Abstract
This study presents a favorable, simple, safe, fast, and facile approach for the synthesis of potentially ecofriendly biodegradable polymer nanocomposites (NC)s with amino acid modified-montmorillonite (AA-MMT). At first, positively charged chiral amino acid l-leucine was incorporated into the unmodified Cloisite-Na+ montmorillonite (MMT) for organo-modification of MMT by cation-exchange method. Fourier transform infrared spectroscopy (FT-IR) showed the presence of the organic segment in the modified clay product. Then the dispersion characteristics of AA-MMT in the aforementioned NCs were determined based on polyvinylpyrrolidone (PVP). The obtained NCs were characterized by different analytical tools including FT-IR, powder X-ray diffraction (XRD), thermogravimetric analysis (TGA), transmission electron microscopy (TEM), and field emission scanning electron microscopy (FE-SEM). The XRD patterns, FE-SEM, and TEM results proposed that the AA-MMT platelets were intercalated with PVP during the process. As evidenced by TGA analysis of the obtained NCs, heat stability was slightly improved as compared with the pure PVP.
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Acknowledgments
The authors thank the Research Affairs Division of Isfahan University of Technology (IUT), Isfahan for partial financial support. Further financial support from Iran nanotechnology Initiative Council (INIC), National Elite Foundation (NEF) and Center of Excellence in Sensors and Green Chemistry Research (IUT) is gratefully acknowledged.
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Mallakpour, S., Khani, M. Characterization of nanocomposite laminates fabricated from aqueous dispersion of polyvinylpyrrolidone and l-leucine amino acid modified-montmorillonite. Polym. Bull. 73, 2677–2688 (2016). https://doi.org/10.1007/s00289-016-1614-6
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DOI: https://doi.org/10.1007/s00289-016-1614-6