Supermolecular structure of cellulose/amylose blends prepared from aqueous NaOH solutions and effects of amylose on structural formation of cellulose from its solution |
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Authors: | Miyamoto Hitomi Ago Mariko Yamane Chihiro Seguchi Masaharu Ueda Kazuyoshi Okajima Kunihiko |
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Affiliation: | aFaculty of Home Economics, Kobe Women’s University, 2-1 Aoyama, Higashisuma Suma-ku, Kobe 654-8585, Japan;bFaculty of Engineering, Tokushima Bunri University, 1314 Shido, Sanuki 769-2193, Japan;cGraduate School of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan |
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Abstract: | We previously proposed a mechanism for the structural formation of cellulose from its solution using a molecular dynamics (MD) simulation and suggested that the initial structure from its solution plays a critical role in determining its final structure. Structural changes in the van der Waals-associated cellulose molecular sheet as the initial structure were examined by MD simulation; the molecular sheet was found to be disordered due to maltohexaoses as an amylose model in terms of the hydrogen bonding system of cellulose. The structure and properties of cellulose/amylose blends prepared from an aqueous NaOH solution were examined experimentally by wide-angle X-ray diffraction and dynamic viscoelasticity measurements. The crystallinity of cellulose in the cellulose/amylose blend films was lower than that of cellulose film. The diffraction peaks of the cellulose/amylose blends were slightly shifted; specifically, () was shifted to a higher angle, and (1 1 0) and (0 2 0) were shifted to lower angles. These experimental results probably resulted from the disordered molecular sheet, as revealed by MD simulations. |
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Keywords: | Regenerated cellulose Structural formation mechanism Molecular dynamics (MD) simulation Cellulose blend Initial structure Molecular sheet |
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