CN114250008A - Biological cleaning agent capable of degrading printing ink coating and preparation method thereof - Google Patents

Biological cleaning agent capable of degrading printing ink coating and preparation method thereof Download PDF

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CN114250008A
CN114250008A CN202111673993.5A CN202111673993A CN114250008A CN 114250008 A CN114250008 A CN 114250008A CN 202111673993 A CN202111673993 A CN 202111673993A CN 114250008 A CN114250008 A CN 114250008A
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吴襟
刘勇
杨静
孙振楠
张兴
孙彩窈
霍建乐
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Beijing Haode Anxin Cleaning Technology Co ltd
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    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
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Abstract

The invention discloses a biological cleaning agent capable of degrading ink paint and a preparation method thereof, wherein the cleaning agent comprises the following components: 0.02-0.07 part by weight of biological esterase solution; 0.06-0.09 parts by weight of sophorolipid; 4-10 parts of nonionic surfactant; 3-8 parts of a solubilizer; 9-12 parts of a dispersant; 0.03-0.09 part by weight of ethylenediamine tetraacetic acid; 0.01-0.02 weight part of sodium citrate; 0.02-0.06 parts of pH value regulator; 0.02-0.04 parts by weight of an anti-interference agent; and water. The biological cleaning agent is based on the compound compounding of biological esterase and a surfactant, has a synergistic interaction effect, can enhance the degradation force, the permeability and the emulsification effect of the cleaning agent, and achieves the aim of high-efficiency cleaning; the synergistic effect of sophorolipid and biological esterase can improve the solubilizing effect of the biological cleaning agent, improve the pollution resistance, improve the easy aging of the cleaning agent and the self-cleaning function of the solution brought by repeated use, and improve the repeated use frequency.

Description

Biological cleaning agent capable of degrading printing ink coating and preparation method thereof
Technical Field
The invention relates to the technical field of ink paint cleaning agents, in particular to a biological cleaning agent capable of degrading an ink paint and a preparation method thereof.
Background
The cleaning of the ink coating is commonly existed in the industrial and daily life fields, such as the cleaning of printing equipment, the cleaning of vehicle and ship surface coatings, the cleaning of special equipment maintenance and the like. The traditional ink cleaning method generally uses organic solvents which are flammable and explosive and have serious environmental pollution, and the use of the organic solvents is gradually forbidden in many countries and regions. Along with the technical progress and the environmental protection requirement, the water-based paint cleaning agent, especially the degradable environmental protection biological cleaning agent, has obvious progress, and the greatest characteristic of the biological paint cleaning agent is high efficiency and ultra-long service cycle, and can obtain better environmental protection safety.
The reality is that the homogenization problem of water-based products in the cleaning industry of China is serious. Most of domestic water-based cleaning agents are chemical cleaning agents formed by compounding surfactants and alkaline auxiliaries, strong alkaline cleaning agents still occupy a large market, the cleaning agents are simple in production process and low in cost, but easily cause the problems that personnel and equipment are damaged, and the like, and waste liquid after cleaning is difficult to treat.
Chinese patent publication No. CN102604754A (published: 20120725) discloses a biological enzyme cleaning agent, the main active components of which comprise biological enzyme liquid, sodium dodecyl benzene sulfonate, alkylphenol ethoxylates, fatty alcohol-polyoxyethylene ether, absolute ethyl alcohol, glycerol, lipase, amylase, cellulase, lysozyme and the like, wherein the biological enzyme liquid is a proteolytic enzyme prepared by deep fermentation, extraction and refining of bacillus subtilis. The biological enzyme cleaning agent has high cleaning rate and a certain sterilization effect, but is difficult to be applied to industrial cleaning in a large scale due to complex formula and high raw material price, and is more suitable for the fields of cleaning medical instruments with high sanitary and clean requirements and the like.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a biological cleaning agent capable of degrading an ink coating, which has the advantages of high cleaning rate on the metal surface covered by the ink coating, low production cost, neutrality, mildness, environmental protection and safety, and can effectively promote the degradation of the ink.
