Analytical Chemistry, Nutrition & Food Sciences Department, University of Alicante , 03080 Alicante, Spain.
J Agric Food Chem. 2014 Mar 12;62(10):2244-52. doi: 10.1021/jf405111a. Epub 2014 Mar 3.
Antioxidant nanobiocomposites based on poly(ε-caprolactone) (PCL) were prepared by incorporating hydroxytyrosol (HT) and a commercial montmorillonite, Cloisite30B (C30B), at different concentrations. A full structural, thermal, mechanical, and functional characterization of the developed nanobiocomposites was carried out. The presence of the nanoclay and HT increased PCL crystallinity, whereas some decrease in thermal stability was observed. TEM analyses corroborated the good dispersion of C30B into the PCL macromolecular structure as already asserted by XRD tests, because no large aggregates were observed. A reduction in oxygen permeability and an increase in elastic modulus were obtained for films containing the nanoclay. Finally, the presence of the nanoclay produced a decrease in the HT release from films due to some interaction between HT and C30B. Results proved that these nanobiocomposites can be an interesting and environmentally friendly alternative for active food packaging applications with antioxidant performance.
基于聚己内酯（PCL）的抗氧化纳米生物复合材料通过将羟基酪醇（HT）和商业蒙脱石，Cloisite30B（C30B），以不同浓度掺入而制备。对所开发的纳米生物复合材料进行了全面的结构、热学、力学和功能特性分析。纳米粘土和 HT 的存在增加了 PCL 的结晶度，而热稳定性则略有下降。TEM 分析证实了 C30B 已经通过 XRD 测试很好地分散在 PCL 大分子结构中，因为没有观察到大的团聚体。含有纳米粘土的薄膜的氧气透过率降低，弹性模量增加。最后，由于 HT 和 C30B 之间的某些相互作用，纳米粘土的存在导致薄膜中 HT 的释放减少。结果证明，这些纳米生物复合材料可以作为具有抗氧化性能的活性食品包装应用的一种有趣且环保的替代方案。
