| CHEN Li,ZHENG Xuejun,HE Chucai,HUANG Le,PENG Jingquan,ZUO Binhuai.Effects of CF4-GMET and G-PT Treatment on Wear Resistance of AR+AF Coating[J],53(13):104-117 |
| Effects of CF4-GMET and G-PT Treatment on Wear Resistance of AR+AF Coating |
| Received:March 10, 2023 Revised:June 07, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.13.011 |
| KeyWord:hydrophobicity CF4 gas micro-etching graphite plasma treatment anti-reflection hydrophobic wear resistance |
| Author | Institution |
| CHEN Li |
Xiangtan University, Hunan Xiangtan , China |
| ZHENG Xuejun |
Xiangtan University, Hunan Xiangtan , China |
| HE Chucai |
Xiangtan University, Hunan Xiangtan , China |
| HUANG Le |
Xiangtan Hongda Vacuum Technology Co., Ltd., Hunan Xiangtan , China |
| PENG Jingquan |
Xiangtan University, Hunan Xiangtan , China |
| ZUO Binhuai |
Xiangtan University, Hunan Xiangtan , China |
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| Abstract: |
| Glass cover plate is an indispensable component of consumer display electronic products, these products will inevitably be stained with fingerprints, grease and other pollutants during use. However, the anti-fouling performance of the existing glass cover plate will gradually fail with the increase of the number of wear during use. Therefore, it is an urgent demand for the market to develop a type of optical hydrophobic glass with excellent wear resistance. When taking account of anti-reflectivity and hydrophobicity at one and the same time, the interfacial bond between antireflective (AR) multi-layer composite film system and anti-fingerprint (AF) coating was strengthened to enhance the mechanical durability of the composite coating. CF4 gas micro-etching treatment (CF4-GMET) and graphite plasma treatment (G-PT) were first combined to treat the surface of the AR multi-layer composite film deposited on the glass substrate by magnetron sputtering in proper sequence, before AF reagent evaporated on the surface of the AR coating is cooled to obtain an AF/CF4-GMET&G-PT SiO2/AR anti-reflective hydrophobic coating with super wear resistance. In order to study the wettability and surface morphology of SiO2 on the AR surface, a water contact angle tester was used to measure the water contact angle and adhesion of samples. The surface morphology and roughness of SiO2 films were characterized by atomic force microscopy. Wear resistance and optical transmittance of samples were measured by friction life testing machine and UV-visible near infrared spectrophotometer, and the wear resistance and optical properties of different samples were compared. The influences of interface adhesion and surface roughness on wear resistance were compared by analyzing the correlation among adhesion, surface morphology and wear resistance test results of samples. After imposed on the AR surface by CF4-GMET, "cylindrical spike" was removed to obtain a low roughness needle surface, to increase the contact ratio surface area between SiO2 and AF coatings. In this process, the hydrophobicity of samples increased, while the adhesion decreased. The adhesion of the SiO2 surface was greatly improved by G-PT to increase the surface hydrophilicity. After two treatments above, the roughness of the SiO2 surface decreased meanwhile the adhesion decreased at first and then rose to the maximum value, which resulted in the significantly enhancement of wear resistance of AF coating evaporated. After 10 000 frictions of steel velvet with the load of 1 000 g, the water contact angle (WCA) value of the anti-reflective hydrophobic coating decreased from 117.7° to 113.6°, with a wear rate of only 3.4% and excellent wear resistance. The results showed that both of the wear resistance and hydrophilicity were enhanced through the treatments of CF4-GMET and G-PT on the surface of the AR composite film system; however, the treatments hardly no impact on optical transmittance. After the micro-etching of SiO2 by CF4-GMET treatment, the surface roughness was reduced and the single-scale roughness structure was also transformed into a multi-scale roughness structure. The appearance of multi-scale roughness structure increased the contact area between the SiO2 layer and the AF layer, which was beneficial to the adhesion and blending of liquid AF reagent during evaporation. G-PT treatment co increases the adhesion of the SiO2 surface and improve the interface strength between the SiO2 layer and the AF layer. This method is easy used to improve the wear resistance of the anti-reflective hydrophobic coating, and it has been widely applications in automotive central control platforms, electronic display covers, and smart wearable products, etc. |
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