Environment-friendly green oil stripping agent and preparation method thereof

Abstract

The invention discloses an environment-friendly green oil stripping agent which comprises the following substances in parts by mass: 8-15 parts of a plant-derived surfactant, 5-12 parts of a zwitterionic surfactant, 0-3 parts of a biological enzyme preparation, 1.5-5 parts of a stabilizer, 0.1-2 parts of a pH regulator, 1-3 parts of a corrosion inhibitor and 70-100 parts of deionized water. The preparation method of the environment-friendly green oil stripping agent comprises the following steps: S1, uniformly mixing the plant-derived surfactant; s2, adding a zwitterionic surfactant into the mixture obtained in the step S1, and ultrasonically mixing uniformly; s3, other components are added into deionized water, then the mixture obtained in the step S2 is added, the mixture is stirred and mixed to be uniform, subpackaging is conducted, and the product is obtained. The environment-friendly green oil stripping agent prepared by the invention has the advantages that the copper corrosion rate is low, the stripping time is not longer than 3 minutes, the green oil stripping efficiency is greater than 97%, the adopted raw materials are green and environment-friendly, and the environment-friendly green oil stripping agent has a very good application value.

Description

Technical Field

[0001] The invention relates to the technical field of stripping agents, in particular to an environmentally friendly green oil stripping agent and a preparation method thereof. Background Art

[0002] Green oil strippers are chemical agents specifically designed to remove grease, oil, and other organic contaminants. They are widely used in industrial cleaning, manufacturing maintenance, and environmental protection. Their main ingredients include surfactants, solvents, and additives, effectively removing oil contaminants through physical or chemical action. For example, in automotive manufacturing, green oil strippers are used to clean engine parts; in the food processing industry, they are used to degrease equipment surfaces to ensure hygiene and safety; and in the printed circuit board (PCB) industry, they are used to remove solder mask.

[0003] The main categories are as follows: (1) Solvent type: It relies on solvents such as alcohols and ketones to dissolve grease. It has high decontamination efficiency but has the problems of flammability and toxicity.

[0004] (2) Non-solvent type: mainly based on surfactants (such as sodium alkylbenzene sulfonate), which is more environmentally friendly but slightly less efficient.

[0005] The main technical issues with green oil strippers currently on the market are: 1. Poor environmental friendliness, severe substrate corrosion, and low treatment efficiency. Future development directions for green oil strippers are environmentally friendly, highly efficient, and multifunctional.

[0006] CN116904060B discloses an environmentally friendly green oil stripper for pores, and its preparation and use methods. The stripper comprises the following ingredients: a main agent concentration range of 10-100 g / L; a softener concentration range of 0.2-60 g / L; a wetting and penetrant concentration range of 0.1-50 g / L; an auxiliary agent concentration range of 0.5-70 g / L; an organic weak base is selected as the main agent; and an inorganic ion complexing agent is selected as the auxiliary agent. The present invention can remove green oil in pores within 20 minutes under the temperature conditions of 40-50°C and excluding 50°C, and is combined with ultrasound. Compared with other green oil strippers for pores, it takes less time to remove green oil and uses lower temperatures. At the same time, there is no need for a pre-soaking step like in conventional green oil removal processes. The present invention can usually proceed to the stripping step directly after water washing. However, the environmental performance is not very friendly, and the application scenarios are limited. Summary of the Invention

[0007] The object of the present invention is to provide an environmentally friendly green oil stripping agent comprising the following substances in parts by weight: 8-15 parts of plant-derived surfactant 5-12 parts of zwitterionic surfactant 0~3 parts of biological enzyme preparation 1.5~5 parts of stabilizer pH regulator 0.1~2 parts 1~3 parts of corrosion inhibitor 70~100 parts of deionized water.

[0008] Furthermore, the environmentally friendly green oil stripper contains 0.1 to 0.3 parts of amino-modified water-soluble CdSe / ZnS quantum dots. The amino-modified water-soluble CdSe / ZnS quantum dots come from Xi'an Qiyue Biotechnology Co., Ltd. The amino-modified water-soluble CdSe / ZnS quantum dots can form a covalent bond with the biological enzyme, that is, the amino group and the carboxyl group on the enzyme surface form an amide bond. At the same time, as a light-responsive catalytic unit, when exposed to a 450nm LED light source, the quantum dots generate electron-hole pairs, accelerating the reduction and regeneration of the lipase active center. At the same time, the holes oxidatively decompose the benzoxazine cross-linked structure in the green oil, thereby improving the removal rate.

