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Title: Surface treatment of polypropylene (PP) film by 50 Hz dielectric barrier discharge produced in air and argon/air mixture at atmospheric pressure

Thin films of polypropylene (PP) are treated for improving hydrophilicity using non-thermal plasma generated by 50 Hz line frequency dielectric barrier discharge produced in air and argon/air mixture at atmospheric pressure. PP samples before and after the treatments are studied using contact angle measurements, surface free energy calculations and scanning electron microscopy (SEM). Distilled water (H{sub 2}O), glycerol (C{sub 3}H{sub 8}O{sub 3}) and diiodomethane (CH{sub 2}I{sub 2}) are used as test liquids. The contact angle measurements between test liquids and PP samples are used to determine total surface free energy using sessile drop technique. PP films show a remarkable increase in surface free energy after plasma treatment. SEM analysis of the plasma-treated PP films shows that plasma treatment introduces greater roughness on the surface leading to the increased surface free energy. Furthermore, it is found that introducing a small quantity of argon can enhance the surface treatment remarkably.
Authors:
;  [1]
  1. Department of Natural Sciences (Physics), School of Science, Kathmandu University P. O. Box No. 6250, Dhulikhel, Kathmandu, Nepal (India)
Publication Date:
OSTI Identifier:
22488643
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1670; Journal Issue: 1; Conference: EIPT-2015: International conference on emerging interfaces of plasma science and technology, Ujjain (India), 9-10 Mar 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AIR; ARGON; ATMOSPHERIC PRESSURE; DIELECTRIC MATERIALS; FREE ENERGY; GLYCEROL; MIXTURES; PLASMA; POLYPROPYLENE; ROUGHNESS; SCANNING ELECTRON MICROSCOPY; SURFACE TREATMENTS; SURFACES; THIN FILMS; WATER