Reuse of different agroindustrial wastes : pinhão and pecan nutshells incorporated into biocomposites using thermocompression

• Autor(a) principal: Engel, Juliana Both
• Data de Publicação: 2020
• Outros Autores: Ginity, Marina Mac, Luchese, Cláudia Leites, Tessaro, Isabel Cristina, Spada, Jordana Corralo
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/221267
• topic: Biopolímeros; Compósitos; Resíduos agroindustriais; Cassava starch; Pinhão shells; Pecan nutshells; Biodegradable composite

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 infuenced by the high lignin content in the residues. Regarding the mechanical properties, in both tensile and fexural 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, diferently from the result for samples incorporated with pecan nutshells that presented less resistant.