1. An antibacterial flexible coating with far infrared spectrum effect is characterized by comprising the following components in parts by weight: 30-70 parts of water-based polyurethane, 8-30 parts of frequency spectrum powder, 1-3 parts of flatting agent, 0.2-1 part of defoaming agent, 0.2-0.5 part of thickening agent and 2-4 parts of antibacterial agent, wherein the frequency spectrum powder comprises Al₂O₃-TiO₂-Cr₂O₃At least one of ceramic-like powder, carbon-like powder and silicate mineral powder.

2. The antimicrobial flexible coating of claim 1, wherein the carbon-based powder comprises at least one of graphene, carbon fiber, and carbon nanotubes.

3. The antimicrobial flexible coating of claim 1, wherein the silicate mineral powder comprises at least one of tourmaline powder, medical stone powder, ostrich stone powder, and diatomaceous earth powder.

4. The antimicrobial flexible coating of claim 1, wherein the antimicrobial agent is an aqueous solution of silver ions and/or a solution of a quaternary ammonium salt.

5. The antimicrobial flexible coating of claim 1, wherein the aqueous polyurethane is a one-part aqueous polyurethane, and the leveling agent is an acrylic leveling agent; the thickening agent is a solvent-free modified polyamide wax thickening agent; the defoaming agent is a polydimethylsiloxane type organic silicon defoaming agent.

6. A method for preparing an antibacterial flexible coating according to any one of claims 1 to 5, characterized by comprising the following steps:

s1, putting the frequency spectrum powder into a micro-nano level sand mill, and grinding the frequency spectrum powder to obtain the frequency spectrum powder with the grain size of less than 15 mu m;

and S2, sequentially adding the water-based polyurethane, the frequency spectrum powder, the cross-linking agent, the flatting agent, the dispersing agent, the thickening agent, the defoaming agent and the antibacterial agent in parts by weight, stirring and mixing at the stirring speed of 800-1000 r/min for 0.5-1 h, and taking out to obtain the antibacterial flexible coating.

7. The method of claim 6, wherein in step S1, the spectrum powder is ground in a grinder using 0.4mm zirconia balls.

8. Use of the antibacterial flexible coating according to any one of claims 1 to 5 for preparing an antibacterial flexible film.

9. The use according to claim 8, wherein the method of preparing the antimicrobial flexible film comprises the steps of:

1) putting a film material to be subjected to screen printing into plasma treatment equipment, treating for 5-6 min under the plasma treatment equipment with the rated power of 5000w, and taking out for later use;

2) coating the antibacterial flexible coating on the surface of the film material by adopting a screen printing mode, controlling the thickness of the antibacterial flexible coating to be 300 mu m by adopting a 100-mesh screen as a coating net, controlling the temperature to be 80 ℃, and entering the next procedure after film forming;

3) and (3) adopting a 300-mesh silk screen as a coating net to control the thickness of the antibacterial flexible coating to be 100 mu m and the temperature to be 80 ℃, and curling for later use after film forming to obtain the antibacterial flexible film.

10. The use of claim 9, wherein the method for preparing the antibacterial flexible film adopts a precise oven with a blowing and drying function and a hot air heating mode.

Background

The discovery of far infrared rays has been over 200 years old, and industrial and medical applications of far infrared rays have been explored in recent years. In the field of medical application, researchers have studied the biomedical effect of far infrared spectrum on human bodies, and have gradually developed a series of medical and health care devices such as far infrared bathrooms, far infrared irradiators, far infrared fitness devices, spectrum therapeutic instruments and the like. In view of domestic and foreign markets, the sales volume of far infrared materials and products thereof is increasing, the influence is expanding, the far infrared materials are spread among consumers, and new development potential is displayed continuously. In recent years, with the gradual improvement of living standard of people, the requirements on environmental protection and health of family environment and living space are gradually increased, and the health condition is more and more emphasized, so if a health care product with more far infrared spectrum effects can be developed, the health care product will be emphasized and favored by people, and the health care product has wide market prospect and application value.

The antibacterial effect is better and more emphasized in the far infrared health care field along with the further improvement of the self-protection meaning of modern human beings, and on the basis of the existing far infrared effect, high-efficiency antibacterial elements are introduced, so that the effect of a far infrared spectrum product can be further improved, and the far infrared spectrum product is more suitable for being used by human beings and better benefits the human beings.

