Development of active rosmarinic acid-gelatin biodegradable films with antioxidant and long-term antibacterial activities. (October 2018)

• Record Type: Journal Article
• Authors: Ge, Liming; Zhu, Mingjin; Li, Xinying; Xu, Yongbin; Ma, Xiaonan; Shi, Rong; Li, Defu; Mu, Changdao
• Is Part Of: Food hydrocolloids. Volume 83(2018)
• Page Start: 308
• Page End: 316
• Publication Date: 2018-10
• Subjects: Gelatin -- Rosmarinic acid -- Edible film -- Dialdehyde xanthan gum -- Conjugation -- Packaging; Hydrocolloids -- Periodicals; Food additives -- Periodicals; Colloïdes -- Périodiques; Aliments -- Additifs -- Périodiques; Colloids; Food additives; Periodicals; Electronic journals; 664.06
• DOI: 10.1016/j.foodhyd.2018.04.052
• Languages: English
• ISSNs: 0268-005X

Abstract

Abstract: 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. Graphical abstract: Image 1 Highlights: Rosmarinic acid was successfully conjugated onto gelatin via EDC/NHS chemistry. Rosmarinic acid-gelatin was used to prepare active edible film. Rosmarinic acid-gelatin edible film possessed excellent ultraviolet barrier capacity. Conjugated rosmarinic acid provided gelatin with effective antioxidant activity. Rosmarinic acid-gelatin edible film showed long-term antibacterial activity.