阅读说明：本技术 一种纳米氧化锌抗菌涂层 (Nano zinc oxide antibacterial coating ) 是由 谭建岗 王聪聪 周曙 贲晓燕 赵强国 王亚飞 姜巨缙 于 2020-12-22 设计创作，主要内容包括：本发明公开了一种纳米氧化锌抗菌涂层,包括：氧化锌ZnO粉末、辅助杀菌剂、树脂、有机溶剂及光引发剂配置而成,各成分的重量份数分别为：氧化锌ZnO粉末0.1～20份、辅助杀菌剂5～30份、树脂0.5～20份、有机溶剂10～80份、光引发剂0.01～0.10份,各组分经离心分离、搅拌和乳化的分散方式形成抗菌液；抗菌液经精密涂布设备在塑料薄膜表面涂布抗菌液,经热固化和紫外线固化形成抗菌层。通过上述方式,本发明抗菌涂层硬度达到3H以上,耐划伤,使用寿命更长；采用热风固化+紫外光固化结合固化方式,完全固化,需要150-350 mJ/cm～2的能量,提高附着力、不易脱落,对大肠杆菌和金黄色葡萄球菌抗菌效果＞99.9%。(The invention discloses a nano zinc oxide antibacterial coatingA layer, comprising: the zinc oxide ZnO powder, the auxiliary bactericide, the resin, the organic solvent and the photoinitiator are prepared, and the zinc oxide ZnO powder comprises the following components in parts by weight: 0.1-20 parts of zinc oxide (ZnO) powder, 5-30 parts of auxiliary bactericide, 0.5-20 parts of resin, 10-80 parts of organic solvent and 0.01-0.10 part of photoinitiator, wherein each component is subjected to centrifugal separation, stirring and emulsification to form an antibacterial solution in a dispersion mode; and (3) coating the antibacterial liquid on the surface of the plastic film by using a precise coating device, and forming an antibacterial layer by thermosetting and ultraviolet curing. By the mode, the hardness of the antibacterial coating reaches more than 3H, the coating is scratch-resistant and has a longer service life; adopts a combination of hot air curing and ultraviolet curing for complete curing, and needs 150- 2 The energy of the paint improves the adhesive force, is not easy to fall off, and has the antibacterial effect of more than 99.9 percent on escherichia coli and staphylococcus aureus.)

1. A nano zinc oxide antibacterial coating is characterized by comprising: the zinc oxide ZnO powder, the auxiliary bactericide, the resin, the organic solvent and the photoinitiator are prepared, and the zinc oxide ZnO powder comprises the following components in parts by weight: 0.1-20 parts of zinc oxide ZnO powder, 5-30 parts of auxiliary bactericide, 0.5-20 parts of resin, 10-80 parts of organic solvent and 0.01-0.10 part of photoinitiator.

2. The nano zinc oxide antibacterial coating according to claim 1, wherein the auxiliary bactericide comprises one or more of 4, 5-dichloro-2-n-octyl-3-isothiazolinone DCOIT, quaternary phosphonium salt and quaternary ammonium salt mixed in any proportion.

3. The nano zinc oxide antibacterial coating according to claim 1, wherein the organic solvent comprises one or more of butanone, acetone, methyl isobutyl ketone, ethyl acetate, butyl acetate, benzene, toluene, xylene, ethanol, methanol and isopropanol mixed in any proportion.

4. The nano zinc oxide antibacterial coating according to claim 1, wherein the resin comprises one or more resins selected from amino resin, acrylic resin, polyacrylic resin, urethane acrylate, pentaerythritol triacrylate, trimethylolpropane triacrylate, hexanediol diacrylate, polyester resin, epoxy resin, polyamide resin, vinyl resin, and polyether resin mixed in any proportion.

5. The nano zinc oxide antibacterial coating according to claim 1, characterized in that the preparation method comprises the following steps:

1) mixing the components according to a ratio, and stirring to form an antibacterial solution;

2) coating the antibacterial liquid on the surface of the plastic film by adopting precise coating equipment to form a wet coating;

3) curing with hot air at 60-160 deg.C for 0.1-2min to form a primary cured coating;

4) then enters ultraviolet light for curing, the resin is cured by the photoinitiator, and the ultraviolet light curing energy is 150-²And finally forming the antibacterial layer coating.

6. The nano zinc oxide antibacterial coating according to claim 1, wherein the stirring time in step 1) is 10-50 min.

7. The nano zinc oxide antibacterial coating according to claim 1, wherein in step 2), the plastic film comprises PET, PVC, PE or PI, TPU.

8. The nano zinc oxide antibacterial coating according to claim 1, wherein in step 2), the thickness of the wet coating is 0.5-5 μm.

9. The nano zinc oxide antibacterial coating according to claim 1, wherein the preparation device comprises a stirrer, a coating device, a thermosetting system, a photo-curing system and a conveying device, the coating device, the thermosetting system and the photo-curing system are connected in series through a transmission device, wherein an outlet of the stirrer is connected with the coating device through a pipeline, the coating device forms a precoating layer on the surface of the plastic film, the conveying device conveys the precoating layer into the thermosetting system to form a primary cured coating, the conveying device conveys the primary cured coating into the photo-curing system to form an antibacterial layer, and an output end of the photo-curing system is connected with a winding system through the conveying device.