The far infrared materials with the frequency spectrum effect are generally hard materials and can only be applied to the surfaces of fixed plates or other building materials, so that the invention provides the antibacterial flexible coating with the far infrared frequency spectrum effect, which can be coated on the surface of the flexible film, and can be well applied to wearable or other fields needing flexible materials to make up for the defects of related products in the market.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide an antibacterial flexible coating with far infrared spectrum efficacy, a preparation method and application thereof, which are used for solving the technical problems that the existing flexible coating and corresponding film products thereof do not have antibacterial efficacy and cannot be flexibly coated.

In order to achieve the purpose, the invention adopts the technical scheme that:

in a first aspect, the invention provides an antibacterial flexible coating with far infrared spectrum efficacy, which comprises the following components in parts by weight: 30-70 parts of water-based polyurethane, 8-30 parts of frequency spectrum powder, 1-3 parts of flatting agent, 0.2-1 part of defoaming agent, 0.2-0.5 part of thickening agent and 2-4 parts of antibacterial agent, wherein the frequency spectrum powder comprises Al₂O₃-TiO₂-Cr₂O₃At least one of ceramic-like powder, carbon-like powder and silicate mineral powder.

According to different effects, the invention can be prepared into an antibacterial flexible coating with far infrared spectrum effect, and Al is selected to be used in occasions requiring high spectrum effect₂O₃-TiO₂-Cr₂O₃The ceramic-like powder can radiate far infrared rays with the wavelength of 6-15 mu m at the room temperature of 20-50 ℃, the wavelength can be perfectly matched with the infrared absorption spectrum of a human body, and the ceramic-like powder can become a 'life heat ray' or a 'physiological heat ray' and has a plurality of benefits for the human body. In the occasion of needing high antibacterial requirement, the antibacterial agent and the carbon-based powder are selected, so that the antibacterial performance of the coating can be further improved on the basis of keeping the far infrared spectrum effect, and the coating is stable in shape and long in service life. Functional additives such as thickening agent, flatting agent and defoaming agent are added in the synthesis process, so that the structural strength and the processing characteristics of the coating material can be enhanced. The antibacterial flexible coating prepared from the components in parts by weight can be coated on the surface of a film, so that the film can be applied to wearable or other fields needing flexible materials.

As a preferred embodiment of the antibacterial flexible coating, the carbon-based powder includes at least one of graphene, carbon fiber, and carbon nanotube.

In a preferred embodiment of the antibacterial flexible coating according to the present invention, the silicate mineral powder includes at least one of tourmaline powder, medical stone powder, ostrich stone powder, and diatomaceous earth powder.

More preferably, the ceramic powder may also be chromium oxide green, aluminum oxide, titanium oxide, and zirconium oxide.

As a preferable embodiment of the antibacterial flexible coating layer of the present invention, the antibacterial agent is a silver ion aqueous solution and/or a quaternary ammonium salt solution.

The invention selects the water solution containing silver ions, the quaternary ammonium salt solution and the carbon powder, so that the antibacterial performance of the coating can be further improved on the basis of maintaining the far infrared spectrum effect, and the coating has stable shape and long service life.

As a preferred embodiment of the antibacterial flexible coating, the aqueous polyurethane is one-component aqueous polyurethane, and the leveling agent is an acrylic leveling agent; the thickening agent is a solvent-free modified polyamide wax thickening agent; the defoaming agent is a polydimethylsiloxane type organic silicon defoaming agent.

More preferably, the antibacterial flexible coating layer of the present invention further comprises additives such as a cross-linking agent, a dispersing agent, etc., and the above additives are not limited thereto. The cross-linking agent comprises at least one of trihydric alcohol, castor oil, trimethylolpropane and pentaerythritol.

In a second aspect, the invention provides a preparation method of the antibacterial flexible coating, which comprises the following steps:

s1, putting the frequency spectrum powder into a micro-nano level sand mill, and grinding the frequency spectrum powder to obtain the frequency spectrum powder with the grain size of less than 15 mu m;

and S2, sequentially adding the water-based polyurethane, the frequency spectrum powder, the cross-linking agent, the flatting agent, the dispersing agent, the thickening agent, the defoaming agent and the antibacterial agent in parts by weight, stirring and mixing at the stirring speed of 800-1000 r/min for 0.5-1 h, and taking out to obtain the antibacterial flexible coating.

The preparation method of the antibacterial flexible coating has the advantages of low cost, simple forming process and strong operability, and enhances the stability and the processing characteristics of the antibacterial flexible coating with the far infrared spectrum effect by limiting the adding sequence of the components in sequence.

In a preferred embodiment of the preparation method of the present invention, in step S1, the spectrum powder is ground in a grinder using 0.4mm zirconia balls.

