Nanoclay as New Tool for Discoloration of Dyed Denim Garment with Indigo

Up to now, discoloration of the denim garment has been carried out through various methods including mechanical, chemical, physical and enzymatic treatments. In this study, the nanoclay was co-applied in bio stone washing of denim with cellulase to obtain denim garment with a new look and clear effluent. Acid and neutral cellulases along with nanoclay were applied on the dyed denim fabric with indigo and the properties of the treated sample and the obtained effluent were evaluated. The color changes of the denim fabric were investigated using colorimetric methods. The surfaces of the treated samples and montmorillonite in effluent were observed using SEM and TEM, respectively. According to the results, nanoclay as a new tool along with cellulase caused increasing the lightness, decreasing the back-staining, creating a new look and reducing the remained color in the effluent.