Enzymatic degradation of poly(ε-caprolactone) film in phosphate buffer solution containing lipases

The enzymatic degradation of poly(ε-caprolactone) (PCL) films in phosphate buffer solution containing lipases has been studied by DSC, WAXD and SEM. Three Upases, pseudomonas lipase (PS), porcine pancreatic lipase (PP), and Candida cylindracea lipase (AY), were used. The results showed that the degradation of PCL films in phosphate buffer solution containing PP or AY was very slow: no weight loss could be found within 1 week. However, PCL film could degrade rapidly and completely within 4 days in phosphate buffer solution containing PS lipase.