高濃度オゾンガスによるステンレス鋼繊維不織布の表面改質と再生処理

概要

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Highly-concentrated gaseous ozone of 15 vol% was produced from an ozone-oxygen mixture (5 vol%), generated from a pure oxygen-fed discharge ozonizer, by using silica-gel as an adsorbent. The nonwoven fabrics of stainless steel fiber were treated with 15 vol% gaseous ozone for 60 min. As a result of the ozone treatment, the total amount of metal ions dissolved from the ozone-treated stainless steel fiber during immersion in pure water decreased by 70% compared with that from non-ozone-treated stainless steel fiber. X-ray photoelectron spectroscopic analysis showed that Fe and O were enriched by 1.6-fold in the outermost surfaces of the stainless steel fiber after ozone treatment. It was suggested that the formation of a highly resistant Fe-oxide film was responsible for the improvement of corrosion resistance. Pretreatment of protein-fouled nonwoven fabrics of stainless steel fiber by 15 vol% gaseous ozone for 30 min markedly facilitated the removal of protein during subsequent rinsing and caustic alkali cleaning through the decomposition of protein molecules by O3 oxidation. In addition, fungi, Penicillium chrysogenum and Alternaria altenata, were completely sterilized by treatment with 15 vol% gaseous ozone for 1 min. The results indicated that surface modification, cleaning, and sterilization of nonwoven fabric of stainless steel fiber could be performed by its exposure to 15 vol% gaseous ozone.
社団法人表面技術協会の論文
2006-06-01