CN114133819A - Antibacterial water-based acrylic resin coating and preparation method thereof - Google Patents
Antibacterial water-based acrylic resin coating and preparation method thereof Download PDFInfo
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Abstract
The invention relates to an antibacterial water-based acrylic resin coating and a preparation method thereof, wherein the antibacterial water-based acrylic resin coating comprises the following raw materials in parts by weight: 25-32 parts of modified acrylic resin, 3-6 parts of polyacrylamide, 3-5 parts of polyvinylpyrrolidone, 3-5 parts of polysiloxane and 10-30 parts of deionized water; the acrylic resin is structurally modified, so that the modified acrylic resin can have excellent antibacterial performance, the coating has good antibacterial property, chemical bond acting force exists between an antibacterial group and the resin, the antibacterial group and the resin cannot migrate, the antibacterial service life is as long as the service life of the resin, an antibacterial agent does not need to be added when the antibacterial coating is prepared, and the phenomenon that the antibacterial performance of the antibacterial coating is attenuated or even lost due to the reasons that the added antibacterial agent is not uniformly dispersed in a coating film, is easy to migrate, has a non-lasting effect and the like is avoided.
Description
Technical Field
The invention belongs to the technical field of functional coatings, and particularly relates to an antibacterial water-based acrylic resin coating and a preparation method thereof.
Background
Compared with the traditional solvent-based paint, the water-based acrylic resin has the advantages of low price, safe use, resource and energy conservation, environmental pollution and public nuisance reduction and the like, thereby becoming the main direction for developing the paint industry at present. The water-based acrylic resin coating is the pollution-free coating which is the fastest in development and the most in variety in the water-based coatings.
At present, many antibacterial coatings are additive antibacterial coatings, and an additional antibacterial agent is adopted to achieve a certain antibacterial effect, and because the added antibacterial agent is not uniformly dispersed in a coating film, is easy to migrate, has a non-lasting effect and the like, the antibacterial performance of the antibacterial coating is attenuated and even lost, so that the application of the antibacterial coating has great limitation; therefore, the groups with antibacterial performance are connected to the macromolecular chain through a chemical bond through a certain chemical reaction, and the macromolecular polymer is used as a base material to prepare the antibacterial coating, so that the antibacterial coating has important economic value and wide market space.
Disclosure of Invention
In order to solve the technical problems, the invention provides an antibacterial water-based acrylic resin coating and a preparation method thereof.
The purpose of the invention can be realized by the following technical scheme:
an antibacterial water-based acrylic resin coating comprises the following raw materials in parts by weight: 25-32 parts of modified acrylic resin, 3-6 parts of polyacrylamide, 3-5 parts of polyvinylpyrrolidone, 3-5 parts of polysiloxane and 10-30 parts of deionized water;
the modified acrylic resin is prepared by the following steps:
step A1, adding a pyrrole compound into dimethyl sulfoxide, dropwise adding triethylamine to adjust the pH value until the pH value is 8-9, heating to 65 ℃, keeping the temperature to react for 30min, adding glycidyl methacrylate, and uniformly stirring at a rotation speed of 180r/min for 72h to prepare a functional monomer, wherein the dosage ratio of the pyrrole compound to the dimethyl sulfoxide is controlled to be 10 g: 50mL, and the molar ratio of the pyrrole compound to the glycidyl methacrylate is 1: 1.1-1.2;
in the step A1, pyrrole compound is mixed with glycidyl methacrylate under alkalescent condition, the glycidyl methacrylate generates ring-opening reaction, double bond is introduced into the pyrrole compound, and the pyrrole compound can be used as a functional monomer for participating in the synthesis of acrylic resin.
Step A2, adding 30% of mixed monomer and 25% of benzoyl peroxide into 25% of ethanol, stirring at a constant speed, heating to 85 ℃, carrying out heat preservation reaction for 10min, then adding the rest of mixed monomer, 25% of benzoyl peroxide and functional monomer, stirring after completely adding, reacting for 3h, then adding the rest of ethanol and benzoyl peroxide, continuing to react for 3h, cooling to 45 ℃ after the reaction is finished, dropwise adding triethylamine while stirring to adjust the pH until the system is neutral, continuing to react for 30min, and adding deionized water to prepare the modified acrylic resin, wherein the molar ratio of the mixed monomer to the functional monomer is controlled to be 4: 1, the content of the benzoyl peroxide is 3% of the weight of the mixed monomer, the volume ratio of the ethanol to the deionized water is 1: 1, and the total amount of the ethanol and the deionized water is 50% of the weight of the mixed monomer and the functional monomer.
