A Study on Moisture Absorption Test of Alkali-Treated Green Fibers

Abstract

AbstractThe synergetic impact of natural fibers on environmental pollution control in comparison with synthetic fibers attracts its application in different field of present research. The coir, sisal and sponge guard fibers are easily assessable and low priced as compared to synthetic or non-biodegradable glass or carbon fibers. Although the synthetic fibers are having high performance mechanical properties, green revolution emphasizes on the improvement of cost-effective natural bio-degradable fibers, having higher specific stiffness and good impact property. But the major disadvantage like water absorption, when subjected to humid environment, can be optimized by various heat or chemical treatment of fibers. In the current research, the collected green fibers are subjected to various alkali treatments like 5%NaOH, 3%KOH and 7% Ca (OH)2 for 4 h, 2 h and 6 h, respectively, and their aqua absorption behavior is studied for different time intervals. The water absorption behavior is inspected for both natural and alkali-treated natural fibers of different types. Water immersion test is carried out by absorbing fiber samples into water at normal atmospheric temperature condition till the immersion inclines to constant. After the experiment, it is discussed that Ca(OH)2 treatment absorbs less water within the specified duration as compared to other alkali treatments and untreated fibers also absorb maximum moisture than chemically treated fibers.KeywordsEco-friendlyChemical treatmentAqua absorptionGreen fibers