Bio-modification of cloisite Na~+ with chiral L-leucine and preparation of new poly(Vinyl Alcohol)/organo-nanoclay bionanocomposite films

摘要

The main purpose of this study was to prepare poly(vinyl alcohol)/organo-modified Cloisite Na~+ bionanocomposites with various amounts of organo-nanoclay. At first the pristine sodium montmorillonite (Cloisite Na~+) was modified by protonated form of enantiomeric pure L-leucine amino acid as a cationic surfactant. In the next, the novel poly(vinyl alcohol)/organo-modified Cloisite Na~+ bionanocomposite films were prepared with different wt% of the nanoclay using ultrasonic energy following by solution film casting method. The obtained bionanocomposite films were characterized by X-ray diffraction, fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, and UV-visible transmission spectra.