Mechanical and antibacterial properties of ZnO/chitosan bio-composite films
Küçük Resim Yok
Tarih
2021
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
WALTER DE GRUYTER
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In the current study, ZnO/chitosan bio-composite films were produced via solution-casting method. Two different ZnO powders, micrometer (d(50) approximately equal to 1.5 mu m) and nanometer sized (d(50) approximately equal to 100 nm), were used to investigate the effect of ZnO particle size and concentration (0, 2, and 8% w/w of chitosan) on the mechanical and antibacterial properties of the ZnO/chitosan bio-composite films. The incorporation of the ZnO powders into the chitosan film resulted in an increase in the tensile strength (TS) and a decrease in the elongation at break (EB) values. Mechanical test results revealed that TS and EB properties were considerably affected (p < 0.05) by the concentration and particle size of the ZnO reinforcement. Disc diffusion method demonstrated good antibacterial activities of bio-composite films containing high amount of ZnO (8% w/w of chitosan) against Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae, and Bacillus subtilis. The growth-limiting effect of the films was more pronounced for S. aureus and K. pneumoniae. Due to enhanced TS and imparted antibacterial activity of the produced ZnO/chitosan bio-composite films, these materials are promising candidates for applications such as food packaging, wound dressing, and antibacterial coatings for various surfaces.
Açıklama
Anahtar Kelimeler
antibacterial activity, bio-composite film, chitosan, elongation at break, tensile strength, zinc oxide
Kaynak
JOURNAL OF POLYMER ENGINEERING
WoS Q Değeri
N/A
Scopus Q Değeri
Q3
Cilt
42
Sayı
1
