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On the effects of using CO2 and F2 lasers to modify the wettability of a polymeric biomaterial.

By David Waugh, Jonathan Lawrence, Chris Walton and R. Zakaria

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 CO2 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 CO2 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 and showed that the O2 increased by up to 1.5% At. and decreased by up to 1.6% At. for the CO2 and F2 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

Topics: J511 Engineering Materials, J410 Polymers Technology, H673 Bioengineering
Publisher: Elsevier
Year: 2010
DOI identifier: 10.1016/j.optlastec.2009.08.004
OAI identifier: oai:eprints.lincoln.ac.uk:3336

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Citations

  1. (2004). Adhesion enhancement through control of acid-base interactions, doi
  2. (2007). Bacterial adhesion on the metal-polymer composite coatings, doi
  3. (2008). Biomimetic artificial surfaces quantitatively reproduce the water repellency of a lotus leaf, doi
  4. (2004). Cell interactions with laser-modified polymer surfaces, doi
  5. (1982). Chapter 6 - thermodynamics of wetting: From its molecular basis to technological application,
  6. (2009). CO2 laser generated surface patterns and the effects thereof on the biomimetics and wettability of nylon 6,6.
  7. (2006). Contact angle, adhesion and friction properties of micro- and nanopatterned polymers for superhydrophobicity, doi
  8. (2007). Effects of intrinsic hydrophobicity on wettability of polymer replicas of a superhydrophobic lotus leaf, doi
  9. (2005). Fabrication of superhydrophobic surfaces from microstructured ZnO-based surfaces via a wet-chemical route, doi
  10. (2008). Formation of superhydrophobic poly(dimethysiloxane) by ultrafast laser-induced surface modification, doi
  11. (2007). Gradient polymer surfaces for biomedical applications. doi
  12. (2003). Influence of laser surface modifying of polyethylene terephthalate on fibroblast cell adhesion, doi
  13. (2005). Is the lotus leaf superhydrophobic? doi
  14. (2005). Laser interference lithography as a new and efficient technique for micropatterning of biopolymer surface, doi
  15. (2001). Laser modification of the wettability characteristics of engineering materials, doi
  16. (2005). Laser surface treatment of bio-implant materials, doi
  17. (2007). Laser-assisted modification of polystyrene surfaces for cell culture applications, doi
  18. (2001). Modification of the wettability characteristics of polymethyl methacrylate (PMMA) by means of CO2, Nd:YAG, excimer and high power diode laser irradiation, doi
  19. (2009). Patterned superhydrophobic metallic surfaces, doi
  20. (2007). Polymer Self-Assembled Nano-Structures and Surface Relief Gratings Induced with Laser at 157nm, doi
  21. Precision laser micro-processing of polymers. doi
  22. (2005). Processing of polymers by plasma technologies, doi
  23. (2004). Role of chemical interactions in bacterial adhesion to polymer surfaces, doi
  24. (2007). Surface modification and property analysis of biomedical polymers used for tissue engineering, doi
  25. (2006). Surface modification of polyamide fibers and films using atmospheric plasmas, doi
  26. (2009). The apparent state of droplets on a rough surface, doi
  27. (2007). The surface energy of various biomaterials coated with adhesion molecules used in cell culture, doi
  28. (2008). Topography and wettability control in biocompatible polymer for BioMEMs applications. doi
  29. (2002). Use of radiation in biomaterials science, doi
  30. (2008). Wettability characteristics variation of nylon 6,6 by means of CO2 laser generated surface patterns, ICALEO
  31. (2007). Wetting transition of water droplets on superhydrophobic patterned surfaces, doi

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