Radfar Ramin, Hosseini Hedayat, Farhodi Mehdi, Ghasemi Ismail, Średnicka-Tober Dominika, Shamloo Ehsan, Khaneghah Amin Mousavi
Department of Food Science and Technology, Faculty of Nutrition Sciences, Food Science and Technology/National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Department of Agricultural and Food Policy, Agricultural Planning and Economics Researches Institute (APERI), Tehran, Iran.
Department of Food Science and Technology, Faculty of Nutrition Sciences, Food Science and Technology/National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Food Safety Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Int J Biol Macromol. 2020 May 4. doi: 10.1016/j.ijbiomac.2020.04.139.
A novel active LDPE/TPS nanocomposite films containing date palm seed extracts (Kabkab variety) were developed using D-optimal mixture design. 20 different blends of components including LDPE, TPS, Cloisite 20A, PE-g-MA, EDTA and date palm seed extracts in different proportions were prepared. Using trace and counter plots the effects of each component on the mechanical and antibacterial properties of the composites were studied. The results showed that the films containing a mixture of date seed extract and EDTA had notable antibacterial activity against E. coli and S. aureus; however, these components weakened the mechanical properties of the prepared films. At the same time Cloisite 20A nanoparticles strengthened the films mechanical properties. The optimized formulation for the overall best antibacterial and mechanical properties was 67.5 wt% for LDPE, 4.1 wt% for date seed extract, 2.8 wt% for Cloisite 20A and 2.5 wt% for EDTA. The studied properties of the manufactured film samples were close to the values predicted by the model.
采用D - 最优混合设计开发了一种新型的含有枣椰树种子提取物（Kabkab品种）的活性低密度聚乙烯/热塑性淀粉纳米复合薄膜。制备了20种不同比例的由低密度聚乙烯、热塑性淀粉、Cloisite 20A、聚乙烯 - 马来酸酐接枝物、乙二胺四乙酸和枣椰树种子提取物组成的混合物。利用等高线图和等高线交互图研究了各组分对复合材料力学性能和抗菌性能的影响。结果表明，含有枣椰树种子提取物和乙二胺四乙酸混合物的薄膜对大肠杆菌和金黄色葡萄球菌具有显著的抗菌活性；然而，这些组分削弱了所制备薄膜的力学性能。同时，Cloisite 20A纳米颗粒增强了薄膜的力学性能。综合最佳抗菌和力学性能的优化配方为：低密度聚乙烯67.5 wt%、枣椰树种子提取物4.1 wt%、Cloisite 20A 2.8 wt%、乙二胺四乙酸2.5 wt%。所制备薄膜样品的研究性能接近模型预测值。
