Environment-friendly efficient foam cleaning agent and preparation method thereof

Abstract

The invention relates to the technical field of chemical cleaning agents, in particular to an environment-friendly efficient foam cleaning agent and a preparation method thereof. The invention relates to an environment-friendly efficient foam cleaning agent which comprises a composite surfactant, a double-layer microcapsule bio-enzyme synergist, a multifunctional antibacterial additive, ethanol, sodium citrate, sodium bicarbonate, hydroxyethyl cellulose, a silicone foam stabilizer, benzalkonium chloride, D-limonene, modified polyether siloxane and a propellant. Through a biological enzyme slow release technology, an environment-friendly antibacterial system and a dynamic foam stabilizing design, the cleaning agent has the effects of efficient decontamination, avoidance of cleaning damage, low toxicity, especially suitability for low-volatilization-requirement scenes in automobile cabins and multiple functionalization.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical cleaning agents, and in particular to an environmentally friendly and efficient foam cleaning agent and a preparation method thereof. Background Art

[0002] Foam cleaners are cleaning products that form foam through a pressurized container or aerosol can. Through the synergistic action of a foaming agent and a surfactant, the cleaning ingredients adhere to the surface to be cleaned in the form of foam, extending contact time and enhancing the cleaning effect. In the automotive interior cleaning field, foam cleaners are primarily used to remove stains from materials such as fabric seats, ceilings, carpets, plastics, and leather. They offer strong penetrating properties, high cleaning efficiency, rapid evaporation, and minimal residue.

[0003] Despite widespread use in automotive cleaning, existing products still suffer from the following deficiencies: ① The inconsistency between cleaning power and material quality: Strong cleaning ingredients are often organic solvents, which can damage leather or plastic surfaces, causing fading or aging. Mild formulas, on the other hand, have limited cleaning power and struggle to remove stubborn oil and ink stains. ② Residue and secondary pollution: Some products evaporate, leaving sticky residue that absorbs dust, causing secondary pollution, or producing a pungent odor. ③ Environmental and health risks: Containing volatile organic compounds (VOCs) or irritating surfactants, such as sodium dodecylbenzenesulfonate, can pose a health risk to drivers and passengers over the long term and violate environmental regulations.

[0004] In view of the above-mentioned related technologies, this field urgently needs to develop a foam cleaning agent that can ensure efficient decontamination while achieving low damage, low toxicity and multifunctionality in the cleaning process. Summary of the Invention

[0005] In order to meet the requirements of foam cleaning agents for high-efficiency decontamination, avoiding cleaning damage and low toxicity, the present application provides an environmentally friendly and efficient foam cleaning agent and a preparation method thereof, which is suitable for low volatility requirements and multifunctional scenarios in automobile cabins.

[0006] In the first aspect, the present application provides an environmentally friendly and efficient foam cleaning agent, which adopts the following technical solutions: The invention discloses an environmentally friendly and efficient foam cleaning agent, which is prepared from the following raw materials in parts by weight: 55-65 parts of deionized water, 7-10 parts of a composite surfactant, 0.5-2 parts of a double-layer microcapsule bio-enzyme synergist, 0.5-2 parts of a multifunctional antibacterial additive, 1-3 parts of ethanol, 0.2-1 parts of sodium citrate, 0.1-0.8 parts of sodium bicarbonate, 0.1-0.5 parts of hydroxyethyl cellulose, 0.1-0.3 parts of a silicone foam stabilizer, 0.3-1 parts of benzalkonium chloride, 2-5 parts of D-limonene, 0.5-1.5 parts of a modified polyether siloxane, and 18-25 parts of a propellant.

[0007] By adopting the above scheme, the combination of composite surfactants, multifunctional antibacterial additives, benzalkonium chloride and D-limonene not only provides a broad-spectrum antibacterial effect, but also reduces chemical residues through the natural ingredient D-limonene, which is in line with the environmental protection trend; the combination of hydroxyethyl cellulose as a thickener, silicone foam stabilizer, modified polyether siloxane and propellant not only improves the foam durability, but also uses the polyether chain segments to quickly defoam under dynamic conditions to avoid secondary pollution; double-layer microcapsule encapsulation technology can protect the activity of biological enzymes, prolong their stability in cleaning agents, and achieve a sustained release effect; modified polyether siloxane forms a nano-scale hydrophobic layer after cleaning, which has both dust-proof and anti-static functions, reducing users' secondary maintenance operations; this solution is superior to mainstream products on the market in key indicators such as cleaning ability, material safety and environmental protection, and is particularly suitable for low-volatility scenarios in car cabins.

[0008] The invention discloses an environmentally friendly and efficient foam cleaning agent, which is prepared from the following raw materials in parts by weight: 58-62 parts of deionized water, 8-9 parts of a composite surfactant, 1-1.5 parts of a double-layer microcapsule bio-enzyme synergist, 1-1.5 parts of a multifunctional antibacterial additive, 1.5-2.5 parts of ethanol, 0.4-0.8 parts of sodium citrate, 0.3-0.6 parts of sodium bicarbonate, 0.2-0.4 parts of hydroxyethyl cellulose, 0.15-0.25 parts of a silicone foam stabilizer, 0.5-0.8 parts of benzalkonium chloride, 3-4 parts of D-limonene, 0.8-1.2 parts of a modified polyether siloxane, and 20-23 parts of a propellant.

[0009] Preferably, the composite surfactant is prepared from the following raw materials in parts by weight: 3-5 parts of cocamidopropyl betaine, 2-4 parts of non-alkyl glucoside, and 1-3 parts of sodium α-olefin sulfonate.