In order to achieve the aim, the invention provides a biological cleaning agent capable of degrading an ink coating, which comprises the following components in parts by weight:
0.02-0.07 part by weight of biological esterase solution;
0.06-0.09 parts by weight of sophorolipid;
4-10 parts of nonionic surfactant;
3-8 parts of a solubilizer;
9-12 parts of a dispersant;
0.03-0.09 part by weight of ethylenediamine tetraacetic acid;
0.01-0.02 weight part of sodium citrate;
0.02-0.06 parts of pH value regulator;
0.02-0.04 parts by weight of an anti-interference agent; and water.
In one embodiment of the present invention, the nonionic surfactant is an isomeric alcohol ethoxylate-propylene oxide block copolymer.
In one embodiment of the present invention, the pH adjusting agent is citric acid.
In one embodiment of the present invention, the anti-interference agent is maleic acid-sodium acrylate copolymer.
The maleic acid-sodium acrylate copolymer is used as anti-interference agent for regulating different water quality and hardness.
In an embodiment of the present invention, the solubilizer is sodium gluconate.
In one embodiment of the present invention, the dispersant is selected from sodium sulfate or zinc sulfate.
In one embodiment of the present invention, the method for preparing the bio-esterase solution comprises:
(1) adding Bacillus (Bacillus sp.) WB2 into the culture solution, and continuously inducing and culturing the initial bacterial solution to obtain a Bacillus fermentation solution;
(2) centrifuging the bacillus fermentation liquor obtained in the step (1), removing supernatant, washing, transferring the bacterial suspension into Hanks liquid, heating for thermal stimulation, and cooling;
(3) crushing thallus, centrifuging, and collecting supernatant; and directly separating and concentrating the supernatant by a tangential flow ultrafiltration system to obtain the biological esterase solution.
The biological esterase solution prepared by the method has high-purity enzyme protein, and radically solves a series of difficulties brought by traditional separation, concentration and sterilization of the biological esterase solution.
In one embodiment of the present invention, the step (1) specifically comprises the following steps: adding Bacillus (Bacillus sp.) WB2 into the culture solution, controlling the initial bacterial solution inoculation proportion to be 0.05-0.12 part by weight, and continuously culturing under the conditions of stirring speed of 100-200rpm, dissolved oxygen of 10-20%, temperature of 25-35 ℃ and pH value of 6.0-7.0 until the dry weight proportion of Bacillus is 5-6% to obtain the Bacillus fermentation solution.
In one embodiment of the present invention, the step (2) specifically comprises the following steps: and (2) centrifuging the bacillus fermentation liquor obtained in the step (1), removing supernatant, washing the thallus with Hanks liquid, transferring the bacterial suspension into a proper amount of Hanks liquid, heating to 45-60 ℃ under the conditions of stirring and dissolved oxygen of 20-40%, thermally stimulating for 10-12 hours, and cooling to 20-25 ℃.
In one embodiment of the present invention, the step (3) specifically comprises the following steps: crushing the thalli for 3 times by using a high-pressure homogenizer under the pressure of 1000-1200bar, then centrifugally separating thalli fragments, and taking supernatant; separating and concentrating the supernatant with 30KD and 80KD membranes respectively by a tangential flow ultrafiltration system; concentrating to obtain the biological esterase solution.
In an embodiment of the present invention, in the step (1), the culture solution includes trehalose, sodium citrate, sodium gluconate, ammonium sulfate, zinc sulfate, and the balance of deionized water; preferably, the culture solution comprises the following components in parts by weight: 3 parts of trehalose, 1 part of sodium citrate, 0.5 part of sodium gluconate, 5 parts of ammonium sulfate, 2 parts of zinc sulfate and the balance of deionized water.
The biological esterase adopted by the biological cleaning agent capable of degrading the ink coating has the synergistic effect of the biological esterase and the heterogeneous alcohol ethoxylate-propylene oxide block copolymer of the nonionic surfactant and other organic molecular groups, so that the efficiency of the combined action of the ink decomposition and stripping can be greatly improved, the cleaning efficiency is greatly improved, and the efficiency of the cleaning agent can be increased by more than three times.
