Surface physico‐chemistry of corona‐discharge‐treated poly(ethylene terephthalate) film

作者：Lesley‐Ann O'Hare, Julie Anne Smith, Stuart R. Leadley, Bhukan Parbhoo, Andrew Goodwin, John F. Watts · 发表于：Surface and Interface Analysis · 年份：2002 · DOI：10.1002/sia.1429 · 被引用次数：51 · 研究领域：Surface Modification and Superhydrophobicity、Advanced Sensor and Energy Harvesting Materials、High voltage insulation and dielectric phenomena

Abstract The effect of energy of corona discharge treatment (CDT) on the physico‐chemistry of the surface of a polyester film was investigated systematically using a number of complementary surface analytical techniques: contact angle analysis, x‐ray photoelectron spectroscopy, time‐of‐flight secondary ion mass spectrometry and atomic force microscopy. The energy of treatment can be controlled by either varying the speed of the treatment with constant power input or by varying the power of the treatment with constant speed. The changes in surface energy, surface chemistry and surface morphology of poly(ethylene terephthalate) (PET) induced by these two modes of CDT have been investigated. The surface energy and the polar contribution of the film increased with increasing energy of corona. Phenolic‐OH, carbonyl and carboxylic acid (HOC=O) have been identified as the functional groups incorporated onto the surface. Low‐molecular‐weight oxidized materials were observed in the form of a globular morphology on the surface of the film. By washing the film in methanol–water prior to surface analysis, it was shown that the oxygen content at the surface of the film decreased and the globular morphology was removed. Differences in the surface energy of corona‐treated PET films have been observed under similar corona energy conditions, depending on whether the sample was treated with constant speed or constant power. However, the total surface oxygen content was found to be similar at l...