[0010] By adopting the above scheme, the composite surfactant quickly emulsifies grease and non-alkyl glucoside dirt through sodium α-olefin sulfonate, and the zwitterionic cocamidopropyl betaine reduces the surface tension of the material. The combination of the three types of surfactants achieves dynamic synergy of stain dissolution, stripping, and post-cleaning protection. Compared with traditional single surfactants, the cleaning efficiency of mixed stains of grease and particles is greatly improved.

[0011] Preferably, the double-layer microcapsule bio-enzyme synergist is prepared by first coating the enzyme solution and sodium alginate with an inner layer of sodium alginate microspheres, and then coating the outer layer with chitosan by electrostatic adsorption. The microcapsules are collected by centrifugation, washed three times with deionized water, and freeze-dried at -40 to -50°C for 18-24 hours to obtain a double-layer microcapsule bio-enzyme synergist.

[0012] By adopting the above solution, the biological enzyme is coated with sodium alginate-chitosan double-layer microcapsules to solve the problem of easy enzyme inactivation in liquid formulas. The enzyme activity retention rate is significantly improved after 6 months of storage at room temperature. Compared with the traditional direct addition of free enzymes, the problem of easy enzyme inactivation in a strong surfactant environment is solved.

[0013] Preferably, the inner layer of sodium alginate microspheres adopts the following technical solution: sodium alginate is mixed with an enzyme solution with a concentration of 5-15%, magnetically stirred at 30-50°C for 1-2 hours to form a uniform mixed solution, droplet control is achieved through a microfluidic device, and a coaxial needle with an inner diameter of 0.4 mm is used to drop the mixed solution into a 2% CaCl2 solution. The droplet diameter is controlled to be 200-300 μm, and the mixture is allowed to stand in the 2% CaCl2 solution for 30 minutes for cross-linking and curing to complete the inner layer encapsulation.

[0014] Preferably, the outer layer chitosan coating adopts the following technical scheme: sodium alginate microspheres are transferred to a 2% chitosan acetic acid solution, stirred at a low speed of 150-200 rpm for 20-30 minutes, and chitosan forms an outer layer membrane through electrostatic adsorption; then added to a 0.5% TPP solution, stirred at a low speed of 150-200 rpm for 15-20 minutes, and the anionic TPP and the chitosan cation are cross-linked to enhance the mechanical strength of the membrane.

[0015] Preferably, in the inner layer of sodium alginate microspheres, the mass ratio of sodium alginate to enzyme solution is 3:(6-8).

[0016] Preferably, the enzyme solution comprises three or more of lipase, protease, cellulase, amylase, hemicellulase, catalase and lysozyme.

[0017] Preferably, the enzyme solution comprises lipase, protease and lysozyme in a mass ratio of 1:(1-2):(1-2).

[0018] Preferably, the 2% chitosan solution is prepared by dissolving 2 parts of chitosan in 98 parts of 1% acetic acid solution, and adjusting the pH to 5.0-5.5 to avoid excessive swelling of the sodium alginate layer.

[0019] Preferably, the multifunctional antibacterial additive, the composite essential oil microcapsules and the silver ion-loaded zeolite are in a mass ratio of 1:(1-2).

[0020] The multifunctional antibacterial additive contains microcapsules with sustained-release compound essential oils to achieve long-lasting antibacterial effect. Combined with silver ion zeolite, it inhibits the growth of mold and replaces traditional chemical preservatives.

[0021] Preferably, the compound essential oil microcapsules adopt the following technical scheme: mixing a saturated β-cyclodextrin solution with the compound essential oil, stirring magnetically at 60-70° C. and 500-800 rpm for 4-6 hours, refrigerating at 4° C. for 12 hours to crystallize, filtering and freeze-drying.

[0022] Preferably, in the compound essential oil microcapsules, the mass ratio of the saturated β-cyclodextrin solution to the compound essential oil is 8:(1-2).

[0023] Preferably, the compound essential oil is tea tree essential oil, rosemary essential oil, lemongrass essential oil and bergamot essential oil in a mass ratio of (4-6):(2-3):(2-3):0.5.

[0024] Preferably, the tea tree essential oil has a purity of ≥98%; the rosemary essential oil has a eucalyptol content of ≥55% and a cinnamaldehyde content of ≥85%; the lemongrass essential oil has a citral content of ≥75%; and the bergamot essential oil has an ester content of ≥36%.

[0025] Preferably, the freeze drying: pre-freezing stage: -40°C to -80°C, ≥4h; primary drying: cold trap temperature ≤-50°C, vacuum degree 0.1-0.01mbar, starting temperature: -40°C, slowly warming to -20°C, maintaining for 24-36h, secondary drying: gradually warming to 25-30°C, vacuum degree maintained at 0.01-0.001mbar, 8-12h.

[0026] Preferably, the mass ratio of propane to n-butane in the propellant is (3-4):7.

[0027] In a second aspect, the present application provides a method for preparing an environmentally friendly and efficient foam cleaning agent, which adopts the following technical solution: S1: adding deionized water to a reactor, heating it to 40±2°C, adding sodium citrate and sodium bicarbonate in sequence, stirring at 180-220 rpm until completely dissolved, slowly adding hydroxyethyl cellulose, stirring at 400-500 rpm for 20-30 minutes to avoid agglomeration, and obtaining a premixed aqueous phase; S2 adds a composite surfactant to the premixed aqueous phase prepared in S1, uses a high shear emulsifier at 7000-9000 rpm for 5-10 minutes to form a uniform colloid, adds ethanol and D-limonene, and continues emulsification at 7000-9000 rpm for 5-10 minutes to obtain dispersion A; S3 dissolves the multifunctional antibacterial additive and benzalkonium chloride in the modified polyether silicone, mixes the mixture with the dispersion A prepared in S2, and magnetically stirs at 300-500 rpm for 15-25 minutes to complete emulsification. The mixture is cooled to 25°C, and a double-layer microcapsule bio-enzyme synergist is added. The mixture is stirred at a low speed of 80-150 rpm for 10-20 minutes to prevent the microcapsules from rupturing. A silicone foam stabilizer is added and stirred for 5-10 minutes to obtain dispersion B. S4: finely adjust the pH value of dispersion B to 6.5-7.5 with citric acid or sodium bicarbonate, pass through a homogenizer at 20-30 MPa, circulate 3 times, and refine the particle size to ≤50 μm to obtain a feed liquid; S5 filters the liquid prepared in S4 and puts it into an aerosol can, fills it with propellant, seals it, and then checks for leaks in a 50°C water bath for 30 minutes, and then labels and packages it.

