阅读说明：本技术 一种蓝宝石玻璃抛光后的清洗方法 (Method for cleaning polished sapphire glass ) 是由 聂均红 夏永光 王芳 于 2021-10-08 设计创作，主要内容包括：本发明涉及一种蓝宝石玻璃抛光后的清洗方法,属于蓝宝石玻璃清洗技术领域。为了解决现有的清洗效率和不易清洗的问题,提供一种蓝宝石玻璃抛光后的清洗方法,该方法包括将经过抛光后的蓝宝石玻璃放入酸性清洗剂的水溶液中并控制温度在70℃～80℃的条件下进行清洗处理一；再将蓝宝石玻璃放入碱性清洗剂的水溶液中并控制温度在70℃～80℃的条件下进行清洗处理二,结束后再用纯水清洗,得到清洗后的蓝宝石玻璃。本发明能够实现高效清洗的优点；且清洗后蓝宝石玻璃的表面的水滴角≤15゜,具有很低的水滴角,实现蓝宝石玻璃表面高洁净度的效果。(The invention relates to a method for cleaning polished sapphire glass, and belongs to the technical field of sapphire glass cleaning. In order to solve the problems of the prior cleaning efficiency and difficult cleaning, the method for cleaning the polished sapphire glass comprises the steps of putting the polished sapphire glass into an aqueous solution of an acid cleaning agent, and cleaning at 70-80 ℃; and then putting the sapphire glass into an aqueous solution of an alkaline cleaning agent, controlling the temperature to be 70-80 ℃, carrying out cleaning treatment II, and then cleaning with pure water to obtain the cleaned sapphire glass. The invention can realize the advantage of high-efficiency cleaning; and the water drop angle of the surface of the sapphire glass after cleaning is less than or equal to 15 degrees, so that the water drop angle is very low, and the effect of high cleanliness of the surface of the sapphire glass is realized.)

1. A method for cleaning polished sapphire glass is characterized by comprising the following steps:

A. putting the polished sapphire glass into an aqueous solution of an acidic cleaning agent, and performing cleaning treatment I under the condition of controlling the temperature to be 70-80 ℃; the acidic cleaning agent comprises the following components in percentage by mass:

fatty alcohol polyoxyethylene ether: 8% -14%; 2-hydroxypropionic acid: 10% -15%; tartaric acid: 8% -13%; sodium sulfate: 6 to 10 percent; the balance of solvent;

B. b, putting the sapphire glass treated in the step A into an aqueous solution of an alkaline cleaning agent, controlling the temperature to be 70-80 ℃, performing cleaning treatment II, and cleaning with pure water after the cleaning treatment to obtain the cleaned sapphire glass;

the alkaline cleaning agent comprises the following components in percentage by mass:

glycerol polyoxyethylene polyoxypropylene ether: 2% -5%; sodium carbonate: 10% -16%; alkali metal hydroxide: 11% -16%; propylene glycol: 10% -15%; potassium monoalkyl ether phosphate ester: 2% -5%; sodium glutamate: 2% -5%; the balance being solvent.

2. The method for cleaning the polished sapphire glass according to claim 1, wherein the mass percent of the acidic cleaning agent in the aqueous solution of the acidic cleaning agent in the step A is 10-15%.

3. The method for cleaning the polished sapphire glass according to claim 1, wherein the first cleaning treatment in step a is an ultrasonic cleaning treatment, and the time of the ultrasonic cleaning treatment is 200 to 300 seconds.

4. The method for cleaning the polished sapphire glass according to claim 1, 2 or 3, wherein the mass percent of the alkaline cleaner in the aqueous solution of the alkaline cleaner in the step B is 8.0-12%.

5. The method for cleaning the polished sapphire glass according to claim 4, wherein the second cleaning treatment in the step B is ultrasonic cleaning treatment, and the time of the ultrasonic cleaning treatment is 200 to 300 seconds.

6. The method for cleaning the polished sapphire glass according to claim 4, wherein the alkali metal hydroxide is selected from sodium hydroxide and/or potassium hydroxide.

7. The method for cleaning the polished sapphire glass according to claim 4, wherein the pure water cleaning in the step B is to rinse the sapphire glass after the second cleaning treatment to be neutral by using pure water, and the rinsing treatment time is 100-300 seconds.

