CN-122011471-A - Preparation method of antibacterial multifunctional optical film

CN122011471ACN 122011471 ACN122011471 ACN 122011471ACN-122011471-A

Abstract

The scheme relates to a preparation method of an antibacterial multifunctional optical film, which comprises the steps of mixing, by weight, 100 parts of PET (polyethylene terephthalate) slices, 7-15 parts of antioxidant modified auxiliary particles and 1-4 parts of compatilizer, then performing melt extrusion and casting, performing biaxial stretching on the casting to obtain a base film, and coating an antibacterial enhanced multifunctional coating liquid on the base film, and performing Ultraviolet (UV) curing to form the antibacterial enhanced multifunctional coating to obtain the antibacterial multifunctional optical film. The antioxidant modified auxiliary particles in the base film load the antioxidant through a pore structure rich in mesoporous silica, so that the slow release of the antioxidant can be realized, and the long-acting antioxidant performance can be provided for the base film; the antibacterial enhancement multifunctional coating is formed by coating the antibacterial enhancement multifunctional coating liquid on the base film, so that the optical film can be endowed with excellent antibacterial performance and self-repairing performance, and a good anti-dazzle effect can be obtained, thereby realizing the multifunctional enhancement modification of the optical film.

Inventors

WANG YONGJUN
HUANG HAN
WANG RUNXIAO
ZHUANG ZHI
WANG FENG

Assignees

扬州博恒新能源材料科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260413

Claims (10)