[0028] By adopting the above scheme, through bio-enzyme sustained-release technology, environmentally friendly antibacterial system and dynamic foam stabilization design, the large-scale production requirements of foam cleaning agents with high efficiency and low environmental risks can be achieved.

[0029] In summary, this application has the following beneficial effects: 1. The environmentally friendly and efficient foam cleaning agent prepared in this application has the advantages of high decontamination efficiency, avoidance of cleaning damage, and low toxicity. It is especially suitable for low volatility requirements and multifunctional effects in car cabins.

[0030] 2. The environmentally friendly and efficient foam cleaning agent of the present application not only provides a broad-spectrum antibacterial effect through the compounding of composite surfactants, multifunctional antibacterial additives, benzalkonium chloride and D-limonene, but also reduces chemical residues through the natural ingredient D-limonene, which is in line with the environmental protection trend; the combination of hydroxyethyl cellulose, silicone foam stabilizer, modified polyether siloxane and propellant not only improves the foam durability, but also utilizes the polyether chain segment to quickly defoam under dynamic conditions to avoid secondary pollution.

[0031] 3. The environmentally friendly and efficient foam cleaning agent of the present application can protect the activity of biological enzymes, prolong their stability in the cleaning agent, and achieve a sustained release effect through double-layer microcapsule encapsulation technology; the modified polyether siloxane forms a nano-scale hydrophobic layer after cleaning, which has both dust-proof and anti-static functions, reducing the user's secondary maintenance operations.

[0032] 4. The preparation method of the environmentally friendly and efficient foam cleaning agent of the present application can achieve the large-scale production requirements of the foam cleaning agent with high efficiency and low environmental risk through the bio-enzyme sustained-release technology, environmentally friendly antibacterial system and dynamic foam stabilization design. DETAILED DESCRIPTION

[0033] The technical solution of the present application is further illustrated below through specific embodiments. The specific embodiments do not limit the scope of protection of the present application; some non-essential modifications and adjustments made by others based on the concept of the present application still fall within the scope of protection of the present application.

[0034] Unless otherwise specified, the experimental methods described in the following examples are conventional methods. The reagents and materials described are all commercially available products.

[0035] Silver ion loaded zeolite: Qieke New Material Technology Co., Ltd., particle size 5-10μm.

[0036] Silicone foam stabilizer: Zhejiang Xin'an Chemical Group Co., Ltd., H-360.

[0037] Modified polyether siloxane: Zhejiang Xin'an Chemical Industry Group Co., Ltd., H-3901.

[0038] The present application is further described in detail below with reference to the following examples and comparative examples.

[0039] The 1% acetic acid solution is prepared by diluting acetic acid with deionized water.

[0040] The 0.5% TPP solution: 5 g / L TPP powder is dissolved in deionized water. The saturated β-cyclodextrin solution is prepared by adding ≥1.85 g of β-cyclodextrin into distilled water at 60° C., cooling the solution to room temperature until it is completely dissolved, and filtering the precipitated crystals to ensure that the solution is saturated.

[0041] Preparation Example Preparation Example 1-3 Preparation of double-layer microcapsule enzyme synergist The double-layer microcapsule bio-enzyme synergist is prepared by first coating the enzyme solution and sodium alginate with an inner layer of sodium alginate microspheres, and then coating the outer layer with chitosan by electrostatic adsorption. The microcapsules are collected by centrifugation, washed three times with deionized water, and freeze-dried to obtain the double-layer microcapsule bio-enzyme synergist.

[0042] The inner layer of sodium alginate microspheres adopts the following technical solution: sodium alginate is mixed with an enzyme solution and magnetically stirred to form a uniform mixture. Droplet control is achieved through a microfluidic device. A coaxial needle with an inner diameter of 0.4 mm is used to drop the mixture into a 2% CaCl2 solution. The droplet diameter is controlled to be 200-300 μm. The droplet is allowed to stand in the 2% CaCl2 solution for 30 minutes for cross-linking and curing, completing the inner layer encapsulation.

[0043] Preferably, the outer layer chitosan coating adopts the following technical solution: sodium alginate microspheres are transferred to a 2% chitosan acetic acid solution, stirred at a low speed, and chitosan forms an outer layer membrane through electrostatic adsorption; then added to a 0.5% TPP solution, stirred at a low speed, and the anionic TPP and chitosan cations are cross-linked to enhance the mechanical strength of the membrane.

[0044] 2% chitosan solution: Dissolve 2g chitosan in 98mL 1% acetic acid solution and adjust the pH to 5.0-5.5 to avoid excessive swelling of the sodium alginate layer.

[0045] Double-layer microcapsule bio-enzyme enhancer was obtained by compounding in different ratios. The mass of each component is shown in Table 1.

[0046] Table 1 Proportions and dosages of components in preparation examples 1-3 of double-layer microcapsule bioenzyme enhancers Preparation Example 4-6 Preparation of multifunctional antibacterial additive The multifunctional antibacterial additive, the composite essential oil microcapsule and the silver ion-loaded zeolite are mixed in proportion.