The mixed monomer and the functional monomer are polymerized under the action of the initiator in the step A2 to generate the acrylic resin, and the antibacterial pyrrole compound introduced into the structure of the functional monomer can prevent the antibacterial property of the antibacterial coating from being attenuated or even lost due to the reasons of uneven dispersion, easy migration, degradation, color change, non-lasting effect, environmental pollution and the like of the added antibacterial agent in the coating film caused by the antibacterial property improvement by adding the antibacterial agent in the prior art, and the application of the antibacterial coating has great limitation.
Further: the mixed monomer is formed by mixing methyl methacrylate, butyl acrylate, hydroxyethyl acrylate and acrylic acid according to the molar ratio of 1: 1.
Further: the pyrrole compound is prepared by the following steps:
step S1, adding difluoropyrocatechol formal into a n-hexane solution of tert-butyl lithium at-70 ℃, reacting for 3 hours at the temperature, slowly dropwise adding a tetrahydrofuran solution of ethoxymethylene ethyl cyanoacetate, continuing to react for 1 hour, heating to room temperature, preserving heat, reacting for 2 hours, washing a reaction solution to be neutral after the reaction is finished, extracting with ethyl acetate, drying, and concentrating under reduced pressure to obtain an intermediate 1, wherein the dosage ratio of the difluoropyrocatechol formal to the n-hexane solution of tert-butyl lithium to the tetrahydrofuran solution of ethoxymethylene ethyl cyanoacetate is controlled to be 6.8-7.1 g: 15 g: 50 mL;
in step S1, difluorocatechol formal and ethyl ethoxymethylenecyanoacetate react under the action of tert-butyllithium to produce intermediate 1, which has the following structure:
step S2, adding the intermediate 1 into a four-neck flask, introducing nitrogen, maintaining the temperature of the system at 0 ℃, adding dichloromethane, cooling to-5 ℃, then adding potassium hydroxide and dichloromethane, stirring at a constant speed for 2h, slowly dropwise adding dichloromethane solution of p-benzenesulfonylmethyl isonitrile, reacting at room temperature for 1h, filtering, washing with water, and recrystallizing after the reaction is finished to obtain the pyrrole compound, wherein the dosage ratio of the dichloromethane solution of the intermediate 1, dichloromethane, potassium hydroxide and p-benzenesulfonylmethyl isonitrile is controlled to be 5.2-5.6 g: 60 mL: 1.2-1.3 g: 20mL, and the volume ratio of the two dichloromethane additions is 1: 2.
In the step S2, the intermediate 1 reacts with p-benzenesulfonyl methylisonitrile, the p-benzenesulfonyl methylisonitrile attacks the double bond structure on the intermediate 1, and the pyrrole structure is introduced on the basis of the intermediate 1 to prepare a pyrrole compound, which is a fluoro pyrrole compound and can hinder electron transfer in a respiratory chain when acting on fungi, wherein the electron transfer can simultaneously affect the formation of Adenosine Triphosphate (ATP), inhibit the formation of energy, inhibit the synthesis of RNA, DNA and protein, and reduce the absorption of amino acids and the like, so that the purpose of sterilization is achieved, and the antibacterial agent further has excellent antibacterial performance;
further: the n-hexane solution of the tert-butyl lithium is prepared by mixing tert-butyl lithium and n-hexane according to the dosage ratio of 0.04 mol: 15 g.
Further: the tetrahydrofuran solution of the ethoxy methylene cyano ethyl acetate is formed by mixing the ethoxy methylene cyano ethyl acetate and tetrahydrofuran according to the dosage ratio of 8.0-8.2 g: 50 mL.
Further: the dichloromethane solution of the p-benzenesulfonyl methyl isonitrile is prepared by mixing the p-benzenesulfonyl methyl isonitrile and dichloromethane according to the dosage ratio of 0.02-0.022 mol: 20 mL.