The invention also aims to provide a preparation method of the biological cleaning agent capable of degrading the ink coating, which comprises the following steps:
and (3) uniformly mixing the biological esterase solution, sophorolipid, a nonionic surfactant, a solubilizer, a dispersant, ethylene diamine tetraacetic acid, sodium citrate, citric acid, a maleic acid-sodium acrylate copolymer and water in proportion, and adjusting the pH to 7.5 by using a pH regulator to obtain the biological cleaning agent for the ink coating.
Compared with the prior art, the invention has the following beneficial effects:
(1) the biological cleaning agent is based on the composition of biological esterase and a surfactant, has a synergistic interaction effect, can greatly enhance the permeability and the emulsification effect of the cleaning agent, and achieves the aim of high-efficiency cleaning.
(2) The synergistic effect of the sophorolipid and the biological esterase in the biological cleaning agent can greatly improve the solubilizing effect of the biological printing ink coating cleaning agent, greatly improve the pollution resistance, improve the easy aging of the cleaning agent and the self-cleaning function of the solution caused by repeated use, improve the cleaning capacity of the solution, greatly increase the cleaning effect of the cleaning agent, improve the repeated use frequency and the synergistic effect of the zinc sulfate and the citric acid, ensure that the cleaning agent has better antibacterial effect and greatly improve the storage condition of the cleaning agent.
(3) In the biological cleaning agent, the sophorolipid surfactant, the biological esterase, the isomerous alcohol ethoxylate and the propylene oxide segmented copolymer can degrade, disperse and wrap macromolecular ink lipid particles to form micromolecular ink lipid particles, so that the biological esterase can be conveniently contacted with the larger surface of the micromolecular ink lipid particles, and the ink lipid molecules can be separated and degraded more quickly and completely; the isomerol ethoxylate-propylene oxide segmented copolymer, sophorolipid and biological esterase are used in a synergistic effect and mixed with sodium gluconate, so that the efficient anti-pollution performance of the cleaning agent is greatly improved, and the cleaning force is greatly enhanced.
(4) In the biological cleaning agent, the CMC and the surface tension value of the surfactant in the solution can be obviously reduced after the high-purity biological esterase degrades the macromolecular printing ink, and the dosage of the surfactant is saved.
(5) The use of the composite surfactant in the biological cleaning agent and the synergistic effect of the biological esterase enable the saponification of the printing ink grease and the hydrolysis of the macromolecule to be independent of the hydrolysis of the printing ink grease by strong alkali, and the biological cleaning agent is neutral, mild and non-corrosive.
(6) The biological cleaning agent has simple and mature process steps and is beneficial to large-scale industrial application.
(7) The main active components of the biological cleaning agent comprise a sophorolipid surfactant, a biological esterase, an isomerous alcohol ethoxylate and a propylene oxide block copolymer, and the copolymer of maleic acid and acrylic acid is used in a compatible manner, so that the copolymer of maleic acid and acrylic acid is an excellent hard water resisting agent and has excellent antifouling performance, the repeated use frequency is greatly improved, the cleaning agent has good hard water resisting capacity, and the cleaning agent is superior to common chemical cleaning agents in the market at present.
(8) The biological cleaning agent is non-toxic, is an aqueous product, is not flammable, does not contain strong alkaline substances, cannot damage metal materials, cannot damage a zinc coating and an epoxy resin coating, and can accelerate the biodegradation of the ink coating.
The bacillus WB-2 has the strain preservation number of CGMCC No.03670, is separated from soil, has spores and gram-positive bacteria, has rough bacterial colony and is dirty and white.
Detailed Description
The following detailed description of specific embodiments of the invention is provided, but it should be understood that the scope of the invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Example 1
The embodiment provides a biological cleaning agent for an efficient degradable ink coating, which comprises the following components in parts by weight (total 100 parts):
0.02 part by weight of biological esterase solution;
0.06 part by weight of sophorolipid;
4 parts by weight of a nonionic surfactant isomeric alcohol ethoxylate-propylene oxide block copolymer;
6 parts by weight of solubilizer sodium gluconate;
12 parts by weight of dispersant sodium sulfate;
0.03 part by weight of ethylenediamine tetraacetic acid;
0.02 part by weight of sodium citrate;
0.02 part by weight of pH value regulator citric acid;
0.02 part by weight of an anti-interference agent maleic acid-sodium acrylate copolymer;
the balance being water.
