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CN-121991589-A - Super-hydrophobic anti-fingerprint coating for mobile phone screen

CN121991589ACN 121991589 ACN121991589 ACN 121991589ACN-121991589-A

Abstract

The invention relates to the technical field of coating materials, and discloses a super-hydrophobic fingerprint-resistant coating for a mobile phone screen, which comprises the following raw materials, by mass, 45-55 parts of hydrophobic fluorine-silicon resin, 2-3 parts of ultraviolet absorbent, 0.5-1.5 parts of light stabilizer, 3-3.5 parts of modified carbon nanofiber, 0.4-0.8 part of silane coupling agent, 1.5-2 parts of photoinitiator and 40-45 parts of mixed solvent. The super-hydrophobic anti-fingerprint coating for the mobile phone screen, which is prepared by the invention, is endowed with excellent super-hydrophobic and anti-fingerprint performances by virtue of the synergistic effect of the raw material components and the accurate modification and preparation process design, can effectively reduce the adhesion of stains such as fingerprints on the screen surface, is easy to wipe and clean, and can still keep the cleanliness of the screen after long-term use.

Inventors

  • Hong Anjie
  • LIN XUEPEI
  • YANG XUANDE
  • YANG JINLAI

Assignees

  • 合肥稻丰智谷电子科技有限公司

Dates

Publication Date
20260508
Application Date
20260319

Claims (10)

  1. 1. The super-hydrophobic fingerprint-resistant coating for the mobile phone screen is characterized by comprising the following raw materials in parts by mass: 45-55 parts of hydrophobic fluorosilicone resin, 2-3 parts of ultraviolet absorber, 0.5-1.5 parts of light stabilizer, 3-3.5 parts of modified carbon nanofiber, 0.4-0.8 part of silane coupling agent, 1.5-2 parts of photoinitiator and 40-45 parts of mixed solvent.
  2. 2. The super-hydrophobic anti-fingerprint coating for a mobile phone screen according to claim 1, wherein the ultraviolet absorber is specifically prepared by the following steps: Adding ultraviolet absorbing material and triethylamine into anhydrous dichloromethane, stirring to dissolve, placing in ice water bath at constant temperature, dripping acryloyl chloride into the system, heating to room temperature, stirring continuously for reaction for 100-120min, filtering to remove triethylamine hydrochloride precipitate after the reaction is finished, washing filtrate to neutrality, drying with anhydrous sodium sulfate, and distilling under reduced pressure to remove solvent to obtain ultraviolet absorbent.
  3. 3. The super-hydrophobic anti-fingerprint coating for a mobile phone screen according to claim 2, wherein the molar ratio of the ultraviolet absorbing raw material, triethylamine and acryloyl chloride is (0.05-0.15): (0.1-0.2): (0.1-0.15).
  4. 4. The super-hydrophobic anti-fingerprint coating for a mobile phone screen according to claim 1, wherein the light stabilizer is specifically prepared by the following steps: Dissolving a light-stable raw material and triethylamine in anhydrous dichloromethane, cooling to 0-5 ℃, then dropwise adding acryloyl chloride into the system, continuing to stir at room temperature for reaction, removing salt precipitate by suction filtration, and washing, drying and decompressing to remove the solvent from the organic phase to obtain the light stabilizer.
  5. 5. The super-hydrophobic anti-fingerprint coating for a mobile phone screen according to claim 4, wherein the mole ratio of the light stabilizing raw material, triethylamine and acryloyl chloride is (0.05-0.15): (0.1-0.15): (0.05-0.15).
  6. 6. The super-hydrophobic anti-fingerprint coating for a mobile phone screen according to claim 1, wherein the modified carbon nanofiber is specifically prepared by the following steps: a1, dispersing carbon nanofibers into a nitric acid solution, performing ultrasonic dispersion, heating and refluxing the obtained suspension in an oil bath, and performing magnetic stirring in the whole process; A2, dispersing the carboxylated carbon nanofiber in absolute methanol, performing ultrasonic dispersion until the carboxylated carbon nanofiber is completely suspended, adding perfluorooctyl trimethoxy silane, magnetically stirring at room temperature for 16-24 hours, then heating to 120-130 ℃ and stirring in an oil bath for 1-2 hours, cooling to room temperature after the reaction is finished, centrifugally washing with absolute ethanol, and performing vacuum drying to obtain the modified carbon nanofiber.
  7. 7. The super-hydrophobic fingerprint-resistant coating for a mobile phone screen according to claim 6, wherein in the step A1, the concentration of the nitric acid solution is 4-6mol/L, and the mass-volume ratio of the carbon nano fiber to the nitric acid solution is (50-150) mg/150 mL.
  8. 8. The super-hydrophobic anti-fingerprint coating for a mobile phone screen according to claim 6, wherein in the step A2, the mass ratio of the carboxylated carbon nanofibers to the perfluorooctyl trimethoxysilane is (0.1-0.3): (5-7).
  9. 9. The super-hydrophobic anti-fingerprint coating for a mobile phone screen according to claim 1, wherein the preparation method specifically comprises the following steps: Adding the modified carbon nanofiber and the silane coupling agent in the formula part by mass into a mixed solvent, ultrasonically dispersing the system, then placing the system into a water bath at 40-60 ℃ for stirring, and cooling to room temperature to obtain a modified carbon nanofiber dispersion liquid for standby; And secondly, dropwise adding the modified carbon nanofiber dispersion liquid into the resin mixed liquid, dispersing at a low speed of 1000-1500rpm for 20-30min, performing ultrasonic dispersion to obtain a uniform composite dispersion system, adding a photoinitiator into the composite dispersion system under a light-shielding condition, stirring, filtering, sealing and storing in a light-shielding manner to obtain the super-hydrophobic fingerprint-resistant coating for the mobile phone screen.
  10. 10. The super-hydrophobic fingerprint-resistant coating for a mobile phone screen according to claim 9, wherein the filtration is specifically performed by sequentially performing rough filtration through a 0.8 μm PTFE filter membrane and vacuum fine filtration through a 0.45 μm PTFE filter membrane.

