engleski

Designing Hydrophobicity of the PLA Polymer Blend Surfaces by ICP Etching

A novel method for designing hydrophobicity of the polylactide / low-density polyethylene (PLA/PE-LD) blends by creating specific surface topography is proposed. In order to increase hydrophobicity by changing the topography of two-phase PLA polymer blend surface, blends are etched by using ICP before the fluorocarbon- based coating treatment done in the second step. During the surface treatment process PLA is etched significantly more than PE-LD and specific "island-like" surface morphology is created. It has small pillars 15 μm wide and approximately 125 μm away from each other, which after the fluorocarbon-based treatment has very high contact angle (>120°). Without the etching, due to smooth surface, PLA/PE-LD 90/10 polymer blend contact angle is between 100° and 110°.

plasma coating ; plasma etching ; polymer blends ; surface morphology ; water contact-angle (WCA)

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