Anti-ultraviolet dispersion liquid based on glass grinding powder waste and application of anti-ultraviolet dispersion liquid

Abstract

The invention discloses an anti-ultraviolet dispersion liquid based on glass grinding powder waste and application of the anti-ultraviolet dispersion liquid. A preparation method comprises the following steps: treating glass grinding wastewater: precipitating or concentrating the glass grinding wastewater; grinding the solid or concentrated liquid prepared in the previous step, and adding a dispersing agent during grinding; adding a preservative; and adding sodium chloride, sodium sulfate, sodium acetate and acetic acid to adjust the pH value. After high-speed violent mechanical movement of the grinding material and the glass grinding powder waste, the particle size distribution and the crystal structure of solid particles in the waste water have nano characteristics, the absorption capacity on ultraviolet light is very high, and the waste water has the characteristics of bacteriostasis, radiation resistance and the like, and can be used for products such as sunscreen cosmetics, bacteriostasis and ultraviolet prevention textile coatings, paints, automobile glass and films. The wastewater is purified and dispersed, so that the problem of sewage treatment in the field of glass polishing is solved, cyclic utilization of resources is realized, and the method is of great significance to green upgrading of the industry.

Description

Technical Field

[0001] The present invention relates to an anti-ultraviolet dispersion liquid based on glass grinding powder waste and its application, belonging to the technical field of preparation and application of anti-ultraviolet dispersion liquid. Background Art

[0002] The global display panel industry is mainly concentrated in Asia. In particular, the output of display panels in China has increased from 43.55 million square meters in 2016 to 163.35 million square meters in 2023, accounting for 73% of the global total output. Its main material is various types of glass. Especially new glass materials represented by microcrystalline glass, such as Kunlun Glass used in Huawei mobile phones, have characteristics such as high mechanical strength, high hardness, and good thermal expansion performance, and are widely used in high-end fields such as electronic appliances, automobile manufacturing, medical devices, and aerospace. Its output value has increased from 17 billion yuan in 2018 to 27 billion yuan in 2024, with an annual compound growth rate of about 9.8%. At present, in the preparation process of industrial products made of microcrystalline glass, such as precision electronic devices like optical lenses and mobile phone screens, the grinding and polishing processes have become an important link affecting product quality.

[0003] In China, about 25 million tons of glass grinding and polishing wastewater is generated. The composition of grinding and polishing wastewater is complex, mainly including rare earth abrasives, glass powder, pH regulators, surfactants, and a small amount of other rare earth oxides, such as La2O3, Pr6O 11 、Nd2O3, etc. Its particles are in a stable suspended state, with difficult separation and high treatment costs. Currently, common methods such as chemical flocculation, microbial method, membrane separation method, advanced oxidation method, combined with waste incineration are used for treatment. Although the wastewater can be treated, it is costly. More importantly, the rare earth resources in the sediment are not effectively utilized, and at the same time, it increases the difficulty of subsequent treatment and environmental risks. Therefore, for the glass deep-processing industry that consumes a large amount of rare earth resources, how to integrate the concepts of high technology, high efficiency, and high quality into the process of waste recycling and realize waste resource utilization is a new challenge faced by enterprises in transformation and upgrading. Summary of the Invention

[0004] The purpose of the present invention is to provide an anti-ultraviolet dispersion liquid based on glass grinding powder waste. The particle size distribution and crystal structure of the solid particles after grinding treatment will have nano characteristics, and it has a strong ability to absorb ultraviolet light and has characteristics such as antibacterial and anti-radiation.

[0005] To solve the above technical problems, the purpose of the present invention is achieved as follows:

[0006] An anti-ultraviolet dispersion liquid based on glass grinding powder waste according to the present invention includes the following steps:

[0007] S1. Treatment of glass grinding wastewater: precipitate or concentrate the glass grinding wastewater;

[0008] S2. Grinding: grind the solid or concentrated liquid prepared in the previous step, and add a dispersant during grinding;

[0009] S3. Add a preservative;

[0010] S4. Add sodium chloride, sodium sulfate, sodium acetate, and acetic acid to adjust the pH value.