10. The nano zinc oxide antibacterial coating according to claim 9, wherein the coating apparatus is a micro gravure coating, comma roll coating, nip extrusion type coating apparatus, and the thickness of the wet coating is 0.5 to 5 μm.

Technical Field

The invention relates to a nano zinc oxide antibacterial coating.

Background

The application of antibacterial materials in daily life has been highly regarded, and the antibacterial materials have been applied to various fields, such as medical treatment, telecommunication communication products, household appliances, chemical building materials, food packaging daily necessities, aviation, bath equipment, toys and the like. Research and development of novel antibacterial materials with the characteristics of environmental protection, stability, high efficiency, durability and the like become the current research focus.

Wherein, the antibacterial coating is widely applied in life, but in the prior art, when the coating thickness of the antibacterial coating is 5-25 μm, common curing is adopted, and the energy is only 60-80 mJ/cm² The hardness of the antibacterial layer is only 1-2H, the adhesion is poor, the antibacterial layer is easy to fall off, and the antibacterial effect is seriously influenced.

Disclosure of Invention

The invention mainly solves the technical problem of providing the nano zinc oxide antibacterial coating which can improve the adhesive force of the antibacterial coating, is not easy to fall off and has better antibacterial effect.

In order to solve the technical problems, the invention adopts a technical scheme that: provided is a nano zinc oxide antibacterial coating, comprising: the zinc oxide ZnO powder, the auxiliary bactericide, the resin, the organic solvent and the photoinitiator are prepared, and the zinc oxide ZnO powder comprises the following components in parts by weight: 0.1-20 parts of zinc oxide ZnO powder, 5-30 parts of auxiliary bactericide, 0.5-20 parts of resin, 10-80 parts of organic solvent and 0.01-0.10 part of photoinitiator.

In a preferred embodiment of the present invention, the auxiliary bactericide comprises one or more of 4, 5-dichloro-2-n-octyl-3-isothiazolinone DCOIT, quaternary phosphonium salt and quaternary ammonium salt mixed in any proportion.

In a preferred embodiment of the present invention, the organic solvent includes one or more of butanone, acetone, methyl isobutyl ketone, ethyl acetate, butyl acetate, benzene, toluene, xylene, ethanol, methanol, and isopropanol mixed in any proportion.

In a preferred embodiment of the present invention, the resin includes one or more resins mixed in an arbitrary ratio among amino resin, acrylic resin, polyacrylic resin, urethane acrylate, pentaerythritol triacrylate, trimethylolpropane triacrylate, hexanediol diacrylate, polyester resin, epoxy resin, polyamide resin, vinyl resin, and polyether resin.

In a preferred embodiment of the present invention, the preparation method comprises the following steps:

1) mixing the components according to a ratio, and stirring to form an antibacterial solution;

2) coating the antibacterial liquid on the surface of the plastic film by adopting micro-concave coating to form a pre-coating layer;

3) curing with hot air at 60-160 deg.C for 0.1-2min to form a primary cured coating;

4) then enters ultraviolet light for curing, the resin is cured by the photoinitiator, and the ultraviolet light curing energy is 150-²And finally forming the antibacterial layer.

In a preferred embodiment of the invention, the stirring time in step 1) is 10-50 min.

In a preferred embodiment of the present invention, in step 2), the plastic film comprises PET, PVC, PE or PI.

In a preferred embodiment of the present invention, in step 2), the thickness of the pre-coating layer is 0.5-5 μm.

In a preferred embodiment of the invention, the preparation device comprises a stirrer, a coating device, a thermosetting system, a light curing system and a conveying device, wherein the coating device, the thermosetting system and the light curing system are connected in series through a transmission device, an outlet of the stirrer is connected with the coating device through a pipeline, the coating device forms a precoating layer on the surface of the plastic film, the conveying device conveys the precoating layer into the thermosetting system to form a primary cured coating, the conveying device conveys the primary cured coating into the light curing system to form an antibacterial layer, and an output end of the light curing system is connected with the winding system through the conveying device.

In a preferred embodiment of the invention, the coating device is an MG roll coating device, and the thickness of the pre-coating layer is 0.5-5 μm.

The invention has the beneficial effects that: the hardness of the antibacterial coating reaches more than 3H, the coating is scratch-resistant and has longer service life; adopts a combined curing mode of thermal curing and ultraviolet curing to completely cure, and needs 150-350 mJ/cm²The energy of the paint improves the adhesive force, is not easy to fall off, and has the antibacterial effect of more than 99.9 percent on escherichia coli and staphylococcus aureus.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a flow chart of a method for preparing a nano-zinc oxide antibacterial coating according to a preferred embodiment of the present invention;

fig. 2 is a schematic structural diagram of a device for preparing a nano zinc oxide antibacterial coating according to a preferred embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "front" and "back" and the like indicate orientations and positional relationships based on orientations and positional relationships shown in the drawings or orientations and positional relationships where the products of the present invention are conventionally placed in use, and are used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements to be referred must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, the first feature may be present on or under the second feature in direct contact with the first and second feature, or may be present in the first and second feature not in direct contact but in contact with another feature between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.

