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Quantitative test method for evaluation of anti-fingerprint property of coated surfaces |
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| Authors: | Linda YL Wu SK NgianZ Chen DTT Xuan |
| Institution: | a Surface Technology Group, Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075 b School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798 c Environmental Engineering, Faculty of Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore 117576 |
| Abstract: | An artificial fingerprint liquid is formulated from artificial sweat, hydroxyl-terminated polydimethylsiloxane and a solvent for direct determination of anti-fingerprint property of a coated surface. A range of smooth and rough surfaces with different anti-fingerprint (AF) properties were fabricated by sol-gel technology, on which the AF liquid contact angles, artificial fingerprint and real human fingerprints (HF) were verified and correlated. It is proved that a surface with AF contact angle above 87° is fingerprint free. This provides an objective and quantitative test method to determine anti-fingerprint property of coated surfaces. It is also concluded that AF property can be achieved on smooth and optically clear surfaces. Deep porous structures are more favorable than bumpy structure for oleophobic and AF properties. |
| Keywords: | Anti-fingerprint Contact angle Oleophobicity Hydrophobicity Coating |
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