[0011] Based on the above solution and as a preferred solution of the above solution: the glass grinding wastewater includes rare earth abrasives, glass powder, pH regulator, surfactant, and a small amount of other rare earth oxides; the other rare earth oxides are La2O3, Pr6O 11 , Nd2O3.

[0012] Based on the above solution and as a preferred solution of the above solution: in step S1, precipitating the glass grinding wastewater means adding polyaluminum chloride to the wastewater for sedimentation to obtain a solid precipitate containing a large amount of nanoparticles; filtering and drying the precipitate to obtain a dry solid. Use a high-speed shearing device or other means for grinding.

[0013] Based on the above solution and as a preferred solution of the above solution: in step S1, concentrating the glass grinding wastewater means directly performing high-temperature evaporation and vacuum rotary evaporation concentration on the glass grinding wastewater at a temperature of 100 °C for 1 - 10 h, with a concentration ratio of 2:1 - 100:1, to obtain a concentrated liquid with a solid content of 0.01% - 50%; use a cell disruptor for ultrasonic dispersion and a ball mill for ball milling.

[0014] Based on the above solution and as a preferred solution of the above solution: in step S2, the dispersant is sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, Tween series, Span series, polyvinylpyrrolidone, or polyvinyl alcohol; the dosage of the dispersant is 0.1 wt% - 50 wt%.

[0015] Based on the above solution and as a preferred solution of the above solution: in step S3, the preservative is Kathon, benzisothiazolinone, quaternary ammonium salts, or iodopropargyl butylcarbamate, and the dosage of the preservative is 0.001 wt% - 5 wt%.

[0016] Based on the above solution and as a preferred solution of the above solution: the dosage of sodium chloride is 0.001 wt% - 5 wt%, the dosage of sodium sulfate is 0.001 wt% - 5 wt%, the dosage of sodium acetate is 0.001 wt% - 5 wt%, and the dosage of acetic acid is 0.001 wt% - 5 wt%.

[0017] The application of the ultraviolet-resistant dispersion liquid involved in the present invention is to dilute the ultraviolet-resistant dispersion liquid, control the solid content of the solution to be 0.001%-5%, and perform padding or impregnation on textiles, papers, and leathers, followed by drying.

[0018] Another application of the ultraviolet-resistant dispersion liquid involved in the present invention is to mix the ultraviolet-resistant dispersion liquid with adhesives, dispersants, thickeners, and water, and stir using a high-speed shear stirrer to prepare a uniform viscous slurry;

[0019] Apply it on the surfaces of textiles, walls, plastics, metals, and woods by means of roll coating, knife coating, brush coating, screen printing, etc.;

[0020] The adhesive includes at least one of polyurethane, polyacrylate, rubber solution, polyvinyl chloride, and polytetrafluoroethylene.

[0021] The beneficial effects of the present invention are as follows: An ultraviolet-resistant dispersion liquid based on glass grinding powder waste and its application involved in the present invention, after the high-speed and intense mechanical movement of the abrasive and the glass grinding powder waste, the particle size distribution and crystal structure of the solid particles in the wastewater will have nano characteristics, and its ultraviolet light absorption ability is very strong, with characteristics such as antibacterial and anti-radiation, and can be used in products such as sunscreen cosmetics, antibacterial and ultraviolet-resistant textile coatings, coatings, automotive glass, and films. The present invention purifies and disperses the wastewater to prepare an anti-ultraviolet finishing agent, which not only solves the sewage treatment problem in the glass grinding field, but also realizes the recycling of resources, and is of great significance for the green upgrading of the industry. Description of the Drawings

[0022] Figure 1 It is a line graph of the UPF value after the polyester fabric is coated with the ultraviolet-resistant dispersion liquid;

