Enzymatic pre-treatment of cotton. Part 2. Peroxide generation in desizing liquor and bleaching
Research and development
Authors:
- Aniş Pervin
Department of Textile Engineering, Faculty of Engineering & Architecture, University of Uludag, Bursa, Turkey - Davulcu Asim
Department of Textile Engineering, Faculty of Engineering, University of Erciyes, Kayseri, Turkey - Eren Hüseyin Aksel
Department of Textile Engineering, Faculty of Engineering & Architecture, University of Uludag, Bursa, Turkey
 Full text | Abstract: The objective of this study was to utilise desizing liquors of starch-sized fabrics using glucoseoxidase enzymes for bleach to produce hydrogen peroxide from glucose units of the starch removed; glucoseoxidase enzymes are efficient only at high glucose doses. In the first part of this paper, glucose generation in a desizing bath was discussed and an optimum recipe was obtained with an amyloglucodidase/pullanase mixture enzyme . In this study, process optimisation for the glucose oxidase enzyme was undertaken in order to generate hydrogen peroxide in the desizing liquor and then bleaching with the peroxide generated . Results indicated that sufficient hydrogen peroxide, about 800 mg l-1, could be generated to perform successful enzymatic bleaching; however, the bleaching was compatible with the conventional peroxide type only in the alkali pH range. The maximum whiteness obtained by enzymatic treatment was 73.8 Stensby degree, whereas the whiteness of the conventionally treated fabric was 79.4 Stensby degree. |
Tags: enzymatic bleaching, cotton, glucose, glucose oxidase, peroxide, whiteness.
Citation: Aniş P., Davulcu A., Eren H. A.; Enzymatic Pre-Treatment of Cotton. Part 2: Peroxide Generation in Desizing Liquor and Bleaching. FIBRES & TEXTILES in Eastern Europe 2009, Vol. 17, No. 2 (73) pp. 87-90.