[0047] The compound essential oil microcapsules adopt the following technical scheme: saturated beta-cyclodextrin solution is mixed with the compound essential oil, magnetically stirred, refrigerated at 4° C. for 12 hours for crystallization, filtered and then freeze-dried.

[0048] The compound essential oil, tea tree essential oil, rosemary essential oil, lemongrass essential oil and bergamot essential oil are mixed in proportion.

[0049] The quality of each component and process parameters are shown in Tables 2 and 3.

[0050] Table 2 Ratio of each component of the multifunctional antibacterial additives in Preparation Examples 4-6 Table 3 Amount (g) of each component and process parameters of the multifunctional antibacterial additives of Preparation Examples 4-6 Preparation Example 7 Preparation of composite surfactant The composite surfactant is obtained by mixing 40g of cocamidopropyl betaine, 30g of non-alkyl glucoside, and 20g of sodium α-olefin sulfonate.

[0051] Preparation Example 8 Preparation of composite surfactant The composite surfactant is obtained by mixing 30g of cocamidopropyl betaine, 20g of non-alkyl glucoside, and 10g of sodium α-olefin sulfonate.

[0052] Preparation Example 9 Preparation of composite surfactant The composite surfactant is obtained by mixing 50g of cocamidopropyl betaine, 40g of non-alkyl glucoside, and 30g of sodium α-olefin sulfonate.

[0053] Preparation Example 10 Preparation of Propellant The propellant is composed of 60g of propane and 140g of n-butane.

[0054] Preparation Example 11 Preparation of Propellant The propellant is composed of 80g of propane and 140g of n-butane. Example

[0055] Example 1 A method for preparing an environmentally friendly and efficient foam cleaning agent, the preparation method is as follows: S1: Add deionized water to the reactor, heat to 40±2°C, add sodium citrate and sodium bicarbonate in sequence, stir at 200 rpm until completely dissolved, slowly add hydroxyethyl cellulose, stir at 400 rpm for 20 minutes to avoid agglomeration, and obtain a premixed aqueous phase; S2 added a composite surfactant to the premixed aqueous phase prepared in S1, and used a high shear emulsifier at 8000 rpm for 10 min to form a uniform colloid, added ethanol and D-limonene, and continued emulsification at 8000 rpm for 10 min to obtain dispersion A; S3 dissolves the multifunctional antibacterial additive and benzalkonium chloride in the modified polyether silicone, mixes the mixture with the dispersion A prepared in S2, and stirs the mixture with a magnetic stirrer at 400 rpm for 20 minutes to complete emulsification. The mixture is cooled to 25°C, and a double-layer microcapsule bio-enzyme synergist is added. The mixture is stirred at a low speed of 100 rpm for 10 minutes to prevent the microcapsules from rupturing. A silicone foam stabilizer is added and stirred for 5 minutes to obtain dispersion B. S4 fine-tunes the pH value of dispersion B to 6.5-7.5 with citric acid or sodium bicarbonate, and the mixture is passed through a homogenizer at 30 MPa for 3 cycles to refine the particle size to ≤50 μm to obtain a feed liquid. S5 filters the liquid prepared in S4 and puts it into an aerosol can, fills it with propellant, seals it, and then checks for leaks in a 50°C water bath for 30 minutes, and then labels and packages it.

[0056] The environmentally friendly and efficient foam cleaning agent is prepared from the following raw materials: 80g of a composite surfactant, 12g of a double-layer microcapsule bio-enzyme synergist, 21g of ethanol, 7g of sodium citrate, 3.5g of sodium bicarbonate, 13g of a multifunctional antibacterial additive, 3g of hydroxyethyl cellulose, 2g of a silicone foam stabilizer, 6g of benzalkonium chloride, 34g of limonene, 10g of a modified polyether siloxane, 220g of a propellant, and 610g of deionized water.

[0057] Among them, the composite surfactant was prepared by the method of Preparation Example 7; the double-layer microcapsule enzyme synergist was prepared by the method of Preparation Example 1; the multifunctional antibacterial additive was prepared by the method of Preparation Example 4; and the propellant was prepared by the method of Preparation Example 10.

[0058] Example 2 A method for preparing an environmentally friendly and efficient foam cleaning agent, the preparation method is as follows: S1: Add deionized water to the reactor, heat to 40±2°C, add sodium citrate and sodium bicarbonate in sequence, stir at 180 rpm until completely dissolved, slowly add hydroxyethyl cellulose, stir at 400 rpm for 20 min to avoid agglomeration, and obtain a premixed aqueous phase; S2: Add the composite surfactant to the premixed aqueous phase prepared in S1, use a high shear emulsifier at 7000 rpm for 5 minutes to form a uniform colloid, add ethanol and D-limonene, and continue emulsification at 7000 rpm for 5 minutes to obtain dispersion A; S3 dissolved the multifunctional antibacterial additive and benzalkonium chloride in the modified polyether silicone, mixed with the dispersion A prepared in S2, and magnetically stirred at 300 rpm for 15 minutes to complete emulsification. The mixture was cooled to 25°C, and a double-layer microcapsule bio-enzyme synergist was added. The mixture was stirred at a low speed of 80 rpm for 10 minutes to prevent the microcapsules from rupturing. A silicone foam stabilizer was added and stirred for 5 minutes to obtain dispersion B. S4: finely adjust the pH value of dispersion B to 6.5-7.5 with citric acid or sodium bicarbonate, pass through a homogenizer at 20 MPa, circulate 3 times, and refine the particle size to ≤50 μm to obtain a feed liquid; S5 filters the liquid prepared in S4 and puts it into an aerosol can, fills it with propellant, seals it, and then checks for leaks in a 50°C water bath for 30 minutes, and then labels and packages it.

