Considering the cost in utilization of organic natural filler as an alternative to manmade fiber and mineral inorganic filler-reinforced polymer composite is of great interest. The main reasons for using natural fillers are to reduce the dependence on petroleum-based, nonrenewable resources and are also a smarter use of environment and financial resources. Only limited research works have been done on the mechanical properties, such as tensile, flexural, and impact on particulate organic natural filler-reinforced polymer composite. The effect of particle size, particle loading, and chemical treatment on mechanical properties of organic natural filler-reinforced polymer composites is reviewed and discussed. The results show that a smaller particle size with an aspect ratio higher than its critical value provided better mechanical properties. With the assumption of good adhesion between the particle filler and matrix, mechanical properties increased with volume fraction until it reached its optimum condition or failure. Effective chemical treatments would improve the homogeneity and adhesion of the filler/matrix, thus enhancing the mechanical properties of the composites.

考虑到利用有机天然填料替代人造纤维和矿物无机填料增强的聚合物复合材料的成本是非常令人感兴趣的。使用天然填料的主要原因是为了减少对石油基不可再生资源的依赖，同时也是对环境和财务资源的更明智利用。对于机械性能，例如拉伸，挠曲和对颗粒状有机天然填料增强的聚合物复合材料的影响，仅进行了有限的研究工作。审查和讨论了粒径，颗粒载荷和化学处理对有机天然填料增强的聚合物复合材料力学性能的影响。结果表明，长径比大于其临界值的较小粒径可提供更好的机械性能。假设颗粒填料和基体之间具有良好的粘合性，则机械性能会随着体积分数的增加而提高，直到达到最佳状态或失效。有效的化学处理将改善填料/基体的均匀性和粘合性，从而增强复合材料的机械性能。