Cellulose nanofiber reinforced starch membrane with high mechanical strength and durability in water.,Carbohydrate Polymers

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Cellulose nanofiber reinforced starch membrane with high mechanical strength and durability in water.
Carbohydrate Polymers ( IF 10.7 ) Pub Date : 2020-03-23 , DOI: 10.1016/j.carbpol.2020.116203
Raghav Soni ₁ , Taka-Aki Asoh ₁ , Hiroshi Uyama ₁

Affiliation

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.

中文翻译：

纤维素纳米纤维增强淀粉膜在水中具有较高的机械强度和耐久性。

一次性塑料成为消费后的废物，给社会和环境造成了很大的问题。多糖是一次性塑料的潜在替代品，但是缺乏机械强度和耐水性限制了它们的应用。在这项研究中，我们制备了纤维素纳米纤维增强的淀粉膜，该膜具有足够的机械强度和在水中的耐久性。将TEMPO氧化的纤维素纳米纤维（TCNF）与三种不同类型的改性淀粉共混：羟丙基淀粉（HPS），乙酰基淀粉（AS）和乙酰基氧化淀粉（AOS）。事实证明，与TCNF或淀粉膜相比，TCNF /淀粉膜在水中的溶胀降低，机械强度增强，这是因为TCNF与淀粉之间形成了半缩醛键。TCNF / HPS膜的湿拉伸模量最高（7 MPa），在水中的溶胀最小。因此，TCNF增强的HPS膜可作为石化塑料包装的潜在替代品。

更新日期：2020-03-24

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