The preparation process of the biological cleaning agent for the ink coating comprises the following steps: and (2) uniformly mixing the biological esterase solution, sophorolipid, a nonionic surfactant isomerol ethoxylate-propylene oxide segmented copolymer, a solubilizer sodium gluconate, a dispersant sodium sulfate, ethylene diamine tetraacetic acid and water in proportion, adding an anti-interference agent maleic acid-sodium acrylate copolymer, and adjusting the pH to 7.5 by using a pH regulator citric acid, namely the biological cleaning agent for the ink coating.
In this example, the preparation process of the bio-esterase solution is as follows:
(1) adding Bacillus (Bacillus sp.) WB2 into the culture solution, controlling the inoculation proportion of the initial bacterial solution to be 0.05 part by weight, and continuously culturing under the conditions of stirring speed of 100-200rpm, dissolved oxygen of 10-20%, temperature of 25-35 ℃ and pH of 6.0-7.0 until the dry weight proportion of the Bacillus is 5-6% to obtain a Bacillus fermentation solution;
(2) taking the bacillus fermentation liquor obtained in the step (1), centrifuging, removing supernatant, washing thalli with Hanks liquid, transferring bacterial suspension into a proper amount of Hanks liquid, heating to 45-60 ℃ under the conditions of stirring and 20-40% dissolved oxygen, thermally stimulating for 10-12h, and cooling to 20-25 ℃;
(3) crushing the thalli for 3 times by using a high-pressure homogenizer under the pressure of 1000-1200bar, then centrifugally separating thalli fragments, and taking supernatant; separating and concentrating the supernatant with 30KD and 80KD membranes respectively by a tangential flow ultrafiltration system; concentrating to obtain the biological esterase solution.
In this embodiment, in step (1), the culture solution includes, by weight, 3 parts of trehalose, 1 part of sodium citrate, 0.5 part of sodium gluconate, 5 parts of ammonium sulfate, 2 parts of zinc sulfate, and the balance deionized water; and sterilizing the culture solution for later use.
Example 2
The embodiment provides a biological cleaning agent for an efficient degradable ink coating, which comprises the following components in parts by weight (total 100 parts):
biological esterase solution: 0.03 part by weight;
sophorolipid: 0.06 part by weight;
nonionic surfactant isomeric alcohol ethoxylate-propylene oxide block copolymer: 6 parts by weight;
solubilizer sodium gluconate: 8 parts by weight;
sodium sulfate as a dispersant: 12 parts by weight;
ethylene diamine tetraacetic acid: 0.03 part by weight;
sodium citrate: 0.02 parts by weight;
pH value regulator citric acid: 0.02 parts by weight;
anti-interference agent maleic acid-sodium acrylate copolymer: 0.02 parts by weight;
the balance being water.
In this example, the preparation process of the bioprotein solution is as follows:
(1) adding Bacillus (Bacillus sp.) WB2 into the culture solution, controlling the initial bacterial solution inoculation proportion at 0.12 weight part, and continuously culturing under the conditions of stirring speed of 100-200rpm, dissolved oxygen of 10-20%, temperature of 25-35 ℃ and pH of 6.0-7.0 until the dry weight proportion of Bacillus is 5-6% to obtain Bacillus fermentation liquor;
(2) taking the bacillus fermentation liquor obtained in the step (1), centrifuging, removing supernatant, washing thalli with Hanks liquid, transferring bacterial suspension into a proper amount of Hanks liquid, heating to 45-60 ℃ under the conditions of stirring and 20-40% dissolved oxygen, thermally stimulating for 10-12h, and cooling to 20-25 ℃;
(3) crushing the thalli for 3 times by using a high-pressure homogenizer under the pressure of 1000-1200bar, then centrifugally separating thalli fragments, and taking supernatant; separating and concentrating the supernatant with 30KD and 80KD membranes respectively by a tangential flow ultrafiltration system; concentrating to obtain the biological esterase solution.
Wherein, in the step (1), the culture solution consists of 0.3 of trehalose, 0.1 of sodium citrate, 0.05 of sodium gluconate, 0.5 of ammonium sulfate, 0.2 of zinc sulfate and the balance of deionized water, and is used after sterilization.
