Work

Acoustic and Functional Properties of PLA‐Walnut Biocomposites

Year: 2026

Type: article

Abstract: ABSTRACT The aim of this study is to develop and characterize biodegradable biocomposites based on polylactic acid (PLA) reinforced with walnut shell particles. Composite specimens were fabricated via compression molding with walnut shell loadings ranging from 10% to 50%. A comprehensive suite of analyses was conducted, including scanning electron microscopy (SEM), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), tensile and impact mechanical tests, and acoustic emission (AE) monitoring to elucidate fracture mechanisms. Results demonstrated that the addition of walnut shell reduced tensile strength and maximum elongation, while maintaining acceptable stiffness at intermediate loadings. Thermally, the biocomposites exhibited multi‐stage degradation and remained stable up to approximately 200°C. AE results indicated a transition from ductile to brittle fracture behavior as the reinforcement content increased. In conclusion, PLA/walnut biocomposites present a balanced combination of functional performance and sustainability, making them promising candidates for biodegradable packaging, agricultural applications, and low‐load structural components.

Source: ChemistrySelect

DOI: 10.1002/slct.202504138

Authors: Tomás Jesús Madera‐Santana, Emilio Pérez‐Pacheco, Mario Adrián de Atocha Dzul‐Cervantes, Carlos Rolando Ríos‐Soberanis

Institutions: Centro de Investigación en Alimentación y Desarrollo, Tecnológico Nacional de México, Centro de Investigación Científica de Yucatán, A.C

Language: English

Topic: Natural Fiber Reinforced Composites

Subfield: Polymers and Plastics

Field: Materials Science

Domain: Physical Sciences

SDG: Responsible consumption and production

Open Access status: hybrid

Estimated APC paid: $3,880