Effects of mercerization in the chemical and morphological properties of amazon piassava

Abstract

The objective of this work was to investigate the effects of mercerization on chemical, morphological and thermal properties of Amazon Piassava Fibers. The effect of this treatment was studied using XRF, SEM, XRD and TGA. The fibers have been treated in 5% and 10% NaOH for 60 min. The XRF results for treated and untreated fibers showed that there is a decrease in the amount of SiO 2 by increasing the NaOH concentration. It has been possible to observe through SEM in untreated fiber that the surface presents a well arranged pattern of silicon rich star-like protrusions. For the two concentrations, SEM allowed to notice that the removal of deleterious surface impurities and fiber roughness was enhanced. The removal of organic material after treatment can be observed in the TGA analysis. XRD analysis indicate an increase in the crystallinity index, 0.19 to 0.31 after the treatment for 10% concentration solutions.

Extraction and Characterization of Fiber Treatment Inula viscosa Fibers as Potential Polymer Composite Reinforcement

“…the peak was not visible, proving the complete removal of hemicellulose from the ber. The major second peak was observed at 365.51℃ due to degradation α-cellulose by 80.87% weight loss for untreated raw ber [47], whereas 3% alkaline treatment and 3% permanganate -treated at 363℃ and 350 with 67.7 % and 62% weight loss respectively [48]. It can be noted that surface modi cation by both treatments reduced the thermal stability properties of the IV bers, our ndings are consistent with previous works [49,50].…”

Crosslinking starch/oat hull mixtures for use in composites with PLA

“…It is possible that crosslinking via covalent or non-covalent bonds may have occurred, resulting in better interaction. Other authors reported the enhancement of fiber/matrix adhesion when the fiber was modified by different treatments [19][20][21][22][23] .…”

“…There are several types of chemical treatments (mercerization, oxidation, crosslinking, grafting, etc.) applied to the fibers, as well as studies on their influence on the properties of the composites prepared with the treated fiber [18][19][20][21][22][23][24] .…”

Hybrid polyurethane/natural fibers composites optimized by simplex-centroid mixture design

“…68,69 Rebelo et al reported that factors such as time of immersion of the fiber in the aqueous solution of NaOH and concentration of the solution are fundamental to not compromise the fibrillar structure. 67 It is proven that highly concentrated solutions cause degradation of the cellulosic material, which may influence the mechanical strength of the composite.…”