Characterization of antibacterial bacterial cellulose composite membranes modified with chitosan or chitooligosaccharide. (1st February 2020)

• Record Type: Journal Article
• Authors: Yin, Nan; Du, Renpeng; Zhao, Fangkun; Han, Ye; Zhou, Zhijiang
• Is Part Of: Carbohydrate polymers. Volume 229(2020)
• Publication Date: 2020-02-01
• Subjects: Bacterial cellulose -- Chitosan -- Chitooligosaccharide -- Composite membranes -- Antibacterial properties; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2019.115520
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: Bacterial cellulose-chitooligosaccharide composites were prepared by immersion. SEM, FT-IR and TGA demonstrated the incorporation of chitooligosaccharide. Bacterial cellulose-chitooligosaccharide performed good antibacterial properties. Composites modified with chitosan and chitooligosaccharide were compared. Abstract: To synthesize biomaterials for antibacterial applications, chitosan (CS) and chitooligosaccharide (COS) were successfully incorporated into bacterial cellulose (BC) matrix respectively. The representative Gram-positive bacteria ( Staphylococcus aureus ) and Gram-negative bacteria ( Escherichia coli ) were selected to evaluate the antibacterial effects of the composite membranes. The results manifested BC-CS and BC-COS membranes exhibited remarkable antibacterial properties against both bacteria with the inhibition ratio of 99.99 ± 0.01% ( S. aureus ) and 99.99 ± 0.01% ( E. coli ) for BC-CS, 99.64 ± 0.18% ( S. aureus ) and 90.56 ± 0.06% ( E. coli ) for BC-COS. The morphology obtained by scanning electron microscopy (SEM) showed BC-CS and BC-COS composite membranes possessed lower porosity and denser structure in comparison to pure BC. Moreover, in contrast with BC-CS, BC-COS performed better mechanical properties and also displayed stronger ABTS radical scavenging capacity of 92.62 ± 2.85%. These results suggested that the development of BC-COS composite membrane would open up the possibility for the antibacterial applications in food and medical fields.