parts of narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, 10 parts of C10 isomeric alcohol ether 7EO, and 10 parts of sodium fatty alcohol polyoxyethylene ether sulfate" is replaced with "26.7 parts of narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture and 13.3 parts of C10 isomeric alcohol ether 7EO".

[0040] Comparative Example 5 The specific implementation method is the same as that of Example 1, except that "20 parts of narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, 10 parts of C10 isomeric alcohol ether 7EO, and 10 parts of sodium fatty alcohol polyoxyethylene ether sulfate" is replaced with "26.7 parts of narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture and 13.3 parts of sodium fatty alcohol polyoxyethylene ether sulfate".

[0041] Comparative Example 6 The specific implementation method is the same as that of Example 1, except that "20 parts of narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, 10 parts of C10 isomeric alcohol ether 7EO, and 10 parts of sodium fatty alcohol polyoxyethylene ether sulfate" is replaced with "20 parts of C10 isomeric alcohol ether 7EO and 20 parts of sodium fatty alcohol polyoxyethylene ether sulfate".

[0042] Comparative Example 7 The specific implementation method is the same as that of Example 1, except that the microencapsulated plant essential oil is replaced with lavender essential oil, and step (1) is deleted at the same time.

[0043] Comparative Example 8 The specific implementation is the same as that of Example 1, except that the microcapsule bioenzyme is replaced by bioenzyme. The bioenzyme is composed of protease, lipase and mannanase in a weight ratio of 5:3:2, and step (2) is deleted simultaneously.

[0044] Test Example 1 Performance Test (1)Stability The stabilities of the laundry compositions of Examples 1-3 and Comparative Examples 1-8 were measured respectively. The stability test of the laundry composition refers to the patent of CN113493724B.

[0045] The stability detection method is as follows: The compositions were placed at 50°C, 40°C, 25°C and 4°C for 7 days respectively to investigate the system stability of the laundry composition, and whether there was obvious stratification and surface impurity phenomenon after one week was observed. 50 samples were tested for each example and comparative example. If less than 5 samples were unqualified, it was recorded as grade A; if greater than or equal to 5 and less than 10, it was grade B; if greater than or equal to 10, it was grade C. The observation results were recorded in Table 1.

[0046] As can be seen from Table 1, generally speaking, the stabilities of the laundry compositions of Examples 1-3 and Comparative Examples 7-8 are relatively strong, indicating that the components playing a role in stability are the narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, C10 isomeric alcohol ether 7EO and sodium fatty alcohol polyoxyethylene ether sulfate. From Examples 1 and Comparative Examples 1-6, it can be seen that high temperature and low temperature will affect the stability of the laundry composition. Sodium fatty alcohol polyoxyethylene ether sulfate can improve the stability of the laundry composition more than the narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture and C10 isomeric alcohol ether 7EO, and the combined use of the three has a more significant effect on enhancing stability.

[0047] (2)Viscosity Test 20 g of the laundry compositions of Examples 1-3 and Comparative Examples 1-8 were taken in beakers respectively, diluted 10 times and 30 times with hard water at 25°C and 250 ppm, and the viscosities before and after dilution were measured with a rotary viscometer at 25°C according to QB / T 1224-2012 "Liquid Detergent for Clothing". The average value was taken after repeating 3 times. The specific results are shown in Table 2.

[0048] As can be seen from Table 2, overall, the viscosities of the laundry compositions of Examples 1-3 are the highest at various dilution levels. By comparing Example 1 with Comparative Examples 1-6, it can be seen that the narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, C10 isomeric alcohol ether 7EO, and sodium lauryl ether sulfate are the main factors determining the viscosity, and the combined use of the three can increase the viscosity of the laundry composition. By comparing Example 1 with Comparative Examples 7-8, it can be seen that microencapsulation has no significant effect on the viscosity of the laundry composition.

[0049] (3)Foam performance The laundry compositions of Examples 1-3 and Comparative Examples 1-8 were diluted 30 times with 150 ppm hard water and then tested at a concentration of 0.3%. According to QB / T 7462-1994, using 150 ppm hard water, the foam height was measured using a Ross-Miles foam meter at 40 °C, and the foam heights at that time, after 5 min, and after 20 min were recorded. The average value was taken after repeating the test 3 times. The specific results are shown in Table 3.

[0050] As can be seen from the results in Table 3, the foam heights of Examples 1-3 are the highest and the persistence is the best, indicating that the formulations of the examples can improve the foam performance of the laundry composition. By comparing Example 1 with Comparative Examples 1-6, it can be seen that the combined use of the narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, C10 isomeric alcohol ether 7EO, and sodium lauryl ether sulfate can increase the foam height and duration of the laundry composition. By comparing Example 1 with Comparative Examples 7-8, it can be seen that microencapsulation has a limited effect on the foam performance of the laundry composition.

