Poster De Conférence Année : 2025

Effect of chemical treatment of lignocellulosic fibers on rheological properties for ecofriendly biocomposites applications

Résumé

This work explores the development of eco-friendly biocomposites based on polylactic acid (PLA) reinforced with chemically treated lignocellulosic fibers, particularly sugarcane bagasse. PLA, a biosourced and biodegradable polymer, was chosen for its environmental advantages and non-toxic nature, making it a suitable matrix for sustainable material applications. To improve the interfacial adhesion between the fibers and the PLA matrix, a chemical surface treatment was initially applied to eliminate non-cellulosic components and enhance fiber compatibility. However, the use of sodium hydroxide (NaOH) for fiber purification, while effective in removing undesired components, was found to induce undesirable interactions with PLA, leading to a degradation of its rheological properties. This deterioration was confirmed through rheological analyses. To overcome this limitation, a neutralization step was introduced post-treatment. Subsequent analyses revealed that the thermal stability of PLA was preserved after neutralization, with no further signs of degradation. These results were corroborated by size exclusion chromatography (SEC), confirming the preservation of the PLA’s molecular integrity. Therefore, neutralized fibers can be safely incorporated into PLA-based systems to produce biocomposites with improved environmental profiles, offering promising perspectives for sustainable packaging and other eco-conscious applications.

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Dates et versions

hal-05093166 , version 1 (02-06-2025)

Identifiants

  • HAL Id : hal-05093166 , version 1

Citer

Mohamed Ait Balla, Abderrahim Maazouz, Khalid Lamnawar, Fatima Ezzahra Arrakhiz. Effect of chemical treatment of lignocellulosic fibers on rheological properties for ecofriendly biocomposites applications. Annual European Rheological Conference 2025, Apr 2025, Lyon, France. ⟨hal-05093166⟩
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