Wood cellulose biocomposites with fibrous structures at micro- and nanoscale
Wood cellulose biocomposites with fibrous structures at micro- and nanoscale
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DOI：
10.1016/j.compscitech.2010.12.007
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发表时间：
2011-02
影响因子：
9.1
通讯作者：
H. Sehaqui;Maël Allais;Qi Zhou;L. Berglund
中科院分区：
文献类型：
--
作者：
H. Sehaqui;Maël Allais;Qi Zhou;L. Berglund
在半自动板材成型机上制备了木纤维/纳米纤维(NFC)高强度复合材料。通过拉伸试验、动态力学热分析、场发射扫描电子显微镜和孔隙率测量对复合材料进行了表征。当木纤维中加入10%的NFC时，木纤维的拉伸强度从98 Mpa提高到160 Mpa，断裂功增加一倍以上。复合材料具有层次化结构，表现为微米尺度的木纤维网络和连接木纤维的NFC纳米纤维网络，并占据了部分微米尺度的孔隙率。讨论了变形机制以及这种生物复合材料概念的可能应用。
High-strength composites from wood fiber and nanofibrillated cellulose (NFC) were prepared in a semi-automatic sheet former. The composites were characterized by tensile tests, dynamic mechanical thermal analysis, field-emission scanning electron microscopy, and porosity measurements. The tensile strength increased from 98MPa to 160MPa and the work to fracture was more than doubled with the addition of 10% NFC to wood fibers. A hierarchical structure was obtained in the composites in the form of a micro-scale wood fiber network and an additional NFC nanofiber network linking wood fibers and also occupying some of the micro-scale porosity. Deformation mechanisms are discussed as well as possible applications of this biocomposites concept.