落花生殼のプラスチック充填材としての活用

概要

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Composite materials combining peanut hull powder and poly lactic acid (PLA) resin were prepared by a compression molding method. The density, water absorption properties and bending properties of these composite materials were evaluated. The density of the composite materials was lower than the theoretical denity, which was calculated by using peanut hull density and PLA resin density, because of many cavities in peanut hull. The critical water absorption ratio and mass diffusivity increased with the increase in weight content of peanut hull. Especially, the critical water absorption ratio and mass diffusivity of the composite material with 75% weight peanut hull content were about 15 times and 2.4 times higher than those of PLA resin respectively. As a result of 3-point bending tests, the bending modulus of the composite materials improved as increasing in weight content of peanut hull up to 50%. At peanut hull weight content more than 25%, the bending strength decreased with an increase in weight content because of many cavities and the poor fiber/resin interfacial bonding. Furthermore, the cost performance of composite materials based on flexural rigidity, material cost and thickness was discussed.
一般社団法人日本機械学会の論文
2007-07-25