Abstract
Viscose as cellulosic origin, the cheapest of all cellulosic fabrics could be the best alternative. Viscose is manufactured from regenerated cellulose. In order to manufacture viscose, pulp of bamboo is treated with aqueous sodium hydroxide to form alkali cellulose. This alkali cellulose is then treated with carbon disulfide to form sodium cellulose xanthate. The xanthate is then dissolved in aqueous sodium hydroxide and allowed to depolymerize. After depolymerization, rayon fiber is produced from the ripened solution. Viscose is primarily employed in apparels, upholstery fabric, industrial clothing, and medical hygiene. Apparels, upholstery fabric, and industrial clothing segments account for key share of the viscose market. The medical hygiene segment is anticipated to expand during the forecast period. Demand for viscose fiber is anticipated to increase significantly in the near future due to the rise in global population, increase in standard of living, and growth in disposable income. Viscose is an eco-friendly product; thus, increase in awareness about eco-friendly products and decrease in production of cotton are estimated to augment the demand for viscose fiber. Viscose fabric exhibits some similar properties compared to cotton except its poor wet strength due to higher moisture regain. In this study, chemical finishes by different cross-linkers were applied to improve the wet strength of the viscose fabric. For this purpose, water repellent finishes were applied. Water repellent finish helped in reducing the molecular barrier around the individual fibres that lowered the surface tension of the fabric. It reduces the absorbency of viscose fabric hence leads to higher wet strength. Therefore, the treated viscose fabric exhibited better wet strength after applying water repellent finishes on it. Scanning electron microscope (SEM) was used to examine the surface of the fabric treated with chemicals. Tensile strength of viscose was increased 24.6%.
Highlights
Today viscose is an important cellulosic fiber mostly used in textiles
The results show that the viscose reveals the higher wet strength, indicating the possibility of Fluorocarbon SEM (FC) deposited on the surface of fibers to the capillary inter fiber or inter yarn spaces in the fabric
The abrasion resistance of viscose fabric has increased because the weight loss of fabric was decreased (0.42% when was treated with Nuva 1811 for 1000 cycles compare to the untreated fabric 1.4%)
Summary
Today viscose is an important cellulosic fiber mostly used in textiles. The most abundant source of cellulose is wood, of which it constitutes about 50%. ”Water-repellent fabric” is a fabric with many holes and is capable of venting and evaporating water. This fabric allows the water to pass through it when the used pressure is high enough. ”Waterproof fabric” is water resistant fabric under hydrostatic pressure much higher than ”Waterrepellent fabric”. This fabric has fewer holes and the air permeability and water vapor is worse [2,3]. All of those finishing methods must ensure the breathability and the comfort of the fabric. The fluorocarbons are synthesized by make bonding between perfluro alkyl groups or urethane monomers to form polymer which will
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