Surface properties of polymers treated with F2 laser |
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| Authors: | A ?ezní?ková A Chaloupka J Heitz Z Kolská V ?vor?ík |
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| Institution: | 1. Department of Solid State Engineering, Institute of Chemical Technology Prague, 166 28 Prague, Czech Republic;2. Institute of Applied Physics, Johannes Kepler University, 4040 Linz, Austria;3. Department of Chemistry, J.E. Purkyně University, ústí nad Labem, Czech Republic |
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| Abstract: | Selected polymers (polyethylene‐PE, polypropylene‐PP, polytetrafluoroethylene‐PTFE, polystyrene‐PS and polyethylenterephthalate‐PET) were irradiated with the linearly polarized light of a pulsed 157 nm F2 laser. The irradiation results in degradation of polymers and ablation of polymer surfaces. Contact angle, measured by goniometry, was studied as a function of the number of laser pulses. The volume of the ablated polymer layer was determined by gravimetry. Changes in surface morphology and roughness were observed using atomic force microscopy. Surface chemistry of the samples was investigated by electrokinetic analysis and by XPS. While PET and PE exhibit small ablation, the ablation of PS and PTFE is more significant, and the most pronounced ablation is observed on PP. Contact angle of all polymers, with the only exception of PP, is a decreasing function of the number of laser pulses up to 2000 pulses. Laser irradiation leads to a refinement of the polymer surface morphology and a decrease of their surface roughness. Electrokinetic analysis and PS show changes in the surface chemistry of polymers after the laser treatment. Copyright © 2011 John Wiley & Sons, Ltd. |
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| Keywords: | excimer laser laser ablation polymers surface morphology zeta potential |
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