A preparation method of an antibacterial water-based acrylic resin coating comprises the following steps:
adding polyacrylamide, polyvinylpyrrolidone and polysiloxane into deionized water, stirring at a high speed for 30min to obtain a mixed solution, adding modified acrylic resin into the mixed solution, heating to 65-75 ℃, mixing at a high speed for 3-4h, uniformly mixing, and cooling to room temperature to obtain the antibacterial water-based acrylic resin coating.
The invention has the beneficial effects that:
the antibacterial water-based acrylic resin coating of the invention takes the modified acrylic resin as a substrate, the acrylic resin is structurally modified, the modified acrylic resin can be endowed with excellent antibacterial performance, the coating is endowed with good antibacterial property, chemical bond acting force exists between antibacterial groups and the resin, the antibacterial group and the resin can not migrate, the antibacterial service life is the same as the resin service life, when the antibacterial coating is prepared, an antibacterial agent is not required to be added, the antibacterial performance of the antibacterial coating is prevented from being attenuated or even lost due to the reasons of uneven dispersion, easy migration, non-lasting effect and the like of the added antibacterial agent in a coating film, the antibacterial performance can be achieved, the antibacterial water-based acrylic resin coating can be used for internal and external wall coatings, water-based wood coatings and water-based industrial coatings, and an antibacterial functional monomer is introduced during synthesis, the antibacterial performance is improved, the antibacterial functional monomer is a pyrrole compound and is mixed with glycidyl methacrylate under the alkalescent condition, glycidyl methacrylate undergoes a ring-opening reaction, a double bond is introduced into the pyrrole compound, and the polymerization can be carried out as a monomer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The modified acrylic resin is prepared by the following steps:
adding difluorocatechol formal into a n-hexane solution of tert-butyl lithium at-70 ℃, reacting for 3 hours at the temperature, slowly dropwise adding a tetrahydrofuran solution of ethoxymethylene ethyl cyanoacetate, continuing to react for 1 hour, heating to room temperature, preserving heat for reaction for 2 hours, washing a reaction solution to be neutral after the reaction is finished, extracting with ethyl acetate, drying, and concentrating under reduced pressure to obtain an intermediate 1, wherein the dosage ratio of the difluorocatechol formal, the n-hexane solution of tert-butyl lithium and the tetrahydrofuran solution of ethoxymethylene ethyl cyanoacetate is controlled to be 6.8 g: 15 g: 50 mL;
adding the intermediate 1 into a four-neck flask, introducing nitrogen, maintaining the temperature of the system at 0 ℃, adding dichloromethane, cooling to-5 ℃, then adding potassium hydroxide and dichloromethane, stirring at a constant speed for 2 hours, slowly dropwise adding a dichloromethane solution of p-benzenesulfonylmethyl isonitrile, reacting at room temperature for 1 hour, filtering, washing with water, and recrystallizing after the reaction is finished to obtain the pyrrole compound, wherein the dosage ratio of the dichloromethane solution of the intermediate 1, dichloromethane, potassium hydroxide and p-benzenesulfonylmethyl isonitrile is controlled to be 5.2 g: 60 mL: 1.2 g: 20mL, and the volume ratio of the two dichloromethane additions is 1: 2.
The n-hexane solution of the tert-butyl lithium is prepared by mixing tert-butyl lithium and n-hexane according to the dosage ratio of 0.04 mol: 15 g.
The tetrahydrofuran solution of the ethoxy methylene ethyl cyanoacetate is formed by mixing the ethoxy methylene ethyl cyanoacetate and tetrahydrofuran according to the dosage ratio of 8.0g to 50 mL.
The dichloromethane solution of the p-benzenesulfonyl methyl isonitrile is formed by mixing the p-benzenesulfonyl methyl isonitrile and dichloromethane according to the dosage ratio of 0.02 mol: 20 mL.
