Wettability characteristics variation of PMMA by means of CO2 laser generated surface patterns

D. G. Waugh, J. Lawrence

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

CO2 lasers can be seen to lend themselves to materials processing applications and have been used extensively in research and industry. This work investigated the surface modification of PMMA with a CO2 laser in order to vary wettability characteristics. The wettability characteristics of the PMMA were modified by generating a number of patterns of various topography on the sample surfaces using a CO2 laser. Through white light interferometry it was found that for all laser patterned samples the surface roughness had significantly increased by up to 3.1 μm. The chemical composition of selected samples were explored using X-ray photoelectron spectroscopy and found that the surface oxygen content had risen by approximately 4% At. By using a sessile drop device it was found that 50 μm dimensions gave rise to a more hydrophilic surface; whereas 100 μm dimensions gave rise to either no change or an increase in contact angle making the PMMA hydrophobic. This can be explained by the possibility of different wetting regimes taking place owed to the variation of topographies over the as-received and laser patterned samples.
Original languageEnglish
Title of host publicationICALEO® 2009
Subtitle of host publication28th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing
PublisherAIP Publishing
Pages1236-1244
Number of pages9
Volume2009
ISBN (Print)9780912035598
DOIs
Publication statusPublished - 1 Nov 2009
Externally publishedYes
Event28th International Congress on Applications of Lasers and Electro-Optics -
Duration: 2 Nov 20095 Nov 2009

Publication series

NameICALEO 2009 - 28th International Congress on Applications of Lasers and Electro-Optics, Congress Proceedings

Conference

Conference28th International Congress on Applications of Lasers and Electro-Optics
Abbreviated titleICALEO 2009
Period2/11/095/11/09

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