8. The method for cleaning the polished sapphire glass according to claim 4, wherein the solvent in step A and the solvent in step B are independently selected from water or ethanol.

Technical Field

The invention relates to a method for cleaning polished sapphire glass, and belongs to the technical field of sapphire glass cleaning.

Background

In recent years, the development of electronic products and the requirement of people on product quality are improved, a window screen of the electronic product is developed from a common glass material to a sapphire glass material, the sapphire glass has the characteristics of high hardness and the like, a brush and the like adopted in the traditional polishing are difficult to polish, a polishing solution is usually combined to be used for processing in the processing process, the polishing solution contains grinding powder, and the sapphire glass is integrally subjected to processing technologies such as grinding, rough polishing, fine polishing and the like. Currently, polishing liquid for polishing or fine polishing of sapphire glass is mainly used for polishing by silica sol, silica or silicon dioxide in the silica sol and the surface of sapphire form aluminum silicate, and polishing is realized under the action of mechanical force, so that solid residues and the like in the polishing liquid can be remained on the surface of the polished sapphire glass, and the sapphire glass must be cleaned after polishing. However, substances such as silicon oxide or silicon dioxide are adhered to the surface of the polished sapphire glass, and the polished sapphire glass is not easy to clean, so that the cleaning efficiency of the polished sapphire glass in the industry is low, manual wiping and cleaning are required to be combined in the cleaning process, and the surface of the sapphire glass is not clean. In order to solve the problems of manual wiping cleaning and difficult cleaning, isopropanol cleaning, ethanol cleaning and deionized water cleaning are adopted in the prior document; ammonia water cleaning and water ion water cleaning; phosphoric acid cleaning and deionized water cleaning; hydrofluoric acid washs and water ion water washs, and its cleaning process is longer, and whole cleaning time is long for abluent inefficiency, and the hydrofluoric acid that adopts in the cleaning process is strong corrosive acid composition, is unfavorable for the operation, and also easily causes sapphire glass surface damage.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a method for cleaning polished sapphire glass, and solves the problems of how to improve the cleaning efficiency and enable the sapphire glass to have the characteristic of good surface cleanliness.

The invention aims to realize the purpose through the following technical scheme, and the method for cleaning the polished sapphire glass comprises the following steps:

A. putting the polished sapphire glass into an aqueous solution of an acidic cleaning agent, and performing cleaning treatment I under the condition of controlling the temperature to be 70-80 ℃; the acidic cleaning agent comprises the following components in percentage by mass:

fatty alcohol polyoxyethylene ether: 8% -14%; 2-hydroxypropionic acid: 10% -15%; tartaric acid: 8% -13%; sodium sulfate: 6 to 10 percent; the balance of solvent;

B. b, putting the sapphire glass treated in the step A into an aqueous solution of an alkaline cleaning agent, controlling the temperature to be 70-80 ℃, performing cleaning treatment II, and cleaning with pure water after the cleaning treatment to obtain the cleaned sapphire glass;

the alkaline cleaning agent comprises the following components in percentage by mass:

glycerol polyoxyethylene polyoxypropylene ether: 2% -5%; sodium carbonate: 10% -16%; alkali metal hydroxide: 11% -16%; propylene glycol: 10% -15%; potassium monoalkyl ether phosphate ester: 2% -5%; sodium glutamate: 2% -5%; the balance being solvent.

