Antimicrobial strengthened glass and preparation process thereof

Abstract

An antimicrobial strengthened glass and a preparation process thereof. The antimicrobial strengthened glass made from components including 30-50 parts of silicon dioxide, 10-20 parts of epoxy resin, 10-20 parts of titanium dioxide, 5-15 parts of nano bismuth oxide, 8-12 parts of boron oxide, 4-8 parts of chlorinated polyethylene, 2-6 parts of aluminum oxide, 1-3 parts of sodium oxide, 1-3 parts of manganese dioxide, 5-15 parts of graphite powder, 1-3 parts of barium sulfate, 2-4 parts of calcium hexaluminate, 1-3 parts of sodium fluorosilicate, 2-4 parts of borax decahydrate, 3-5 parts of sodium oxalate, 1-2 parts of sodium phosphate, 1-3 parts of sodium carbonate, 1-3 parts of potassium persulfate, 1-2 parts of potassium carbonate, 1-5 parts of ethylenediamine tetraacetic acid disodium, 1-5 parts of acrylamide, 0.01-1 part of silver nitrate and 0.01-1 parts of zinc sulfate.

Claims

1. A process for preparing an antimicrobial strengthened glass, comprising the steps of: (1) cutting: cutting a glass substrate prepared from components comprising 30-50 parts of silicon dioxide, 10-20 parts of epoxy resin, 10-20 parts of titanium dioxide, 5-15 parts of nano bismuth oxide, 8-12 parts of boron oxide, 4-8 parts of chlorinated polyethylene, 2-6 parts of aluminum oxide, 1-3 parts of sodium oxide, 1-3 parts of manganese dioxide, 5-15 parts of graphite powder, 1-3 parts of barium sulfate, 2-4 parts of calcium hexaluminate, 1-3 parts of sodium fluorosilicate, 2-4 parts of borax decahydrate, 3-5 parts of sodium oxalate, 1-2 parts of sodium phosphate, 1-3 parts of sodium carbonate, 1-3 parts of potassium persulfate, 1-2 parts of potassium carbonate, 1-5 parts of ethylenediamine tetraacetic acid disodium, 1-5 parts of acrylamide, 0.01-1 part of silver nitrate and 0.01-1 parts of zinc sulfate into a desired shape and size by using a cutting machine; (2) CNC carving: using a computer numerical control (CNC) machine to engrave a hole position of a corresponding model on the glass substrate after the cutting; (3) sweeping edge: polishing an edge of the glass substrate to make the edge have an arc; (4) ultrasonic cleaning: in a clean room, placing the glass substrate in an ultrasonic cleaner for cleaning; (5) physical strengthening: placing the glass substrate in a tempering furnace for physical strengthening, wherein a temperature of the tempering furnace is controlled at a first strengthening temperature of 600° C.-700° C. and a time of the physical strengthening is 5-60 minutes; (6) chemical strengthening: heating potassium nitrate to a second strengthening temperature of 380° C.-440° C. and chemically strengthening the physically strengthened glass substrate to obtain a strengthened glass body, wherein a time of the chemical strengthening is 5-30 minutes; (7) ion exchange: heating silver nitrate to a third ion exchange temperature of 350° C.-420° C. and performing the ion exchange on the chemically strengthened glass substrate to obtain an antimicrobial strengthened glass body, wherein a time of the ion exchange is 1-30 minutes; (8) coating a layer of multifunctional coating on an upper surface of the strengthened glass body to obtain a multifunctional coating layer; (9) coating a layer of optical adhesive on a lower surface of the strengthened glass body to obtain an optical adhesive layer; (10) arranging a substrate layer on a lower surface of the optical adhesive layer to obtain a strengthened glass.