In this embodiment, in step (1), the culture solution includes, by weight, 3 parts of trehalose, 1 part of sodium citrate, 0.5 part of sodium gluconate, 5 parts of ammonium sulfate, 2 parts of zinc sulfate, and the balance deionized water; and sterilizing the culture solution for later use.
Example 3
The embodiment provides a biological cleaning agent for an efficient degradable ink coating, which comprises the following components in parts by weight:
biological esterase solution: 0.06 part by weight;
sophorolipid: 0.09 parts by weight;
nonionic surfactant isomeric alcohol ethoxylate-propylene oxide block copolymer: 9 parts by weight;
solubilizer sodium gluconate: 4 parts by weight;
sodium sulfate as a dispersant: 9 parts by weight;
ethylene diamine tetraacetic acid: 0.03 part by weight;
sodium citrate: 0.02 parts by weight;
pH value regulator citric acid: 0.02 parts by weight;
anti-interference agent maleic acid-sodium acrylate copolymer: 0.02 parts by weight;
the balance being water.
In this example, the preparation process of the bio-esterase solution is as follows:
(1) adding Bacillus (Bacillus sp.) WB2 into the culture solution, controlling the inoculation proportion of the initial bacterial solution to be 0.09 weight part, and continuously culturing under the conditions of stirring speed of 100-200rpm, dissolved oxygen of 10-20%, temperature of 25-35 ℃ and pH of 6.0-7.0 until the dry weight proportion of the Bacillus is 5-6% to obtain Bacillus fermentation liquor;
(2) taking the bacillus fermentation liquor obtained in the step (1), centrifuging, removing supernatant, washing thalli with Hanks liquid, transferring bacterial suspension into a proper amount of Hanks liquid, heating to 45-60 ℃ under the conditions of stirring and 20-40% dissolved oxygen, thermally stimulating for 10-12h, and cooling to 20-25 ℃;
(3) crushing the thalli for 3 times by using a high-pressure homogenizer under the pressure of 1000-1200bar, then centrifugally separating thalli fragments, and taking supernatant; separating and concentrating the supernatant with 30KD and 80KD membranes respectively by a tangential flow ultrafiltration system; and concentrating to obtain the biological esterase solution.
In this embodiment, in step (1), the culture solution includes, by weight, 3 parts of trehalose, 1 part of sodium citrate, 0.5 part of sodium gluconate, 5 parts of ammonium sulfate, 2 parts of zinc sulfate, and the balance deionized water; and sterilizing the culture solution for later use.
Example 4
The embodiment provides a biological cleaning agent for an efficient degradable ink coating, which comprises the following components in parts by weight:
biological esterase solution: 0.03 part by weight;
sophorolipid: 0.07 part by weight;
nonionic surfactant isomeric alcohol ethoxylate-propylene oxide block copolymer: 6 parts by weight;
solubilizer sodium gluconate: 8 parts by weight;
sodium sulfate as a dispersant: 9 parts by weight;
ethylene diamine tetraacetic acid: 0.03 part by weight;
sodium citrate: 0.02 parts by weight;
pH value regulator citric acid: 0.02 parts by weight;
anti-interference agent maleic acid-sodium acrylate copolymer: 0.02 parts by weight;
the balance being water.
In this example, the preparation process of the bio-esterase solution is as follows:
(1) adding Bacillus oilreducing WB2 into the culture solution, controlling the initial bacterial solution inoculation proportion to be 0.06 weight part, and continuously culturing under the conditions of stirring speed of 100-200rpm, dissolved oxygen of 10-20%, temperature of 25-35 ℃ and pH of 6.0-7.0 until the dry weight proportion of the Bacillus is 5-6% to obtain Bacillus fermentation liquor;
(2) taking the bacillus fermentation liquor obtained in the step (1), centrifuging, removing supernatant, washing thalli with Hanks liquid, transferring bacterial suspension into a proper amount of Hanks liquid, heating to 45-60 ℃ under the conditions of stirring and 20-40% dissolved oxygen, thermally stimulating for 10-12h, and cooling to 20-25 ℃;
(3) crushing the thalli for 3 times by using a high-pressure homogenizer under the pressure of 1000-1200bar, then centrifugally separating thalli fragments, and taking supernatant; separating and concentrating the supernatant with 30KD and 80KD membranes respectively by a tangential flow ultrafiltration system; concentrating to obtain the biological esterase solution.
