High-strength nanocomposite based on fibrillated chemi-thermomechanical pulp

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• 作者：Kentaro Abe ; Fumiaki Nakatsubo ; Hiroyuki Yano
• 关键词：A. Fibers ; A. Nanocomposite ; A. Cellulose microfibril ; B. Mechanical properties ; D. Scanning electron microscopy (SEM)
• 刊名：Composites Science and Technology
• 出版年：2009
• 出版时间：November 2009
• 年：2009
• 卷：69
• 期：14
• 页码：2434-2437
• 全文大小：430 K

文摘

The incompatibility between cellulose fibers and hydrophobic polymers has presented a major obstacle for the fabrication of composites and nanocomposites. In this study, we applied a one-time grinder treatment to disintegrate chemi-thermomechanical pulp (CTMP) and obtained micro- to nano-meter-sized lamellar or fibrous fragments. The CTMP fragments were composed of cellulose microfibrils with high aspect ratios encased in matrix substances including hydrophobic lignin. Furthermore, we produced compression-molded products from the CTMP fragments by thermally plasticizing lignin without any adhesives or resins. The molded products pressed at 180 °C exhibited a plastic-like gloss on the surface and a high bending strength, 221 MPa, which greatly exceeded that of the conventional plant-based binderless boards. The molded products produced here are a novel form of ideal cellulose nanocomposite, which exploited the inherent compatibility between cellulose microfibrils and matrix substances present in CTMP fragments.