[0051] (4)Detergency performance The detergency performance of the laundry compositions of Examples 1-3 and Comparative Examples 1-8 was determined according to QBT1224-2012 "Liquid Detergents for Textile Fabrics". The laundry compositions were tested at a concentration of 0.1% (prepared as a solution with 250 ppm hard water). Each test had 4 parallels. The ratio of the detergency values of the laundry compositions for carbon black soiled cloth JB-01, JB-02 protein soiled cloth, and JB-03 sebum soiled cloth to the detergency value of the standard laundry detergent is shown in Table 4. During the washing process, 250 ppm hard water was used for washing.

[0052] The laundry compositions of Examples 1-3 and Comparative Examples 1-8 were diluted 30 times with 250 ppm hard water respectively, and then the detergency ability was determined according to QBT1224-2012. Each test had 4 parallels. The results are shown in Table 5.

[0053] As can be seen from Table 4-5, overall, the detergency of the laundry compositions of Examples 1-3 before and after dilution is better than that of the comparative examples, which is obvious in JB-02 and JB-03, indicating that the formulation design of the examples has significant advantages in detergency. From the comparison between Example 1 and Comparative Examples 1-6, although the narrow-distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, C10 isomeric alcohol ether 7EO, and sodium lauryl ether sulfate all have different degrees of detergency effects on carbon black, protein, and sebum, the detergency effects of the laundry compositions prepared by using them alone or in combination of two are not ideal compared with the combination of the three. From the comparison between Example 1 and Comparative Examples 7-8, it can be seen that the essential oil and bioenzyme without microencapsulation will reduce the detergency of the laundry composition.

[0054] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A highly concentrated environmentally friendly laundry composition, characterized in that, It comprises the following components in parts by weight: 15 - 35 parts of a narrow - distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, 5 - 15 parts of an isomeric alcohol ether, 5 - 15 parts of sodium lauryl ether sulfate, 0.5 - 1.5 parts of microcrystalline cellulose, 0.5 - 1.5 parts of micro - encapsulated plant essential oil, 2 - 5 parts of sodium citrate, 0.5 - 3 parts of tetrasodium glutamate diacetate, 0.5 - 1.5 parts of sodium polyaspartate, 0.05 - 0.15 parts of micro - encapsulated bio - enzyme, and 0.05 - 0.3 parts of a preservative.

2. The laundry composition according to claim 1, wherein In the narrow - distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, the weight ratio of AEO7 to AEO9 is 1 - 3:

1.

3. The laundry composition according to claim 1, wherein The isomeric alcohol ether is one or more of C10 isomeric alcohol ether 7EO, C10 isomeric alcohol ether 9EO, and isomeric tridecyl alcohol polyoxyethylene (5) ether.

4. The laundry composition according to claim 1, characterized in that, The preparation method of the micro - encapsulated plant essential oil includes: mixing the plant essential oil with polyethylene glycol, stirring and shearing, adding carboxymethyl chitosan for cross - linking, and centrifuging to obtain the micro - encapsulated plant essential oil.

5. The laundry composition according to claim 4, wherein The micro - encapsulated plant essential oil is one or more of lavender essential oil, chamomile essential oil, and neroli essential oil.

6. The laundry composition according to claim 1, wherein The preparation method of the micro - encapsulated bio - enzyme includes: mixing and emulsifying the bio - enzyme solution with sodium alginate solution, dropping it into calcium chloride solution for cross - linking to obtain microspheres, mixing with carboxymethyl chitosan solution, coating, and drying to obtain the micro - encapsulated bio - enzyme.

7. The laundry composition according to claim 6, wherein The bio - enzyme is one or more of protease, lipase, and mannanase.

8. The laundry composition according to claim 1, characterized in that, The preservative is 1,2 - hexanediol or anisic acid.

9. A method for preparing the laundry composition according to any one of claims 1-8, characterized in that, It includes: Mixing sodium citrate, tetrasodium glutamate diacetate, and sodium polyaspartate with water and heating to obtain a chelating system; heating and mixing the narrow - distribution fatty alcohol polyoxyethylene ether AEO7 / AEO9 mixture, isomeric alcohol ether, and sodium lauryl ether sulfate, adding them to the chelating system, stirring and shearing, adding the micro - encapsulated plant essential oil, micro - encapsulated bio - enzyme, microcrystalline cellulose, and preservative, and homogenizing to obtain the laundry composition.

10. The preparation method according to claim 9, wherein, The rotation speed of the stirring and shearing is 1500 - 2500 rpm, and the time is 6 - 10 min.

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