Journal
PLASMA PROCESSES AND POLYMERS
Volume 13, Issue 9, Pages 869-878Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ppap.201500218
Keywords
plasma coating; plasma etching; polymer blends; surface morphology; water contact-angle (WCA)
Funding
- Croatian Science Foundation [UIP-2014-09-3154]
- Institut Pierre Gilles de Gennes (IPGG) under the investment program Equipex [ANR-10-EQPX-34]
- Hubert Curien Partnership (PHC) Cogito
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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 mu m wide and approximately 125 mu m away from each other, which after the fluorocarbon-based treatment has very high contact angle (>120 degrees). Without the etching, due to smooth surface, PLA/PE-LD 90/10 polymer blend contact angle is between 100 degrees and 110 degrees.
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