In a third aspect, the invention provides the application of the antibacterial flexible coating in preparing an antibacterial flexible film.

As a preferred embodiment of the application of the present invention, the preparation method of the antibacterial flexible film comprises the following steps:

1) putting a film material to be subjected to screen printing into plasma treatment equipment, treating for 5-6 min under the plasma treatment equipment with the rated power of 5000w, and taking out for later use;

2) coating the antibacterial flexible coating on the surface of the film material by adopting a screen printing mode, controlling the thickness of the antibacterial flexible coating to be 300 mu m by adopting a 100-mesh screen as a coating net, controlling the temperature to be 80 ℃, and entering the next procedure after film forming;

3) and (3) adopting a 300-mesh silk screen as a coating net to control the thickness of the antibacterial flexible coating to be 100 mu m and the temperature to be 80 ℃, and curling for later use after film forming to obtain the antibacterial flexible film.

According to the invention, the prepared antibacterial flexible film has higher flexibility by adopting the process modes of plasma treatment and screen printing. Active ions on the surface of the film material can be further excited through plasma treatment, so that a coating layer is ensured to have a stronger binding effect; the method has the advantages that the antibacterial flexible coating can be uniformly and completely coated on the surface of the film in a screen printing mode, and finally, the functional layer with high strength, high stability and long service life is obtained in a coating film forming mode with far infrared spectrum efficacy twice, and the stable far infrared spectrum efficacy is realized, so that the method can be widely applied to the processing and manufacturing of daily related flexible products of people, such as clothes and gloves, spectrum health care products and the like.

As a preferable embodiment of the application of the invention, in the preparation method of the antibacterial flexible film, a precise oven with a blast drying function and a hot air heating mode are adopted.

Adopt the accurate oven that has the dry function of forced air and the mode of hot-air heating in the above-mentioned scheme, can ensure the surface temperature of the flexible coating of even control antibiotic, ensure that the flexible coating of antibiotic on film surface realizes from the even solidification of top layer to inside.

Compared with the prior art, the invention has the following beneficial effects:

1) the invention provides an antibacterial flexible coating with far infrared spectrum effect, which has better antibacterial effect and flexibility on the premise of ensuring that the coating has the far infrared spectrum effect;

2) the preparation method of the antibacterial flexible coating has the advantages of simple forming process and strong post-processing capability, and realizes numerous potential applications of the antibacterial flexible coating on far infrared spectrum products;

3) the antibacterial flexible coating is coated on the surface of the film in a screen printing mode, so that the coating and the flexible film material can be better combined, and the stability of the product is improved.

Detailed Description

To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.

In the following examples and comparative examples, the experimental methods used were conventional ones unless otherwise specified, and the materials, reagents and the like used were commercially available ones unless otherwise specified.

In the following examples and comparative examples, the acrylic leveling agent may be an acrylate leveling agent; the solvent-free modified polyamide wax thickener is a modified polyamide wax thickener, and the raw materials can be obtained from the market.

Embodiment 1, an antibacterial flexible coating and an antibacterial flexible film with far infrared spectrum effect

An antibacterial flexible coating with far infrared spectrum effect comprises the following components in parts by weight:

55 parts of waterborne polyurethane and Al₂O₃-TiO₂-ZrO₂20 parts of white ceramic powder (Al)₂O₃Powder 8 parts, TiO₂8 parts of powder and ZrO₂4 parts of powder), 3 parts of graphene, 1.5 parts of acrylic flatting agent, 0.8 part of polydimethylsiloxane type organic silicon defoaming agent, 2 parts of nonionic polyurethane dispersant,0.3 part of solvent-free modified polyamide wax thickening agent and 2 parts of silver ion aqueous solution with the concentration of 200 ppm.

The preparation method of the antibacterial flexible coating comprises the following steps:

s1, putting the frequency spectrum powder into a micro-nano-grade sand mill, and grinding the frequency spectrum powder in a turbine type grinding machine by adopting a zirconia ball with the diameter of 0.4mm to obtain the frequency spectrum powder with the particle size of less than 15 mu m;

s2, sequentially adding the aqueous polyurethane and Al in parts by weight₂O₃-TiO₂-ZrO₂The antibacterial flexible coating is prepared by stirring and mixing white ceramic powder, graphene, a cross-linking agent, an acrylic leveling agent, a nonionic polyurethane dispersant, a solvent-free modified polyamide wax thickener, a polydimethylsiloxane organosilicon defoaming agent and a silver ion water solution at the stirring speed of 900r/min for 0.5h, and then taking out the mixture to obtain the antibacterial flexible coating.

