纤维素
制作
自愈水凝胶
极限抗拉强度
堆积
材料科学
水溶液
溶剂
化学工程
复合材料
高分子化学
化学
有机化学
工程类
医学
替代医学
病理
作者
Zaiwu Yuan,Jingjing Zhang,An Jiang,Wenting Lv,Yuewen Wang,Hongjuan Geng,Jin Wang,Menghua Qin
标识
DOI:10.1016/j.carbpol.2014.10.003
摘要
Based on the formation of cellulose hydrogels in NaOH/urea aqueous solvent media, cellulose self-assembly precursor is acquired. It is proved that the water uptake capability of the cellulose hydrogels depends highly on the cross-link degree (CLD) of cellulose. With varying CLD and concentration of cellulose, a variety of morphologies of cellulose self-assemblies, including sheets with perfect morphology, high-aspect-ratio fibers, and disorganized segments and network, are formed through evaporation. Furthermore, cellulose films are fabricated by diecasting and evaporating the cellulose hydrogels, resulting in a 3D-ordered structure of closely stacking of cellulose sheets. The mechanical test indicates both tensile strength and flexibility of the cellulose films are greatly improved, which is attributed to the formation of the orderly stacking of cellulose sheets. The study is expected to lay an important foundation on the preparation of ordered and high-strength cellulose materials.
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