In this embodiment, in step (1), the culture solution includes, by weight, 3 parts of trehalose, 1 part of sodium citrate, 0.5 part of sodium gluconate, 5 parts of ammonium sulfate, 2 parts of zinc sulfate, and the balance deionized water; and sterilizing the culture solution for later use.
Example 5
The embodiment provides a biological cleaning agent for an efficient degradable ink coating, which comprises the following components in parts by weight:
biological esterase solution: 0.04 parts by weight;
sophorolipid: 0.06 part by weight;
nonionic surfactant isomeric alcohol ethoxylate-propylene oxide block copolymer: 9 parts by weight;
solubilizer sodium gluconate: 4 parts by weight;
sodium sulfate as a dispersant: 11 parts by weight;
ethylene diamine tetraacetic acid: 0.09 parts by weight;
sodium citrate: 0.01 part by weight;
pH value regulator citric acid: 0.06 part by weight;
anti-interference agent maleic acid-sodium acrylate copolymer: 0.04 parts by weight;
the balance being water.
In this example, the preparation process of the bio-esterase solution is as follows:
(1) adding Bacillus oilreducing WB2 into the culture solution, controlling the initial bacterial solution inoculation proportion to be 0.09 weight part, and continuously culturing under the conditions of stirring speed of 100-200rpm, dissolved oxygen of 10-20%, temperature of 25-35 ℃ and pH of 6.0-7.0 until the dry weight proportion of the Bacillus is 5-6% to obtain Bacillus fermentation liquor;
(2) taking the bacillus fermentation liquor obtained in the step (1), centrifuging, removing supernatant, washing thalli with Hanks liquid, transferring bacterial suspension into a proper amount of Hanks liquid, heating to 45-60 ℃ under the conditions of stirring and 20-40% dissolved oxygen, thermally stimulating for 10-12h, and cooling to 20-25 ℃;
(3) crushing the thalli for 3 times by using a high-pressure homogenizer under the pressure of 1000-1200bar, then centrifugally separating thalli fragments, and taking supernatant; separating and concentrating the supernatant with 30KD and 80KD membranes respectively by a tangential flow ultrafiltration system; concentrating to obtain the biological esterase solution.
In this embodiment, in step (1), the culture solution includes, by weight, 3 parts of trehalose, 1 part of sodium citrate, 0.5 part of sodium gluconate, 5 parts of ammonium sulfate, 2 parts of zinc sulfate, and the balance deionized water; and sterilizing the culture solution for later use.
Example 6
The embodiment provides a biological cleaning agent for an efficient degradable ink coating, which comprises the following components in parts by weight:
biological esterase solution: 0.07 part by weight;
sophorolipid: 0.08 parts by weight;
nonionic surfactant isomeric alcohol ethoxylate-propylene oxide block copolymer: 10 parts by weight;
solubilizer sodium gluconate: 3 parts by weight;
sodium sulfate as a dispersant: 9 parts by weight;
ethylene diamine tetraacetic acid: 0.04 parts by weight;
sodium citrate: 0.02 parts by weight;
pH value regulator citric acid: 0.05 part by weight;
anti-interference agent maleic acid-sodium acrylate copolymer: 0.02 parts by weight;
the balance being water.
In this example, the preparation process of the bio-esterase solution is as follows:
(1) adding Bacillus oilreducing WB2 into the culture solution, controlling the initial bacterial solution inoculation proportion to be 0.07 weight part, and continuously culturing under the conditions of stirring speed of 100-200rpm, dissolved oxygen of 10-20%, temperature of 25-35 ℃ and pH of 6.0-7.0 until the dry weight proportion of the Bacillus is 5-6% to obtain Bacillus fermentation liquor;
(2) taking the bacillus fermentation liquor obtained in the step (1), centrifuging, removing supernatant, washing thalli with Hanks liquid, transferring bacterial suspension into a proper amount of Hanks liquid, heating to 45-60 ℃ under the conditions of stirring and 20-40% dissolved oxygen, thermally stimulating for 10-12h, and cooling to 20-25 ℃;
(3) crushing the thalli for 3 times by using a high-pressure homogenizer under the pressure of 1000-1200bar, then centrifugally separating thalli fragments, and taking supernatant; separating and concentrating the supernatant with 30KD and 80KD membranes respectively by a tangential flow ultrafiltration system; concentrating to obtain the biological esterase solution.
