An Ultrastrong Nanofibrillar Biomaterial: The Strength of Single Cellulose Nanofibrils Revealed via Sonication-Induced Fragmentation

被引：494

作者：

Saito, Tsuguyuki ^{[1
,2
]}

Kuramae, Ryota ^{[1
]}

Wohlert, Jakob ^{[2
]}

Berglund, Lars A. ^{[2
,3
]}

Isogai, Akira ^{[1
]}

机构：

[1] Univ Tokyo, Grad Sch Agr & Life Sci, Dept Biomat Sci, Tokyo 1138657, Japan

[2] Royal Inst Technol, Wallenberg Wood Sci Ctr, SE-10044 Stockholm, Sweden

[3] Royal Inst Technol, Dept Fibre & Polymer Technol, SE-10044 Stockholm, Sweden

来源：

BIOMACROMOLECULES | 2013年 / 14卷 / 01期

基金：

日本学术振兴会;

关键词：

ATOMIC-FORCE MICROSCOPY; TRANSMISSION ELECTRON-MICROSCOPY; TEMPO-OXIDIZED CELLULOSE; ELASTIC-MODULUS; CRYSTALLINE REGIONS; CARBON NANOTUBES; NATIVE CELLULOSE; INDUCED SCISSION; MECHANISM; BACTERIAL;

D O I：

10.1021/bm301674e

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

We report the mechanical strength of native cellulose nanofibrils. Native cellulose nanofibrils, purified from wood and sea tunicate, were fully dispersed in water via a topochemical modification of cellulose nanofibrils using 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO) as a catalyst. The strength of individual nanofibrils was estimated based on a model for the sonication-induced fragmentation of filamentous nanostructures. The resulting strength parameters were then analyzed based on fracture statistics. The mean strength of the wood cellulose nanofibrils ranged from 1.6 to 3 GPa, depending on the method used to measure the nanofibril width. The highly crystalline, thick tunicate cellulose nanofibrils exhibited higher mean strength of 3-6 GPa. The strength values estimated for the cellulose nanofibrils in the present study are comparable with those of commercially available multiwalled carbon nanotubes.

引用

页码：248 / 253

页数：6

共 44 条

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