2. The process for preparing the antimicrobial strengthened glass according to claim 1, wherein in the step (8), the multifunctional coating is prepared by mixing the following raw materials by weight: 20-40 parts of nano glass resin, 15-35 parts of waterborne acrylic acid styrene-acrylic emulsion, 15-25 parts of high gloss resin, 4-8 parts of polymethylsilsesquioxane, 3-7 parts of nano silicon dioxide, 2-6 parts of nano barium sulfate, 1-5 parts of laser ink, 1-3 parts of wax emulsion, 1-3 parts of film-forming auxiliary, 0.3-0.7 part of pH adjuster, 0.3-0.7 part of defoamer, 0.5-0.9 part of leveling agent, 0.4-0.8 part of dispersant, 0.6-1.0 part of wetting agent, 0.1-0.5 part of thickener and 10-20 parts of deionized water.

3. The process for preparing the antimicrobial strengthened glass according to claim 2, wherein the film-forming auxiliary is a mixture of texanol, diethylene glycol butyl ether and 2,2,4-trimethy-1,3-pentanediol monoisobutyrate in a weight ratio of 1:0.8-1.2:1.5-2.5.

4. The process for preparing the antimicrobial strengthened glass according to claim 2, wherein the pH adjuster is at least one selected from the group consisting of organic amine, sodium hydroxide, sodium hydrogencarbonate, ammonium hydrogencarbonate, and aqueous ammonia; a pH value of a reaction system is adjusted by using the pH adjuster.

5. The process for preparing the antimicrobial strengthened glass according to claim 2, wherein the defoamer is a mixture of polyoxypropylene glyceryl ether, sodium carboxymethylcellulose and silicon-containing polyether in a weight ratio of 1.5-2.5:0.8-1.2:1.

6. The process for preparing the antimicrobial strengthened glass according to claim 2, wherein the leveling agent is a mixture of polydimethylsiloxane, polyether polyester modified organosiloxane and alkyl modified organosiloxane in a weight ratio of 1:0.8-1.2:1.4-2.2.

7. The process for preparing the antimicrobial strengthened glass according to claim 2, wherein the wetting agent is a mixture of polyoxyethylene alkyl phenol ether, polyoxyethylene fatty alcohol ether and polyoxyethylene-polyoxypropylene block copolymer in a weight ratio of 1-2:0.5-1.5:1.

8. The process for preparing the antimicrobial strengthened glass according to claim 2, wherein the dispersant is a mixture of sodium lauryl sulfate, sodium poly[(naphthaleneformaldehyde)sulfonate] and dialkyl sodium sulfosuccinate in a weight ratio of 2-4:0.5-1.5:1.

9. The process for preparing the antimicrobial strengthened glass according to claim 2, wherein the thickener is a mixture of methylcellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose in a weight ratio of 1-2:0.5-1.5:1.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIGURE shows a flow chart of a preparation process of an antimicrobial strengthened glass.

DETAILED DESCRIPTION OF THE EMBODIMENTS

(2) The present invention will be further described hereinafter with reference to the accompanying drawing and embodiments.

(3) Embodiment I

(4) An antimicrobial strengthened glass is made from the following components capable of ion exchange by weight:

(5) 30-50 parts of silicon dioxide, 10-20 parts of epoxy resin, 10-20 parts of titanium dioxide, 5-15 parts of nano bismuth oxide, 8-12 parts of boron oxide, 4-8 parts of chlorinated polyethylene, 2-6 parts of aluminium oxide, 1-3 parts of sodium oxide, 1-3 parts of manganese dioxide, 5-15 parts of graphite powder, 1-3 parts of barium sulfate, 2-4 parts of calcium hexaaluminate, 1-3 parts of sodium fluorosilicate, 2-4 parts of borax decahydrate, 3-5 parts of sodium oxalate, 1-2 parts of sodium phosphate, 1-3 parts of sodium carbonate, 1-3 parts of potassium persulfate, 1-2 parts of potassium carbonate, 1-5 parts of ethylenediamine tetraacetic acid disodium, 1-5 parts of acrylamide, 0.01-1 part of silver nitrate and 0.01-1 parts of zinc sulfate.