In this embodiment, in step (1), the culture solution includes, by weight, 3 parts of trehalose, 1 part of sodium citrate, 0.5 part of sodium gluconate, 5 parts of ammonium sulfate, 2 parts of zinc sulfate, and the balance deionized water; and sterilizing the culture solution for later use.
Comparative example 1
The comparative example is a commercially available chemical cleaning agent for printing ink, and is a high-efficiency water-based cleaning agent which is made by Beijing water-based chemical company Limited and has the model number of SJ-1021.
Comparative example 2
The comparative example is a strong alkaline industrial cleaning agent (pH 12.0) which is from Beijing Bingshi technology Co., Ltd and is BL-102 normal temperature cleaning agent.
Application example 1
(1) Preparing an artificial ink coating:
the artificial ink comprises the following components in parts by weight: 30% of No. 15 hydraulic oil, 35% of industrial white vaseline and 35% of carbon black; the raw materials are uniformly mixed, uniformly coated on a metal test piece at about 105 ℃, baked for 10 minutes, cooled and accurately weighed for later use.
(2) The cleaning agents prepared in examples 1-6 and comparative examples 1-2 were used to clean the obtained metal test pieces of the artificial ink coating according to the national standard GB/T35759-2017 (metal cleaning agent), and the effects are shown in Table 1. And calculating to obtain cleaning rate data so as to check and check the cleaning effect.
Figure BDA0003453810790000141
Wherein η ═ (A3-a1)/(a2-a 1). Wherein, A2, A3 and A1 are the weight of the workpiece before and after the workpiece is inked and the weight of the test piece respectively.
It can be seen that the cleaning rates of the biological cleaning agent of the ink coating materials of examples 1 to 6 are higher than those of the chemical cleaning agent of comparative example 1 and the domestic commercial strong alkaline industrial cleaning agent of comparative example 2, and the best effect is 99.4%, but the cleaning rate of comparative example 1 is only 39.5%, and the cleaning rate of comparative example 2 is 49.4%, which are lower than those of the above examples. It can be seen that the bio-cleaner for the ink coating materials of examples 1 to 6 can significantly reduce the critical micelle concentration of the surfactant and the surface tension in water after adding the bio-esterase solution, thereby significantly enhancing the permeability and emulsifying ability thereof. Meanwhile, the biodegradability of waste liquid after the ink emulsification can be obviously improved. Therefore, the biological cleaning agent for the ink coating of the embodiments 1 to 6 is prepared by mixing the biological esterase solution with the surfactant, the solubilizer, the complexing agent and the like, and has the characteristics of high cleaning efficiency, mild neutrality, environmental protection, safety and the like.
Application example 2
(1) The biological esterase prepared in example 1 was diluted with deionized water to 50% and 80% by mass, and stirred and aerated, and the Dissolved Oxygen (DO) in 2 bioreactors was controlled to 2-4 mg/L. After 48 hours, another sample was taken and left to stand to measure the COD value of the supernatant, and the change of the COD value before and after the comparison was carried out, the results are shown in Table 2.
TABLE 2
Item Application example 1 Application example 2
Initial value 387 419
After 48 hours 72 83
Various corresponding changes and modifications can be made by those skilled in the art based on the above technical solutions and concepts, and all such changes and modifications should be included in the protection scope of the present invention.

Claims (10)

1. The biological cleaning agent capable of degrading the ink coating is characterized by comprising the following components in parts by weight:
0.02-0.07 part by weight of biological esterase solution;
0.06-0.09 parts by weight of sophorolipid;
4-10 parts of nonionic surfactant;
3-8 parts of a solubilizer;
9-12 parts of a dispersant;
0.03-0.09 part by weight of ethylenediamine tetraacetic acid;
0.01-0.02 weight part of sodium citrate;
0.02-0.06 parts of pH value regulator;
0.02-0.04 parts by weight of an anti-interference agent; and
and (3) water.
