Water-soluble polysaccharides extracted from Enteromorpha prolifera/PVA composite film functionalized as ε-polylysine with improved mechanical and antibacterial properties

Bing Li; Yingying Yang; Xinhua Kou; Manli Yang; Nodirali Normakhamatov; Abdullah F Alasmari; Bingchang Xin; Yulong Tan

doi:10.1016/j.ijbiomac.2024.136697

Water-soluble polysaccharides extracted from Enteromorpha prolifera/PVA composite film functionalized as ε-polylysine with improved mechanical and antibacterial properties

Int J Biol Macromol. 2024 Oct 18;282(Pt 1):136697. doi: 10.1016/j.ijbiomac.2024.136697. Online ahead of print.

Authors

Bing Li¹, Yingying Yang², Xinhua Kou², Manli Yang³, Nodirali Normakhamatov⁴, Abdullah F Alasmari⁵, Bingchang Xin⁶, Yulong Tan⁷

Affiliations

¹ Marine Science and Engineering College, Qingdao Agricultural University, Qingdao 266109, China.
² College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China; Special Food Research Institute, Qingdao Agricultural University, Qingdao 266109, PR China; Key Laboratory of Special Food Processing (Co-construction by Ministry and Province), Ministry of Agriculture Rural Affairs, Qingdao Agricultural University, Qingdao 266109, China; Shandong Technology Innovation Center of Special Food, Qingdao 266109, China.
³ College of Chemistry and Pharmaceutical Science, Qingdao Agricultural University, Qingdao 266109, PR China.
⁴ Tashkent Pharmaceutical Institute, Ministry of the Health of Uzbekistan, Aybek str, 45, Tashkent 100015, Uzbekistan.
⁵ Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
⁶ Department of Cariology and Endodontology, Qingdao Stomatological Hospital Affiliated to Qingdao University, Qingdao, China. Electronic address: xinbingchang@163.com.
⁷ College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China; Special Food Research Institute, Qingdao Agricultural University, Qingdao 266109, PR China; Key Laboratory of Special Food Processing (Co-construction by Ministry and Province), Ministry of Agriculture Rural Affairs, Qingdao Agricultural University, Qingdao 266109, China; Shandong Technology Innovation Center of Special Food, Qingdao 266109, China. Electronic address: tanyulong@qau.edu.cn.

PMID: 39427792
DOI: 10.1016/j.ijbiomac.2024.136697

Abstract

The issue of environmental protection has received sustained and widespread attention. In order to reduce environmental pollution related to traditional plastics, it is an incessant demand to design novel environment-friendly food packaging materials with excellent performance. Sulfated polysaccharide extracted from the "green tide" marine pollution Enteromorpha prolifera (SPE) has been innovatively transformed into a film-forming material for better utilization. The insufficient mechanical properties and limited functionalities, however, hinder its wide application. In this study, polyvinyl alcohol (PVA) was blended to enhance its mechanical properties and ε-polylysine (ε-PL) was incorporated to endow it with antimicrobial performance. A novel and biodegradable film composed of SPE, PVA, and ε-PL was fabricated by casting method. We further determined the physicochemical properties of composited films. Mechanical performance test revealed the tensile strength of SPE-PVA-PL films increased from 5.56 MPa to 6.65 MPa and the E% increased from 128.8 % to 246.9 % compared with that of SPE-PVA films. Antimicrobial tests showed the excellent antibacterial activity of SPE-PVA-PL films against representative microbial species, Staphylococcus aureus and Escherichia coli. The results of this study suggested that the SPE-based composite film has the potential to be used as a potential food packaging and wound dressing materials.

Keywords: Antimicrobial properties; Enteromorpha prolifera; Packaging film; ε-Polylysine.