[0023] Figure 2 It is a line graph of the UVA value after the polyester fabric is coated with the ultraviolet-resistant dispersion liquid;

[0024] Figure 3 It is a line graph of the UVB value after the polyester fabric is coated with the ultraviolet-resistant dispersion liquid;

[0025] Figure 4 It is a line graph of the UPF value after the nylon fabric is coated with the ultraviolet-resistant dispersion liquid;

[0026] Figure 5 It is a line graph of the UVA value after the nylon fabric is coated with the ultraviolet-resistant dispersion liquid;

[0027] Figure 6 It is a line graph of the UVB value after the nylon fabric is coated with the ultraviolet-resistant dispersion liquid. Detailed Embodiments

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] Embodiment 1

[0030] An anti-ultraviolet dispersion liquid based on waste glass grinding powder involves the following steps:

[0031] S1 Treatment of glass grinding wastewater: Precipitate the glass grinding wastewater. Precipitating the glass grinding wastewater means adding polyaluminum chloride to the wastewater for sedimentation to obtain a solid precipitate containing a large amount of nanoparticles; filter-press and dry the precipitate to obtain a dry solid.

[0032] The glass grinding wastewater includes rare earth glass abrasives, glass powder, pH regulator, surfactant, and a small amount of other rare earth oxides; the other rare earth oxides are La2O3, Pr6O 11 , Nd2O3. Specifically, the glass grinding wastewater includes 0.318% of rare earth glass abrasives, 0.129% of glass powder, 0.005% of the pH regulator, 0.001% of the surfactant, and a total of 0.002% of other rare earth oxides. The specific rare earth glass abrasive is CeO2. The glass grinding wastewater is formed after the abrasive is ground with glass. Through grinding with glass, the particle size of the abrasive becomes smaller and can reach the nanoscale, and the dispersibility of the abrasive is better.

[0033] S2 Grinding: Grind the solid prepared in the previous step, specifically by using a high-speed shearing device or other means for grinding, with the rotation speed controlled at 10 revolutions per second - 5000 revolutions per second. And add a dispersant during grinding.

[0034] Furthermore, the dispersant is sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, Tween series, Span series, polyvinylpyrrolidone, or polyvinyl alcohol; the dosage of the dispersant is 0.1 wt% - 50 wt%. In this embodiment, sodium dodecylbenzenesulfonate is selected, and the dosage is 5%.

[0035] Preservatives are added to S3, and the preservatives are Kathon, benzisothiazolinone, quaternary ammonium salts or iodopropargyl butyl amino formate, and the dosage of the preservative is 0.001 wt% - 5 wt%. In this embodiment, Kathon CG is selected, containing MIT / CMIT; the dosage is 2%.

[0036] S4. Add sodium chloride, sodium sulfate, sodium acetate, and acetic acid to adjust the pH value to obtain an anti-ultraviolet dispersion liquid, which can improve the stability of the sizing liquid. The dosage of the sodium chloride is 0.001 wt% - 5 wt%, the dosage of the sodium sulfate is 0.001 wt% - 5 wt%, the dosage of the sodium acetate is 0.001 wt% - 5 wt%, and the dosage of the acetic acid is 0.001 wt% - 5 wt%. The respective dosages are 0.3%, 0.5%, and 2%.

[0037] Example 2

[0038] An anti-ultraviolet dispersion liquid based on glass grinding powder waste involved in the present invention includes the following steps:

[0039] S1 Treatment of glass grinding wastewater: Concentrate the glass grinding wastewater. Concentrating the glass grinding wastewater means directly performing high-temperature evaporation or reduced-pressure rotary evaporation concentration on the glass grinding wastewater at a temperature of 100 °C for 1 - 10 h with a concentration ratio of 2:1 - 100:1 to obtain a concentrated liquid with a solid content of 0.01% - 50%; perform ultrasonic dispersion using a cell disruptor and ball milling using a ball mill.

