Development Of Green Composites Using
Agricultural Waste
Author(s)
T. Ota & A. Uehira
Abstract
This study deals with the development and evaluation of environment-friendly
composites that are composed of polylactic acid (PLA) resin and rice straw. The
rice straw fibers were extracted from rice straw harvested in Toyama city. The
preliminary composites were prepared by mixed rice straw fiber and PLA resin,
followed by drying at 50ºC for 24 hours. Rice straw green composites were
fabricated by the vacuum assisted hot pressing method. The mould temperature
was changed from 150ºC to 210ºC, in order to investigate the effect of molding
conditions on the mechanical properties of rice straw green composites. The
molding pressure and time was fixed to 2MPa and 10 minutes, respectively. The
water evaporation rate for rice straw green composites was measured in order to
investigate the variation in moisture with respect to the drying time for rice straw
fiber or rice straw/PLA composites. The evaporation rate of rice straw/PLA
composites was lower than that of rice straw fiber. The flexural strength and
modulus increased with increasing the fiber weight fraction of rice straw green
composites, and indicated a peak flexural strength and a peak flexural modulus at
the molding temperature ranges near 180ºC, the fiber weight fraction 30 wt.%.
Keywords: green composites, rice straw, polylactic acid (PLA), vacuum assisted
hot press molding, flexural properties.
1 Introduction
In recent years, natural fiber reinforced thermoplastics (NFRTP) have been
gaining considerable attention for their potential contribution to improve
Keywords
green composites, rice straw, polylactic acid (PLA), vacuum assisted
hot press molding, flexural properties.
Related Book
Other papers in this volume
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