School of Engineering, Thornbrough Building, University of Guelph, Guelph N1G 2W1, Ontario, Canada; Bioproducts Discovery and Development Centre, Department of Plant Agriculture, Crop Science Building, University of Guelph, Guelph N1G 2W1, Ontario, Canada.
School of Engineering, Thornbrough Building, University of Guelph, Guelph N1G 2W1, Ontario, Canada; Bioproducts Discovery and Development Centre, Department of Plant Agriculture, Crop Science Building, University of Guelph, Guelph N1G 2W1, Ontario, Canada.
Int J Biol Macromol. 2023 Dec 31;253(Pt 1):126231. doi: 10.1016/j.ijbiomac.2023.126231. Epub 2023 Aug 9.
Being less dependent on non-renewable resources as well as protecting the environment from waste streams have become two critical primers for a global movement toward replacing conventional plastics with renewable and biodegradable polymers. Despite all these efforts, only a few biodegradable polymers have paved their way successfully into the market. Polylactic acid is one of these biodegradable polymers that has been investigated thoroughly by researchers as well as manufactured on a large industrial scale. It is synthesized from lactic acid obtained mainly from the biological fermentation of carbohydrates, which makes this material a renewable polymer. Besides its renewability, it benefits from some attractive mechanical performances including high strength and stiffness, though brittleness is a major drawback of this biopolymer. Accordingly, the development of blends and biocomposites based on polylactic acid with highly flexible biodegradable polymers, specifically poly(butylene adipate co terephthalate) has been the objective of many investigations recently. This paper focuses on the blends and biocomposites based on these two biopolymers, specifically their mechanical, rheological, and biodegradation, the main characteristics that are crucial for being considered as a biodegradable substitution for conventional non-biodegradable polymers.
减少对不可再生资源的依赖，以及防止废物对环境造成污染，这两点已成为推动用可再生和可生物降解聚合物替代传统塑料的全球性运动的两个关键原则。尽管做出了这些努力，但只有少数几种可生物降解聚合物成功地进入了市场。聚乳酸就是其中一种可生物降解聚合物，研究人员对其进行了深入研究，并在大规模的工业生产中进行了制造。它是由乳酸合成的，而乳酸主要是从碳水化合物的生物发酵中获得的，这使得这种材料成为一种可再生聚合物。除了可再生性之外，它还具有一些有吸引力的机械性能，包括高强度和刚性，但脆性是这种生物聚合物的一个主要缺点。因此，最近的许多研究都致力于开发基于聚乳酸和高度灵活的可生物降解聚合物（特别是聚（丁二酸丁二醇酯-对苯二甲酸酯））的共混物和生物复合材料。本文重点介绍了基于这两种生物聚合物的共混物和生物复合材料，特别是它们的机械性能、流变性能和生物降解性能，这些特性是将其作为传统不可生物降解聚合物的可生物降解替代品的关键考虑因素。
