Transmission of N atoms through PP membranes for nitrogen flowing post-discharge sterilisation processes
Tipo de documentoArtículo
Fecha de publicación2010
Condiciones de accesoAcceso restringido por política de la editorial
This work reports on the results of investigations conducted with three layered polypropylene (PP) membranes which were exposed to a N2 flowing microwave (100 W) post discharge, at several flow rates (0.03–1 Slm) and at gas pressure from 0.3 to 40 Torr. The N atoms transmission through the membrane was measured from the intensity variation of the N2, 580 nm afterglow which is related to N atom density, before and after the membranes. The results obtained showed that N-atoms penetrate and cross the membranes with a transmission factor (TN) varying from 20 to 70% during the exposure time (15 min), depending on flow rate and gas pressure. A maximum value TN = 0.7 (±0.05) is found for sufficient low flow rate (less than 0.1 Slm), that is for low flow gas velocity (about 2 9 102 cm s-1).
CitaciónRicard, A.; Canal, C. Transmission of N atoms through PP membranes for nitrogen flowing post-discharge sterilisation processes. "Plasma chemistry and plasma processing", 2010, vol. 30, p. 373-379.
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