Characterization of nanocomposite laminates fabricated from aqueous dispersion of polyvinylpyrrolidone and l-leucine amino acid modified-montmorillonite

• Published in: Polymer bulletin (Berlin, Germany) Vol. 73; no. 10; pp. 2677 - 2688
• Main Authors: Mallakpour, Shadpour, Khani, Marziyeh
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.10.2016; Springer Nature B.V
• Subjects: Amino acids; Carbon; Cation exchanging; Characterization and Evaluation of Materials; Chemical synthesis; Chemistry; Chemistry and Materials Science; Complex Fluids and Microfluidics; Dispersion; Emission analysis; Field emission microscopy; Fourier transforms; Infrared spectroscopy; Laminates; Leucine; Montmorillonite; Nanocomposites; Organic Chemistry; Original Paper; Physical Chemistry; Polymer Sciences; Polymers; Polyvinylpyrrolidone; R&D; Research & development; Scanning electron microscopy; Soft and Granular Matter; Spectrum analysis; Stability analysis; Surfactants; Thermogravimetric analysis; Transmission electron microscopy; X ray powder diffraction; X-ray diffraction; Japan; Germany; Amino acid modified-montmorillonite; Polymer–clay nanocomposites; Morphology study; Polyvinylpyrrolidone; Solution intercalation process
• ISSN: 0170-0839; 1436-2449
• DOI: 10.1007/s00289-016-1614-6

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.