Deodorizing Properties of Cotton Fabrics Dyed with Direct Dyes and a Copper Salt
2002
Kobayashi, Yasuko | Sekiguchi, Ayaka | Nakanishi, Tadashi | Komiyama, Jiro
Cotton fabric with a deodorizing function is prepared by mordant dyeing with direct dyes containing copper ions and copper(II) nitrate. The effects of pre- and after-mordant ings and after-treatment with copper(II) nitrate are examined for C.I. Direct Violet 47 and C.I. Direct Black 112. The copper ion uptake of cotton dyed with pre- and after mordantings is about 1/10 the value for wool samples. The elimination of ethyl mercaptan from air by the mordant dyed fabrics is measured in a Teddler bag. Untreated cotton fabric shows no deodorizing ability, but each of the pre-mordanted, dyed, after-mordanted, and after-treated fabrics shows a considerable deodorizing ability. The effects of after mordanting and after-treatment are particularly notable, implying that they are caused by dye-copper ion complexes.
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