1. The preparation method of the antibacterial multifunctional optical film is characterized by comprising the following steps of: step one, mixing 100 parts of PET slices, 7-15 parts of antioxidant modified auxiliary particles and 1-4 parts of compatilizer according to parts by weight, and then carrying out melt extrusion and sheet casting; secondly, biaxially stretching the cast sheet to obtain a base film; coating an antibacterial enhanced multifunctional coating liquid on the base film, and performing Ultraviolet (UV) curing to form an antibacterial enhanced multifunctional coating to obtain the antibacterial multifunctional optical film; The antioxidant modified auxiliary particle is prepared by the following steps: s1-1, loading an antioxidant on mesoporous silica to prepare the antioxidant functionalized silica: s1-2, modifying the antioxidant modified silicon dioxide by adopting a silane coupling agent to obtain modified silicon dioxide; S1-3, mixing the modified silicon dioxide and PET slices according to a mass ratio of 1:3-8, uniformly stirring, then carrying out melt extrusion, and granulating to obtain antioxidant modified auxiliary granules; the antibacterial enhanced multifunctional coating liquid comprises the following raw material components in parts by weight: 60-90 parts of polyurethane acrylic ester, 2-8 parts of trifluoroethyl methacrylate, 4-15 parts of glycidyl methacrylate, 3-12 parts of ‌ diacetone acrylamide, 7-20 parts of lipoic acid polyethylene glycol methacrylate, 4-10 parts of ‌ zinc acrylate, 6-14 parts of antibacterial enhanced multi-effect silica particles, 30-60 parts of organic solvent, 1-5 parts of photoinitiator, 1-4 parts of emulsifier and 0.5-5 parts of auxiliary agent; The antibacterial enhanced multi-effect silica particles are prepared by the following steps: s2-1, depositing titanium doped carbon points on mesoporous silica to obtain load modified mesoporous silica; S2-2, loading nano silver on the loaded modified mesoporous silica to obtain antibacterial modified mesoporous silica; S2-3, modifying the antibacterial modified mesoporous silica by adopting a silane coupling agent to obtain antibacterial enhanced multi-effect silica particles.
2. The method for preparing an antibacterial multifunctional optical film according to claim 1, comprising the steps of: Step one, uniformly mixing 100 parts of PET slices, 7-15 parts of antioxidant modified auxiliary particles and 1-4 parts of compatilizer according to parts by weight, and then putting into a double-screw extruder for melt extrusion and sheet casting at 240-265 ℃; secondly, longitudinally stretching the cast sheet at the temperature of 90-100 ℃ with the stretching multiplying power of 2.5-3.5, transversely stretching the cast sheet at the temperature of 105-115 ℃ with the stretching multiplying power of 3-5, and cooling to obtain a base film; And thirdly, coating an antibacterial enhanced multifunctional coating liquid on the base film, controlling the wet coating amount to be 6-15g/m 2 , performing UV curing under the protection of nitrogen to form an antibacterial enhanced multifunctional coating, and controlling the UV curing energy to be 500-700mJ/cm 2 to obtain the antibacterial multifunctional optical film.
3. The method for preparing an antibacterial multifunctional optical film according to claim 1, wherein the antioxidant modified auxiliary particles are prepared by the following steps: S1-1, adding mesoporous silica into an antioxidant solution, stirring, oscillating under heating, filtering, washing and drying to obtain antioxidant functionalized silica; S1-2, adding antioxidant functionalized silica into a mixed solution composed of deionized water and ethanol, stirring, adding a silane coupling agent, heating and stirring, filtering, washing and drying to obtain modified silica; s1-3, mixing the modified silicon dioxide and PET slices according to the mass ratio of 1:3-8, uniformly stirring, then carrying out melt extrusion at 240-260 ℃, and granulating to obtain the antioxidant modified auxiliary granules.
4. The method for producing an antibacterial multifunctional optical film according to claim 3, wherein the antioxidant is at least one selected from the group consisting of antioxidants 1010, 1076, 168 and B215, and the silane coupling agent is KH-570.
5. The method for preparing an antibacterial multifunctional optical film according to claim 4, wherein the antioxidant modified auxiliary particles are prepared by the following steps: s1-1, adding 0.5-2g mesoporous silica into 50-160mL of acetone solution of antioxidant 1010 with mass concentration of 3-10%, stirring for 0.5-2h, oscillating for 6-24h at 50-65 ℃, filtering, washing with ethanol, and vacuum drying at 70-90 ℃ overnight to obtain antioxidant functionalized silica; s1-2, adding 1-4g of antioxidant functionalized silica into 80-300mL of mixed solution consisting of deionized water and ethanol according to the volume ratio of 1:1, stirring for 0.5-2h, adding 0.2-0.8g of silane coupling agent KH-570,60-70 ℃ and stirring for 1.5-6h, filtering, washing a solid product with ethanol and deionized water in sequence, and drying at 70-90 ℃ overnight to obtain modified silica; s1-3, mixing the modified silicon dioxide and PET slices according to the mass ratio of 1:4, stirring uniformly, adding into a double-screw extruder, carrying out melt extrusion at 240-260 ℃, granulating, and drying to obtain the antioxidant modified auxiliary granules.
