Superficial modification in recycled PET by plasma etching for food packaging

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 pho...

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Bibliographic Details
Published in:Journal of applied polymer science 2010-03, Vol.115 (5), p.2728-2733
Main Authors: Cruz, S.A, Zanin, M, Nascente, P.A.P, Bica de Moraes, M.A
Format: Article
Language:English
Subjects:
adhesion
Adhesive bonding
Applied sciences
coating
Contact angle
etching
Exact sciences and technology
Food packaging
Oxygen plasma
PET
plasma
Plasma etching
Polyethylene terephthalates
Polymer industry, paints, wood
Recycled
recycling
Reproduction
Technology of polymers
Waste treatment
Wettability
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Summary: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.
ISSN:0021-8995
1097-4628
1097-4628
DOI:10.1002/app.29958