Water soluble nanocomposite films based on poly (vinyl alcohol) and chemically modified montmorillonites.

TERESA PIQUÉ; CLAUDIO JAVIER PÉREZ; VERA ALVAREZ; ANALÍA VÁZQUEZ

JOURNAL OF COMPOSITE MATERIALS

SAGE PUBLICATIONS LTD

Lugar: London; Año: 2014 vol. 48 p. 545 - 553

0021-9983

Different montmorillonites were added to poly(vinyl alcohol) in order to improve their properties. The used montmorillonite?s were: Cloisite Naþ (Na), Nanofil (NF), and Cloisite 30B (30B). Poly(vinyl alcohol) montmorillonite films,obtained by casting, were characterized by means of Fourier transform infrared spectroscopy, differential scanning calorimetry, thermogravimetric analysis, X-ray diffraction pattern, transmission electron microscopy, water absorption,contact angle, and mechanical properties. Sodium and organically modified montmorillonites were used. The montmor-illonite basal peak shifted to a lower angle for composites, with sodium montmorillonites, and the films were exfoliated? intercalated nanocomposites. Composites with organically modified montmorillonites presented a micro-morphology and the lowest water absorption. The best mechanical properties were obtained for the composite with sodium montmorillonites.