摘要
This paper reports the effects of long- distance and direct argon radio frequency (RF) plasma surface treatment on polyvinyl chloride (PVC) films in terms of changes in surface wettability and surface chemistry. The surface properties are char- acterized by the water contact angle measurement, X-ray photoelectron spectroscopy (XPS) and scan- ning electron microscopy (SEM). The mechanism is further analyzed and the role of all kinds of active species, e.g. electrons, ions and free radicals in- volved in plasma surface modification is further evaluated. Results show that the long-distance and direct RF plasma treatments modify the PVC surface in morphology and composition, and both modifica- tions cause surface oxidation of PVC films, in the forming of functional groups enhancing polymer wet- tability. The effect of the long-distance argon RF plasma is more notable. This suggests that long-distance argon RF plasma could restrain the ion and electron eroding effect and enhance free radical reaction.
This paper reports the effects of longdistance and direct argon radio frequency （RF） plasma surface treatment on polyvinyl chloride （PVC） films in terms of changes in surface wettability and surface chemistry. The surface properties are characterized by the water contact angle measurement, X-ray photoelectron spectroscopy （XPS） and scanning electron microscopy （SEM）. The mechanism is further analyzed and the role of all kinds of active species, e.g. electrons, ions and free radicals involved in plasma surface modification is further evaluated. Results show that the long-distance and direct RF plasma treatments modify the PVC surface in morphology and composition, and both modifications cause surface oxidation of PVC films, in the forming of functional groups enhancing polymer wettability. The effect of the long-distance argon RF plasma is more notable. This suggests that long-distance argon RF plasma could restrain the ion and electron eroding effect and enhance free radical reaction.
基金
supported by the National Natural Science Foundation of China(Grant No.20174030)
the specialized research Fund for the Doctoral Program of Higher Education(20010698007)
the Scientific Research Star Fund for the Study Abroad Returnee and the Key Scientific Technique Item of Shaanxi Province(2001[345]).
