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Effect of gamma ray on magnetic bio-nanocomposite

Asadi, S ; Sharif University of Technology | 2016

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  1. Type of Document: Article
  2. DOI: 10.1016/j.matchemphys.2015.12.020
  3. Publisher: Elsevier Ltd , 2016
  4. Abstract:
  5. Magnetic polyvinyl alcohol (M-PVA) films were prepared via solution casting filled with surface modified superparamagnetic nanoparticles (M-NPs). The M-NPs were coated with citric acid during synthesis. The chemical interaction between the citric acid and M-NPs was confirmed by Fourier transform infrared spectroscopy (FTIR). The average hydrodynamic diameter of M-NPs was 19.7 nm measured by dynamic light scattering DLS and appeared almost spherical in scanning electron microscopy (SEM). The M-NPs were uniformly dispersed in polyvinyl alcohol (PVA) matrix and showed high optical transparency with good mechanical properties. M-PVA hydrogels were synthesized using gamma irradiation. The characteristic XRD peak of PVA at 19.4° was split after irradiation indicating formation of different crystallite sizes. The M-PVA hydrogel showed higher saturation magnetization compared to un-irradiated M-PVA. Also the presence of M-NPs enhanced the crosslinking of PVA by irradiation
  6. Keywords:
  7. Irradiation effects ; Biomaterials ; Citric acid ; Composite materials ; Crosslinking ; Dynamic light scattering ; Fourier transform infrared spectroscopy ; Hydrogels ; Irradiation ; Light scattering ; Magnetic properties ; Magnetism ; Nanomagnetics ; Polyvinyl alcohols ; Saturation magnetization ; Scanning electron microscopy ; Bio-nanocomposite ; Chemical interactions ; Gamma irradiation ; Hydrodynamic diameter ; Irradiation effect ; Optical transparency ; Poly (vinyl alcohol) (PVA) ; Superparamagnetic nanoparticles ; Gamma rays
  8. Source: Materials Chemistry and Physics ; Volume 170 , 2016 , Pages 71-76 ; 02540584 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0254058415304958?via%3Dihub