A preparation method of an antibacterial flexible film comprises the following steps:

1) a precise oven with a blast drying function and a hot air heating mode are adopted, so that the surface temperature of the coating can be uniformly controlled, and the uniform curing of the film coating from the surface layer to the inside is ensured;

2) putting a film material to be subjected to screen printing into plasma treatment equipment, treating for 5min under the plasma treatment equipment with the rated power of 5000w, and taking out for later use;

3) coating the prepared antibacterial flexible coating on the surface of a film material by adopting a screen printing mode, controlling the thickness of the antibacterial flexible coating to be 300 mu m by adopting a 100-mesh screen as a coating net, controlling the temperature of a precision oven to be 80 ℃, and entering the next process after film forming;

4) and (3) adopting a 300-mesh silk screen as a coating net to control the thickness of the antibacterial flexible coating to be 100 mu m, controlling the temperature of a precision oven to be 80 ℃, and curling for later use after film forming to obtain the antibacterial flexible film.

Embodiment 2, an antibacterial flexible coating and an antibacterial flexible film with far infrared spectrum effect

An antibacterial flexible coating with far infrared spectrum effect comprises the following components in parts by weight:

40 parts of water-based polyurethane, 2 parts of graphene, 25 parts of tourmaline powder, 1 part of carbon black, 1.5 parts of acrylic flatting agent, 0.8 part of polydimethylsiloxane type organic silicon defoaming agent, 1 part of nonionic polyurethane dispersant, 0.2 part of solvent-free modified polyamide wax thickener and 4 parts of silver ion water solution with the concentration of 200 ppm.

The preparation method of the antibacterial flexible coating comprises the following steps:

s1, putting the frequency spectrum powder into a micro-nano-grade sand mill, and grinding the frequency spectrum powder in a turbine type grinding machine by adopting a zirconia ball with the diameter of 0.4mm to obtain the frequency spectrum powder with the particle size of less than 15 mu m;

s2, sequentially adding the water-based polyurethane, the graphene, the tourmaline powder, the carbon black, the cross-linking agent, the acrylic leveling agent, the nonionic polyurethane dispersant, the solvent-free modified polyamide wax thickener, the polydimethylsiloxane organosilicon defoamer and the silver ion water solution in parts by weight, stirring and mixing at the stirring speed of 800r/min for 0.5h, and taking out to obtain the antibacterial flexible coating.

The antibacterial flexible film was prepared in the same manner as in example 1 except that it was coated with the antibacterial flexible coating prepared in example 2.

Example 3 an antimicrobial Flexible coating and an antimicrobial Flexible film with far Infrared Spectrum efficacy

An antibacterial flexible coating with far infrared spectrum effect comprises the following components in parts by weight:

40 parts of water-based polyurethane, 2 parts of graphene, 25 parts of chromium oxide green, 1 part of carbon black, 1.5 parts of an acrylic flatting agent, 1 part of a polydimethylsiloxane-type organic silicon defoaming agent, 1 part of a nonionic polyurethane dispersant, 0.2 part of a solvent-free modified polyamide wax thickener and 4 parts of a silver ion water solution with the concentration of 200 ppm.

The preparation method of the antibacterial flexible coating comprises the following steps:

s1, putting the frequency spectrum powder into a micro-nano-grade sand mill, and grinding the frequency spectrum powder in a turbine type grinding machine by adopting a zirconia ball with the diameter of 0.4mm to obtain the frequency spectrum powder with the particle size of less than 15 mu m;

and S2, sequentially adding the water-based polyurethane, the graphene, the chromium oxide green, the carbon black, the cross-linking agent, the acrylic leveling agent, the nonionic polyurethane dispersant, the solvent-free modified polyamide wax thickening agent, the polydimethylsiloxane organosilicon defoaming agent and the silver ion water solution in parts by weight, stirring and mixing at the stirring speed of 800r/min, and taking out after 0.5h to obtain the antibacterial flexible coating.

The antibacterial flexible film was prepared in the same manner as in example 1 except that it was coated with the antibacterial flexible coating prepared in example 3.

Example 4 an antimicrobial Flexible coating and an antimicrobial Flexible film with far Infrared Spectrum efficacy

An antibacterial flexible coating with far infrared spectrum effect comprises the following components in parts by weight:

30 parts of water-based polyurethane, 2 parts of graphene, 27 parts of medical stone powder, 1 part of carbon black, 1 part of acrylic leveling agent, 0.2 part of polydimethylsiloxane organosilicon defoaming agent, 2 parts of nonionic polyurethane dispersant, 0.2 part of solvent-free modified polyamide wax thickener and 3 parts of silver ion water solution with the concentration of 200 ppm.