Adding a pyrrole compound into dimethyl sulfoxide, dropwise adding triethylamine to adjust the pH value until the pH value is 8, heating to 65 ℃, carrying out heat preservation reaction for 30min, adding glycidyl methacrylate, and stirring at a constant speed of 150r/min for 72h to prepare a functional monomer, wherein the dosage ratio of the pyrrole compound to the dimethyl sulfoxide is controlled to be 10 g: 50mL, and the molar ratio of the pyrrole compound to the glycidyl methacrylate is 1: 1.1;
adding 30% of mixed monomer and 25% of benzoyl peroxide into 25% of ethanol, stirring at a constant speed, heating to 85 ℃, carrying out heat preservation reaction for 10min, then adding the rest of mixed monomer, 25% of benzoyl peroxide and functional monomer, stirring after completely adding, reacting for 3h, then adding the rest of ethanol and benzoyl peroxide, continuing to react for 3h, cooling to 45 ℃ after the reaction is finished, dropwise adding triethylamine while stirring to adjust the pH until the system is neutral, continuing to react for 30min, and adding deionized water to prepare the modified acrylic resin, wherein the molar ratio of the mixed monomer to the functional monomer is controlled to be 4: 1, the amount of the benzoyl peroxide is 3% of the weight of the mixed monomer, the volume ratio of the ethanol to the deionized water is 1: 1, and the total amount of the ethanol and the deionized water is 50% of the weight of the mixed monomer and the functional monomer.
The mixed monomer is formed by mixing methyl methacrylate, butyl acrylate, hydroxyethyl acrylate and acrylic acid according to the molar ratio of 1: 1.
Example 2
The modified acrylic resin is prepared by the following steps:
adding difluorocatechol formal into a n-hexane solution of tert-butyl lithium at-70 ℃, reacting for 3 hours at the temperature, slowly dropwise adding a tetrahydrofuran solution of ethoxymethylene ethyl cyanoacetate, continuing to react for 1 hour, heating to room temperature, preserving heat for reaction for 2 hours, washing a reaction solution to be neutral after the reaction is finished, extracting with ethyl acetate, drying, and concentrating under reduced pressure to obtain an intermediate 1, wherein the dosage ratio of the difluorocatechol formal, the n-hexane solution of tert-butyl lithium and the tetrahydrofuran solution of ethoxymethylene ethyl cyanoacetate is controlled to be 7.0 g: 15 g: 50 mL;
adding the intermediate 1 into a four-neck flask, introducing nitrogen, maintaining the temperature of the system at 0 ℃, adding dichloromethane, cooling to-5 ℃, then adding potassium hydroxide and dichloromethane, stirring at a constant speed for 2 hours, slowly dropwise adding a dichloromethane solution of p-benzenesulfonylmethyl isonitrile, reacting at room temperature for 1 hour, filtering, washing with water, and recrystallizing after the reaction is finished to obtain the pyrrole compound, wherein the dosage ratio of the dichloromethane solution of the intermediate 1, dichloromethane, potassium hydroxide and p-benzenesulfonylmethyl isonitrile is controlled to be 5.4 g: 60 mL: 1.2 g: 20mL, and the volume ratio of the two dichloromethane additions is 1: 2.
The n-hexane solution of the tert-butyl lithium is prepared by mixing tert-butyl lithium and n-hexane according to the dosage ratio of 0.04 mol: 15 g.
The tetrahydrofuran solution of the ethoxy methylene ethyl cyanoacetate is formed by mixing the ethoxy methylene ethyl cyanoacetate and tetrahydrofuran according to the dosage ratio of 8.1g to 50 mL.
The dichloromethane solution of the p-benzenesulfonyl methyl isonitrile is prepared by mixing the p-benzenesulfonyl methyl isonitrile and dichloromethane according to the dosage ratio of 0.021 mol: 20 mL.