6. The method for preparing an antibacterial multifunctional optical film according to claim 1, wherein the antibacterial enhanced multi-effect silica particles are prepared by the following steps: S2-1, dispersing mesoporous silica and titanium chloride in ethanol, then adding salicylic acid, 2-mercaptoisobutyric acid and p-phenylenediamine, stirring, transferring the obtained mixture into a reaction kettle, reacting for 8-16 hours at 155-185 ℃, carrying out suction filtration, washing and drying to obtain the loaded modified mesoporous silica; S2-2, adding the loaded modified mesoporous silica into an ethanol solution of silver nitrate, performing ultrasonic dispersion, adding glucose, dropwise adding ammonia water to adjust pH to be alkaline in a dark place, heating and stirring for reaction, and performing suction filtration, washing and drying after the reaction is finished to obtain the antibacterial modified mesoporous silica; S2-3, adding the antibacterial modified mesoporous silica and deionized water into ethanol, performing ultrasonic dispersion, then adding a silane coupling agent KH-570, performing heating and stirring reaction, performing suction filtration after the reaction is finished, washing, and drying to obtain the antibacterial enhanced multi-effect silica particles.
7. The method for preparing an antibacterial multifunctional optical film according to claim 6, wherein the antibacterial reinforced multi-effect silica particles are prepared by the following steps: S2-1, adding 0.75-3g of mesoporous silica and 0.25-1.1g of titanium chloride into 100-400mL of ethanol, performing ultrasonic dispersion for 30-120min, then adding 0.41-1.76g of salicylic acid, 0.3-1.2g of 2-mercaptoisobutyric acid and 0.11-0.44g of p-phenylenediamine, stirring for 15-60min, transferring the obtained mixture into a polytetrafluoroethylene lining reaction kettle, reacting for 8-16h at 155-185 ℃, performing suction filtration, washing a solid product with ethanol, and performing vacuum drying for 12-48h at 80-100 ℃ to obtain the load modified mesoporous silica; s2-2, adding 0.5-2g of load modified mesoporous silica into 30-120mL of ethanol solution of silver nitrate with concentration of 0.005-0.05mol/L, performing ultrasonic dispersion for 0.5-2h, adding 0.1-0.36g of glucose, dropwise adding 5-15wt% of ammonia water in a dark place to adjust the pH value to 9-10, stirring and reacting for 12-48h at 40-70 ℃, performing suction filtration after the reaction is finished, washing a solid product with deionized water, and performing vacuum drying for 12-48h at 80-100 ℃ to obtain the antibacterial modified mesoporous silica; S2-3, adding 1-4g of antibacterial modified mesoporous silica and 15-60mL of deionized water into 60-240mL of ethanol, performing ultrasonic dispersion for 0.5-2h, then adding 0.25-1g of silane coupling agent KH-570,45-75 ℃ and stirring for 2.5-8h, performing suction filtration, washing a solid product with ethanol, and performing vacuum drying for 12-48h at 80-100 ℃ to obtain the antibacterial enhanced multi-effect silica particles.
8. The method for preparing an antibacterial multifunctional optical film according to claim 1, wherein the antibacterial reinforced multifunctional coating liquid is prepared by the following steps: S3-1, dividing an organic solvent into a first part of solvent and a second part of solvent, adding polyurethane acrylic ester, trifluoro ethyl methacrylate, glycidyl methacrylate, ‌ diacetone acrylamide, lipoic acid polyethylene glycol methacrylate, ‌ zinc acrylate and an emulsifier into the first part of solvent, and stirring for 0.5-2h to obtain a mixture 1; S3-2, adding the antibacterial enhancement multi-effect silica particles into the second part of solvent, performing ultrasonic dispersion for 30-90min, adding the obtained mixture 2 into the mixture 1 under stirring, adding the photoinitiator and the auxiliary agent, and stirring for 5-30min to obtain the antibacterial enhancement multi-function coating liquid.
9. The method for producing an antibacterial multifunctional optical film according to any one of claims 1 to 8, wherein the mesoporous silica has a particle diameter of 50 to 500nm.
10. The method for preparing the antibacterial multifunctional optical film according to any one of claims 1 to 8, wherein the organic solvent is at least one of acetone and butanone, the ‌ photoinitiator is at least one of ‌ photoinitiator TPO, photoinitiated TPO-L ‌, photoinitiator 907, photoinitiator 1173, photoinitiator 184 and ‌ photoinitiator OXE-01, the emulsifying agent is at least one of emulsifying agent OP-13, emulsifying agent OP-10, sodium dodecyl benzene sulfonate and polyoxyethylene stearate, and the auxiliary agent comprises one or more of flatting agent, defoaming agent and dispersing agent.

