1. Studies on Properties of Rice Straw/Polymer Nanocomposites Based on Polycaprolactone and Fe3O4 Nanoparticles and Evaluation of Antibacterial Activity.
- Author
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Khandanlou, Roshanak, Ahmad, Mansor B., Shameli, Kamyar, Saki, Elnaz, and Kalantari, Katayoon
- Subjects
RICE straw ,NANOCOMPOSITE materials ,POLYCAPROLACTONE ,IRON oxide nanoparticles ,ANTIBACTERIAL agents - Abstract
Modified rice straw/Fe
3 O4 /polycaprolactone nanocomposites (ORS/Fe3 O4 / PCL-NCs) have been prepared for the first time using a solution casting method. The RS/Fe3 O4 -NCs were modified with octadecylamine (ODA) as an organic modifier. The prepared NCs were characterized by using X-ray powder diffraction (XRD), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), Thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FT-IR). The XRD results showed that as the intensity of the peaks decreased with the increase of ORS/Fe3 O4 -NCs content in comparison with PCL peaks, the Fe3 O4 -NPs peaks increased from 1.0 to 60.0 wt. %. The TEM and SEM results showed a good dispersion of ORS/Fe3 O4 -NCs in the PCL matrix and the spherical shape of the NPs. The TGA analysis indicated thermal stability of ORS/Fe3 O4 -NCs increased after incorporation with PCL but the thermal stability of ORS/Fe3 O4 /PCL-NCs decreased with the increase of ORS/Fe3 O4 -NCs content. Tensile strength was improved with the addition of 5.0 wt. % of ORS/Fe3 O4 -NCs. The antibacterial activities of the ORS/Fe3Ü4/PCL-NC films were examined against Gram-negative bacteria (Escherichia coli) and Gram-positive bacteria (Staphylococcus aureus) by diffusion method using nutrient agar. The results indicated that ORS/Fe3 O4 /PCL-NC films possessed a strong antibacterial activity with the increase in the percentage of ORS/Fe3 O4 -NCs in the PCL. [ABSTRACT FROM AUTHOR]- Published
- 2014
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