Effect of chemical treatment on physico-chemical properties of a novel extracted cellulosic Cryptostegia grandiflora fiber ^∗

Abstract

The demand for composites made with natural fibers instead of synthetic counterparts is increasing day-by-day, as a part of strategic measure to reduce environmental pollution. In this study, novel fibers were extracted from the stem of the Cryptostegia grandiflora (CG) plant and their surface morphology, physical and mechanical properties were comprehensively investigated, using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The Cryptostegia grandiflora fibers (CGFs) were studied before and after alkaline and silane treatments. The reduction of hemicellulose, lignin and pectin after the chemical treatment was evidenced through XRD, FTIR and SEM analysis. The results obtained after XRD analysis established that the surface treatments improved the crystallinity index (CrI) of the CGFs. The silane treated CGFs, exhibited maximum tensile strength, better thermal stability and surface roughness when compared with untreated and alkali treated counterparts. The properties obtained after the chemical treatment of the CGFs suggested their potential suitability for a reinforcement of biocomposite structures.

Experimental study of Yushania alpina bamboo fiber

“…The degradation of hemicellulose ended around 400 °C. Lignin degradation started at a temperature less than 200 °C and extended to a wide range up to the end temperature, which contributed to the acceleration of the reaction of hemicellulose and cellulose [53,54]. The third degradation, which is cellulose, ended around 500 °C.…”

Impact of silanization on the characterization of Corchorus olitorius particle‐based composites for sustainable applications

“…35 When the results were compared to those of Udhayakumar et al, comparable patterns were seen to those shown in the figure, where the peak impulses at 1024 cm −1 were demonstrated to represent the symmetric C−OH widening in the lignin following silanization of Cryptostegia grandiflora fibre. 36 Thermomechanical characterization of the developed composites Tensile outcomes According to the outcomes of the experiments, integrating Corchorus olitorius particles with the matrix enhances the composite's strength and stiffness over a neat epoxy composite for both untreated Corchorus olitorius particle composites and treated composites. The strength and modulus values increase as the particle percentage rises to 5 wt%, which explains the improvement in stress transmission within the composite material.…”