The embodiment of the invention comprises the following steps:

example 1:

a nano zinc oxide antimicrobial coating comprising: the nano zinc oxide ZnO powder, 4, 5-dichloro-2-n-octyl-3-isothiazolinone DCOIT, amino resin, methyl isobutyl ketone and photoinitiator are prepared, and the weight parts of the components are as follows: 0.2 part of nano zinc oxide ZnO powder, 6 parts of 4, 5-dichloro-2-n-octyl-3-isothiazolinone DCOIT, 0.6 part of amino resin, 11 parts of methyl isobutyl ketone and 0.02 part of photoinitiator.

Example 2:

a nano zinc oxide antimicrobial coating comprising: the nano zinc oxide ZnO powder is prepared from nano zinc oxide ZnO powder, quaternary phosphonium salt, amino resin, butanone and a photoinitiator, wherein the nano zinc oxide ZnO powder comprises the following components in parts by weight: 10 parts of nano zinc oxide ZnO powder, 15 parts of quaternary phosphonium salt, 2 parts of amino resin, 25 parts of butanone and 0.04 part of photoinitiator.

Example 3:

a nano zinc oxide antimicrobial coating comprising: the nano zinc oxide ZnO powder is prepared from nano zinc oxide ZnO powder, quaternary ammonium salt, amino resin, ethyl acetate and a photoinitiator, wherein the nano zinc oxide ZnO powder comprises the following components in parts by weight: 15 parts of nano zinc oxide ZnO powder, 20 parts of quaternary ammonium salt, 5 parts of polyacrylic resin, 5 parts of urethane acrylate, 60 parts of ethyl acetate and 0.05 part of photoinitiator.

Example 4: a nano zinc oxide antimicrobial coating comprising: the nano zinc oxide ZnO powder is prepared from nano zinc oxide ZnO powder, quaternary phosphonium salt, quaternary ammonium salt, amino resin, ethyl acetate, toluene and a photoinitiator, wherein the nano zinc oxide ZnO powder comprises the following components in parts by weight: 19 parts of nano zinc oxide ZnO powder, 29 parts of quaternary phosphonium salt and quaternary ammonium salt, 19 parts of amino resin, 79 parts of ethyl acetate and toluene and 0.10 part of photoinitiator.

The amino resin in examples 1 to 4 may be replaced with a resin in which one or more of acrylic resin, polyacrylic resin, urethane acrylate, pentaerythritol triacrylate, trimethylolpropane triacrylate, hexanediol diacrylate, polyester resin, epoxy resin, polyamide resin, vinyl resin, and polyether resin are mixed in an arbitrary ratio.

The preparation method of the nano zinc oxide antibacterial coating in the embodiments 1 to 4 includes the following steps, please refer to fig. 1:

1) the components are mixed according to the proportion, and the antibacterial liquid 1 is formed after stirring for 10-50 min.

2) The antibacterial liquid is coated on the surface of a plastic film by micro-concave coating to form a pre-coating layer 2, the thickness of the pre-coating layer 2 is 0.5-5 mu m, and the plastic film comprises PET, PVC, PE or PI.

3) Curing with hot air at 60-160 deg.C for 0.1-2min to obtain primary cured coating 3;

4) then enters into ultraviolet light for curing, the photoinitiator causes the resin to be cured 4, and the ultraviolet light curing energy is 150-350 mJ/cm²The hardness reaches more than 3H, and the anti-bacterial layer 5 is formed finally without falling off.

Referring to fig. 2, a preparation apparatus of a nano zinc oxide antibacterial coating includes a stirrer 6, a coating apparatus 7, a thermosetting system 8, a photo-curing system 9 and a conveyer 10, wherein the coating apparatus 7, the thermosetting system 8 and the photo-curing system 9 are connected in series through a transmission apparatus 10.

Wherein, the outlet of mixer 6 is connected with coating unit 7 through pipeline 11, and coating unit 7 forms the precoating layer on plastic film 12 surface, and conveyor 10 conveys the precoating layer to thermosetting system 8, forms the primary cured coating, and conveyor conveys the primary cured coating to photocuring system 9, forms antibiotic layer, and the output of photocuring system 9 is connected with rolling system 13 through conveyor 10.

The coating device 7 is an MG roller coating device, and the thickness of the pre-coating layer is 0.5-5 μm. By adopting the MG coating mode, the coating is more precise, and the antibacterial effect of more than 99.9 percent can be achieved only by 0.5-5 mu m.

The thermal curing system 8 is preferably a hot air oven curing, and the light curing system 9 is preferably an ultraviolet light irradiation curing. Adopts a combined curing mode of thermal curing and ultraviolet curing to completely cure, and needs 150-350 mJ/cm²The energy of the coating improves the adhesive force, is not easy to fall off, and has better antibacterial effect.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.