The acidic cleaning agent is adopted, the component composition and the content of the acidic cleaning agent are improved, so that the acidic cleaning agent contains the combined action of 2-hydroxypropionic acid, tartaric acid and fatty alcohol-polyoxyethylene ether, the temperature during treatment is controlled at 70-80 ℃, the treatment is performed at relatively high temperature, stubborn residual substances such as silicon dioxide and silicon oxide on the surface of the sapphire glass can be softened, the fatty alcohol-polyoxyethylene ether has the surface activation effect to promote the bonding force of residual polishing powder solid substances such as silicon dioxide and silicon oxide on the surface of the sapphire glass to be reduced, the alkaline cleaning agent is combined with a subsequently adopted alkaline cleaning agent for cleaning, the glycerol polyoxyethylene polyoxypropylene ether, the propylene glycol and the monoalkyl ether phosphate potassium salt are added into the alkaline cleaning agent to remove the shedding of the polishing powder solid residues such as silicon dioxide and silicon oxide on the surface of the sapphire glass, the alkaline cleaning agent on the surface is cleaned to be neutral by pure water cleaning, and the advantage of high-efficiency cleaning is realized without manual wiping treatment; and the water drop angle of the surface of the cleaned sapphire glass is less than or equal to 15 degrees, and the water drop angle is very low, which shows that residual dirt and inorganic matters on the surface can be effectively removed, and the cleanliness is high. The polishing of the sapphire glass is carried out by using a conventional silicon dioxide polishing solution or a silicon melt polishing solution, and for example, the sapphire glass polished by using a polishing solution of the prior patent document with the publication number of CN101230239B can be used. Meanwhile, the acidic cleaning agent and the alkaline cleaning agent adopted by the invention do not adopt strong corrosive acid such as hydrofluoric acid and the like, thereby being more beneficial to realizing production operation and ensuring the surface performance of the sapphire glass.

In the method for cleaning the polished sapphire glass, the mass percentage of the acidic cleaning agent in the aqueous solution of the acidic cleaning agent in the step a is preferably 10% to 15%. The improved acidic cleaning agent can realize the purpose of high-efficiency cleaning at relatively low concentration, greatly improves the cleaning efficiency, reduces the generation cost and is more favorable for actual production.

In the above method for cleaning the polished sapphire glass, preferably, in the step a, an ultrasonic cleaning treatment is used as the first cleaning treatment, and the time for the ultrasonic cleaning treatment is 200 seconds to 300 seconds. The cleaning purpose can be achieved in a short time by combining ultrasonic cleaning with the adoption of the acidic cleaning agent, so that the softening of residues on the surface of the sapphire glass is effectively promoted, and the adhesive force between the residues and the surface of the glass is reduced. Compared with the conventional cleaning time which needs 10-15 minutes, the cleaning efficiency is obviously improved, multiple times of cleaning and manual wiping processes are not needed after cleaning, and the comprehensive cleaning efficiency is higher.

In the cleaning method after polishing of the sapphire glass, the mass percentage of the alkaline cleaner in the aqueous solution of the alkaline cleaner in the step B is preferably 8.0% to 12%. The advantage of removing the residues on the surface of the sapphire glass can be realized by adopting a small amount of alkaline cleaning agent for cleaning, the cleaning cost is reduced, and the effect of high cleaning efficiency is achieved.

In the method for cleaning the polished sapphire glass, preferably, in the step B, ultrasonic cleaning is used for the second cleaning treatment, and the time for the ultrasonic cleaning is 200 to 300 seconds. The aim of cleaning can be achieved within a short time, the surface quality of the integral sapphire glass can be ensured after final cleaning, and the effect of high cleanliness with low surface water drop angle is achieved. As a further preference, the alkali metal hydroxide is selected from sodium hydroxide and/or potassium hydroxide. The pH value of the system of the cleaning agent can be adjusted, so that the cleaning efficiency is promoted.

In the method for cleaning the polished sapphire glass, preferably, the cleaning with pure water in the step B is to rinse the sapphire glass after the second cleaning treatment with pure water until the sapphire glass is neutral, and the time for the rinsing treatment is 100 to 300 seconds. The purpose of pure water rinsing is to remove alkaline cleaning liquid on the surface in the cleaning process of the previous procedure, so that residual liquid is effectively removed, and a small amount of solid residues on the surface of the sapphire glass are further removed, so that the final cleaning effect is achieved, the whole rinsing time is short, and the whole cleaning process still has the advantages of high efficiency and fast beam forming.

In the above method for cleaning the polished sapphire glass, the solvents in step a and step B are preferably independently selected from water or ethanol. The functions of all components can be fully exerted, and the cleaning efficiency is improved. It is preferable that the solvent used herein is water. Can fully dissolve and mix all components in the system, is favorable for environmental protection and reduces the pollution of organic solvents.

In summary, compared with the prior art, the invention has the following advantages:

1. the improved acidic cleaning agent is combined with the alkaline cleaning agent for continuous cleaning, so that the advantage of high-efficiency cleaning can be realized, and the cleaning efficiency is obviously improved; and the water drop angle of the surface of the sapphire glass after cleaning is less than or equal to 15 degrees, so that the water drop angle is very low, and the effect of high cleanliness of the surface of the sapphire glass is realized.

