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首页> 外文期刊>Journal of Applied Polymer Science >Structure and properties of films fabricated from chitin solution by coagulating with heating
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Structure and properties of films fabricated from chitin solution by coagulating with heating

机译：由几丁质溶液加热凝结制成的薄膜的结构和性能

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摘要

In the present work, chitin films were fabricated from chitin solution dissolved in 8 wt % NaOH/4 wt % urea aqueous systems at low temperature by coagulating with heating without using any coagulant. The formation of the chitin films was confirmed to be an entirely physical process, namely chitin inclusion complex associated with NaOH, urea and water in the solvent was broken by heating, leading to the aggregation of the chitin chains through the hydrogen bonding. A schematic model was proposed to describe the regeneration mechanism of the chitin, indicating the physical crosslinking and entanglement of the chitin chains to form the films. Glycerol was used as plasticizer, and with an increase of the glycerol content, the elongation at break (E_ b) of chitin films increased rapidly from 7.8 to 83.1%, whereas the tensile strength (σ_b) decreased from 89.3 to 51.7 MPa. This work provided a "green" pathway for the researches and developments of chitin materials.
机译：在本工作中，通过在不使用任何凝结剂的情况下加热凝结，在低温下由溶于8 wt％NaOH / 4 wt％尿素水体系的几丁质溶液制备几丁质膜。确认几丁质膜的形成是完全物理的过程，即通过加热破坏与溶剂中的NaOH，尿素和水缔合的几丁质包合配合物，从而通过氢键导致几丁质链的聚集。提出了示意性模型来描述几丁质的再生机理，表明几丁质链的物理交联和缠结以形成膜。甘油用作增塑剂，随着甘油含量的增加，几丁质薄膜的断裂伸长率（E_b）从7.8％迅速增加至83.1％，而抗张强度（σ_b）从89.3 MPa降低至51.7 MPa。这项工作为甲壳质材料的研究和开发提供了“绿色”途径。

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