[0009] Furthermore, the plant-derived surfactant is a mixture of tea saponin and alkyl glycoside, the mass ratio of tea saponin to alkyl glycoside is (1-3):1, and the mixture can destroy the binding energy of the green oil-substrate interface, so that the green oil can be removed from the base more easily.

[0010] Furthermore, the bioenzyme preparation is a mixture of lipolytic enzyme and cellulase, and the mass ratio of lipolytic enzyme to cellulase is (2~3):1. The bioenzyme preparation specifically decomposes the ester cross-linked structure in green oil and accelerates the removal rate. The lipolytic enzyme and cellulase are loaded on a mesoporous SiO2 carrier through a co-immobilization method. The mesoporous carrier significantly improves the thermal stability of the enzyme and increases the service life of the final product.

[0011] Furthermore, the zwitterionic surfactant is a mixture of cocamidopropyl betaine and lauryl hydroxysulfonyl betaine, and the mass ratio of cocamidopropyl betaine to lauryl hydroxysulfonyl betaine is 1:1. When the mixture is used, its critical micelle concentration is reduced by more than 35% compared with a single component, and at the same time, it cooperates with the corrosion inhibitor to reduce the corrosion current density and inhibit metal corrosion.

[0012] Furthermore, the stabilizer is hydroxypropyl-β-cyclodextrin. After adding the stabilizer, the enzyme activity retention rate of the biological enzyme preparation in the product can still be greater than 85% after 28 days.

[0013] Furthermore, the corrosion inhibitor is sodium phytate, and the pH adjuster is malic acid. Sodium phytate can form a molecular adsorption layer with a thickness of 2.3 to 3.5 nm on the metal surface to reduce metal corrosion. At the same time, sodium phytate and malic acid form a buffer solution system to adjust the pH value of the solution, achieving unexpected technical effects.

[0014] The present invention also provides a method for preparing the above-mentioned environmentally friendly green oil stripping agent, comprising the following steps: S1. Mix the plant-derived surfactants evenly; S2. The zwitterionic surfactant is then added to the mixture obtained in step S1 and ultrasonically mixed; S3. Add the bio-enzyme preparation, stabilizer, pH adjuster, corrosion inhibitor, and amino-modified water-soluble CdSe / ZnS quantum dots to deionized water in sequence, and then add the mixture obtained in step S2, stir and mix evenly, and divide into packages to obtain an environmentally friendly green oil stripping agent.

[0015] The present invention also provides a method for using the above-mentioned environmentally friendly green oil stripping agent, which is heated to a treatment temperature of 30-40°C and sprayed onto the substrate to be treated for 2-5 minutes. During the treatment process, light of 450±10nm is applied.

[0016] The environmentally friendly green oil stripping agent prepared by the present invention has a low copper corrosion rate, a stripping time step of no more than 3 minutes, a green oil stripping efficiency of more than 97%, uses green and environmentally friendly raw materials, and has good application value. DETAILED DESCRIPTION

[0017] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] Example 1

[0019] An environmentally friendly green oil stripping agent comprises the following substances in parts by weight: Tea saponin 5g Alkyl sugar 5g Cocamidopropyl Betaine 4g Lauryl Hydroxysulfobetaine 4g 2g of biological enzyme preparation Hydroxypropyl-β-cyclodextrin 3g Malic acid 0.2g Sodium phytate 2g 80g of deionized water.

[0020] The biological enzyme preparation is lipolytic enzyme and cellulase loaded on a mesoporous SiO2 carrier through a co-immobilization method.

[0021] The preparation method of the above-mentioned environmentally friendly green oil stripping agent comprises the following steps: S1. Mix tea saponin and alkyl sugars evenly; S2. Cocamidopropyl betaine and lauryl hydroxysulfobetaine were then added to the mixture obtained in step S1 and ultrasonically mixed; S3. The bio-enzyme preparation, hydroxypropyl-β-cyclodextrin, malic acid, and sodium phytate are sequentially added to deionized water, and then the mixture obtained in step S2 is added, stirred and mixed evenly, and packaged to obtain an environmentally friendly green oil stripping agent.

[0022] The method for using the above-mentioned environmentally friendly green oil stripping agent is to heat the environmentally friendly green oil stripping agent to a treatment temperature of 30-40°C and spray it onto the substrate to be treated for 2.5 minutes.

[0023] Example 2

[0024] An environmentally friendly green oil stripping agent comprises the following substances in parts by weight: Tea saponin 5g Alkyl sugar 5g Cocamidopropyl Betaine 4g Lauryl Hydroxysulfobetaine 4g Bioenzyme preparation 0g Hydroxypropyl-β-cyclodextrin 3g Malic acid 0.2g Sodium phytate 2g 80g of deionized water.