Description

Preparation method of antibacterial multifunctional optical film Technical Field The invention relates to the field of film materials, in particular to a preparation method of an antibacterial multifunctional optical film. Background Devices such as display screens, touch screens, etc. often require the attachment of optical films for protection to reduce screen damage. PET films have been widely used for producing optical films because of their high light transmittance, chemical resistance, and the like. As a touch screen, it is an important function to have antibacterial performance for inhibiting bacterial transmission and protecting the health of a user. The addition of antimicrobial agents is a common scheme for imparting bacteriostatic properties to optical films, and common antimicrobial agents include organic antimicrobial agents (quaternary ammonium salts, quaternary phosphonium salts, and the like) and inorganic antimicrobial agents (e.g., nano silver, silver ions, zinc ions, and the like). For example, patent CN111909412B discloses an optical film with antibacterial function and a preparation method thereof, which adopts the addition of nano silver ions to improve the antibacterial performance of the optical film. Such a scheme has the disadvantage that the antibacterial activity of the antibacterial agent is remarkably reduced when the concentration thereof is reduced due to consumption or loss with the lapse of the use time, resulting in insufficient antibacterial aging. On the other hand, in the course of transportation or use, scratches or other damages are easily generated on the surface of the optical film due to scratches or the like, which may affect the use effect or shorten the service life thereof. Such problems can be better addressed by imparting a certain self-repairing ability to the optical film, for example, an optical film having a self-repairing function and a method for producing the same, as disclosed in patent CN 120842654B. Further, when external strong light is irradiated to the display surface, the formed reflection glare may decrease the visibility of the image, resulting in a decrease in contrast and visual fatigue, so that the demand for anti-glare performance of the optical film is also raised. In summary, the multifunctional optical film with antibacterial performance and self-repairing and anti-dazzle properties can remarkably improve the use effect of the optical film, so that market demands can be better met. But the prior art lacks a reliable solution. Disclosure of Invention The invention aims to solve the technical problem of providing a preparation method of an antibacterial multifunctional optical film aiming at the defects in the prior art. In order to solve the technical problems, the invention adopts the technical scheme that the preparation method of the antibacterial multifunctional optical film comprises the following steps: step one, mixing 100 parts of PET slices, 7-15 parts of antioxidant modified auxiliary particles and 1-4 parts of compatilizer according to parts by weight, and then carrying out melt extrusion and sheet casting; secondly, biaxially stretching the cast sheet to obtain a base film; coating an antibacterial enhanced multifunctional coating liquid on the base film, and performing Ultraviolet (UV) curing to form an antibacterial enhanced multifunctional coating to obtain the antibacterial multifunctional optical film; The antioxidant modified auxiliary particle is prepared by the following steps: s1-1, loading an antioxidant on mesoporous silica to prepare the antioxidant functionalized silica: s1-2, modifying the antioxidant modified silicon dioxide by adopting a silane coupling agent to obtain modified silicon dioxide; S1-3, mixing the modified silicon dioxide and PET slices according to a mass ratio of 1:3-8, uniformly stirring, then carrying out melt extrusion, and granulating to obtain antioxidant modified auxiliary granules; the antibacterial enhanced multifunctional coating liquid comprises the following raw material components in parts by weight: 60-90 parts of polyurethane acrylic ester, 2-8 parts of trifluoroethyl methacrylate, 4-15 parts of glycidyl methacrylate, 3-12 parts of ‌ diacetone acrylamide, 7-20 parts of lipoic acid polyethylene glycol methacrylate, 4-10 parts of ‌ zinc acrylate, 6-14 parts of antibacterial enhanced multi-effect silica particles, 30-60 parts of organic solvent, 1-5 parts of photoinitiator, 1-4 parts of emulsifier and 0.5-5 parts of auxiliary agent; The antibacterial enhanced multi-effect silica particles are prepared by the following steps: s2-1, depositing titanium doped carbon points on mesoporous silica to obtain load modified mesoporous silica; S2-2, loading nano silver on the loaded modified mesoporous silica to obtain antibacterial modified mesoporous silica; S2-3, modifying the antibacterial modified mesoporous silica by adopting a silane coupling agent to obtain antibacterial enhanced multi-