具有同时阻隔氧气和水分性能的稳健多相多层淀粉/聚合物（TPS/PBAT）薄膜。
Robust multiphase and multilayer starch/polymer (TPS/PBAT) film with simultaneous oxygen/moisture barrier properties.
机构信息
Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada.
Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada.; Institute of Polymer Research, University of Waterloo, Waterloo, ON, Canada.; Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, ON, Canada..
出版信息
J Colloid Interface Sci. 2021 Jul;593:290-303. doi: 10.1016/j.jcis.2021.03.010. Epub 2021 Mar 9.
The demands for bioplastics that provide good barrier properties against moisture and oxygen while simultaneously displaying good physical properties without compromising their biodegradability is ever-increasing. In this work, a multiphase and multilayer film assembly composed of thermoplastic starch (TPS) and its maleated counterpart (MTPS) with poly(butylene adipate-co-terephthalate) (PBAT) was constructed as a suitable barrier film with excellent mechanical properties. The bioplastic film assemblies were fabricated through reactive extrusion, compression molding, and dip-coating process. The incorporation of PBAT co-blend with TPS in the core layer enhanced the multilayer film's interfacial bond. The MTPS/PBAT film assembly provided 86.8% and 74.3% improvement in moisture barrier and oxygen barrier as compared to the baseline TPS and PBAT films, respectively. Overall, the multiphase and multilayer film assembly displayed good mechanical properties in conjuncture with excellent barrier properties indicating their potential as a biodegradable and cost effective alternative to conventional plastics used in the packaging industry.
对于能够提供良好的防潮和隔氧性能，同时保持其生物降解性而不牺牲物理性能的生物塑料的需求不断增加。在这项工作中，通过热塑性淀粉（TPS）及其马来酸化对应物（MTPS）与聚丁二酸丁二醇酯-对苯二甲酸酯（PBAT）的多相多层膜组件被构建为具有优异机械性能的合适阻隔膜。通过反应挤出、压缩成型和浸涂工艺制备了生物塑料薄膜组件。在芯层中加入 PBAT 共混物与 TPS 增强了多层膜的界面结合。与基线 TPS 和 PBAT 薄膜相比，MTPS/PBAT 薄膜组件的水汽阻隔性能提高了 86.8%，氧气阻隔性能提高了 74.3%。总的来说，多相多层膜组件具有良好的机械性能和优异的阻隔性能，表明它们有可能成为包装行业中传统塑料的可生物降解且具有成本效益的替代品。
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