2. The acidic cleaning agent and the alkaline cleaning agent adopted by the invention do not adopt acids with strong corrosivity such as hydrofluoric acid and the like, are more favorable for realizing production operation and ensuring the surface performance of the sapphire glass, avoid the influence of the strong corrosivity on the surface performance of the sapphire and have no phenomenon of blue fogging.

Detailed Description

The technical solution of the present invention is further specifically described below by way of specific examples, but the present invention is not limited to these examples.

Example 1

Placing the sapphire glass after fine polishing (polishing by adopting a silicon dioxide polishing solution or a polishing solution of silica sol) into an aqueous solution cleaning tank filled with an acid cleaning agent with the mass percentage of 10%, and performing ultrasonic cleaning treatment for 300s at the temperature of 75-80 ℃; the acidic cleaning agent comprises the following components in percentage by mass:

fatty alcohol polyoxyethylene ether: 14 percent; 2-hydroxypropionic acid: 15 percent; tartaric acid: 8 percent; sodium sulfate: 10 percent; the balance of water;

rinsing the sapphire glass for 100 seconds by pure water to remove residual acid cleaning solution on the surface of the sapphire glass, then putting the sapphire glass after being treated into another cleaning tank filled with 10 mass percent of aqueous solution of alkaline cleaning agent, and performing ultrasonic cleaning treatment for 300 seconds under the condition of controlling the cleaning temperature to be 70-75 ℃; the alkaline cleaning agent comprises the following components in percentage by mass:

glycerol polyoxyethylene polyoxypropylene ether: 5 percent; sodium carbonate: 10 percent; sodium hydroxide: 16 percent; propylene glycol: 10 percent; potassium monoalkyl ether phosphate ester: 5 percent; sodium glutamate: 4 percent; the balance of water.

And after the ultrasonic cleaning treatment is finished, rinsing the surface of the sapphire glass for 200s by using pure water, rinsing the surface of the sapphire glass to be neutral by using the pure water, and drying the sapphire glass to obtain the cleaned sapphire glass.

The surface performance test of the obtained cleaned sapphire glass shows that the water drop angle of the surface of the sapphire glass is less than or equal to 15 degrees, the Dyne of the surface of the sapphire glass can reach 42(Dyne/cm), and the phenomenon of blue fogging does not occur.

Example 2

Placing the sapphire glass after fine polishing (polishing by adopting a silicon dioxide polishing solution or a polishing solution of silica sol) into an aqueous solution cleaning tank filled with an acid cleaning agent with the mass percentage of 15%, and performing ultrasonic cleaning treatment for 200s at the temperature of 70-75 ℃; the acidic cleaning agent comprises the following components in percentage by mass:

fatty alcohol polyoxyethylene ether: 10 percent; 2-hydroxypropionic acid: 14 percent; tartaric acid: 10 percent; sodium sulfate: 8 percent; the balance of water;

rinsing the sapphire glass for 150 seconds by pure water to remove residual acid cleaning solution on the surface of the sapphire glass, then putting the sapphire glass after being treated into another cleaning tank filled with 12 mass percent of aqueous solution of alkaline cleaning agent, and performing ultrasonic cleaning treatment for 280 seconds under the condition of controlling the cleaning temperature to be 70-75 ℃; the alkaline cleaning agent comprises the following components in percentage by mass:

glycerol polyoxyethylene polyoxypropylene ether: 3 percent; sodium carbonate: 14 percent; potassium hydroxide: 13 percent; propylene glycol: 12 percent; potassium monoalkyl ether phosphate ester: 2.0 percent; sodium glutamate: 3.0 percent; the balance of water.

And after the ultrasonic cleaning treatment is finished, rinsing the surface of the sapphire glass for 150 seconds by using pure water, rinsing the surface of the sapphire glass to be neutral by using the pure water, and drying the sapphire glass to obtain the cleaned sapphire glass.

The surface performance test of the obtained cleaned sapphire glass shows that the water drop angle of the surface of the sapphire glass is less than or equal to 15 degrees, the Dyne of the surface of the sapphire glass can reach 40(Dyne/cm), and the phenomenon of blue fogging does not occur.

