Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, 117576, Singapore; Singapore Institute of Manufacturing Technology, Agency for Science, Technology and Research (A*STAR), 73 Nanyang Drive, 637662, Singapore.
Singapore Institute of Manufacturing Technology, Agency for Science, Technology and Research (A*STAR), 73 Nanyang Drive, 637662, Singapore.
Int J Biol Macromol. 2018 Apr 1;109:99-113. doi: 10.1016/j.ijbiomac.2017.12.048. Epub 2017 Dec 14.
Polylactic acid (PLA) and Starch are both bio-based biodegradable polymers that have properties that are complementary to each other. PLA/starch blend exploits the good mechanical property of PLA and the low cost of Starch. However, PLA/Starch blend is intrinsically brittle. This paper reviews the current state of arts in toughening of PLA/Starch blend, which are categorized as: Additive Plasticization, Mixture Softening, Elastomer Toughening and Interphase Compatibilization. These strategies are not mutually exclusive and can be applied jointly in a single blend, opening up a wide range of toughening techniques that can be employed in PLA/Starch blend. Even though significant progress has been made in this area, there is still much room for research, in order to achieve easy to process, fully bio-based and completely biodegradable PLA/Starch blends that have mechanical properties suitable for a wide range of applications.
聚乳酸（PLA）和淀粉都是基于生物的可生物降解聚合物，它们具有互补的特性。PLA/淀粉共混物利用了 PLA 的良好机械性能和淀粉的低成本。然而，PLA/淀粉共混物本质上是脆性的。本文综述了 PLA/淀粉共混物增韧的最新研究进展，主要包括：添加剂增塑、混合物软化、弹性体增韧和界面相容化。这些策略并不相互排斥，可以在单个共混物中联合应用，为 PLA/淀粉共混物提供了广泛的增韧技术选择。尽管在这一领域已经取得了显著的进展，但仍有很大的研究空间，以实现易于加工、完全基于生物且完全可生物降解的 PLA/淀粉共混物，使其具有适用于广泛应用的机械性能。
