CN103909699A - Coated member and making method thereof - Google Patents

Abstract

A kind of coating part, it comprises base material, the antibacterial layer that is formed on the surface of base material and the antifingerprint layer that is formed on the surface of antibacterial layer, contains the silicon oxide that has nanoscale hole and the antibacterial material that is supported on the silicon oxide in this antibacterial layer , the antibacterial material contains at least one of nano-silver ions, nano-copper ions, and at least one of nano-titanium dioxide, nano-zinc oxide, and nano-copper oxide, the anti-fingerprint layer is a fluoropolyether silane layer, and the anti-fingerprint The layer has a thickness such that the antimicrobial material in the antimicrobial layer is freed to the surface of the antifingerprint layer. In addition, the present invention also provides a preparation method of the coating part. The surface of the coating part has good antifouling and antibacterial effects.

Description

Coated parts and preparation method thereof

technical field

The invention relates to a coating piece and a preparation method thereof.

Background technique

Currently, smart phones and tablet computers are favored by more and more consumers. When using a smart phone or a tablet computer, the user often needs to touch the touch screen of the smart phone or tablet computer with fingers, so that various dirt such as sweat and oil on the fingers are easily transferred and adhered to the touch screen. Various stains form on the surface of the touch screen. In addition, if the stains on the touch screen cannot be cleaned and removed in time, microorganisms such as bacteria will easily breed.

Contents of the invention

In view of this, it is necessary to provide a coating with antifouling and antibacterial surface.

In addition, it is also necessary to provide a method for preparing the above-mentioned coated piece.

A kind of coating part, it comprises base material, the antibacterial layer that is formed on the surface of base material and the antifingerprint layer that is formed on the surface of antibacterial layer, contains the silicon oxide that has nanoscale hole and the antibacterial material that is supported on the silicon oxide in this antibacterial layer , the antibacterial material contains at least one of nano-silver ions, nano-copper ions, and at least one of nano-titanium dioxide, nano-zinc oxide, and nano-copper oxide, the anti-fingerprint layer is a fluoropolyether silane layer, and the anti-fingerprint The layer has a thickness such that the antimicrobial material in the antimicrobial layer is freed to the surface of the antifingerprint layer.

A kind of preparation method of coating piece, it comprises the steps:

The antibacterial material is added into an organic solvent to disperse to obtain a colloid, the colloid is mixed with silicon oxide having nanoscale pores, and the organic solvent is removed and then heat-treated to obtain a nanocomposite material. The antibacterial material contains at least one of nano-silver ions and nano-copper ions. species, and at least one of nano-titanium dioxide, nano-zinc oxide, and nano-copper oxide;

Provide the substrate;

Using the method of evaporative coating, the nanocomposite material is used as the evaporation material, and the nanocomposite material is deposited on the surface of the substrate to form an antibacterial layer. The antibacterial layer contains silicon oxide with nanoscale pores and antibacterial materials loaded on the silicon oxide. ;

Adopt the method of evaporative coating, use perfluoropolyether silane as evaporation material, deposit perfluoropolyether silane on the surface of antibacterial layer to form an anti-fingerprint layer, the thickness of this anti-fingerprint layer is to make the antibacterial material in the antibacterial layer Free to the surface of the anti-fingerprint layer.

The coating part of the present invention deposits an antibacterial layer and an anti-fingerprint layer on the surface of the substrate in sequence. During the use of the coating part, the antibacterial materials in the antibacterial layer, especially nanometer metal ions, are easily released to the surface of the anti-fingerprint layer. Play an antibacterial effect, so that the surface of the coating part has a good antifouling and antibacterial effect.

Description of drawings

Fig. 1 is a cross-sectional view of a coating member according to a preferred embodiment of the present invention.

FIG. 2 is a schematic diagram of a vacuum evaporation machine used in a method of manufacturing a coating member according to a preferred embodiment of the present invention.

Description of main component symbols

Coated parts 10 Substrate 11 antibacterial layer 13 anti-fingerprint layer 15 Vacuum evaporation machine 200 Evaporation chamber 210 Evaporation source 211 support frame 213 Air channel 215 evaporation material 217 vacuum pump 230

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

Detailed ways

Referring to FIG. 1 , a coating member 10 according to a preferred embodiment of the present invention includes a substrate 11 , an antibacterial layer 13 formed on the surface of the substrate 11 , and an antifingerprint layer 15 formed on the surface of the antibacterial layer 13 .

