Jorda-Beneyto M, Ortuño N, Devis A, Aucejo S, Puerto M, Gutiérrez-Praena D, Houtman J, Pichardo S, Maisanaba S, Jos A
a Packaging , Transport and Logistics Research Institute , C/Albert Einstein, 1, Paterna, E-46980 Valencia , Spain.
Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2014;31(3):354-63. doi: 10.1080/19440049.2013.874045. Epub 2014 Feb 19.
Two organo-modified clays for food contact applications were developed to produce hydrophobically modified montmorillonite and hence to obtain better compatibility between the biopolymer and the filler (nanoclay). These nanofillers were characterised by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction and thermogravimetric analysis (TGA) in order to study their composition, structure and thermal stability. The fillers were used to reinforce polylactic acid (PLA) bottles, which were characterised using different techniques such as mechanical and barrier properties, morphology and thermal stability. The results were compared with conventional PLA bottles. The use of the modified clay in PLA bottles was found to lead to an improvement in mechanical and barrier properties. Finally, cytotoxicity tests were carried out with the organo-modified clays using Caco-2 and HepG2 cell lines, with uptake of neutral red as a basal cytotoxicity biomarker.
开发了两种用于食品接触应用的有机改性粘土，以制备疏水改性蒙脱石，从而提高生物聚合物与填料（纳米粘土）之间的相容性。通过傅里叶变换红外光谱（FTIR）、X射线衍射和热重分析（TGA）对这些纳米填料进行了表征，以研究其组成、结构和热稳定性。这些填料用于增强聚乳酸（PLA）瓶，并使用机械性能、阻隔性能、形态和热稳定性等不同技术对其进行表征。将结果与传统PLA瓶进行了比较。发现改性粘土用于PLA瓶可提高机械性能和阻隔性能。最后，使用Caco-2和HepG2细胞系对有机改性粘土进行了细胞毒性测试，以中性红摄取作为基础细胞毒性生物标志物。
