A non-solvent approach for high-stiffness all-cellulose biocomposites based on pure wood cellulose

被引：59

作者：

Nilsson, Helena ^{[1
,2
]}

Galland, Sylvain ^{[1
]}

Larsson, Per Tomas ^{[1
,2
]}

Gamstedt, E. Kristofer ^{[1
,3
]}

Nishino, Takashi ^{[4
]}

Berglund, Lars A. ^{[1
,3
]}

Iversen, Tommy ^{[1
,2
]}

机构：

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

[2] INNVENTIA AB, SE-11486 Stockholm, Sweden

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

[4] Kobe Univ, Dept Chem Sci & Engng, Nada Ku, Kobe, Hyogo 6578501, Japan

来源：

COMPOSITES SCIENCE AND TECHNOLOGY | 2010年 / 70卷 / 12期

关键词：

Wood; Mechanical properties; CP/MAS C-13 NMR; Heat treatment; Isostatic pressing; CRYSTALLINE REGIONS; FIBRIL AGGREGATION; ELASTIC-MODULUS; PAPER; DEGRADATION; MECHANISMS; FIBERS;

D O I：

10.1016/j.compscitech.2010.06.016

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

All-cellulose composites are commonly prepared using cellulose solvents. In this study, moldable all-cellulose I wood fiber materials of high cellulose purity (97%) were successfully compression molded. Water is the only processing aid. The material is interesting as a "green" biocomposite for industrial applications. Dissolving wood fiber pulps (Eucalyptus hardwood and conifer softwood) are used and the influence of pulp origin, beating and pressing temperature (20-180 degrees C) on supramolecular cellulose nanostructure is studied by solid state CP/MAS C-13 NMR. Average molar mass is determined by SEC to assess process degradation effects. Mechanical properties are determined in tensile tests. High-density composites were obtained with a Young's modulus of up to 13 GPa. In addition, nanoscale cellulose fibril aggregation was confirmed due to processing, and resulted in a less moisture sensitive material. (c) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1704 / 1712

页数：9

共 38 条

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