Islam Hasanul Banna Muhammad Zukaul, Susan Md Abu Bin Hasan, Imran Abu Bin
Department of Chemistry, Faculty of Engineering, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh.
Department of Chemistry, Faculty of Science, University of Dhaka, Dhaka 1000, Bangladesh.
ACS Omega. 2020 Jul 7;5(28):17543-17552. doi: 10.1021/acsomega.0c02012. eCollection 2020 Jul 21.
Biodegradable polymeric films have great potential as alternatives to synthetic polymeric films to reduce environmental pollution. Plasticizing agents and nanofillers can improve the mechanical properties of polymer-based composites, resulting in materials with better flexibility and extensibility. Starch, a natural polymer, can be produced at low cost and on a large scale from abundant and inexpensive agricultural resources like potatoes. The aim of the present work was to fabricate mechanically strong and thermally stable potato starch films reinforced with different types of plasticizers and nanoclays at different concentrations. Different types of plasticizers such as water, glycerin, ethylene glycol, sorbitol, and formamide and three types of clays such as montmorillonite, hectorite, and kaolinite at various concentrations were used to prepare potato starch-based nanocomposite films. The films were prepared using a very simple solution casting process. The mechanical properties and thermal stabilities of nanocomposite films significantly improved using montmorillonite, hectorite, and kaolinite clays. The water uptake percentage of the fabricated films decreased with addition of plasticizers and further decreased with addition of different types of clays. The structural and morphological changes of the fabricated films in the presence of plasticizers and nanoclays were correlated in detail with their mechanical properties, crystallinity, biodegradability, thermal stability, and water absorption capacities.
可生物降解的聚合物薄膜作为合成聚合物薄膜的替代品，在减少环境污染方面具有巨大潜力。增塑剂和纳米填料可以改善聚合物基复合材料的机械性能，从而得到具有更好柔韧性和延展性的材料。淀粉是一种天然聚合物，可以从土豆等丰富且廉价的农业资源中低成本大规模生产。本工作的目的是制备用不同类型、不同浓度的增塑剂和纳米粘土增强的机械性能强且热稳定的土豆淀粉薄膜。使用不同类型的增塑剂如水、甘油、乙二醇、山梨醇和甲酰胺，以及不同浓度的三种粘土如蒙脱石、锂皂石和高岭土来制备基于土豆淀粉的纳米复合薄膜。这些薄膜采用非常简单的溶液浇铸工艺制备。使用蒙脱石、锂皂石和高岭土粘土后，纳米复合薄膜的机械性能和热稳定性显著提高。所制备薄膜的吸水率随着增塑剂的添加而降低，随着不同类型粘土的添加进一步降低。详细研究了所制备薄膜在增塑剂和纳米粘土存在下的结构和形态变化与其机械性能、结晶度、生物降解性、热稳定性和吸水能力之间的关系。
