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Enzymatic Desizing of Polyvinyl Alcohol from Cotton Fabrics
Author(s) -
Mori Tatsuma,
Sakimoto Michio,
Kagi Takashi,
Saki Takuo
Publication year - 1997
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/(sici)1097-4660(199702)68:2<151::aid-jctb612>3.0.co;2-h
Subject(s) - polyvinyl alcohol , oxidizing agent , chemistry , chromatography , degradation (telecommunications) , nuclear chemistry , pulp and paper industry , materials science , organic chemistry , engineering , telecommunications , computer science
Enzymatic degradation of polyvinyl alcohol (PVA) was used for the desizing of cotton fabrics. A mixture of two different PVA‐degrading enzyme activities, including PVA oxidizing, was partially purified from the culture filtrate of a PVA‐degrading mixed culture by ionic exchange chromatography. Optimum conditions for PVA‐degradation by using this enzyme mixture were pH 8·0 and temperatures ranging from 30°C to 55°C. Cotton fabrics sized with a PVA solution (25 g dm −3 ) were desized with the enzyme mixture after a 1 h treatment at 30°C and pH 8·0. In this case, similar amounts of residual PVA in fabrics were detected in comparison with the conventional desizing process which uses hot water (80°C, 30 min). Minimum amounts of residual PVA were found when the enzymatic desizing time was extended to 6 h. Also, the PVA content in the liquid waste from the enzymatic desizing carried out during 4 h was negligible with a 7·4‐fold increase in the biochemical oxygen demand as compared with the initial value. © 1997 SCI.