Polímeros: Ciência e Tecnologia
https://revistapolimeros.org.br/article/doi/10.1590/0104-1428.20240032
Polímeros: Ciência e Tecnologia
Original Article

Processing and characterization of biocomposites based on polylactic acid and coconut by-products

Yulinali Valente Morales; Luz del Carmen Montoya-Ballesteros; Luis Enrique Robles-Ozuna; Yesica Yudith Martínez Núñez; Judith Fortiz Hernández; José Carmelo Encinas-Encinas; Tomás Jesús Madera-Santana

http://dx.doi.org/10.1590/0104-1428.20240032 Polímeros: Ciência e Tecnologia, vol.34, n2, e20240020, 2024
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Abstract

Coconut mesocarp fiber (CMF) is a by-product of the coconut industry; it was milled to produce coconut mesocarp particles (CMP). The main elements identified in CMP samples were C and O, which represent 96.75%. The CMP were mixed with a polylactic acid (PLA) matrix by extrusion. The mechanical, thermal, structural, and morphological properties of four biocomposites with 0, 2, 5, and 8 wt% CMP (CMP0, CMP2, CMP5, and CMP8, respectively) were determined. The biocomposites showed a decrease in tensile strength, elongation at break, and elastic modulus values as the CMP content increased, except for CMP5, which showed a higher elastic modulus than the PLA matrix. The thermal analysis showed that the biocomposites presented better thermal stability than the PLA matrix. CMP2 and CMP5 had rough surfaces, while CMP8 had weaker fracture zones.

 

 

Keywords

composite materials, agroindustrial by-product, morphological analysis, physicochemical properties, bioplastic matrix

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