The material of the substrate 11 can be glass, ceramics, metal or plastic.

The antibacterial layer 13 contains silicon oxide and antibacterial materials loaded on the silicon oxide, and its thickness is 0.01-10 μm. The antibacterial material contains at least one of nano-silver ions, nano-copper ions, and at least one of nano-titanium dioxide, nano-zinc oxide, and nano-copper oxide. The antibacterial material preferably contains nano-silver ions and nano-titanium dioxide. The mass of the antibacterial material in the antibacterial layer 13 is 0.1%-10% of the mass of silicon oxide. The antibacterial layer 13 has excellent antibacterial properties against Escherichia coli, Staphylococcus aureus, Candida albicans and the like.

The anti-fingerprint layer 15 is a fluoropolyether silane layer. The thickness of the anti-fingerprint layer 15 is extremely small, and the antibacterial materials in the antibacterial layer 13, especially nanometer metal ions, are easily released to play an antibacterial effect. The thickness of the anti-fingerprint layer 15 is preferably 10-20 nm. The anti-fingerprint layer 15 has good water repellency, oil repellency, and dirt repellency, so that the coating member 10 has a good antifouling effect.

The preparation method of coating member 10 of the present invention, it comprises the steps:

(1) Add the antibacterial material to the organic solvent to disperse the colloid. The antibacterial material contains at least one of nano-silver ions, nano-copper ions, and at least one of nano-titanium dioxide, nano-zinc oxide, and nano-copper oxide. The organic solvent is preferably ethanol, but not limited to ethanol. The mass ratio of the antibacterial material to the organic solvent in the colloid is 1:1-1:100.

(2) Mix the above-mentioned colloid with silicon oxide having nanoscale pores, remove the organic solvent, and perform heat treatment to obtain a nanocomposite material. The heat treatment is at 300-500° C. for 0.5-5 hours. The antibacterial material in the nanocomposite material is loaded on silicon oxide, which can greatly improve the utilization rate of the antibacterial material. The mass of the antibacterial material contained in the colloid is 0.1%-10% of the mass of silicon oxide. The nanocomposite material is used as the raw material for subsequent evaporation coating.

(3) A base material 11 is provided, and the base material 11 has been cleaned and dried in advance. The material of the substrate 11 can be glass, ceramics, metal or plastic.

(4) Deposit nanocomposite materials on the surface of the substrate to form an antibacterial layer 13 by means of evaporation coating. The antibacterial layer 13 contains silicon oxide and antibacterial materials supported on the silicon oxide.

This step uses the vacuum evaporation machine 200 as shown in Figure 2, and this vacuum evaporation machine 200 comprises an evaporation chamber 210 and is connected with a vacuum pump 230 of evaporation chamber 210, and this vacuum pump 230 is used for the evaporation chamber 210 Vacuum. The evaporation chamber 210 is provided with an evaporation source 211 , a supporting frame 213 opposite to the evaporation source 211 , and a gas source channel 215 . The base material 11 is fixed on the supporting frame 213 . The evaporation source 211 is used to heat the evaporation material 217 placed therein, so that the evaporation material 217 is melted, evaporated or sublimated to generate steam, and then the substrate 11 is coated. Gas enters the evaporation chamber 210 through the second gas source channel 215 . Wherein, the evaporation material 217 is the nanocomposite material.

The vacuum degree in the evaporation chamber 210 is set to be above 10 ⁻⁴ torr, the temperature is set to 60-80° C., and the composite material is evaporated at a speed of 0.2 nm/second. The antibacterial layer 13 has a thickness of 0.01-10 μm.

(5) The method of evaporation coating is adopted, and perfluoropolyether silane is used as the evaporation material, and perfluoropolyether silane is deposited on the surface of the antibacterial layer 13 to form an anti-fingerprint layer 15 . The anti-fingerprint layer 15 has a thickness of 10-20nm. In this step, a vacuum evaporation machine is used, and the vacuum degree in the evaporation chamber 210 is set to be above 10 ⁻⁵ torr, the evaporation current is 60-80 mA, and the perfluoropolyether silane is evaporated at a speed of 0.3 nm/second. The anti-fingerprint layer 15 has a thickness of 10-20nm.

