Formation of nematic ordered cellulose and chitin
Formation of nematic ordered cellulose and chitin
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DOI：
10.1023/b:cell.0000046413.91309.55
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发表时间：
2004-09
期刊：
影响因子：
5.7
通讯作者：
T. Kondo;Wakako Kasai;R. Brown
中科院分区：
文献类型：
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作者：
T. Kondo;Wakako Kasai;R. Brown
我们在之前的一篇论文中提出了一种独特的 β-葡聚糖缔合形式，即分子有序但非结晶的向列有序纤维素 (NOC)。 NOC具有独特的特点；特别是，其表面特性提供了轨道或支架的功能，用于调节木醋杆菌的运动和纤维生产[Kondo et al. 2002. 程序。国家。阿卡德。科学。美国 99：14008–14013]。为了扩展这种 NOC 膜作为功能模板的用途，本文试图阐明如何通过水溶胀纤维素凝胶膜的单轴拉伸来引发和建立 β-葡聚糖缔合。采用广角X射线衍射、高分辨率透射电子显微镜和原子力显微镜来展示不同尺度的有序分子行为。然后，将NOC的制备方法应用于其他碳水化合物聚合物，例如α-甲壳素和纤维素/α-甲壳素混合物，产生向列有序态以及纤维素。然而，该方法不一定能在分子尺度上提供像NOC这样的典型结构。相反，它产生了各种不同尺度的分层向列有序态，这使得开发新的人工有序片结构成为可能。
We proposed in a previous paper a unique form of β-glucan association, nematic ordered cellulose (NOC) that is molecularly ordered, yet non-crystalline. NOC has unique characteristics; in particular, its surface properties provide with a function of tracks or scaffolds for regulated movements and fiber-production ofAcetobacter xylinum[Kondo et al. 2002. Proc. Natl. Acad. Sci. USA 99: 14008–14013]. In order to extend the usage of this NOC film as a functional template, the present article attempts to clarify how β-glucan association is initiated and established by uniaxial stretching of water swollen cellulose gel films. Wide angle X-ray diffraction, high-resolution transmission electron microscopy and atomic force microscopy were employed to exhibit molecular behavior of the ordering at various scales. Then, the preparative method for NOC was applied to the other carbohydrate polymers such as α-chitin and cellulose/α-chitin blends, leading to nematic ordered states as well as cellulose. However, the method did not necessarily provide the typical structure like NOC at the molecular scale. Instead, it yielded a variety of hierarchical nematic ordered states at various scales, which allows development of new artificial ordered sheet structures.