[0059] The environmentally friendly and efficient foam cleaning agent is prepared from the following raw materials: 70g of a composite surfactant, 5g of a double-layer microcapsule bio-enzyme synergist, 10g of ethanol, 2g of sodium citrate, 1g of sodium bicarbonate, 5g of a multifunctional antibacterial additive, 1g of hydroxyethyl cellulose, 1g of a silicone foam stabilizer, 3g of benzalkonium chloride, 20g of limonene, 5g of a modified polyether siloxane, 180g of a propellant, and 550g of deionized water.

[0060] Among them, the composite surfactant was prepared by the method of Preparation Example 8; the double-layer microcapsule enzyme synergist was prepared by the method of Preparation Example 2; the multifunctional antibacterial additive was prepared by the method of Preparation Example 5; and the propellant was prepared by the method of Preparation Example 11.

[0061] Example 3 A method for preparing an environmentally friendly and efficient foam cleaning agent, the preparation method is as follows: S1: Add deionized water to the reactor, heat to 40±2°C, add sodium citrate and sodium bicarbonate in sequence, stir at 220 rpm until completely dissolved, slowly add hydroxyethyl cellulose, stir at 500 rpm for 30 min to avoid agglomeration, and obtain a premixed aqueous phase; S2: Add the composite surfactant to the premixed aqueous phase prepared in S1, use a high shear emulsifier at 9000 rpm for 5 min to form a uniform colloid, add ethanol and D-limonene, and continue emulsification at 9000 rpm for 10 min to obtain dispersion A; S3 dissolves the multifunctional antibacterial additive and benzalkonium chloride in the modified polyether silicone, mixes the mixture with the dispersion A prepared in S2, and stirs the mixture with a magnetic stirrer at 500 rpm for 25 minutes to complete emulsification. The mixture is cooled to 25°C, and a double-layer microcapsule bio-enzyme synergist is added. The mixture is stirred at a low speed of 150 rpm for 20 minutes to prevent the microcapsules from rupturing. A silicone foam stabilizer is added and stirred for 10 minutes to obtain dispersion B. S4 fine-tunes the pH value of dispersion B to 6.5-7.5 with citric acid or sodium bicarbonate, and passes the mixture through a homogenizer at 30 MPa for 3 cycles to refine the particle size to ≤50 μm to obtain a feed liquid. S5 filters the liquid prepared in S4 and puts it into an aerosol can, fills it with propellant, seals it, and then checks for leaks in a 50°C water bath for 30 minutes, and then labels and packages it.

[0062] The environmentally friendly and efficient foam cleaning agent is prepared from the following raw materials: 80g of a composite surfactant, 10g of a double-layer microcapsule bio-enzyme synergist, 15g of ethanol, 4g of sodium citrate, 3g of sodium bicarbonate, 10g of a multifunctional antibacterial additive, 2g of hydroxyethyl cellulose, 1.5g of a silicone foam stabilizer, 5g of benzalkonium chloride, 30g of limonene, 8g of a modified polyether siloxane, 200g of a propellant, and 580g of deionized water.

[0063] Among them, the composite surfactant was prepared by the method of Preparation Example 9; the double-layer microcapsule enzyme synergist was prepared by the method of Preparation Example 3; the multifunctional antibacterial additive was prepared by the method of Preparation Example 6; and the propellant was prepared by the method of Preparation Example 10.

[0064] Example 4 A method for preparing an environmentally friendly and efficient foam cleaning agent, the preparation method is as follows: S1: Add deionized water to the reactor, heat to 40±2°C, add sodium citrate and sodium bicarbonate in sequence, stir at 210 rpm until completely dissolved, slowly add hydroxyethyl cellulose, stir at 450 rpm for 25 min to avoid agglomeration, and obtain a premixed aqueous phase; S2: Add the composite surfactant to the premixed aqueous phase prepared in S1, use a high shear emulsifier at 8000 rpm for 5 min to form a uniform colloid, add ethanol and D-limonene, and continue emulsification at 7000 rpm for 10 min to obtain dispersion A; S3 dissolved the multifunctional antibacterial additive and benzalkonium chloride in the modified polyether silicone, mixed with the dispersion A prepared in S2, and magnetically stirred at 400 rpm for 15 minutes to complete emulsification. The mixture was cooled to 25°C, and a double-layer microcapsule bio-enzyme synergist was added. The mixture was stirred at a low speed of 120 rpm for 10 minutes to prevent the microcapsules from rupturing. A silicone foam stabilizer was added and stirred for 5 minutes to obtain dispersion B. S4: fine-adjust the pH value of dispersion B to 6.5-7.5 with citric acid or sodium bicarbonate, pass through a homogenizer at 20 MPa, circulate 3 times, and refine the particle size to ≤50 μm to obtain a feed liquid; S5 filters the liquid prepared in S4 and puts it into an aerosol can, fills it with propellant, seals it, and then checks for leaks in a 50°C water bath for 30 minutes, and then labels and packages it.

[0065] The environmentally friendly and efficient foam cleaning agent is prepared from the following raw materials: 90g of a composite surfactant, 15g of a double-layer microcapsule bio-enzyme synergist, 25g of ethanol, 8g of sodium citrate, 6g of sodium bicarbonate, 15g of a multifunctional antibacterial additive, 4g of hydroxyethyl cellulose, 2.5g of a silicone foam stabilizer, 8g of benzalkonium chloride, 40g of limonene, 12g of a modified polyether siloxane, 230g of a propellant, and 620g of deionized water.