Adding a pyrrole compound into dimethyl sulfoxide, dropwise adding triethylamine to adjust the pH value until the pH value is 8, heating to 65 ℃, carrying out heat preservation reaction for 30min, adding glycidyl methacrylate, and stirring at a constant speed of 160r/min for 72h to prepare a functional monomer, wherein the dosage ratio of the pyrrole compound to the dimethyl sulfoxide is controlled to be 10 g: 50mL, and the molar ratio of the pyrrole compound to the glycidyl methacrylate is 1: 1.1;
adding 30% of mixed monomer and 25% of benzoyl peroxide into 25% of ethanol, stirring at a constant speed, heating to 85 ℃, carrying out heat preservation reaction for 10min, then adding the rest of mixed monomer, 25% of benzoyl peroxide and functional monomer, stirring after completely adding, reacting for 3h, then adding the rest of ethanol and benzoyl peroxide, continuing to react for 3h, cooling to 45 ℃ after the reaction is finished, dropwise adding triethylamine while stirring to adjust the pH until the system is neutral, continuing to react for 30min, and adding deionized water to prepare the modified acrylic resin, wherein the molar ratio of the mixed monomer to the functional monomer is controlled to be 4: 1, the amount of the benzoyl peroxide is 3% of the weight of the mixed monomer, the volume ratio of the ethanol to the deionized water is 1: 1, and the total amount of the ethanol and the deionized water is 50% of the weight of the mixed monomer and the functional monomer.
The mixed monomer is formed by mixing methyl methacrylate, butyl acrylate, hydroxyethyl acrylate and acrylic acid according to the molar ratio of 1: 1.
Example 3
The modified acrylic resin is prepared by the following steps:
adding difluorocatechol formal into a n-hexane solution of tert-butyl lithium at-70 ℃, reacting for 3 hours at the temperature, slowly dropwise adding a tetrahydrofuran solution of ethoxymethylene ethyl cyanoacetate, continuing to react for 1 hour, heating to room temperature, preserving heat for reaction for 2 hours, washing a reaction solution to be neutral after the reaction is finished, extracting with ethyl acetate, drying, and concentrating under reduced pressure to obtain an intermediate 1, wherein the dosage ratio of the difluorocatechol formal, the n-hexane solution of tert-butyl lithium and the tetrahydrofuran solution of ethoxymethylene ethyl cyanoacetate is controlled to be 7.1 g: 15 g: 50 mL;
adding the intermediate 1 into a four-neck flask, introducing nitrogen, maintaining the temperature of the system at 0 ℃, adding dichloromethane, cooling to-5 ℃, then adding potassium hydroxide and dichloromethane, stirring at a constant speed for 2 hours, slowly dropwise adding a dichloromethane solution of p-benzenesulfonylmethyl isonitrile, reacting at room temperature for 1 hour, filtering, washing with water, and recrystallizing after the reaction is finished to obtain the pyrrole compound, wherein the dosage ratio of the dichloromethane solution of the intermediate 1, dichloromethane, potassium hydroxide and p-benzenesulfonylmethyl isonitrile is controlled to be 5.6 g: 60 mL: 1.3 g: 20mL, and the volume ratio of the two dichloromethane additions is 1: 2.
The n-hexane solution of the tert-butyl lithium is prepared by mixing tert-butyl lithium and n-hexane according to the dosage ratio of 0.04 mol: 15 g.
The tetrahydrofuran solution of the ethoxy methylene ethyl cyanoacetate is formed by mixing the ethoxy methylene ethyl cyanoacetate and tetrahydrofuran according to the dosage ratio of 8.2g to 50 mL.
The dichloromethane solution of the p-benzenesulfonyl methyl isonitrile is prepared by mixing the p-benzenesulfonyl methyl isonitrile and dichloromethane according to the dosage ratio of 0.022 mol: 20 mL.
Adding a pyrrole compound into dimethyl sulfoxide, dropwise adding triethylamine to adjust the pH value until the pH value is 9, heating to 65 ℃, carrying out heat preservation reaction for 30min, adding glycidyl methacrylate, and stirring at a constant speed of 180r/min for 72h to prepare a functional monomer, wherein the dosage ratio of the pyrrole compound to the dimethyl sulfoxide is controlled to be 10 g: 50mL, and the molar ratio of the pyrrole compound to the glycidyl methacrylate is 1: 1.2;
adding 30% of mixed monomer and 25% of benzoyl peroxide into 25% of ethanol, stirring at a constant speed, heating to 85 ℃, carrying out heat preservation reaction for 10min, then adding the rest of mixed monomer, 25% of benzoyl peroxide and functional monomer, stirring after completely adding, reacting for 3h, then adding the rest of ethanol and benzoyl peroxide, continuing to react for 3h, cooling to 45 ℃ after the reaction is finished, dropwise adding triethylamine while stirring to adjust the pH until the system is neutral, continuing to react for 30min, and adding deionized water to prepare the modified acrylic resin, wherein the molar ratio of the mixed monomer to the functional monomer is controlled to be 4: 1, the amount of the benzoyl peroxide is 3% of the weight of the mixed monomer, the volume ratio of the ethanol to the deionized water is 1: 1, and the total amount of the ethanol and the deionized water is 50% of the weight of the mixed monomer and the functional monomer.
