1. Novel strategies for the preparation of nano-silver pectin sponge composite and its antibacterial properties.
- Author
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Zhao, Zhi-yuan, Li, Pei-jun, Cao, Xing-ye, Xie, Run-sheng, and Li, Hai-yun
- Subjects
PECTINS ,CHEMICAL properties ,SILVER nanoparticles ,WATER levels ,SILVER ions ,CYTOTOXINS - Abstract
Biodegradable sponges are currently attracting significant attention; however, the development of safe materials with high levels of antimicrobial activity remains a major challenge. Doping with silver nanoparticles (AgNPs) can effectively solve this problem. In this study, pectin sponges (PE-S) and nano-silver pectin sponges (PE-S/Ag) were synthesized in situ by using the freeze-drying method. The prepared sponge samples were then characterized with various tools. UV‒Vis spectroscopy was used to investigate the in situ synthesis of the AgNPs, FT-IR spectroscopy and XPS were used to investigate changes in the functional groups of the sponge samples, and SEM images were used to confirm the homogeneous distribution of AgNPs in the PE-S/Ag sponge. Our results suggested that the physical and chemical properties of the PE-S/Ag sponges were better than those of the PE-S sponges. The water absorption levels of the PE-S/Ag and PE-S sponges were three times and twice as high as that of gauze, respectively. Antibacterial tests showed that the minimum inhibitory concentrations of the PE-S/Ag sponge were 42 and 83 µg/mL against Escherichia coli and Staphylococcus aureus, respectively. Cytotoxicity and coagulation assays showed that the two sponge samples were nontoxic to cells and had good coagulation effects. The silver ion (Ag
+ ) release assay was used to analyse the pattern of Ag+ release from the PE-S/Ag sponges. [ABSTRACT FROM AUTHOR]- Published
- 2023
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