[0066] Among them, the composite surfactant was prepared by the method of Preparation Example 7; the double-layer microcapsule enzyme synergist was prepared by the method of Preparation Example 2; the multifunctional antibacterial additive was prepared by the method of Preparation Example 6; and the propellant was prepared by the method of Preparation Example 11.

[0067] Example 5 A method for preparing an environmentally friendly and efficient foam cleaning agent, the preparation method is as follows: S1: Add deionized water to the reactor, heat to 40±2°C, add sodium citrate and sodium bicarbonate in sequence, stir at 190 rpm until completely dissolved, slowly add hydroxyethyl cellulose, stir at 500 rpm for 20 min to avoid agglomeration, and obtain a premixed aqueous phase; S2: Add the composite surfactant to the premixed aqueous phase prepared in S1, use a high shear emulsifier at 7000 rpm for 10 min to form a uniform colloid, add ethanol and D-limonene, and continue emulsification at 9000 rpm for 5 min to obtain dispersion A; S3 dissolves the multifunctional antibacterial additive and benzalkonium chloride in the modified polyether silicone, mixes the mixture with the dispersion A prepared in S2, and stirs the mixture with a magnetic stirrer at 300 rpm for 25 minutes to complete emulsification. The mixture is cooled to 25°C, and a double-layer microcapsule bio-enzyme synergist is added. The mixture is stirred at a low speed of 100 rpm for 10 minutes to prevent the microcapsules from rupturing. A silicone foam stabilizer is added and stirred for 5 minutes to obtain dispersion B. S4 fine-tunes the pH value of dispersion B to 6.5-7.5 with citric acid or sodium bicarbonate, and the mixture is passed through a homogenizer at 20 MPa for 3 cycles to refine the particle size to ≤50 μm to obtain a feed liquid. S5 filters the liquid prepared in S4 and puts it into an aerosol can, fills it with propellant, seals it, and then checks for leaks in a 50°C water bath for 30 minutes, and then labels and packages it.

[0068] The environmentally friendly and efficient foam cleaning agent is prepared from the following raw materials: 100g of a composite surfactant, 20g of a double-layer microcapsule bio-enzyme synergist, 30g of ethanol, 10g of sodium citrate, 8g of sodium bicarbonate, 20g of a multifunctional antibacterial additive, 5g of hydroxyethyl cellulose, 3g of a silicone foam stabilizer, 10g of benzalkonium chloride, 50g of limonene, 15g of a modified polyether siloxane, 250g of a propellant, and 650g of deionized water.

[0069] Among them, the composite surfactant was prepared by the method of Preparation Example 8; the double-layer microcapsule enzyme synergist was prepared by the method of Preparation Example 1; the multifunctional antibacterial additive was prepared by the method of Preparation Example 5; and the propellant was prepared by the method of Preparation Example 10.

[0070] Example 6 The method is the same as Example 1, except that the enzyme solution for enhancing the synergy of the double-layer microcapsule biological enzyme is a mixture of lipase, protease and cellulase in a mass ratio of 1:1:1.

[0071] Example 7 The method is the same as Example 1, except that the enzyme solution for enhancing the synergy of the double-layer microcapsule biological enzyme is a mixture of amylase, protease and catalase in a mass ratio of 1:1:1.

[0072] Example 8 The method is the same as Example 1, except that the enzyme solution for enhancing the synergy of the double-layer microcapsule biological enzyme is a mixture of lysozyme, lipase and catalase in a mass ratio of 1:1:1.

[0073] Comparative Example Comparative Example 1 The same as Example 1, except that the composite surfactant is 30 g of sodium dodecylbenzenesulfonate and 20 g of fatty alcohol polyoxyethylene ether.

[0074] Comparative Example 2 The same as Example 1, except that the composite surfactant is replaced by 70 g of sodium lauryl sulfate.

[0075] Comparative Example 3 The same as Example 1, except that the enzyme solution enhanced by the double-layer microcapsule biological enzyme is replaced by one not encapsulated by double-layer microcapsules, and the enzyme solution is a mixture of lipase, protease and lysozyme in a mass ratio of 1:1:1.

[0076] Comparative Example 4 The same as Example 1, except that the double-layer microcapsule biological enzyme synergist is replaced by an enzyme solution not encapsulated by double-layer microcapsules, and the enzyme solution is a mixture of amylase, protease and catalase in a mass ratio of 1:1:1.

[0077] Comparative Example 5 The same as Example 1, except that the multifunctional antibacterial additive is not added.

[0078] Comparative Example 6 The same as Example 1, except that, in the multifunctional antibacterial additive, the amount of the composite essential oil microcapsules added is 10 g, and the amount of the silver ion-loaded zeolite added is 30 g; the compound essential oil in the composite essential oil microcapsules is tea tree essential oil and rosemary essential oil mixed in a mass ratio of 1:2 to prepare microcapsules.

[0079] Comparative Example 7 The same as Example 1, except that the propellant is replaced by a mixture of propane and n-butane in a mass ratio of 3:8, and the propellant added is 200g.

[0080] Comparative Example 8 The same as Example 1, except that the propellant is replaced by tetrafluoropropylene in an amount of 200 g.

[0081] Comparative Example 9 The same as Example 1, except that the environmentally friendly and efficient foam cleaning agent is prepared by including the following raw materials: 60g composite surfactant, 25g double-layer microcapsule enzyme synergist, 35g ethanol, 10g sodium citrate, 5g sodium bicarbonate, 4g multifunctional antibacterial additive, 6g hydroxyethyl cellulose, 3g silicone foam stabilizer, 6g benzalkonium chloride, 55g limonene, 12g modified polyether siloxane, 150g propellant, and 700g deionized water.

