Wettability characteristics variation of nylon 6,6 by means of CO2 laser generated surface patterns

Waugh, David and Lawrence, Peter (2008) Wettability characteristics variation of nylon 6,6 by means of CO2 laser generated surface patterns. In: ICALEO 2008, October 20-23 2008, Pechanga, CA, USA.

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Official URL: https://www.laserinstitute.org/laserinsights/2009/...

Abstract

CO2 lasers can be seen to lend themselves to materials processing applications. These types of lasers have been used extensively in research and industry with the work carried out being well documented. This work investigated the surface modification of nylon 6,6 with a CO2 laser in order to vary wettability characteristics. The wettability characteristics of the nylon 6,6 were modified by generating a number of patterns of various topography on the surface using the CO2 laser. Thereafter the as-received and modified surfaces were analysed using white light interferometry to quantify the topographical changes. Any changes in the chemical composition of the surfaces were explored with EDX and XPS analysis. To quantify the wettability characteristics as a function of laser irradiation, contact angles where determined using a sessile drop device for each sample. In this way it was possible to determine the efficacy of the CO2 laser generated topographical patterns in terms of wettability characteristics modification. It has been proposed that the increase in contact angle for the laser irradiated samples is due to a change in wetting regime from Wenzel to Cassie-Baxter.

Item Type:Conference or Workshop Item (Presentation)
Additional Information:CO2 lasers can be seen to lend themselves to materials processing applications. These types of lasers have been used extensively in research and industry with the work carried out being well documented. This work investigated the surface modification of nylon 6,6 with a CO2 laser in order to vary wettability characteristics. The wettability characteristics of the nylon 6,6 were modified by generating a number of patterns of various topography on the surface using the CO2 laser. Thereafter the as-received and modified surfaces were analysed using white light interferometry to quantify the topographical changes. Any changes in the chemical composition of the surfaces were explored with EDX and XPS analysis. To quantify the wettability characteristics as a function of laser irradiation, contact angles where determined using a sessile drop device for each sample. In this way it was possible to determine the efficacy of the CO2 laser generated topographical patterns in terms of wettability characteristics modification. It has been proposed that the increase in contact angle for the laser irradiated samples is due to a change in wetting regime from Wenzel to Cassie-Baxter.
Keywords:CO2 laser, surface treatment, wettability, nylon 66
Subjects:F Physical Sciences > F830 Topography
J Technologies > J221 Pattern Making
J Technologies > J410 Polymers Technology
F Physical Sciences > F361 Laser Physics
Divisions:College of Science > School of Engineering
ID Code:3340
Deposited By: David Waugh
Deposited On:14 Sep 2010 08:25
Last Modified:13 Mar 2013 08:46

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