Abstract
Polylactic acid (PLA)/organo-montmorillonite nanocomposites were prepared by the solution casting method using chloroform as solvent. The clays were organically modified by four different modifiers, ternary amine with two alkyl (tallow) tails, primary amine containing silane with a single tail, ammonium salt with a single alkyl (tallow) tail, and ammonium salts with two alkyl (tallow) tails. The structural characterization of the nanocomposite films was performed using Raman spectroscopy and the internal structure of the nanocomposites in the nanometer range was studied using wide-angle X-ray diffraction analysis. All the nanocomposites exhibited superior improvement when compared to neat PLA. Differential scanning calorimetry (DSC) was performed to study the thermal behavior of the prepared composites. Among the used clay types, M24 was the most effective in improving the water vapor and oxygen barrier properties. Water vapor and oxygen permeability of the nanocomposite films were decreased up to 80 and 49% when using M24 clay, respectively. Surface properties of the films were investigated with dynamic contact angle measurements. The migration studies of neat PLA and nanocomposites were performed for three types of food simulants.
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Şengül, B., El-abassy, R.M.A., Materny, A. et al. Poly(lactic acid)/Organo-Montmorillonite Nanocomposites: Synthesis, Structures, Permeation Properties and Applications. Polym. Sci. Ser. A 59, 891–901 (2017). https://doi.org/10.1134/S0965545X17060098
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DOI: https://doi.org/10.1134/S0965545X17060098