[0082] Comparative Example 10 The same as Example 1, except that the environmentally friendly and efficient foam cleaning agent is prepared by including the following raw materials: 100g composite surfactant, 4g double-layer microcapsule enzyme synergist, 20g ethanol, 15g sodium citrate, 10g sodium bicarbonate, 22g multifunctional antibacterial additive, 0.5g hydroxyethyl cellulose, 4g silicone foam stabilizer, 7g benzalkonium chloride, 45g limonene, 18g modified polyether siloxane, 200g propellant, and 700g deionized water.

[0083] Performance testing 1. Cleaning power test and results The test method refers to GB / T 35833-2018. Use a syringe to evenly apply 0.1mL of stain to the substrate, with an area of ​​5cm×5cm. Dry at room temperature for 24 hours. Place the coated sample in a 40℃, 80% RH environment for 48 hours to enhance the adhesion of the stain. Add the foam detergent at 0.1g / cm 2Spray on the stained area; cover with cotton cloth, start the friction machine and run it 20 times, remove the cotton cloth, and after drying, observe and evaluate the removal rate of coffee stains, grease, carbon powder, apple juice, and milk stains.

[0084] The cleaning power test results of the environmentally friendly and efficient foam cleaning agents prepared by Examples 1-8 and Comparative Examples 1-10 are shown in Table 4.

[0085] Table 4 Determination results of cleaning power The above test results show that the average cleaning power of Examples 1-8 ranges from 97.6% to 99.1%, with Example 1 having the best average cleaning power of 99.1%. The average cleaning power of Comparative Examples 1-10 ranges from 72.8% to 86.9%, which is relatively poor. For coffee stains, which are mainly tannic acid and pigment deposits, limonene and protease in Examples 1-8 synergistically decompose tannic acid, achieving a high cleaning and decomposition effect. Grease mainly simulates motor oil or animal fat. Examples 1-8 use sodium α-olefin sulfonate and lipase in combination to achieve dual-path cleaning of grease emulsification and enzymatic hydrolysis. Carbon powder stains are mainly particulate stains. In Examples 1-8, hydroxyethyl cellulose and silicone foam stabilizers extend the foam contact time and enhance the physical wrapping effect. Apple juice is mainly sugars and pigments, and the surfactants and complex enzymes in the examples can achieve a good cleaning effect.

[0086] 2. Foam stability test: The test method refers to GB / T 13173-2021. Spray 10g of the environmentally friendly and efficient foam cleaning agent into a measuring cylinder, place it in an incubator at 25℃, 35℃, and 45℃ for 5 minutes, and observe the retention rate.

[0087] The foam stability of the environmentally friendly and efficient foam cleaning agents prepared by Examples 1-8 and Comparative Examples 1-10 was measured, and the results are shown in Table 5.

[0088] Table 5 Stability test results The above test results show that the average stability range of Examples 1-8 is 94.0%-95.7%, with the average stability of Example 1 being the best at 95.7%. The average stability range of Comparative Examples 1-10 is 72.0%-86.6%. Examples 1-8 have significantly better temperature stability than Comparative Examples 1-10, and have a lower high-temperature attenuation rate. The environmentally friendly and efficient foam cleaning agent prepared in Examples 1-8, using hydroxyethyl cellulose as a thickener, silicone foam stabilizer, modified polyether siloxane, and propellant, effectively improves foam durability.

[0089] 3. Antibacterial test The test method refers to GB 27948-2020. Frozen Escherichia coli and Staphylococcus aureus were inoculated into the culture medium and cultured at 37°C for 24 hours. The culture medium was diluted to 1×10 8 CFU / mL, 100 μL of bacterial solution was evenly applied on the surface of automotive interior materials, such as PVC, leather, and fabric, and dried at room temperature for 1 hour; 2 Spray the used amount evenly on the contaminated carrier, let it stand for 10 minutes, scrape the treated area with a cotton swab, and test the sterilization rate of Escherichia coli and Staphylococcus aureus.

[0090] The antibacterial test results of the environmentally friendly and efficient foam cleaning agents prepared by Examples 1-8 and Comparative Examples 1-10 are shown in Table 6.

[0091] Table 6 Antibacterial test results As can be seen from Table 8, Examples 1-8 can achieve a sterilization rate of 99.99% for all materials including PVC, leather, and fabric, significantly exceeding Comparative Examples 1-10. The sterilization rates of Comparative Examples 7-10 are between 94.65% and 97.06%, and the sterilization effects on Escherichia coli and Staphylococcus aureus are significantly higher than those of Comparative Examples 1-6. The components and ratios of the composite surfactant, double-layer microcapsule bio-enzyme enhancer, and multifunctional antibacterial additive in Comparative Examples 1-6 are significantly different from those in Examples 1-8. The results of the antibacterial test show that the lack of a composite enzyme preparation, the enzyme preparation without double-layer microcapsule coating, the single antibacterial component, and the incomplete surfactant ratio cannot effectively kill microorganisms on various materials in the vehicle.

[0092] From the above test results, it can be seen that the environmentally friendly and efficient foam cleaning agent prepared in this application not only provides a broad-spectrum antibacterial effect through the compounding of composite surfactants, multifunctional antibacterial additives, benzalkonium chloride and D-limonene, but also reduces chemical residues through the natural ingredient D-limonene, which is in line with the environmental protection trend; the combination of hydroxyethyl cellulose as a thickener, silicone foam stabilizer, modified polyether siloxane and propellant not only improves the foam durability, but also utilizes the polyether chain segment to quickly defoam under dynamic conditions to avoid secondary pollution; double-layer microcapsule encapsulation technology can protect the activity of biological enzymes, prolong their stability in the cleaning agent, and achieve a sustained release effect; modified polyether siloxane forms a nano-scale hydrophobic layer after cleaning, which has both dust-proof and anti-static functions, reducing users' secondary maintenance operations; this solution is superior to mainstream products on the market in key indicators such as cleaning ability, material safety and environmental protection, and is especially suitable for low-volatility requirements in car cabins.

