Abstract
ABSTRACT Diss fibers, also called Ampelodesmos mauritanicus, are one of the least studied fibers in the literature. Indeed, the rare studies discussed have focused on mechanical and physicochemical properties. The present work deals with hygrothermal characterization and the effect of treatments on their behavior. So, untreated and treated Diss fibers with chemical treatments (alkaline, silane, and acetic acid) and heat treatment were characterized by absorption tests by water immersion and others by water vapor adsorption and desorption (Proumid-SPS). The results found have shown that these fibers presented a type II sorption isotherm with hysteresis where their saturation point could reach up to 40% of their dry mass. However, the treatments carried out seem to be able to reduce their hydrophilic nature especially after heat, silane, and acetic acid treatments. The adsorption kinetics, on the other hand, also seem to be positively influenced by these treatments, especially after the chemical treatments.
Highlights
Development of bio-based composites represents one of the sustainability approaches for the industry
Treatment methods In order to analyze the effect of the treatment type on the hygrothermal behavior five kind of fibers have been studied: untreated technical Diss fibers (UTFD), treated with NaOH (NTFD), treated with silane (STFD), treated with acetic acid (ATFD) and thermally treated (TTFD)
They are characteristic of the carboxyl functions of pectin, which should be affected by the water absorption
Summary
Development of bio-based composites represents one of the sustainability approaches for the industry. The present work aims to explore the characteristics and performance of a natural fiber used as reinforcement of bio-composite. Natural fibers continue to attract high research interest with focus on the prediction of their behavior when exposed to environment to optimize their durability. One of the most important durability aspects of composites is their hygrothermal properties that dictate the insulating behavior. The monitoring and quantification of water molecules progress within composite allows the determination of insulating properties. Before discussing the hygro-thermal properties of new bio-based composites, it is necessary to understand the hygrothermal behavior of the natural fibers alone
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