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.
Highlights
Polymer-metal based material with unique 3D structure is an attractive substrate for the development of biomedical applications
XRD analysis confirmed the crystalline character of Ag-AgCl NPs in the colloid sample and the XRD pattern was recorded in the 2θ 20–80° range (Fig. 1a)
Ag speciation in the aqueous environment depends on the Cl-Ag region; where soluble AgCl2, (AgCl3)2− and (AgCl4)3− can be formed from high Cl-Ag ratios, and AgCl can precipitate at lower Cl-Ag ratios[23]
Summary
Polymer-metal based material with unique 3D structure is an attractive substrate for the development of biomedical applications. 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. The electrospinning is an technique using a high voltage electrostatic field to charge the surface of liquid solutions This is especially important for these polymers, where the technology is divided into ‘capillary’ and ‘needleless’ categories, dependent on the extracted fibre’s location[11,12]. Capillary electrospinning is limited by the amount of injected polymer, the needleless technique has high fiber production from the free surface of the polymer via self-organization[13]
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