Abstract
Synthetic polymers have been extensively employed in various sectors of life. They, however, are mostly xenobiotic, toxic and persistent, thus causing certain environmental and health issues. So, the current awareness has raised the demand for eco-friendly biobased polymers. In this context, poly(hydroxybutyrate) (PHB) could be a promising candidate due to its eco-friendly and modifiable nature. The chemo-physical properties of such a biopolyester might be tailored through mediation with certain metallic nanoparticles, thus making its nanobiocomposite with improved mechanical stability. The present work aimed to prepare silver sulfide (Ag2S) nanoparticles (NPs)-mediated PHB-based conductive films and evaluate their structural and functional properties. The Ag2S NPs were prior prepared using the chemical precipitation/reduction approach and then impregnated into PHB-based nanobiocomposite films using the solution casting approach, whereas poly(lactic acid) was used as a reinforcing agent. The UV–visible spectrum of the Ag2S NPs dispersion exhibited a strong absorption peak at 260 nm. The z-average of the Ag2S NPs was recorded as 100 ± 10 nm with a polydispersity index of 0.095 and zeta potential of − 35 ± 5 mV. Fourier transform infrared analysis expressed successful mediation of Ag2S NPs in the biocomposite. The crystallinity of the nanobiocomposite specimen was calculated to be 79.23%, i.e., larger than that of the control PHB/PLA blend film having 53.69%. The prepared nanocomposite films were found electrically conductive with appropriate physicochemical, mechanical and thermal properties, and thus could find possible applications in biosensing and smart packing sectors.
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The authors acknowledge the financial support from Higher Education Commission, Islamabad, in pursuing this study.
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Raza, Z.A., Akram, H., ur Rehman, M.S. et al. Synthesis of silver sulfide nanostructures and intercalation thereof into poly(hydroxybutyrate)-based multicomponent film. Polym. Bull. 81, 4387–4406 (2024). https://doi.org/10.1007/s00289-023-04907-1
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DOI: https://doi.org/10.1007/s00289-023-04907-1