花生壳粉含量对聚乳酸/花生壳粉复合材料性能的影响

以聚乳酸（PLA）、花生壳粉为主要原料，以硅烷为偶联剂，采用模压成型法制备了PLA/花生壳粉复合材料，研究了花生壳粉含量对复合材料力学性能、吸水性能、摩擦磨损性能以及结晶性能的影响。结果表明，随着花生壳粉含量的增加，复合材料的洛氏硬度和冲击强度呈先降低后升高的趋势，拉伸强度和弯曲强度逐渐升高，均在花生壳粉含量为50 %(质量分数，下同)时达到最大；吸水性能逐渐提高；磨损性能逐渐降低；当花生壳粉含量为50 %时，PLA/花生壳粉材料具有优良的力学性能和吸水性能。

Effect of Content of Peanut Hull Powders on Properties of PLA/Peanut Hull Powder Composites

PLA/peanut hull powers composites were prepared by a compression molding method, and the effect of content of peanut hull powders on the mechanical properties, water absorption, wear performance and crystallinity of the composites were investigated. The results indicated that the Rockwell hardness and impact strength of the composites were found to decrease at first and then increased with an increase of content of peanut hull powders, and however the tensile strength and flexural strength tended to increase gradually up to a maximum value at the peanut hull content of 50 wt%. Moreover, the water absorption tended increase gradually but the wear performance decreased gradually with increasing the content of peanut hull powders. The optimum content of peanut hull powders was determined as 50 wt% on the basis of the experimental results, at which the composites exhibited good mechanical properties and low water absorption.