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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Waugh, D. G.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (6/6 displayed)
- 2017NiTi shape memory alloy with enhanced wear performance by laser selective area nitriding for orthopaedic applicationscitations
- 2016Laser surface modification of polymeric surfaces for microbiological applicationscitations
- 2014Laser surface engineering of polymeric materials and the effects on wettability characteristicscitations
- 2012Osteoblast cell response to a CO2 laser modified polymeric materialcitations
- 2010On the effects of using CO2 and F2 lasers to modify the wettability of a polymeric biomaterialcitations
- 2009Interaction of CO2 laser-modified nylon with osteoblast cells in relation to wettabilitycitations
Places of action
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article
On the effects of using CO2 and F2 lasers to modify the wettability of a polymeric biomaterial
Abstract
Enhancement of the surface properties of a material by means of laser radiation has been amply demonstrated previously. In this work a comparative study for the surface modification of nylon 6,6 has been conducted in order to vary the wettability characteristics using CO<sub>2</sub> and excimer lasers. This was done by producing 50 μm spaced (with depths between 1 and 10 μm) trench-like patterns using various laser parameters such as varying the laser power for the CO<sub>2</sub> laser and number of pulses for the excimer laser. Topographical changes were analysed using optical microscopy and white light interferometry which indicated that both laser systems can be implemented for modifying the topography of nylon 6,6. Variations in the surface chemistry were evaluated using energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy analysis which showed that the O<sub>2</sub> increased by up to 1.5 at% and decreased by up to 1.6 at% for the CO<sub>2</sub> and F<sub>2</sub> laser patterned samples, respectively. Modification of the wettability characteristics was quantified by measuring the advancing contact angle, which was found to increase in all instances for both laser systems. Emery paper roughened samples were also analysed in the same manner to determine that the topographical pattern played a major role in the wettability characteristics of nylon 6,6. From this, it is proposed that the increase in contact angle for the laser processed samples is due to a mixed intermediate state wetting regime owed to the periodic surface roughness brought about by the laser-induced trench-like topographical patterns.