In the coating member 10 of the present invention, the antibacterial layer 13 and the anti-fingerprint layer 15 are sequentially deposited on the surface of the substrate 11, so that the surface of the coating member 10 has good antifouling and antibacterial effects.

The present invention will be described in detail below by way of examples.

Example 1

The antibacterial material is added into an organic solvent to disperse the colloid. The antibacterial material contains nano-silver ions and nano-titanium dioxide. The organic solvent is ethanol, and the mass ratio of the antibacterial material to the organic solvent is 1:50.

The above colloid was composited with silicon oxide with nanoscale pores, and the organic solvent was evaporated to remove the organic solvent. Then, the temperature was raised to 400°C in a muffle furnace for 2 hours to prepare a nanocomposite material, in which the mass of the antibacterial material was 2.0% of the mass of the silicon oxide.

The material of the substrate 11 used in this embodiment is glass.

Adopt the method of evaporative coating, deposit nano-composite material on the surface of substrate 11 to form an antibacterial layer 13, set the vacuum degree in the vacuum evaporation machine to be 5× ^10-5 torr, the temperature is 80°C, and evaporate at a speed of 0.2nm/second. plate the composite. The antibacterial layer 13 has a thickness of 100 nm.

The evaporation coating method is adopted, and the perfluoropolyether silane is used as the evaporation material to deposit perfluoropolyether silane on the surface of the antibacterial layer 13 to form an anti-fingerprint layer 15 . The vacuum degree in the evaporation chamber 210 is set to be above 3×10 ⁻⁵ torr, the evaporation current is set to 70 mA, and the perfluoropolyether silane is evaporated at a speed of 0.3 nm/second. The anti-fingerprint layer 15 has a thickness of 15 nm.

Performance test: drop water on the coating surface of the coating piece 10, and use a contact angle meter to test the contact angle between the surface of the coating piece 10 and water; use a friction coefficient tester (Labthink MXD-01) to test the friction of the coating surface of the coating piece 10 Coefficient of friction; use a pencil hardness tester to test the hardness of the coating surface of the coating part 10; the test method of the antibacterial rate is: the coating part 10 is cut into an area size of 1 * ^3cm , immersed in a certain concentration of bacteria solution and oscillatingly mixed. Curing at 36°C for 6h, then diluting each sample to measure the number of viable bacteria, that is, inoculating the bacterial liquid into a petri dish, cultivating at 36°C for 24h, and observing the growth and reproduction of the colony. By comparing the bacterial concentration before and after sterilization, the final sterilization rate is calculated.

The performance test results of the coating member 10 prepared in this embodiment are shown in Table 1.

Table I

Measurement items data result Water contact angle/° 112 Water contact angle after 3500 frictions/° 108 coefficient of friction 0.18 Pencil hardness/500gf 9H Escherichia coli sterilization rate/% 99.9 Staphylococcus aureus sterilization rate/% 99.8 Candida albicans sterilization rate/% 99.9

From the test results in Table 1, it can be seen that the surface of the coating member 10 has good antifouling and antibacterial effects.

Example 2

The colloid is obtained by adding the antibacterial material into an organic solvent to disperse. The antibacterial material contains nano-silver ions and nano-titanium dioxide. The organic solvent is ethanol, and the mass ratio of the antibacterial material to the organic solvent is 1:100.

The above colloid was composited with silicon oxide with nanoscale pores, and the organic solvent was evaporated to remove the organic solvent. Then, the temperature was raised to 350°C in a muffle furnace for 2.5 hours to prepare a nanocomposite material, in which the mass of the antibacterial material was 2.5% of the mass of the silicon oxide.

The material of the substrate 11 used in this embodiment is glass.

Adopt the method of evaporation coating, deposit nano-composite material on the surface of substrate 11 to form an antibacterial layer 13, set the vacuum degree in the vacuum evaporation machine to be 5 × 10 ^-5 torr, the temperature is 70 ℃, evaporate at a speed of 0.2nm/second plate the composite. The antibacterial layer 13 has a thickness of 100 nm.

