期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 43, 期 4, 页码 686-694出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2012.01.007
关键词
Polymer-matrix composites (PMCs); Chemical properties; Physical properties; Thermal analysis
资金
- USDA
- Tennessee Agricultural Experiment Station [96]
Hygroscopicity, low durability, and low thermal resistance are disadvantages of lignocellulosic materials that also plague wood-plastic composites (WPCs). Hemicellulose is the most hydrophilic wood polymer and is currently considered as a sugar source for the bioethanol industry. The objective of this research is to extract hemicellulose from woody materials and enhance the properties of WPC by diminishing the hydrophilic character of wood. Hemicellulose of Southern Yellow Pine was extracted by hot-water at three different temperatures: 140, 155, and 170 degrees C. Wood flour was compounded with polypropylene in an extruder, both with and without a coupling agent. Injection molding was used to make tensile test samples. The thermal stability of wood flour was found to have increased after extraction. Extraction of hemicellulose improved the tensile strength and water resistance of composites, which may indicate a decrease in the hygroscopicity of wood flour, better compatibility, and interfacial bonding of the filler and matrix. (c) 2012 Elsevier Ltd. All rights reserved.
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