[0093] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as they are within the scope of the present invention, they are protected by patent law.

Claims

1. An environmentally friendly and efficient foam cleaning agent, characterized in that: The invention comprises the following raw materials in parts by weight: 55-65 parts of deionized water, 7-10 parts of composite surfactant, 0.5-2 parts of double-layer microcapsule bio-enzyme synergist, 0.5-2 parts of multifunctional antibacterial additive, 1-3 parts of ethanol, 0.2-1 parts of sodium citrate, 0.1-0.8 parts of sodium bicarbonate, 0.1-0.5 parts of hydroxyethyl cellulose, 0.1-0.3 parts of silicone foam stabilizer, 0.3-1 parts of benzalkonium chloride, 2-5 parts of D-limonene, 0.5-1.5 parts of modified polyether siloxane and 18-25 parts of propellant.

2. The environmentally friendly and efficient foam cleaning agent according to claim 1, characterized in that: The composite surfactant is prepared from the following raw materials in parts by weight: 3-5 parts of cocamidopropyl betaine, 2-4 parts of non-alkyl glucoside, and 1-3 parts of sodium α-olefin sulfonate.

3. The environmentally friendly and efficient foam cleaning agent according to claim 1, characterized in that: The double-layer microcapsule bio-enzyme synergist is prepared by first coating the enzyme solution and sodium alginate with an inner layer of sodium alginate microspheres, then coating the outer layer with chitosan by electrostatic adsorption, collecting the microcapsules by centrifugation, washing them three times with deionized water, and freeze-drying them at -40 to -50°C for 18-24 hours.

4. The environmentally friendly and efficient foam cleaning agent according to claim 3, characterized in that: The inner layer sodium alginate microspheres adopt the following technical solution: sodium alginate is mixed with an enzyme solution with a concentration of 5-15%, and magnetic stirring is performed at 30-50°C for 1-2 hours to form a uniform mixed solution. Droplet control is achieved through a microfluidic device. A coaxial needle with an inner diameter of 0.4 mm is used to drop the mixed solution into a 2% CaCl2 solution. The droplet diameter is controlled to be 200-300 μm. The droplet is allowed to stand in the 2% CaCl2 solution for 30 minutes for cross-linking and curing, completing the inner layer encapsulation.

5. The environmentally friendly and efficient foam cleaning agent according to claim 3, characterized in that: The outer layer chitosan coating adopts the following technical solution: the inner layer sodium alginate microspheres are transferred to a 2% chitosan acetic acid solution, stirred at a low speed of 150-200 rpm for 20-30 minutes, and the chitosan forms an outer layer membrane through electrostatic adsorption; then added to a 0.5% TPP solution, stirred at a low speed of 150-200 rpm for 15-20 minutes, and the anionic TPP and the chitosan cation are cross-linked to enhance the mechanical strength of the membrane.

6. The environmentally friendly and efficient foam cleaning agent according to claim 1, characterized in that: The multifunctional antibacterial additive, the composite essential oil microcapsule and the silver ion loaded zeolite are in a mass ratio of 1:(1-2).

7. The environmentally friendly and efficient foam cleaning agent according to claim 6, characterized in that: The compound essential oil microcapsules adopt the following technical scheme: saturated beta-cyclodextrin solution is mixed with the compound essential oil, magnetically stirred at 60-70°C and 500-800rpm for 4-6 hours, refrigerated at 4°C for 12 hours for crystallization, filtered and then freeze-dried.

8. The environmentally friendly and efficient foam cleaning agent according to claim 7, characterized in that: The compound essential oil comprises tea tree essential oil, rosemary essential oil, lemongrass essential oil and bergamot essential oil in a mass ratio of (4-6): (2-3): (2-3): 0.

5.

9. The environmentally friendly and efficient foam cleaning agent according to claim 1, characterized in that: The mass ratio of propane to n-butane in the propellant is (3-4):

7.

10. A method for preparing the environmentally friendly and efficient foam cleaning agent according to any one of claims 1 to 9, characterized in that: It includes the following steps: S1: Add deionized water to the reactor, heat to 40±2°C, add sodium citrate and sodium bicarbonate in sequence, stir at 180-220 rpm until completely dissolved, slowly add hydroxyethyl cellulose, stir at 400-500 rpm for 20-30 minutes to avoid agglomeration, and obtain a premixed aqueous phase; S2: Add the composite surfactant to the premixed aqueous phase prepared in S1, use a high shear emulsifier at 7000-9000 rpm for 5-10 minutes to form a uniform colloid, add ethanol and D-limonene, and continue emulsification at 7000-9000 rpm for 5-10 minutes to obtain dispersion A; S3: Dissolve the multifunctional antibacterial additive and benzalkonium chloride in the modified polyether silicone, mix with the dispersion A prepared in S2, and stir magnetically at 300-500 rpm for 15-25 minutes to complete emulsification. Cool to 25°C, add the double-layer microcapsule bio-enzyme synergist, and stir at a low speed of 80-150 rpm for 10-20 minutes to prevent the microcapsules from rupturing. Add the silicone foam stabilizer and stir for 5-10 minutes to obtain dispersion B. S4: Finely adjust the pH value of dispersion B to 6.5-7.5 with citric acid or sodium bicarbonate, pass through a homogenizer at 20-30 MPa, circulate 3 times, and refine the particle size to ≤50 μm to obtain a feed solution; S5: Filter the liquid prepared in S4 and put it into the aerosol can, fill it with propellant, seal it, and test for leaks in a 50℃ water bath for 30 minutes, then label and package it.

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