Influence of biodegradable film containing trehalose on fresh-keeping and colour protection of chilled meat

In order to study the influence of biodegradable film containing trehalose on fresh-keeping and colour protection of chilled meat,the high barrier poly(propylene carbonate)(PPC) film with traces of trehalose(TH)was prepared by coating with poly(vinyl alcohol)(PVA) in this study. The chilled meat was vacuum packaged with PPC/PVA/PPC-TH,PPC/PVA/PPC,PA/PE multilayer film and PE film. The sensory,chemical,microbiological of the chilled meat were tested regularly during cold storage to determine their shelf life. The results showed that the shelf life of chilled meat packaged with PPC/PVA/PPC-TH multilayer film could achieve 28 ~32 days,but samples packaged with PPC/PVA/PPC and PA/PE multilayer film just could achieve 20 days and PE film only 12 days. During the storage time,p H value,color,total bacterial count,the drip loss and total volatile basic nitrogen(TVB-N) values of chilled meat packaged with PPC/PVA/PPC-TH were better than that of PPC/PVA/PPC,PA/PE and PE films. The results suggested that PPC/PVA/PPC-TH film could inhibit microbial growth greatly,extend the shelf life and keep good colour of chilled meat.