Extraction, modification, and characterization of natural ligno-cellulosic fiber strands from napier grass

Effect of Chemical Treatment and Fiber Loading on Mechanical Properties ofBorassus(Toddy Palm) Fiber/Epoxy Composites

“…The small shoulder band at 1743 cm -1 was assigned to the carbonyl groups (C=O) due to the presence of acetyl ester and carbonyl aldehyde groups of hemicellulose [16,20]. The band at 1651 cm -1 was due to the bending mode of the absorbed water [21].…”

“…The mould was filled with a mixture of matrix and chopped Borassus fibers (diameter and length in the range of 0.10 to 0.15 mm and 2 to 3 cm, respectively) in random orientation with varying fiber content (4,8,12,16,20 and 24% by weight) and allowed to cure at room temperature for 24 h. The cured laminates were demolded and post cured in a hot air oven at100 o C for 3h. Laminates were made from epoxy resin and hardener taken in the ratio of 100 and 15 parts by weight, respectively.…”

“…The untreated fiber [ Fig. Also binding materials were partially removed and, as a result, the individual cellular part was exposed on the surface [20]. It is usual that sodium hydroxide is the most commonly 9 used chemical for leaching or cleaning the surface of natural fibers.…”

“…The bands at 1423, 1370, and 1317 cm −1 were assigned to the -CH2 scissoring, -OH bending vibration and C-H asymmetric deformation of cellulose, respectively [21]. An intense band at 1234 cm -1 was attributed to the -COO vibration of acetyl groups in hemicellulose [16,20]. The bands at 1152, 1103 and 1036 cm -1 were assigned to the C-O-C, C-O, C-C stretching of cellulose [16,21].…”

Characterization of New Natural Fiber Extracted From Abelmoschusesculentus Stem

“…The average crystalline size (D) of the AESF was computed by substituting the X-ray wavelength value as 0.154 nm in λ, K value as 0.94 (Scherrer constant), FWHM (full-width at half maximum) value at (1 0 1) crystallographic plane in β (radian), and θ value as Bragg's angle at peak intensity count in Scherer Equation (3) [36] . The computed crystalline size (D) of the AESF is 2.68 nm, which is lower than that of Napier grass fiber (2.83 nm) and rice straw (3.75 nm) [37] . The CrI and crystalline size influence the chemical reactivity and water absorption capacity of the fiber [8] .…”