Performance of viscose rayon based activated carbon fabric modified by sputtering silver and continuous plasma treatment

摘要

In this study, the preparation of viscose rayon based activated carbon fabric (ACF) absorbents with antibacterial abilitynand modifications introduced by silver sputtering has been investigated. Viscose rayon based knitted fabric, pre-treatednby a composite flame retardant, was used as the precursor. The fabric then underwent oxidation, carbonization andnactivation processes in a semi-open high-temperature erect furnace with a steam activator to produce ACF absorbents.nExperimental results have shown that the ACF absorbents produced by the action of mixing steam and air had the largestnBET specific surface area at about 1713m2/g and the absorption amount of carbon tetrachloride was about 100.5%.nHowever, the BET specific surface area of ACF-Ag adsorbents decreased because pores were destroyed by etching andndeposition of silver particles. The ACF-Ag adsorbent, however, showed effective antibacterial and sterilizing properties.nWhen the ACF-Ag adsorbent was placed in deionized water, a large amount of Ag ions eluted within the first 48 h. Thenelution gradually decreased after 96 h with about 0.2855 ppm of Ag ions eluting after seven days.