Ali Mohammad Asif, Singh Maninder, Zhang Shuo, Kaneko Daisaku, Okajima Maiko Kaneko, Kaneko Tatsuo
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Ave, Wuxi 214122, China.
Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technologies, 1-1 Asahidai, Nomi 923-1292, Ishikawa, Japan.
Polymers (Basel). 2024 Apr 15;16(8):1099. doi: 10.3390/polym16081099.
The molecular orientation of liquid crystalline (LC) hydrogels has the potential to induce a range of functionalities that can deliver great mechanical strength. Sacran is a supergiant LC polysaccharide isolated from the cyanobacterium with a high amount of anionic functional groups such as sulfates and carboxylates. In this article, ultra-strong sacran hydrogels and their dried fibers were produced by cross-linking under injection flow with trivalent metal ions such as Al, Cr, Fe, In, and rare-earth metal ions such Er and Sr. Crossed-polarizing microscopy and X-ray diffraction imaging revealed a uniaxial molecular orientation in the LC gel fiber, resulting in outstanding mechanical characteristics.
液晶（LC）水凝胶的分子取向有可能诱导一系列能提供强大机械强度的功能。Sacran是一种从蓝细菌中分离出的超大型LC多糖，含有大量的阴离子官能团，如硫酸盐和羧酸盐。在本文中，通过与Al、Cr、Fe、In等三价金属离子以及Er和Sr等稀土金属离子在注射流作用下交联，制备出了超强Sacran水凝胶及其干燥纤维。交叉偏振显微镜和X射线衍射成像显示，LC凝胶纤维中存在单轴分子取向，从而产生了出色的机械特性。
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