Formation of hydrogels from cellulose nanofibers
Formation of hydrogels from cellulose nanofibers
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DOI：
10.1016/j.carbpol.2011.03.028
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发表时间：
2011-07-01
影响因子：
11.2
通讯作者：
Yano, Hiroyuki
中科院分区：
文献类型：
--
作者：
Abe, Kentaro;Yano, Hiroyuki
我们报告的水凝胶的制备从结晶纤维素纳米纤维的水悬浮液仅通过碱处理。随着氢氧化钠（NaOH）浓度的增加，纳米纤维悬浮液转化为两种不同晶型的水凝胶。当在6- 9wt%NaOH中处理时，通过聚集具有原始形态和原始晶体形式纤维素I的纳米纤维形成水凝胶。然而，在15wt%NaOH下制备的水凝胶具有通过纤维素纳米纤维的聚结形成的网络，并表现出高度结晶的纤维素II结构。这种凝胶化过程似乎是由纤维素纳米纤维在碱性水溶液中的轴向收缩引起的。(C)2011爱思唯尔有限公司保留所有权利。
We report the preparation of hydrogels from an aqueous suspension of crystalline cellulose nanofibers only by alkaline treatment. The nanofiber suspensions were converted into two kinds of hydrogels with different crystal forms in response to the increasing concentration of sodium hydroxide (NaOH). When treated in 6-9 wt% NaOH, a hydrogel was formed by aggregating the nanofibers with the original morphology and the original crystal form, cellulose I. However, the hydrogel prepared at 15 wt% NaOH had a network formed by the coalescence of cellulose nanofibers and exhibited a highly crystalline cellulose II structure. This gelation process seems to be caused by the axial shrinkage of the cellulose nanofibers in aqueous alkaline solutions. (C) 2011 Elsevier Ltd. All rights reserved.