Encapsulation of tea polyphenols into high amylose corn starch composite nanofibrous film for active antimicrobial packaging

Lei Chen; Fen Wu; Ming Xiang; Wenna Zhang; Qingxi Wu; Yongming Lu; Jiajun Fu; Meilu Chen; Songnan Li; Yan Chen; Xianfeng Du

doi:10.1016/j.ijbiomac.2023.125245

Encapsulation of tea polyphenols into high amylose corn starch composite nanofibrous film for active antimicrobial packaging

Int J Biol Macromol. 2023 Aug 1:245:125245. doi: 10.1016/j.ijbiomac.2023.125245. Epub 2023 Jun 15.

Authors

Lei Chen¹, Fen Wu¹, Ming Xiang¹, Wenna Zhang¹, Qingxi Wu¹, Yongming Lu¹, Jiajun Fu¹, Meilu Chen¹, Songnan Li², Yan Chen³, Xianfeng Du⁴

Affiliations

¹ Anhui Key Laboratory of Ecological Engineering and Biotechnology, School of Life Sciences, Anhui University, Hefei 230601, China.
² Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou 225009, China.
³ Anhui Key Laboratory of Ecological Engineering and Biotechnology, School of Life Sciences, Anhui University, Hefei 230601, China. Electronic address: chenyan@ahu.edu.cn.
⁴ State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, China. Electronic address: dxf@ahau.edu.cn.

PMID: 37330086
DOI: 10.1016/j.ijbiomac.2023.125245

Abstract

Starch-based composite nanofibrous films loaded with tea polyphenols (TP) were successfully fabricated through electrospinning high amylose corn starch (HACS) with aid of polyvinyl alcohol (PVA), referred as HACS/PVA@TP. With the addition of 15 % TP, HACS/PVA@TP nanofibrous films exhibited enhanced mechanical properties and water vapor barrier capability, and their hydrogen bonding interactions were further evidenced. TP was slowly released from the nanofibrous film and followed Fickian diffusion mechanism, which achieved the controlled sustained release of TP. Interesting, HACS/PVA@TP nanofibrous films effectively improved antimicrobial activities against Staphylococcus aureus (S. aureus) and prolonged the shelf life of strawberry. HACS/PVA@TP nanofibrous films showed superior antibacterial function by by destroying cell wall and cytomembrane, and degrading existing DNA fragments, stimulating excessive intracellular reactive oxygen species (ROS) generation. Our study demonstrated that the functional electrospun Starch-based nanofibrous films with enhanced mechanical properties and superior antimicrobial activities were potential for the application in active food packaging and relative areas.

Keywords: High amylose corn starch; Nanofibrous film; Tea polyphenols.