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Superficial modification in recycled PET by plasma etching for food packaging
Author(s) -
Cruz S. A.,
Zanin M.,
Nascente P. A. P.,
Bica de Moraes M. A.
Publication year - 2009
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.29958
Subject(s) - contact angle , materials science , wetting , x ray photoelectron spectroscopy , adhesion , etching (microfabrication) , surface roughness , chemical engineering , surface modification , amorphous solid , oxygen , composite material , plasma etching , food packaging , polymer , plasma cleaning , surface finish , plasma , chemistry , layer (electronics) , organic chemistry , food science , physics , quantum mechanics , engineering
An oxygen plasma treatment has been used to improve the adhesion of amorphous hydrogenated carbon (a‐C:H) films onto surfaces of recycled poly(ethylene terephthalate) (PET). Modifications produced by the oxygen plasma on the PET surface in chemical bonds and morphology were investigated by X‐ray photoelectron spectroscopy and atomic force microscopy, respectively. Contact angle measurements were used to study the changes in the surface wettability. Adhesion of the a‐C:H film onto the PET surface was investigated by the tape test method. It was observed that the improvement in film adhesion is in good correlation with the increase in surface roughness, due to plasma etching, and with the appearance of oxygen‐related functional groups at the surface. The results of this study indicate that a‐C:H‐coated recycled PET can be used in food packaging. The a‐C:H film could be used as a functional barrier to reduce or prevent migration of contaminants from the polymer to the package content. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010