Description

Super-hydrophobic anti-fingerprint coating for mobile phone screen Technical Field The invention relates to the technical field of coating materials, in particular to a super-hydrophobic anti-fingerprint coating for a mobile phone screen. Background In the technical field of coating materials, a hydrophobic anti-fingerprint coating for a mobile phone screen is a key material for improving the use experience and screen protection capability of a mobile phone, and the preparation and application of related coatings in the prior art still have a plurality of problems to be solved urgently. The traditional hydrophobic anti-fingerprint coating for the mobile phone screen is mainly prepared by introducing ultraviolet absorption and light stabilization auxiliary agents in a physical doping mode, the auxiliary agents are not firmly combined with a resin substrate, migration and precipitation are easy to occur in the long-term use process, the ultraviolet protection and light stabilization capability of the coating are fast attenuated, the weather resistance and ageing resistance are poor, the problems of yellowing, performance reduction and the like of the coating are easy to occur, and the service life is limited. Most of the reinforcing fillers adopted by the existing coating are unmodified or simply modified nano materials, the dispersibility in resin is poor, a stable reinforcing structure is difficult to form, the mechanical property and the wear-resistant scraping property of the coating cannot be effectively improved, the film forming property and the surface flatness of the coating can be possibly influenced, the hydrophobic modification effect of the fillers is poor, a synergistic effect is difficult to form with the hydrophobic resin, the super-hydrophobic and anti-fingerprint properties of the coating are improved to a limited extent, and fingerprint stains are still easy to attach and difficult to clean. Meanwhile, the compatibility among the components of the traditional coating is poor, the binding force with a glass substrate is insufficient, the phenomena of coating falling, peeling and the like are easy to occur in daily use, the preparation process condition of part of the coating is harsh, the parameter controllability is poor, the prepared coating has uneven comprehensive performance, the performance stability is difficult to ensure, and the comprehensive requirements of a mobile phone screen on the multiple aspects of hydrophobic fingerprint resistance, mechanical property, weather resistance, adhesive force and the like of the coating cannot be met. Based on the above, the application provides the super-hydrophobic anti-fingerprint coating for the mobile phone screen. Disclosure of Invention Technical problem to be solved Aiming at the defects of the prior art, the invention provides a super-hydrophobic anti-fingerprint coating for a mobile phone screen. Technical proposal In order to achieve the above purpose, the present invention provides the following technical solutions: The super-hydrophobic anti-fingerprint coating for the mobile phone screen comprises the following raw materials in parts by mass: 45-55 parts of hydrophobic fluorosilicone resin, 2-3 parts of ultraviolet absorber, 0.5-1.5 parts of light stabilizer, 3-3.5 parts of modified carbon nanofiber, 0.4-0.8 part of silane coupling agent, 1.5-2 parts of photoinitiator and 40-45 parts of mixed solvent. Further, the mixed solvent is a solution obtained by mixing butyl acetate and propylene glycol methyl ether acetate in a volume ratio of 3:2. Further, the ultraviolet absorber is specifically prepared by the following steps: Adding ultraviolet absorbing material and triethylamine into anhydrous dichloromethane, stirring to dissolve, placing in ice water bath at constant temperature, dripping acryloyl chloride into the system, heating to room temperature, stirring continuously for reaction for 100-120min, filtering to remove triethylamine hydrochloride precipitate after the reaction is finished, washing filtrate to neutrality, drying with anhydrous sodium sulfate, and distilling under reduced pressure to remove solvent to obtain ultraviolet absorbent. Further, the ultraviolet absorber is specifically prepared by the following steps: Adding ultraviolet absorbing raw materials and triethylamine into anhydrous dichloromethane, stirring and dissolving, placing in an ice water bath at 0-5 ℃ for constant temperature, dropwise adding acryloyl chloride into the system, after dropwise adding, heating to room temperature, continuing stirring and reacting for 120min, after the reaction is finished, filtering to remove triethylamine hydrochloride precipitate, washing filtrate with 5wt% sodium bicarbonate solution for 1 time, washing saturated sodium chloride aqueous solution to be neutral, drying with anhydrous sodium sulfate for 4h, and distilling under reduced pressure at 45 ℃ to remove solvent to obtain the ultraviolet absorbent. Further, the u