The mixed monomer is formed by mixing methyl methacrylate, butyl acrylate, hydroxyethyl acrylate and acrylic acid according to the molar ratio of 1: 1.
Example 4
An antibacterial water-based acrylic resin coating comprises the following raw materials in parts by weight: 25 parts of modified acrylic resin, 3 parts of polyacrylamide, 3 parts of polyvinylpyrrolidone, 3 parts of polysiloxane and 10 parts of deionized water;
the antibacterial water-based acrylic resin coating is prepared by the following steps:
adding polyacrylamide, polyvinylpyrrolidone and polysiloxane into deionized water, stirring at a high speed for 30min to obtain a mixed solution, adding modified acrylic resin into the mixed solution, heating to 65 ℃, mixing at a high speed for 3h, uniformly mixing, and cooling to room temperature to obtain the antibacterial water-based acrylic resin coating.
Example 5
An antibacterial water-based acrylic resin coating comprises the following raw materials in parts by weight: 28 parts of modified acrylic resin, 5 parts of polyacrylamide, 4 parts of polyvinylpyrrolidone, 4 parts of polysiloxane and 20 parts of deionized water;
the antibacterial water-based acrylic resin coating is prepared by the following steps:
adding polyacrylamide, polyvinylpyrrolidone and polysiloxane into deionized water, stirring at a high speed for 30min to obtain a mixed solution, adding modified acrylic resin into the mixed solution, heating to 70 ℃, mixing at a high speed for 4h, uniformly mixing, and cooling to room temperature to obtain the antibacterial water-based acrylic resin coating.
Example 6
An antibacterial water-based acrylic resin coating comprises the following raw materials in parts by weight: 32 parts of modified acrylic resin, 6 parts of polyacrylamide, 5 parts of polyvinylpyrrolidone, 5 parts of polysiloxane and 30 parts of deionized water;
the antibacterial water-based acrylic resin coating is prepared by the following steps:
adding polyacrylamide, polyvinylpyrrolidone and polysiloxane into deionized water, stirring at a high speed for 30min to obtain a mixed solution, adding modified acrylic resin into the mixed solution, heating to 75 ℃, mixing at a high speed for 4h, uniformly mixing, and cooling to room temperature to obtain the antibacterial water-based acrylic resin coating.
Comparative example 1
Compared with example 4, the comparative example uses the water-based acrylic resin as the base resin and KP-J80 antibacterial additive is added.
Comparative example 2
This comparative example is a comparison with comparative example 1, without the addition of an antimicrobial additive.
The antibacterial properties and antibacterial durability of the coating films prepared in examples 4 to 6 and comparative examples 1 to 2 were examined with reference to HG/T3950-2007, and the results are shown in the following tables 1 to 2:
TABLE 1
The coating after the antibacterial test is subjected to 100 times of ultrasonic oscillation cleaning according to HG/T3950-2007, and the antibacterial performance test of escherichia coli is performed after 30min each time, and the results are shown in the following table 2:
TABLE 2
It can be seen from tables 1 to 2 above that the coating films prepared in examples 4 to 6 of the present invention have not only excellent antibacterial properties but also good antibacterial durability.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (7)
1. An antibacterial water-based acrylic resin coating is characterized in that: the feed comprises the following raw materials in parts by weight: 25-32 parts of modified acrylic resin, 3-6 parts of polyacrylamide, 3-5 parts of polyvinylpyrrolidone, 3-5 parts of polysiloxane and 10-30 parts of deionized water;
the modified acrylic resin is prepared by the following steps:
step A1, adding a pyrrole compound into dimethyl sulfoxide, dropwise adding triethylamine to adjust the pH value until the pH value is 8-9, heating to 65 ℃, keeping the temperature to react for 30min, adding glycidyl methacrylate, and uniformly stirring at a rotation speed of 180r/min for 72h to obtain a functional monomer;
step A2, adding 30% of mixed monomer and 25% of benzoyl peroxide into 25% of ethanol, stirring at a constant speed, heating to 85 ℃, carrying out heat preservation reaction for 10min, then adding the rest of mixed monomer, 25% of benzoyl peroxide and functional monomer, stirring after completely adding, reacting for 3h, then adding the rest of ethanol and benzoyl peroxide, continuing to react for 3h, cooling to 45 ℃ after the reaction is finished, dropwise adding triethylamine while stirring to adjust the pH until the system is neutral, continuing to react for 30min, and adding deionized water to prepare the modified acrylic resin.