Example 3

Placing the sapphire glass subjected to fine polishing (polishing by adopting a silicon dioxide polishing solution or a silica sol polishing solution) into an aqueous solution cleaning tank filled with an acid cleaning agent with the mass percentage of 15%, and performing ultrasonic cleaning treatment for 250s at the controlled temperature of 78-80 ℃; the acidic cleaning agent comprises the following components in percentage by mass:

fatty alcohol polyoxyethylene ether: 8 percent; 2-hydroxypropionic acid: 10 percent; tartaric acid: 8 percent; sodium sulfate: 10 percent; the balance of water;

rinsing the sapphire glass for 100 seconds by using pure water to remove residual acid cleaning solution on the surface of the sapphire glass, then putting the sapphire glass after being treated into another cleaning tank filled with 8.0 mass percent of aqueous solution of alkaline cleaning agent, and performing ultrasonic cleaning treatment for 200 seconds under the condition of controlling the cleaning temperature to be 75-80 ℃; the alkaline cleaning agent comprises the following components in percentage by mass:

glycerol polyoxyethylene polyoxypropylene ether: 2 percent; sodium carbonate: 10 percent; potassium hydroxide: 11 percent; propylene glycol: 15 percent; potassium monoalkyl ether phosphate ester: 5.0 percent; sodium glutamate: 5.0 percent; the balance of water.

And after the ultrasonic cleaning treatment is finished, rinsing the surface of the sapphire glass for 120s by using pure water, rinsing the surface of the sapphire glass to be neutral by using the pure water, and drying the sapphire glass to obtain the cleaned sapphire glass.

The surface performance test of the obtained cleaned sapphire glass shows that the water drop angle of the surface of the sapphire glass is less than or equal to 15 degrees, the Dyne of the surface of the sapphire glass reaches 39(Dyne/cm), and the phenomenon of blue fogging does not occur.

Example 4

Placing the sapphire glass subjected to fine polishing (polishing by adopting a silicon dioxide polishing solution or a polishing solution of silica sol) into an aqueous solution cleaning tank filled with 10% of an acid cleaning agent in percentage by mass, and performing ultrasonic cleaning treatment for 200s under the condition of controlling the temperature to be 75-78 ℃; the acidic cleaning agent comprises the following components in percentage by mass:

fatty alcohol polyoxyethylene ether: 14 percent; 2-hydroxypropionic acid: 12 percent; tartaric acid: 13 percent; sodium sulfate: 8 percent; the balance of water;

rinsing the sapphire glass for 120 seconds by pure water to remove residual acid cleaning solution on the surface of the sapphire glass, then putting the sapphire glass after being treated into another cleaning tank filled with 11 mass percent of aqueous solution of alkaline cleaning agent, and performing ultrasonic cleaning treatment for 240 seconds under the condition of controlling the cleaning temperature to be 75-78 ℃; the alkaline cleaning agent comprises the following components in percentage by mass:

glycerol polyoxyethylene polyoxypropylene ether: 5 percent; sodium carbonate: 12 percent; sodium hydroxide: 13 percent; propylene glycol: 12 percent; potassium monoalkyl ether phosphate ester: 5.0 percent; sodium glutamate: 4.0 percent; the balance of water.

And after the ultrasonic cleaning treatment is finished, rinsing the surface of the sapphire glass for 140s by using pure water, rinsing the surface of the sapphire glass to be neutral by using the pure water, and drying the sapphire glass to obtain the cleaned sapphire glass.

The surface performance test of the obtained cleaned sapphire glass shows that the water drop angle of the surface of the sapphire glass is less than or equal to 15 degrees, the Dyne of the surface of the sapphire glass reaches 41(Dyne/cm), and the phenomenon of blue fogging does not occur.

Example 5

The method for cleaning the polished sapphire glass in the embodiment is basically the same as that in embodiment 4, except that the solvent in the acidic cleaning agent is ethanol, and the corresponding cleaning time is adjusted to ultrasonic cleaning treatment for 400 s. A certain cleaning effect can be achieved as well.

The surface performance test of the obtained cleaned sapphire glass shows that the water drop angle of the surface of the sapphire glass is less than or equal to 15 degrees, the Dyne of the surface of the sapphire glass can reach 41(Dyne/cm), the phenomenon of bluing and fogging does not occur, the cleaning time is improved, and the cleaning efficiency is still good.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.