Characterization of Alkali-Treated Jute Fibers for Physical and Mechanical Properties

摘要

Changes occurring in jute fibers w~en treated with a 5% concentrationofal NaOH solution for 0,2,4,6, and 8 h were characterized by weight loss, linear density, tenacity, modulus, FTIR, and X-raymeasurements. A 9.63% weight loss was measured , during 2 h of treatment with a drop of hemicellulose content from 22 to 12.90%. The ~ linear density value .showed no change until 2 h of treatment ~ollowed by a decrease ~ from 33.0 to 14.5 denIer by 56% after 6 hoftreatment. The tenaCIty and modulus of the ( fibers improved by 45 and 79%, respectively, and the percent breaking strain was ~: reduced by 23% after 8 h of treatment. X-ray ditfractograms showed increase in r crystallinity of the fibers only after 6 h of treatment, while FTIR measurements showed , much of the changes occurring by 2 h of treatment with an increased amount of OH ~ groups. By measuring the rate of change of the modulus, tenacity, and percent breaking , strain with the time of treatment, a clear transition was apparent at 4 h of treatment ;, with the dissolution of hemicellulose, causing a weight loss and drop in the linear ~ density before and development of crystallinity with an improvement in the properties ;, after the transition time.