The preparation method of the antibacterial flexible coating comprises the following steps:

s1, putting the frequency spectrum powder into a micro-nano-grade sand mill, and grinding the frequency spectrum powder in a turbine type grinding machine by adopting a zirconia ball with the diameter of 0.4mm to obtain the frequency spectrum powder with the particle size of less than 15 mu m;

and S2, sequentially adding the water-based polyurethane, the medical stone powder, the graphene, the carbon black, the cross-linking agent, the acrylic leveling agent, the nonionic polyurethane dispersant, the solvent-free modified polyamide wax thickening agent, the polydimethylsiloxane organosilicon antifoaming agent and the silver ion water solution in parts by weight, stirring and mixing at the stirring speed of 1000r/min, and taking out after 0.5h to obtain the antibacterial flexible coating.

The antibacterial flexible film was prepared in the same manner as in example 1 except that it was coated with the antibacterial flexible coating prepared in example 4.

Embodiment 5, an antibacterial flexible coating and an antibacterial flexible film with far infrared spectrum effect

An antibacterial flexible coating with far infrared spectrum effect comprises the following components in parts by weight:

70 parts of aqueous polyurethane and Al₂O₃-TiO₂-ZrO₂2 parts of white ceramic powder (Al)₂O₃Powder 1 part, TiO₂0.5 part of powder and ZrO₂0.5 part of powder), 1 part of graphene, 1 part of acrylic leveling agent, 0.2 part of polydimethylsiloxane type organic silicon defoaming agent, 1 part of nonionic polyurethane dispersant, 0.2 part of solvent-free modified polyamide wax thickening agent and 2 parts of quaternary ammonium salt solution with the concentration of 200 ppm.

The preparation method of the antibacterial flexible coating comprises the following steps:

s1, putting the frequency spectrum powder into a micro-nano-grade sand mill, and grinding the frequency spectrum powder in a turbine type grinding machine by adopting a zirconia ball with the diameter of 0.4mm to obtain the frequency spectrum powder with the particle size of less than 15 mu m;

s2, sequentially adding the aqueous polyurethane and Al in parts by weight₂O₃-TiO₂-ZrO₂The antibacterial flexible coating is prepared by stirring and mixing white ceramic powder, graphene, a cross-linking agent, an acrylic leveling agent, a nonionic polyurethane dispersant, a solvent-free modified polyamide wax thickener, a polydimethylsiloxane organosilicon defoaming agent and a silver ion water solution at the stirring speed of 1000r/min for 0.5h, and then taking out the mixture to obtain the antibacterial flexible coating.

The antibacterial flexible film was prepared in the same manner as in example 1 except that it was coated with the antibacterial flexible coating prepared in example 5.

Comparative example 1

A commercially available flexible film was selected as a comparative example and purchased from Hangzhou gao olefin technologies, Inc.

Comparative example 2

The difference compared to example 1 is that the antimicrobial flexible coating does not contain Al₂O₃-TiO₂-ZrO₂The graphene powder is white ceramic powder, the weight part of the graphene is 23 parts, and other steps and parameters are the same as those of the embodiment 1.

Comparative example 3

Compared with the example 1, the difference is that the preparation method of the antibacterial flexible film does not comprise the step 2), and other steps and parameters are the same as the example 1.

Test example I, comparison of antibacterial Flexible film Properties

The films of examples 1 to 5 and comparative examples 1 to 3 were tested for their antimicrobial properties, flexibility and adhesion according to the test standards GB/T21866 and GB/T7287, the results of which are shown in Table 1.

Table 1 comparison of performance test data for examples and comparative examples

As can be seen from table 1, the antibacterial flexible films prepared by the embodiments (examples 1 to 5) of the present invention have excellent antibacterial performance, and the antibacterial rate is higher than 99.99%, which is significantly improved compared to the common film material. The antibacterial flexible coating has more excellent performance by combining with the judgment of the flexible performance.

Compared with the example 1, the flexible film sold in the comparative example 1 has the antibacterial rate (escherichia coli and staphylococcus aureus) of 0, and obvious bending marks appear through the test standard, which shows that the antibacterial flexible film provided by the invention has better antibacterial and flexible effects.

The antibacterial flexible coating of the comparative example 2 reduces components, the flexible efficacy of the antibacterial flexible coating is inferior to that of the examples 1-5, the preparation method of the antibacterial flexible film of the comparative example 3 does not comprise the step 2), the plasma treatment step is lacked, and the film is easy to have bending marks and coating falling conditions.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.