Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 137, Issue -, Pages 307-316Publisher
ELSEVIER
DOI: 10.1016/j.ijbiomac.2019.07.009
Keywords
Polypheols; Chitosan; Colored rice; Antioxidant; Intelligent; Packaging film
Funding
- National Natural Science Foundation of China [31571788]
- Natural Science Foundation of Jiangsu Province [BK20151310]
- Qing Lan Project of Jiangsu Province and High Level Talent Support Program of Yangzhou University
Ask authors/readers for more resources
Polyphenol-rich purple rice extract (PRE) or black rice extract (BRE) was incorporated into chitosan (CS) to develop antioxidant and pH-sensitive packaging films. Effect of extract content on the structural, physical and functional properties of CS-PRE and CS-BRE films was investigated. Results showed BRE had higher total phenol and anthocyanin contents than PRE. Scanning electron microscope showed that 1 wt% of PRE or BRE was compatible with film matrix, whereas 3 and 5 wt% of the extract significantly decreased the homogeneity of film matrix. Fourier transform infrared spectroscopy and X-ray diffraction further indicated that intermolecular hydrogen bonds formed between CS and the extract. Notably, the incorporation of PRE or BRE increased the thickness, light barrier property and antioxidant activity of CS film. Moreover, the water vapor barrier property and tensile strength of CS-PRE and CS-BRE films first increased and then decreased with the increase of extract content. Due to abundant anthocyanins in the extract, CS-PRE and CS-BRE films were pH-sensitive in different buffer solutions. When used to monitor pork spoilage, CS-PRE films showed more significant color changes than CS-BRE films. Our results suggested CS-PRE films could be used as antioxidant and intelligent packaging films in food industry. (C) 2019 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available