A One-Pot Synthesis and Characterization of Antibacterial Silver Nanoparticle–Cellulose Film

Abstract

Using N,N-dimethylacetamide (DMAc) as a reducing agent in the presence of PVP-K30, the stable silver nanoparticles (Ag-NPs) solution was prepared by a convenient method for the in situ reduction of silver nitrate. The cellulose–Ag-NPs composite film (CANF) was cast in the same container using lithium chloride (LiCl) giving the Ag-NPs-PVP/DMAc solution cellulose solubility as well as γ-mercaptopropyltrimethoxysilane (MPTS) to couple Ag-NPs and cellulose. The results showed that the Ag-NPs were uniformly dispersed in solution, and the solution had strong antibacterial activities. It was found that the one-pot synthesis allowed the growth of and cross-linking with cellulose processes of Ag-NPs conducted simultaneously. Approximately 61% of Ag-NPs was successfully loaded in CANF, and Ag-NPs were uniformly dispersed in the surface and internal of the composite film. The composite film exhibited good tensile properties (tensile strength could reach up to 86.4 MPa), transparency (light transmittance exceeds 70%), thermal stability, and remarkable antibacterial activities. The sterilization effect of CANF0.04 against Staphylococcus aureus and Escherichia coli exceed 99.9%. Due to low residual LiCl/DMAc and low diffusion of Ag-NPs, the composite film may have potential for applications in food packaging and bacterial barrier.

Carbon Nanotubes for Improved Performances of Endodontic Sealer

“…As presented in Figure 1 , neat CNTs do not present any specific vibrational features, while AgNPs shows one single absorption peak at 572 cm −1 , characteristic for Ag-O stretching vibration [ 30 , 31 ]. Chlorhexidine gluconate presents a characteristic, intensive peak at 1590 cm −1 , accompanied by less intense satellites at 1650 and 1550 cm −1 , which can be attributed to the C=C stretching of the aromatic moiety of CHX.…”

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One-pot synthesis of cellulose / silver nanoparticle fibers and their antibacterial application

“…Pure regenerated cellulose fibers had a tensile strength of 289.5 MPa and an elongation at break of 21.3%, while the mechanical properties of the R1 fibers were slightly greater, at 304.3 MPa and 22.1%, respectively. The good mechanical properties of the R1 fibers can be explained by the uniform dispersion of the Ag NPs in the cellulose and the good interfacial interaction between them (Chen et al 2020). The mechanical properties of the R2 and R3 fibers were slightly lower.…”

Polysaccharide-Based Nanocomposites for Food Packaging Applications

“…The films were proposed for food packaging applications. In an analogous study, bacterial cellulose/silver nanoparticle composites were prepared for food packaging applications [ 117 ]. The nanocomposite films provided better protection against microbial spoilage as compared to the silver nanoparticle colloidal dispersion.…”