Wettability Interpretation of Oxygen Plasma Modified Poly(methyl methacrylate)

Citations Over TimeTop 10% of 2004 papers

Abstract

Poly(methyl methacrylate) (PMMA) has been modified via a dc pulsed oxygen plasma for different treatment times. The modified surfaces were characterized by X-ray photoelectron spectroscopy (XPS), optical profilometer, zeta potential, and advancing contact angle measurements. The measured advancing contact angles of water decreased considerably as a function of discharge. Several oxygen-based functionalities (carbonyl, carboxyl, carbonate, etc.) were detected by XPS, while zeta potential measurements confirmed an increase in negative charge for the treated PMMA surface. Evaluating the correlation between the concentration of polar chemical species and zeta potential, we found that increase in surface hydrophilicity results from the coeffect due to incorporation of oxygen functional groups and creation of charge states. The electrical double layer (EDL) effect was also considered in contact angle interpretation by introducing an additional surface tension term into Young's equation. We also found that EDL contribution to the solid-liquid interfacial tension is negligible and can be safely ignored for the systems considered here.

Related Papers

• → Surface modification of polyamide fibers and films using atmospheric plasmas(2006)151 cited
• → Adhesion of Escherichia coli on to a series of poly(methacrylates) differing in charge and hydrophobicity(1991)159 cited
• → Effect of oxygen plasma treatment on surface charge and wettability of PVC blood bag—In vitro assay(2006)55 cited
• → The effect of side chains on the reactive rate and surface wettability of pentablock copolymers by ATRP(2013)4 cited
• → Stereoregular poly(alkyl methacrylate)s: polymer-polymer and copolymer-polymer blends(1985)17 cited