期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 69, 期 7-8, 页码 1187-1192出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2009.02.022
关键词
Polylactic acid; Microfibrillated cellulose; Nanocomposites; Differential scanning calorimetry; Thermo-mechanical properties
资金
- Ministry of Education, Culture, Sports, Science and Technology-Japan
- Ministry of Education, Culture, Sports, Science and Technology-Japan [1538012, 2003.4-2007.3]
- Ministry of Economy, Trade and Industry, Japan [17S5018, 2006.9-2007.3]
This paper describes the thermal and mechanical properties of nanocomposites based on polylactic acid (PLA) and microfibrillated cellulose (MFC). The primary objective of this study was to improve the storage modulus of PLA at a high temperature. MFC and PLA were mixed in an organic solvent with various fiber contents up to 20 wt%, followed by drying, kneading and hot pressing into sheets. The nanocomposites were prepared in two different states, fully amorphous and crystallized. Differential scanning calorimetry (DSC) measurements revealed that the presence of MFC accelerates the crystallization of FLA. The tensile modulus and strength of neat PLA were improved with an increase of MFC content in both amorphous and crystallized states. The addition of 20 wt% of MFC in PLA improved the storage modulus of crystallized PLA at a high temperature (120 degrees C) from 293 MPa to 1034 MPa. (C) 2009 Elsevier Ltd. All rights reserved.
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