期刊
MECHANICS OF MATERIALS
卷 40, 期 4-5, 页码 446-452出版社
ELSEVIER
DOI: 10.1016/j.mechmat.2007.10.006
关键词
biodegradable composites; natural fiber; kenaf; PLA; strength; biodegradability
This paper describes the cultivation of kenaf and application to biodegradable composite materials. The unidirectional biodegradable composite materials were made from kenaf fibers and an emulsion-type PLA resin. Thermal analysis of kenaf fibers revealed that tensile strength of kenaf fibers decreased when kept at 180 degrees C for 60 min. Therefore, biodegradable composites were fabricated at a molding temperature of 160 degrees C. The unidirectional fiber-reinforced composites showed tensile and flexural strengths of 223 MPa and 254 MPa, respectively. Moreover, tensile and flexural strength and elastic moduli of the kenaf fiber-reinforced composites increased linearly up to a fiber content of 50%. The biodegradability of kenaf/PLA composites was examined for four weeks using a garbage-processing machine. Experimental results showed that the weight of composites decreased 38% after four weeks of composting. (c) 2007 Elsevier Ltd. All rights reserved.
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