Modification of polylactic acid fibers with lipases

Lipase L3126 was chosen to modify the surface of polylactic acid fibers in terms of the measurement of weight loss percentage.Through the series experiments,technical conditions were optimized and the factors of enzyme deweighting were discussed.The results showed that the optimal conditions for lipase L3126 were determined: enzyme concentration(0.5 g/L),pH 8.5,treating at(45 ℃) for 8 hours.It indicated elementarily that the hydrolysis could produce lactic acid substance by using UV analysis.After dyeing with reactive black SEO,reactive blue HN-GR and basic blue X-GB,K/S values of the treated fibers was higher than untreated fibers obviously.