[0040] The glass grinding wastewater includes rare earth abrasive for glass, glass powder, pH regulator, surfactant, and a small amount of other rare earth oxides; the other rare earth oxides are La2O3, Pr6O 11 , Nd2O3. Specifically, the content of the rare earth abrasive for glass in the glass grinding wastewater is 0.318%, the content of the glass powder is 0.129%, the content of the pH regulator is 0.005%, the content of the surfactant is 0.001%, and the total content of the other rare earth oxides is 0.002%.

[0041] S2 Grinding: Grind the solid prepared in the previous step, specifically by using a high-speed shearing device or other means for grinding, with the rotation speed controlled at 10 revolutions per second - 5000 revolutions per second. And add a dispersant during grinding.

[0042] Furthermore, the dispersant is sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, Tween series, Span series, polyvinylpyrrolidone, or polyvinyl alcohol; the dosage of the dispersant is 0.1 wt% - 50 wt%. In this example, sodium dodecylbenzenesulfonate is selected with a dosage of 10%.

[0043] S3 Add a preservative. The preservative is Kathon, benzisothiazolinone, quaternary ammonium salts, or iodopropargyl butylcarbamate, and the dosage of the preservative is 0.001 wt% - 5 wt%. In this example, Kathon CG containing MIT / CMIT is selected with a dosage of 0.5%.

[0044] S4. Add sodium chloride, sodium sulfate, sodium acetate, and acetic acid to adjust the pH value to obtain an anti-ultraviolet dispersion liquid, which can improve the stability of the sizing liquid. The dosage of the sodium chloride is 0.001 wt% - 5 wt%, the dosage of the sodium sulfate is 0.001 wt% - 5 wt%, the dosage of the sodium acetate is 0.001 wt% - 5 wt%, and the dosage of the acetic acid is 0.001 wt% - 5 wt%. The respective dosages are 0.5%, 1%, and 2%.

[0045] An application of the anti-ultraviolet dispersion liquid involved in the present invention is to dilute the anti-ultraviolet dispersion liquid, control the solid content of the solution to be 0.001% - 5%, and perform padding or impregnation on textiles, paper, and leather, and then dry. Padding is carried out by one-padding-one-rolling or two-padding-two-rolling or multi-padding-multi-rolling. During impregnation, it is carried out at 30 - 150 °C for 1 - 60 min.

[0046] Another application of the anti-ultraviolet dispersion liquid involved in the present invention is to mix the anti-ultraviolet dispersion liquid with an adhesive, a dispersant, a thickener, and water, and stir using a high-speed shear stirrer to prepare a uniform viscous slurry; apply it to the surfaces of textiles, walls, plastics, metals, and woods by means of roll coating, knife coating, brush coating, screen printing, etc.; the adhesive at least includes one of polyurethane, polyacrylate, rubber solution, polyvinyl chloride, and polytetrafluoroethylene.

[0047] Specifically, the prepared anti-ultraviolet dispersion liquid is coated on the surface of the textile by means of knife coating, and the fabric used is specifically a polyester fabric or a nylon fabric.

[0048] When performing knife coating on the polyester fabric, the gram weight of the polyester fabric used is 160 grams per square meter, and it has a plain weave. The coating amount is 5 grams per square meter. The adhesive used is polyurethane. The anti-ultraviolet dispersion liquid prepared in the used example is used. The specific data is shown in Table 1.

[0049] Table 1 Dosage of anti-ultraviolet dispersion liquid coated on polyester fabric and anti-ultraviolet test results

[0050]

[0051] It can be seen that when the amount of the anti-ultraviolet dispersion liquid used is 35 grams, the UPF reaches the peak value, and it reaches 343.678, having excellent anti-ultraviolet effect. And as Figure 1 、 Figure 2 and Figure 3 shown.

