The development of cassava starch-based biocomposites incorporated with pecan nutshells and pinhão shells by thermocompression process was evaluated. The biocomposites were characterized in terms of thickness, bulk density, hydrophilicity, water absorption capacity (WAC), morphology, thermal and mechanical properties. The samples with residues incorporation showed lower WAC when compared to the control ones, for all evaluated times. Biocomposites containing the pinhão shells showed hydrophobic character, measured by the contact angle (greater than 90°). More irregularities were evidenced by the morphological analysis for the biocomposites added with pecan nutshells. The thermal stability of the biocomposites was influenced by the high lignin content in the residues. Regarding the mechanical properties, in both tensile and flexural tests, biocomposites containing pecan nutshells presented the lowest values of stress at break and modulus of elasticity. When compared to the control sample, the composites added with the pinhão shells had mechanical similar properties, differently from the result for samples incorporated with pecan nutshells that presented less resistant.

评估了通过热压工艺结合山核桃果壳和品尼高壳的木薯淀粉基生物复合材料的开发。根据厚度，堆积密度，亲水性，吸水能力（WAC），形态，热和机械性能对生物复合材料进行了表征。在所有评估的时间中，与对照相比，具有残留物掺入的样品显示出更低的WAC。含有pinhão的生物复合材料壳表现出疏水特性，通过接触角（大于90°）测量。通过对山核桃果壳添加生物复合物的形态分析，发现更多的不规则现象。残留物中高木质素含量影响生物复合材料的热稳定性。关于机械性能，在拉伸和弯曲试验中，含有山核桃果壳的生物复合材料的断裂应力和弹性模量均最低。当与对照样品比较时，添加了pinhão壳的复合材料具有相似的机械性能，这与掺入山核桃果壳的样品的耐力性能不同。