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Substituent Optimization of (1 → 2)-Glucopyranan for Tough, Strong, and Highly Stretchable Film with Dynamic Interchain Interactions
ACS Macro Letters ( IF 5.1 ) Pub Date : 2020-05-01 , DOI: 10.1021/acsmacrolett.0c00266 Abu Bin Ihsan 1 , Yasuhito Koyama 1
ACS Macro Letters ( IF 5.1 ) Pub Date : 2020-05-01 , DOI: 10.1021/acsmacrolett.0c00266 Abu Bin Ihsan 1 , Yasuhito Koyama 1
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Polysaccharide is a naturally abundant material, which is regarded as an indispensable scaffold for a structural material. The properties of polysaccharides are dependent not only on the structure of repeating sugar unit but also the glycosidic position between the repeating units. Herein, we report the development of polysaccharide-based self-standing film consisting of naturally occurring (1 → 2)-glucopyranan skeleton. The self-standing film of (1 → 2)-glucopyranan derivative with hexyl carbamate groups Uret-Glcp(1,2) is found to be highly stretchable and tough, which exhibits maximum stress of σmax = 1.4 MPa, fracture strain of ε ∼ 800%, and the work of extension at fracture Wext ∼ 4 MJ m–3. It is indicated that the interchain hydrogen bonds in Uret-Glcp(1,2) film would serve as energy dissipative bonds for strengthening the film, where the application of mechanical stress to Uret-Glcp(1,2) film induces not only the rapture of physical interchain interactions, but also the formation of intrachain hydrogen bonds along the stretching direction. The effects of substituent and glycosidic position of polysaccharide on the properties are discussed in detail.
中文翻译：
(1 → 2)-葡聚糖的取代基优化，用于具有动态链间相互作用的坚韧、强韧和高拉伸薄膜
多糖是一种天然丰富的材料，被认为是结构材料不可缺少的支架。多糖的性质不仅取决于重复糖单元的结构，还取决于重复单元之间的糖苷位置。在此，我们报告了由天然存在的 (1 → 2)-吡喃葡萄糖骨架组成的基于多糖的自立薄膜的开发。发现具有氨基甲酸己酯基团Uret-Glcp(1,2)的 (1 → 2)-吡喃葡萄糖衍生物自支撑薄膜具有高拉伸性和韧性，其最大应力 σ max = 1.4 MPa，断裂应变 ε ∼ 800%, 断裂处的延伸功W ext ∼ 4 MJ m –3. 表明Uret-Glcp(1,2)薄膜中的链间氢键可作为增强薄膜的能量耗散键，其中对Uret-Glcp(1,2)薄膜施加机械应力不仅会引起断裂。物理链间相互作用，也沿拉伸方向形成链内氢键。详细讨论了多糖的取代基和糖苷位置对其性质的影响。
更新日期：2020-05-01
中文翻译：
(1 → 2)-葡聚糖的取代基优化，用于具有动态链间相互作用的坚韧、强韧和高拉伸薄膜
多糖是一种天然丰富的材料，被认为是结构材料不可缺少的支架。多糖的性质不仅取决于重复糖单元的结构，还取决于重复单元之间的糖苷位置。在此，我们报告了由天然存在的 (1 → 2)-吡喃葡萄糖骨架组成的基于多糖的自立薄膜的开发。发现具有氨基甲酸己酯基团Uret-Glcp(1,2)的 (1 → 2)-吡喃葡萄糖衍生物自支撑薄膜具有高拉伸性和韧性，其最大应力 σ max = 1.4 MPa，断裂应变 ε ∼ 800%, 断裂处的延伸功W ext ∼ 4 MJ m –3. 表明Uret-Glcp(1,2)薄膜中的链间氢键可作为增强薄膜的能量耗散键，其中对Uret-Glcp(1,2)薄膜施加机械应力不仅会引起断裂。物理链间相互作用，也沿拉伸方向形成链内氢键。详细讨论了多糖的取代基和糖苷位置对其性质的影响。
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