Ag-AgCl Nanoparticles Fixation on Electrospun PVA Fibres: Technological Concept and Progress

Abstract

Polymer-metal based material with unique 3D structure is an attractive substrate for the development of biomedical applications. A novel preparation of the composite from polymer fibres and silver nanoparticles has been designed through: (1) preparation of silver nanoparticles by phytosynthesis and (2) incorporation of these nanoparticles in a fibrous membrane prepared by electrospinning. The nanoparticle biosynthesis was performed in a pure environmental-friendly, easy, static, bottom-up in vitro regime using Tilia sp. leachate. TEM and XRD depict the formation, stabilisation and encapsulation of crystalline silver (14 ± 9 nm) nanoparticles (NPs) in one simple step with low tendency to aggregate. We achieved successful incorporation in the uniform electrospun 221 ± 24 nm poly(vinylalcohol) fibres, and this confirms the possibility of its use in the biomedical field. Both SEM with EDX and TEM analysis determined fibre uniformity with the presence of silver NPs, and ICP-AES confirmed the relatively similar metal concentration throughout the triplicate measurement of fibre structures on the 2 × 2 cm area in the following manner: 0.303 ± 0.018 wt. %, 0.282 ± 0.017 wt. %, and 0.281 ± 0.017 wt. %. Our hypothesis is based on previously verified preparation of active silver NPs and the easily prepared PVA electrospun fibres which act as a water soluble matrix. The simple methodology of incorporating biosynthetically prepared NPs in the PVA fibers highlights the effectiveness of this material, with simple release from water-soluble PVA and final activation of the prepared NPs.

Synthesis of Biogenic Silver Nanoparticles (AgCl-NPs) Using a Pulicaria vulgaris Gaertn. Aerial Part Extract and Their Application as Antibacterial, Antifungal and Antioxidant Agents

“…This is likely attributable to the completion of the synthesis process, and the formation of biogenic AgCl-NPs [11]. It was previously reported that P. vulgaris contains alkaloids, tannins, flavonoids, and phenolic compounds [29] that could be responsible for the bioreduction of Ag(I) ions into AgCl-NPs as well as their capping in the solution [30]. The green synthesis mechanism of AgCl-NPs is not clear yet, but it seems that secondary metabolites of P. vulgaris played an important role in their formation and stabilization.…”

Characterizing optimum electrospinning conditions for graft urethanized Poly(Vinyl Alcohol)(U-PVA)

“…Vilamova Z. et al. have also observed this behavior [ 12 ]. Generally, increasing the applied voltage leads to a stable Taylor cone, and the columbic repulsive forces within the spinning jet force the viscoelastic solution to extend.…”

“…To add an antimicrobial agent to PVA, Vilamova Z. et al. have prepared a composite from silver nanoparticles encapsulated inside electrospun PVA nanofibers [ 12 ]. For this study, we aimed to find the best electrospinning parameters (including capillary–collector distance, voltage, and flow rate) for the newly prepared material graft urethanized poly(vinyl alcohol) (U-PVA) and comparing the results of fiber morphology, wettability and drug release rates between pure PVA and graft U-PVA specimens for pharmaceutical applications.…”

The Effects of Nature-Inspired Synthesis on Silver Nanoparticle Generation

“…The crystalline nature of the prepared Ag-AgCl NPs was confirmed by selected-area electron diffraction (SAED) patterns, and the crystal twinning typical in silver crystals was also apparent. In our previous study, 38 we used L1 to synthesize Ag NPs for p-nitrophenol decomposition. The Ag-AgCl NPs' core diameter was 14 ± 9 nm, and this correlates with these study results.…”