2023 Volume 74 Issue 11 Pages 627-636
In this study, rayon fibers that are known for effectively adsorbing and decomposing ammonia molecules were investigated in order to develop fibers with excellent deodorant effects. For this, roughened rayon fibers were prepared, and the fiber surfaces were impregnated with peroxo-modified anatase sol (hereinafter abbreviated as “PA sol”) under high temperature and pressure conditions. The fibers obtained were evaluated for their adsorption/degradation effects using ammonia gas.
The results revealed that porous rayon fibers treated with cellulase exhibited a stronger gas adsorption effect compared to untreated fibers. Moreover, when such treated fibers were heated, a relatively high concentration of adsorbed ammonia gas was detected, indicating the fibers' substantial capacity for adsorbing ammonia molecules. Furthermore, when the fiber was impregnated with PA sol, the concentration of ammonia gas released from the fiber decreased following light irradiation. This may be attributed to the degradation of ammonia molecules owing to the photocatalytic effect. This tendency became more apparent after a long period of time: after 7 to 10 days, the ammonia gas was completely undetectable.