(6) A process for preparing an antimicrobial strengthened glass including the steps of:

(7) (1) Cutting: cutting a glass substrate, where the glass substrate was prepared by components capable of ion exchange, into a desired shape and size by using a cutting machine;

(8) (2) CNC carving: using a computer numerical control (CNC) machine to engrave a hole position of the corresponding model on the glass substrate after cutting;

(9) (3) Sweeping edge: polishing an edge of the glass substrate to make the edge have a certain arc;

(10) (4) Ultrasonic cleaning: in a clean room, placing the glass substrate in an ultrasonic cleaner for cleaning;

(11) (5) Physical strengthening: placing the glass substrate in a tempering furnace for physical strengthening, wherein a temperature of the tempering furnace is controlled at a first strengthening temperature of 600° C.-700° C. and a time of the physical strengthening is a first time (T1) of 5-60 minutes;

(12) (6) Chemical strengthening: heating potassium nitrate to a second strengthening temperature of 380° C.-440° C. and chemically strengthening the physically strengthened glass substrate to obtain a strengthened glass body, wherein a time of the chemical strengthening is a second time (T2) of 5-30 minutes;

(13) (7) Ion exchange: heating silver nitrate to a third ion exchange temperature of 350° C.-420° C. and performing the ion exchange on the chemically strengthened glass substrate to obtain an antimicrobial strengthened glass body, wherein a time of the ion exchange is a third time (T3) of 1-30 minutes;

(14) (8) coating a layer of multifunctional coating on an upper surface of the strengthened glass body to obtain a multifunctional coating layer;

(15) (9) coating a layer of optical adhesive on a lower surface of the strengthened glass body to obtain an optical adhesive layer;

(16) (10) arranging a substrate layer on a lower surface of the optical adhesive layer to obtain a strengthened glass.

(17) Further, the strengthened glass body is removed from the chemical strengthening ion exchange bath after subjected to the chemical strengthening ion exchange bath in step (6). The strengthened glass body is transferred to the ion exchange bath for ion exchange. According to several exemplary embodiments, the ion exchange bath includes silver compound, such as a molten silver salt. According to several exemplary embodiments, the molten silver salt includes silver nitrate.

(18) In the ion exchange of step (7), the ion exchange bath further includes molten potassium nitrate having a substantially greater weight percentage than the silver salt. According to several exemplary embodiments, the ion exchange bath includes 99.0-99.99 wt % of potassium nitrate and 0.01-1.0 wt % of silver salt.

(19) During the operation, the strengthened glass body is placed in the ion exchange bath for a third time (T3) at a third ion exchange temperature (Temp3). The third time (T3) is substantially shorter than the first time (T1). According to several exemplary embodiments, the third time (T3) is less than 30 minutes. According to several exemplary embodiments, the third time (T3) is between 1 minute and 30 minutes, between 1 minute and 20 minutes, or between 1 minute and 10 minutes. The third ion exchange temperature (Temp3) is selected in consideration of the inclusion of silver for the antibacterial effect and the optical properties of the glass. According to several exemplary embodiments, the third ion exchange temperature (Temp3) is lower than the first strengthening temperature (Temp1) and the second strengthening temperature (Temp2). According to several exemplary embodiments, the third ion exchange temperature (Temp3) is between 350° C. and 420° C. According to several exemplary embodiments, each of the first, second and third temperatures is adjusted from 350° C. to 700° C.

(20) As described above, the formed glass has an antibacterial effect, a strengthened surface, and optimized optical properties. According to several exemplary embodiments, the compression layer has a compressive stress greater than 700 MPa and a thickness t1 greater than 5 μm.

(21) The above description is only the preferred embodiment(s) of the present invention, which is a further detailed description of the present invention in conjunction with the specific preferred embodiments. It should not be considered that the specific embodiments of the invention are limited to the description. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the present invention are intended to be included within the protective scope of the present invention.