[0025] The biological enzyme preparation is lipolytic enzyme and cellulase loaded on a mesoporous SiO2 carrier through a co-immobilization method.

[0026] The preparation method of the above-mentioned environmentally friendly green oil stripping agent comprises the following steps: S1. Mix tea saponin and alkyl sugars evenly; S2. Cocamidopropyl betaine and lauryl hydroxysulfobetaine were then added to the mixture obtained in step S1 and ultrasonically mixed; S3. The bio-enzyme preparation, hydroxypropyl-β-cyclodextrin, malic acid, and sodium phytate are sequentially added to deionized water, and then the mixture obtained in step S2 is added, stirred and mixed evenly, and packaged to obtain an environmentally friendly green oil stripping agent.

[0027] The method for using the above-mentioned environmentally friendly green oil stripping agent is to heat the environmentally friendly green oil stripping agent to a treatment temperature of 30-40°C and spray it onto the substrate to be treated for 3 minutes.

[0028] Example 3

[0029] An environmentally friendly green oil stripping agent comprises the following substances in parts by weight: Tea saponin 5g Alkyl sugar 5g Cocamidopropyl Betaine 4g Lauryl Hydroxysulfobetaine 4g 2g of biological enzyme preparation Hydroxypropyl-β-cyclodextrin 3g Malic acid 0.2g Sodium phytate 2g Amino-modified water-soluble CdSe / ZnS quantum dots 0.2g 80g of deionized water.

[0030] The biological enzyme preparation is lipolytic enzyme and cellulase loaded on a mesoporous SiO2 carrier through a co-immobilization method.

[0031] The preparation method of the above-mentioned environmentally friendly green oil stripping agent comprises the following steps: S1. Mix tea saponin and alkyl sugars evenly; S2. Cocamidopropyl betaine and lauryl hydroxysulfobetaine were then added to the mixture obtained in step S1 and ultrasonically mixed; S3. Add the bioenzyme preparation, hydroxypropyl-β-cyclodextrin, malic acid, sodium phytate, and amino-modified water-soluble CdSe / ZnS quantum dots to deionized water in sequence, and then add the mixture obtained in step S2, stir and mix evenly, and divide into packages to obtain an environmentally friendly green oil stripping agent.

[0032] The method for using the above-mentioned environmentally friendly green oil stripping agent is to heat the environmentally friendly green oil stripping agent to a treatment temperature of 30~40℃, spray it onto the substrate to be treated, and treat it for 2 minutes. During the treatment process, light with a wavelength of 450±10nm is applied.

[0033] Example 4

[0034] An environmentally friendly green oil stripping agent comprises the following substances in parts by weight: Tea saponin 5g Alkyl sugar 5g Cocamidopropyl Betaine 4g Lauryl Hydroxysulfobetaine 4g 2g of biological enzyme preparation Hydroxypropyl-β-cyclodextrin 3g Malic acid 0.2g Sodium phytate 2g Amino-modified water-soluble CdSe / ZnS quantum dots 0.2g 80g of deionized water.

[0035] The biological enzyme preparation is lipolytic enzyme and cellulase loaded on a mesoporous SiO2 carrier through a co-immobilization method.

[0036] The preparation method of the above-mentioned environmentally friendly green oil stripping agent comprises the following steps: S1. Mix tea saponin and alkyl sugars evenly; S2. Cocamidopropyl betaine and lauryl hydroxysulfobetaine were then added to the mixture obtained in step S1 and ultrasonically mixed; S3. Add the bioenzyme preparation, hydroxypropyl-β-cyclodextrin, malic acid, sodium phytate, and amino-modified water-soluble CdSe / ZnS quantum dots to deionized water in sequence, and then add the mixture obtained in step S2, stir and mix evenly, and divide into packages to obtain an environmentally friendly green oil stripping agent.

[0037] The method for using the above-mentioned environmentally friendly green oil stripping agent is to heat the environmentally friendly green oil stripping agent to a treatment temperature of 30-40°C and spray it onto the substrate to be treated for 2.5 minutes.

[0038] Comparative Example 1 The tea saponin 5g and alkyl sugar 5g components in Example 2 were replaced with tea saponin 10g, and the treatment time was changed to 5min. The rest was the same as in Example 2 and will not be repeated here.