2. The biological cleaning agent capable of degrading the ink paint according to claim 1, wherein the nonionic surfactant is an isomeric alcohol ethoxylate-propylene oxide block copolymer; the pH value regulator is citric acid.
3. The biological cleaning agent capable of degrading the ink paint according to claim 1, wherein the anti-interference agent is maleic acid-sodium acrylate copolymer.
4. The biological cleaning agent capable of degrading the ink coating according to claim 1, wherein the solubilizer is sodium gluconate; the dispersant is selected from sodium sulfate or zinc sulfate.
5. The biological cleaning agent capable of degrading the ink paint according to claim 1, wherein the preparation method of the biological esterase solution comprises the following steps:
(1) adding Bacillus (Bacillus sp.) WB2 into the culture solution, and carrying out continuous induction culture to obtain a Bacillus fermentation solution;
(2) centrifuging the bacillus fermentation liquor obtained in the step (1), removing supernatant, washing, transferring the bacterial suspension into Hanks liquid, heating for thermal stimulation, and cooling;
(3) crushing thallus, centrifuging, and collecting supernatant; separating and concentrating enzyme protein of the supernatant through a tangential flow ultrafiltration system, and concentrating to obtain the biological esterase solution.
6. The biological cleaning agent capable of degrading the ink paint according to claim 5, wherein the step (1) comprises the following specific steps: adding Bacillus (Bacillus sp.) WB2 into the culture solution, controlling the initial bacterial solution inoculation proportion to be 0.05-0.12 part by weight, and carrying out continuous induction culture under the conditions of stirring rotation speed of 100-200rpm, dissolved oxygen of 10-20%, temperature of 25-35 ℃ and pH value of 6.0-7.0 until the dry weight proportion of the Bacillus is 5-6% to obtain the Bacillus fermentation liquor.
7. The biological cleaning agent capable of degrading the ink paint according to claim 5, wherein the step (2) comprises the following specific steps: and (2) centrifuging the bacillus fermentation liquor obtained in the step (1), removing supernatant, washing the thallus with Hanks liquid, transferring the bacterial suspension into a proper amount of Hanks liquid, heating to 45-60 ℃ under the conditions of stirring and dissolved oxygen of 20-40%, thermally stimulating for 10-12 hours, and cooling to 20-25 ℃.
8. The biological cleaning agent capable of degrading the ink paint according to claim 5, wherein the step (3) comprises the following specific steps: crushing the thalli for 3 times by using a high-pressure homogenizer under the pressure of 1000-1200bar, then centrifugally separating thalli fragments, and taking supernatant; separating and concentrating the supernatant with 30KD and 80KD membranes respectively by a tangential flow ultrafiltration system; concentrating to obtain the biological esterase solution.
9. The biological cleaning agent for degradable ink coatings according to claim 5 or 6, characterized in that in the step (1), the culture solution comprises trehalose, sodium citrate, sodium gluconate, ammonium sulfate, zinc sulfate and the balance of deionized water; preferably, the culture solution comprises the following components in parts by weight: 3 parts of trehalose, 1 part of sodium citrate, 0.5 part of sodium gluconate, 5 parts of ammonium sulfate, 2 parts of zinc sulfate and the balance of deionized water.
10. The preparation method of the biological cleaning agent for the degradable ink coating according to claim 1, characterized by comprising the following steps:
and (3) uniformly mixing the biological esterase solution, sophorolipid, a nonionic surfactant, a solubilizer, a dispersant, ethylene diamine tetraacetic acid, sodium citrate, citric acid, a maleic acid-sodium acrylate copolymer and water in proportion, and adjusting the pH to 7.5 by using a pH regulator to obtain the biological cleaning agent for the ink coating.
CN202111673993.5A 2021-12-31 2021-12-31 Biological cleaning agent capable of degrading printing ink coating and preparation method thereof Pending CN114250008A (en)

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