28 Jan Publication : Effect of a low melting temperature mixture on the surface properties of lignocellulosic flax bast fibers
Bast flax fibers were treated, with or without ultrasound assistance, using a low melting mixture (LMM) composed of lactic acid, d-glucose and water. This LMM treatment affected both lignin and hemicelluloses contents and modified the fibers properties identified as crucial parameters in an industrial context, i.e. coloration, wettability, crystallinity, fibers diameter and chemical composition. Surface chemistry of the fibers were investigated through fluorescent tagged carbohydrates binding modules revealing macromolecular rearrangements responsible of both a fibers crystallinity enhancement and an unexpected hydrophobicity. It has been found that LMM treatments bleach fibers, which is considered a beneficial effect independent of the treatments.
Sophie Morin, Brieuc Lecart, Thibaut Istasse, Claire Bailly Maître Grand, Fatma Meddeb-Mouelhi, Marc Beauregard, Aurore Richel