Hydrophilicity, Solubility and Optical Properties in Composite Films of Gelatin and Bentonite Clay in its Natural Form or Modified

Abstract:

Bentonite clay was initially treated with a quaternary ammonium salt to increase its hydrophobicity, and then was dispersed in a gelatin matrix to serve as barrier to water vapor. The clays were characterized by IR spectroscopy in the infrared (FTIR), and X-ray diffraction (XRD), before and after ion exchange. The ion exchange held in the clay provokes on gelatin film a reduction of 65% in the water vapor permeability (WVP); a decrease in solubility of 55%; an increase of 35º in drop contact angle of water on the surface of the film; and 30% of raise in opacity.

• Periodical: Materials Science Forum (Volume 912)
• Pages: 136-140
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.912.136
• Online since: January 2018
• Authors: Mayra Keroly Sales Monteiro*, Francisco Klebson Gomes dos Santos, Ricardo Henrique de Lima Leite, Edna Maria Mendes Aroucha, Jussier Oliveira Vitoriano, Victor Rafael Leal Oliveira
• Keywords: Gelatin, Ion Exchange, Montmorillonite

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