2. The antibacterial water-based acrylic resin coating as claimed in claim 1, wherein: the mixed monomer is formed by mixing methyl methacrylate, butyl acrylate, hydroxyethyl acrylate and acrylic acid according to the molar ratio of 1: 1.
3. The antibacterial water-based acrylic resin coating as claimed in claim 1, wherein: the pyrrole compound is prepared by the following steps:
step S1, adding difluorocatechol formal into a n-hexane solution of tert-butyl lithium at-70 ℃, reacting for 3 hours at the temperature, slowly dropwise adding a tetrahydrofuran solution of ethoxymethylene ethyl cyanoacetate, continuing to react for 1 hour, heating to room temperature, keeping the temperature for reaction for 2 hours, washing a reaction solution to be neutral after the reaction is finished, extracting, drying, and concentrating under reduced pressure to obtain an intermediate 1, wherein the dosage ratio of the difluorocatechol formal, the n-hexane solution of tert-butyl lithium and the tetrahydrofuran solution of ethoxymethylene ethyl cyanoacetate is controlled to be 6.8-7.1 g: 15 g: 50 mL;
step S2, adding the intermediate 1 into a four-neck flask, introducing nitrogen, maintaining the temperature of the system at 0 ℃, adding dichloromethane, cooling to-5 ℃, then adding potassium hydroxide and dichloromethane, stirring at a constant speed for 2h, slowly dropwise adding dichloromethane solution of p-benzenesulfonylmethyl isonitrile, reacting at room temperature for 1h, filtering, washing with water, and recrystallizing after the reaction is finished to obtain the pyrrole compound, wherein the dosage ratio of the dichloromethane solution of the intermediate 1, dichloromethane, potassium hydroxide and p-benzenesulfonylmethyl isonitrile is controlled to be 5.2-5.6 g: 60 mL: 1.2-1.3 g: 20mL, and the volume ratio of the two dichloromethane additions is 1: 2.
4. The antibacterial water-based acrylic resin coating as claimed in claim 3, wherein: the n-hexane solution of the tert-butyl lithium is prepared by mixing tert-butyl lithium and n-hexane according to the dosage ratio of 0.04 mol: 15 g.
5. The antibacterial water-based acrylic resin coating as claimed in claim 3, wherein: the tetrahydrofuran solution of the ethoxy methylene cyano ethyl acetate is formed by mixing the ethoxy methylene cyano ethyl acetate and tetrahydrofuran according to the dosage ratio of 8.0-8.2 g: 50 mL.
6. The antibacterial water-based acrylic resin coating as claimed in claim 3, wherein: the dichloromethane solution of the p-benzenesulfonyl methyl isonitrile is prepared by mixing the p-benzenesulfonyl methyl isonitrile and dichloromethane according to the dosage ratio of 0.02-0.022 mol: 20 mL.
7. The method for preparing an antibacterial water-based acrylic resin coating as claimed in claim 1, wherein the method comprises the following steps: the method comprises the following steps:
adding polyacrylamide, polyvinylpyrrolidone and polysiloxane into deionized water, stirring at a high speed for 30min to obtain a mixed solution, adding modified acrylic resin into the mixed solution, heating to 65-75 ℃, mixing at a high speed for 3-4h, uniformly mixing, and cooling to room temperature to obtain the antibacterial water-based acrylic resin coating.
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