期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 106, 期 -, 页码 149-155出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2014.11.012
关键词
Nanocomposites; Mechanical properties; Thermal properties; Scanning electron microscopy (SEM); Extrusion
资金
- European Commission [280786, FP7NMP-2011-ECLIPSE]
Plasticized polylactic acid (PLA) and its nanocomposite based on cellulose nanofibers (CNF) and glycerol triacetate (GTA) were prepared using a co-rotating twin-screw extruder. GTA was used as a plasticizer, a processing aid to facilitate nanofiber dispersion and as a liquid medium for their feeding. The optical, thermal and mechanical properties were characterized and the toughening mechanism was studied. The addition of GTA (20%) and CNF (1%) resulted in increased degree of crystallinity and decreased optical transparency. Furthermore, these additives showed a positive effect on the elongation at break and toughness, which increased from 2% to 31% and from I to 8 MJ/m(3), respectively. The combination of slippage of the nanofiber matrix-interface and a massive crazing effect as a result of the presence of CNF is suggested for PLA toughening. CNF were expected to restrict the spherulite growth and therefore enhance the craze nucleation. (C) 2014 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据