Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
Carbohydr Polym. 2020 Jun 15;238:116203. doi: 10.1016/j.carbpol.2020.116203. Epub 2020 Mar 23.
Single-use plastic become a post-consumer waste and create a big problem for the society and the environment. Polysaccharides are the potential replacement of single-use plastics, however lack of mechanical strength and water durability restrict their applications. In this study, we prepared a cellulose nanofiber reinforced starch membrane, which had adequate mechanical strength and durability in water. TEMPO-oxidized cellulose nanofiber (TCNF) was blended with three different types of modified starch: hydroxypropyl starch (HPS), acetyl starch (AS) and acetyl oxidized starch (AOS), respectively. It was demonstrated that the TCNF/starch membrane exhibited reduced swelling in water and enhanced mechanical strength in wet condition compared to TCNF or starch membrane because hemiacetal bonding was formed between TCNF and starch. TCNF/HPS membrane showed the highest wet tensile modulus (7 MPa) with the minimum swelling in water. Therefore, the TCNF reinforced HPS membranes may be served as potential substitutes for petrochemical plastic packaging.
一次性塑料成为消费后的废物，给社会和环境带来了巨大的问题。多糖是一次性塑料的潜在替代品，但机械强度和耐水性的缺乏限制了它们的应用。在这项研究中，我们制备了一种纤维素纳米纤维增强的淀粉膜，它具有足够的机械强度和在水中的耐久性。TEMPO 氧化的纤维素纳米纤维（TCNF）分别与三种不同类型的改性淀粉：羟丙基淀粉（HPS）、乙酰化淀粉（AS）和乙酰化氧化淀粉（AOS）混合。结果表明，与 TCNF 或淀粉膜相比，TCNF/淀粉膜在水中的溶胀性降低，在湿态下的机械强度增强，因为 TCNF 和淀粉之间形成了半缩醛键。TCNF/HPS 膜在水中的溶胀最小，具有最高的湿拉伸模量（7 MPa）。因此，TCNF 增强的 HPS 膜可能成为石油化工塑料包装的潜在替代品。
