نوع مقاله : مقاله پژوهشی
دانشگاه آزاد اسلامی واحد اراک، دانشکده فنی
عنوان مقاله [English]
Mercerization of cotton fabrics leads to improved tensile strength, dye absorption, chemical reactivity, dimensional stability and luster of the fabrics. Due to lack of sufficient information, in this research the interactive parameters such as temperature and alkali concentration were investigated on mercerization of cotton fabrics. Mercerizing was carried out under different temperatures, within temperature range of 15-90ºC and variable concentrations of sodium hydroxide in both slack state and under tension. After mercerization process the fabric samples were bleached and then dyed with a reactive dye. The effects of treatment were investigated using different test methods. Tegewa test was used to evaluate the quantity of removed starch from the samples mercerized under different conditions. The changes in the samples surface structure because of treatment conditions were compared using electron microscopy. In addition, alkali treatments were studied with respect to fabrics performance under tested conditions of dye adsorption of the samples. The results indicate that there is an increase in the amount of starch removal due to increases in mercerization temperature with more effective removal from non-tension slack-mercerized fabrics as compared with those of slack-mercerized fabrics under tension. The obtained results also revealed that the increase in dye uptake was related to joint effects of temperature and alkali concentration in mercerization process.