Development of active rosmarinic acid-gelatin biodegradable films with antioxidant and long-term antibacterial activities

作者：Ge, Liming; Zhu, Mingjin; Li, Xinying; Xu, Yongbin^*; Ma, Xiaonan; Shi, Rong; Li, Defu^*; Mu, Changdao

来源：Food Hydrocolloids, 2018, 83: 308-316.

DOI：10.1016/j.foodhyd.2018.04.052

• Gelatin
• Rosmarinic acid
• Edible film
• Dialdehyde xanthan gum
• Conjugation
• Packaging

It is significant to develop new approaches to incorporate naturally active agents into gelatin-based edible films for effective antioxidant and long-term antibacterial activities. Here the naturally active compound rosmarinic acid (RosA) was firstly conjugated onto gelatin backbone via EDC/NHS chemistry. Then the conjugates were plasticized by glycerol and crosslinked by dialdehyde xanthan gum to fabricate active RosA-gelatin edible films. The results indicate that the RosA-gelatin edible films present good water resistance property, strong mechanical property and excellent ultraviolet light barrier ability. The conjugation of RosA confers gelatin-based edible films with effective antioxidant and antibacterial activities as expected. It is interesting that RosA-gelatin edible films after 3 months of storage still show good antibacterial activity as that of newly prepared ones, demonstrating the long-term antibacterial activity. Overall, the fabricated RosA-gelatin edible films may have promising application in the fields of food and pharmaceutical packaging.

• 出版日期2018-10
• 单位西南民族大学; 四川大学; 内蒙古科技大学