The goal of this study was to investigate the interaction of a lypolytic enzyme with poly-(ethylene terephthalate) (PET). Chemical, physical and structural changes induced on PET substrates with different degree of crystallinity were systematically investigated by water contact angle measurements and FTIR-ATR analyses. Treatment of PET with a commercial cutinase resulted in increased hydrophylicity and improved wettability of the PET materials. Water contact angle measurements indicate that cutinase displayed higher hydrolytic activity towards less crystalline PET. FTIR-ATR allowed to elucidate some chemical and structural features of the enzymatically-modified PET surface and provided some insight into the mechanism of the interaction of the lypolytic enzyme with PET.
Water contact angle and FTIR study of the surface modification of PET by lipolytic enzymes.
TADDEI, PAOLA;
2008
Abstract
The goal of this study was to investigate the interaction of a lypolytic enzyme with poly-(ethylene terephthalate) (PET). Chemical, physical and structural changes induced on PET substrates with different degree of crystallinity were systematically investigated by water contact angle measurements and FTIR-ATR analyses. Treatment of PET with a commercial cutinase resulted in increased hydrophylicity and improved wettability of the PET materials. Water contact angle measurements indicate that cutinase displayed higher hydrolytic activity towards less crystalline PET. FTIR-ATR allowed to elucidate some chemical and structural features of the enzymatically-modified PET surface and provided some insight into the mechanism of the interaction of the lypolytic enzyme with PET.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