[0039] Comparative Example 2 The components of cocamidopropyl betaine 4g and lauryl hydroxysulfonyl betaine 4g in Example 2 were replaced by cocamidopropyl betaine 8g, and the treatment time was changed to 5min. Other details were the same as in Example 2 and will not be repeated here.

[0040] Comparative Example 3 The corrosion inhibitor component in Example 2 was removed, and the rest was the same as in Example 2, which will not be described in detail.

[0041] Comparative Example 4 The corrosion inhibitor component in Example 2 was changed to benzotriazole, and the rest was the same as in Example 2, which will not be repeated here.

[0042] The environmentally friendly green oil stripping agents prepared in the examples and comparative examples were applied to remove green oil from PCB boards, and performance tests were conducted. The application results are shown in Table 1.

[0043] Table 1

[0044] The test data from Examples 1 to 3 show that the environmentally friendly green oil stripper prepared by the present invention has a low copper corrosion rate, a stripping time step of no more than 3 minutes, and a green oil stripping efficiency greater than 97%. A comparison of the data from Examples 1 and 2 shows that the addition of a bioenzyme preparation increases the green oil stripping efficiency and shortens the stripping time. A comparison of the data from Examples 1 and 3 shows that the addition of amino-modified water-soluble CdSe / ZnS quantum dots and light irradiation further improves the green oil stripping efficiency and shortens the stripping time. A comparison of the data from Examples 3 and 4 shows that the optimal technical effect can only be achieved when amino-modified water-soluble CdSe / ZnS quantum dots and light irradiation are used simultaneously. The data from Comparative Examples 1 and 2 show that a two-component plant-derived surfactant and a two-component zwitterionic surfactant have better technical effects because the two-component mixture exerts a synergistic effect, resulting in a better technical effect. The data from Comparative Examples 3 and 4 show that the specific corrosion inhibitor of the present invention can significantly reduce the copper corrosion rate because benzotriazole cannot form a buffer system with malic acid, affecting the technical effect.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly green oil stripping agent, characterized in that, Includes the following substances in parts by mass: 8-15 parts of plant-derived surfactant 5-12 parts of zwitterionic surfactant 0~3 parts of biological enzyme preparation 1.5~5 parts of stabilizer pH regulator 0.1~2 parts 1~3 parts of corrosion inhibitor 70~100 parts of deionized water.

2. The environmentally friendly green oil stripping agent according to claim 1, characterized in that The environmentally friendly green oil stripping agent contains 0.1 to 0.3 parts of amino-modified water-soluble CdSe / ZnS quantum dots.

3. The environmentally friendly green oil stripping agent according to claim 1, characterized in that The plant-derived surfactant is a mixture of tea saponin and alkyl glycoside, and the mass ratio of tea saponin to alkyl glycoside is (1-3):

1.

4. The environmentally friendly green oil stripping agent according to claim 1, characterized in that The biological enzyme preparation is a mixture of lipolytic enzyme and cellulase, and the mass ratio of lipolytic enzyme to cellulase is (2-3):

1.

5. The environmentally friendly green oil stripping agent according to claim 1, characterized in that The zwitterionic surfactant is a mixture of cocamidopropyl betaine and lauryl hydroxysulfonyl betaine, and the mass ratio of cocamidopropyl betaine to lauryl hydroxysulfonyl betaine is 1:

1.

6. The environmentally friendly green oil stripping agent according to claim 1, characterized in that The stabilizer is hydroxypropyl-β-cyclodextrin.

7. The environmentally friendly green oil stripping agent according to claim 1, characterized in that: The corrosion inhibitor is sodium phytate, and the pH regulator is malic acid.

8. The environmentally friendly green oil stripping agent according to claim 4, characterized in that: The lipolytic enzyme and the cellulase are loaded on the mesoporous SiO2 carrier by a co-immobilization method.

9. A method for preparing the environmentally friendly green oil stripping agent according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Mix the plant-derived surfactants evenly; S2. The zwitterionic surfactant is then added to the mixture obtained in step S1 and ultrasonically mixed; S3. Add the bio-enzyme preparation, stabilizer, pH adjuster, corrosion inhibitor, and amino-modified water-soluble CdSe / ZnS quantum dots to deionized water in sequence, and then add the mixture obtained in step S2, stir and mix evenly, and divide into packages to obtain an environmentally friendly green oil stripping agent.

10. A method for using the environmentally friendly green oil stripping agent according to any one of claims 1 to 8, characterized in that: Heat the environmentally friendly green oil stripping agent to a treatment temperature of 30~40℃ and spray it onto the substrate to be treated for 2~5 minutes. During the treatment process, apply light in the 450±10nm band.

Images