Formation of hydrogels from cellulose nanofibers

被引：123

作者：

Abe, Kentaro ^{[1
,2
]}

Yano, Hiroyuki ^{[1
,2
]}

机构：

[1] Kyoto Univ, Pioneering Res Unit Next Generat, Kyoto 6110011, Japan

[2] Kyoto Univ, Res Inst Sustainable Humanosphere, Kyoto 6110011, Japan

来源：

CARBOHYDRATE POLYMERS | 2011年 / 85卷 / 04期

关键词：

Hydrogel; Cellulose nanofiber; Alkaline treatment; ENZYMATIC-HYDROLYSIS; AQUEOUS NAOH; MERCERIZATION; MICROFIBRIL; WOOD; CONTRACTION; FORCE; CELLS; FIBER; SIZE;

D O I：

10.1016/j.carbpol.2011.03.028

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

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.

引用

页码：733 / 737

页数：5

共 23 条

[1] Obtaining cellulose nanofibers with a uniform width of 15 nm from wood [J].

Abe, Kentaro ;

Iwamoto, Shinichiro ;

Yano, Hiroyuki .

BIOMACROMOLECULES, 2007, 8 (10) :3276-3278

[2] Comparison of the characteristics of cellulose microfibril aggregates isolated from fiber and parenchyma cells of Moso bamboo (Phyllostachys pubescens) [J].

Abe, Kentaro ;

Yano, Hiroyuki .

CELLULOSE, 2010, 17 (02) :271-277

[3] Comparison of the characteristics of cellulose microfibril aggregates of wood, rice straw and potato tuber [J].

Abe, Kentaro ;

Yano, Hiroyuki .

CELLULOSE, 2009, 16 (06) :1017-1023

[4] Mercerization of primary wall cellulose and its implication for the conversion of cellulose I → cellulose II [J].

Dinand, E ;

Vignon, M ;

Chanzy, H ;

Heux, L .

CELLULOSE, 2002, 9 (01) :7-18

[5] Cellulose microfibril aggregates and their size variation with cell wall type [J].

Donaldson, Lloyd .

WOOD SCIENCE AND TECHNOLOGY, 2007, 41 (05) :443-460

[6] Pore and matrix distribution in the fiber wall revealed by atomic force microscopy and image analysis [J].

Fahlén, J ;

Salmén, L .

BIOMACROMOLECULES, 2005, 6 (01) :433-438

[7] The thermal expansion of wood cellulose crystals [J].

Hori, R ;

Wada, M .

CELLULOSE, 2005, 12 (05) :479-484

[8] Contraction of the microfibrils of wood treated with aqueous NaOH: evidence from changes in the anisotropy of the longitudinal and transverse swelling rates of wood [J].

Ishikura, Yukiko ;

Nakano, Takato .

JOURNAL OF WOOD SCIENCE, 2007, 53 (02) :175-177

[9] NATIVE FOLDED-CHAIN CELLULOSE-II [J].

KUGA, S ;

TAKAGI, S ;

BROWN, RM .

POLYMER, 1993, 34 (15) :3293-3297

[10] Toughness enhancement of cellulose nanocomposites by alkali treatment of the reinforcing cellulose nanofibers [J].

Nakagaito, Antonio Norio ;

Yano, Hiroyuki .

CELLULOSE, 2008, 15 (02) :323-331

← 1 2 3 →