[0052] When performing knife coating on the nylon taslan fabric, the gram weight of the taslan fabric used is 160 grams per square meter, and it has a plain weave. The coating amount is 5 grams per square meter. The adhesive used is polyurethane. The anti-ultraviolet dispersion liquid prepared in the used example is used. The specific data is shown in Table 1.

[0053] Table 2 Dosage of the UV-resistant dispersion liquid coated on the polyamide fabric and UV-resistant test results

[0054]

[0055] It can be seen that when the dosage of the UV-resistant dispersion liquid is 35 g, the UPF reaches the peak value, which is 528.28, showing excellent UV-resistant effect. And as Figure 4 、 Figure 5 and Figure 6 shown.

[0056] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art shall fall within the protection scope determined by the claims.

Claims

1. An anti-ultraviolet dispersion based on glass grinding powder waste, characterized in that: The steps include: S1. Treatment of glass grinding wastewater: precipitation or concentration of glass grinding wastewater; S2, grinding: grinding the solid or concentrated liquid prepared in the previous step, and adding a dispersant during grinding; S3, adding preservatives; S4. Add sodium chloride, sodium sulfate, sodium acetate and acetic acid to adjust the pH value.

2. The anti-ultraviolet dispersion based on glass grinding powder waste according to claim 1, characterized in that: The glass grinding wastewater includes glass rare earth abrasive, glass powder, pH regulator, surfactant and a small amount of other rare earth oxides; the other rare earth oxides are La2O3, Pr6O 11 、Nd2O3.

3. The anti-ultraviolet dispersion liquid based on glass grinding powder waste according to claim 1, characterized in that: In step S1, precipitating the glass grinding wastewater means adding polyaluminium chloride into the wastewater for sedimentation to obtain a solid precipitate containing a large number of nanoparticles; and filtering and drying the precipitate to obtain a dry solid.

4. The anti-ultraviolet dispersion based on glass grinding powder waste according to claim 1, characterized in that: In step S1, concentrating the glass grinding wastewater means directly subjecting the glass grinding wastewater to high-temperature evaporation and reduced-pressure rotary evaporation concentration at a temperature of 100° C. for 1-10 hours and a concentration ratio of 2:1-100:1 to obtain a concentrated solution with a solid content of 0.01%-50%; and using a cell disruptor for ultrasonic dispersion.

5. The anti-ultraviolet dispersion based on glass grinding powder waste according to claim 1, characterized in that: In step S2, the dispersant is sodium dodecyl sulfate, sodium dodecylbenzene sulfonate, Tween series, Span series, polyvinyl pyrrolidone or polyvinyl alcohol; the amount of the dispersant is 0.1wt%-50wt%.

6. The anti-ultraviolet dispersion based on glass grinding powder waste according to claim 1, characterized in that: In step S3, the preservative is kasone, benzisothiazolinone, quaternary ammonium salt or iodopropynyl butylcarbamate, and the amount of the preservative is 0.001wt%-5wt%.

7. The anti-ultraviolet dispersion based on glass grinding powder waste according to claim 1, characterized in that: The amount of the sodium chloride is 0.001wt%-5wt%, the amount of the sodium sulfate is 0.001wt%-5wt%, the amount of the sodium acetate is 0.001wt%-5wt%, and the amount of the acetic acid is 0.001wt%-5wt%.

8. Application of the anti-ultraviolet dispersion, characterized in that: The anti-ultraviolet dispersion is diluted to control the solid content of the solution to 0.001%-5%, and the textiles, paper and leather are dipped or impregnated and then dried.

9. Application of the anti-ultraviolet dispersion, characterized in that: The anti-ultraviolet dispersion is mixed with a binder, a dispersant, a thickener and water, and stirred using a high-speed shear stirrer to prepare a uniform viscous slurry; Apply on the surface of textiles, walls, plastics, metals and wood by roller coating, scraper coating, brush coating, screen printing, etc. The adhesive comprises at least one of polyurethane, polyacrylate, rubber liquid, polyvinyl chloride and polytetrafluoroethylene.

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