The evaporation coating method is adopted, and the perfluoropolyether silane is used as the evaporation material to deposit perfluoropolyether silane on the surface of the antibacterial layer 13 to form an anti-fingerprint layer 15 . The vacuum degree in the evaporation chamber 210 is set to be above 3×10 ⁻⁵ torr, the evaporation current is set to 80 mA, and the perfluoropolyether silane is evaporated at a speed of 0.3 nm/second. The anti-fingerprint layer 15 has a thickness of 20nm.

The test was performed with reference to the test method in Example 1, and the performance test results of the coating member 10 prepared in this example are shown in Table 2.

Table II

Measurement items data result Water contact angle/ ^o 112 Water contact angle after 3500 frictions/ ^o 107 coefficient of friction 0.22 Pencil hardness/500gf 9H Escherichia coli sterilization rate/% 99.9 Staphylococcus aureus sterilization rate/% 99.9 Candida albicans sterilization rate/% 99.9

From the test results in Table 2, it can be seen that the surface of the coating member 10 has good antifouling and antibacterial effects.

In addition, those skilled in the art can also make various modifications, additions and substitutions in other forms and details within the scope and spirit disclosed in the claims of the present invention. Certainly, the various modifications, additions, substitutions and other changes made according to the spirit of the present invention shall all be included within the scope of protection claimed by the present invention.

Claims (11)

1. A coating part, which comprises a base material, is characterized in that: the coating part also includes an anti-fingerprint layer formed on the surface of the base material and an anti-fingerprint layer formed on the surface of the anti-bacterial layer, and the anti-fingerprint layer with nanoscale holes is contained in the anti-bacterial layer Silicon oxide and an antibacterial material loaded on silicon oxide, the antibacterial material contains at least one of nano-silver ions, nano-copper ions, and at least one of nano-titanium dioxide, nano-zinc oxide, and nano-copper oxide, the anti-fingerprint layer It is a fluoropolyether silane layer, and the anti-fingerprint layer has a thickness such that the anti-bacterial material in the anti-bacterial layer can be freed to the surface of the anti-fingerprint layer. 2. The film-coated part according to claim 1, characterized in that: the material of the substrate is glass, ceramics, metal or plastic. 3. The film-coated component according to claim 1, characterized in that: the thickness of the antibacterial layer is 0.01-10 μm. 4. The film-coated part according to claim 1, characterized in that: the mass of the antibacterial material in the antibacterial layer is 0.1%-10% of the mass of silicon oxide. 5. The film-coated part according to claim 1, characterized in that: the anti-fingerprint layer has a thickness of 10-20 nm. 6. A preparation method for a coated film, comprising the steps of: The antibacterial material is added into an organic solvent to disperse to obtain a colloid, the colloid is mixed with silicon oxide having nanoscale pores, and the organic solvent is removed and then heat-treated to obtain a nanocomposite material. The antibacterial material contains at least one of nano-silver ions and nano-copper ions. species, and at least one of nano-titanium dioxide, nano-zinc oxide, and nano-copper oxide; Provide the substrate; Using the method of evaporative coating, the nanocomposite material is used as the evaporation material, and the nanocomposite material is deposited on the surface of the substrate to form an antibacterial layer. The antibacterial layer contains silicon oxide with nanoscale pores and antibacterial materials loaded on the silicon oxide. ; Adopt the method of evaporative coating, use perfluoropolyether silane as evaporation material, deposit perfluoropolyether silane on the surface of antibacterial layer to form an anti-fingerprint layer, the thickness of this anti-fingerprint layer is to make the antibacterial material in the antibacterial layer Free to the surface of the anti-fingerprint layer. 7 . The method for preparing a film-coated part according to claim 6 , wherein the mass ratio of the antibacterial material to the organic solvent in the colloid is 1:1-1:100. 8 . The method for preparing a coated part as claimed in claim 6 , wherein the step of preparing the nanocomposite material by heat treatment is specifically keeping the temperature at 300-500° C. for 0.5-5 hours. 9 . The method for preparing a coated piece according to claim 6 , wherein the mass of the antibacterial material contained in the colloid is 0.1%-10% of the mass of silicon oxide. 10. The method for preparing a film-coated part according to claim 6, characterized in that: the thickness of the antibacterial layer is 0.01-10 μm. 11. The method for preparing a film-coated part according to claim 6, characterized in that: the anti-fingerprint layer has a thickness of 10-20 nm.