title: Ultrasonic effect on the desizing efficiency of α-amylase on starch-sized cotton fabrics.
abstract: Enzymatic desizing by α-amylase and ultrasound irradiation are the two important clean technologies in the textile industry. In the present work, with the aim of giving a further insight to the influence of ultrasound on α-amylase activity and its desizing efficiency, the ultrasound-based experiments were afforded in two ways: (i) step-wise treatment of α-amylase by ultrasound and then enzymatic desizing, as well as; (ii) simultaneous utilization of ultrasound and α-amylase for the desizing. By the step-wise strategy, it is found that the ultrasound has negative impact on the α-amylase activity using soluble starch as substrate. However, the sonicated α-amylase possesses higher desizing efficiency because there are higher hydrophobic interactions between sonicated α-amylase protein and starch-sized cotton and thus intensifies its catalytic activity. By the simultaneous procedure, the enhancement to desizing efficiency is more pronounced than that by the step-wise procedure. This can be attributed to comprehensive actions of several reasons such as more effective stirring/mixing mechanism, damages or changes to substrate, more effective catalysis to hydrolytic reactions and faster removal of loosened products from the fabric bulk.
authors.affiliation: Chemistry and Environment College of Qingdao University, Qingdao 266071, China. hlyqdu@hotmail.com
authors.forename: Longyun
authors.initials: L
authors.lastname: Hao
authors.forename: Rui
authors.initials: R
authors.lastname: Wang
authors.forename: Kuanjun
authors.initials: K
authors.lastname: Fang
authors.forename: Jingquan
authors.initials: J
authors.lastname: Liu
mesh_terms: D032561:Cotton Fiber; D013016:Sound; D013213:Starch / Q000737:chemistry; D013784:Textiles; D000516:alpha-Amylases / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D013213:Starch; D000516:alpha-Amylases