Influence of steam and dry heat pretreatment on fibre properties and cellulase degradation of cellulosic fibres |
| |
Authors: | Christian Schimper Rupert Keckeis Constanta Ibanescu Eduard Burtscher Avinash P. Manian Thomas Bechtold |
| |
Affiliation: | a Christian-Doppler Laboratory for “Textile and Fibre Chemistry of Cellulosics”, Institute of Textile Chemistry and Textile Physics of Leopold-Franzens-University Innsbruck, Dornbirn, Austriab Institute of Textile Chemistry and Textile Physics of Leopold-Franzens-University Innsbruck, Dornbirn, Austria |
| |
Abstract: | Cellulosic fabric samples of cotton, viscose, lyocell and modal were pretreated with steam and dry heat in the range of 100-190°C. The samples were then treated with a Trichoderma reesei cellulase preparation (total culture filtrate - TC), with mechanical agitation, at a high enzyme dosage of 75% by weight of fabric, for 8 hours. Generally, viscose proved to be easily degradable, followed by cotton and modal. The degree of hydrolysis was the least for Lyocell. Dry heat pretreatments exerted a lower influence on degradation rate than steam pretreatments which showed a distinct maximum at a steam temperature of 130°C. The hydrolysis rate varied strongly depending on treatment conditions and fibre type. Water retention values in treated substrates were changed by up to 20% of initial values. |
| |
Keywords: | Cellulose Cellulase Pretreatment Degradation rate Protein loss Water retention value |
本文献已被 InformaWorld 等数据库收录! |
|