Effectsof natural and synthetic mordants on dyeing of Jute/Cotton yarn with Sustainable Allium Cepa
Md. Raijul Islam, Prof. Dr. Engr. Ayub Nabi Khan, Prof. Dr. Engr. Abu Bakr Siddique, Md. Tarik Hossain, Rois Uddin Mahmud, Maisha Atiq, Md. Zahidul Hasan
Email: raijul@buft.edu.bd
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Abstract
The coloration of juton yarn, which itself is constructed of 65% jute and 35% cotton, is achieved by using the abundant and sustainable onion peel extracted dye. The red onion skin is extracted using the Soxhlet method. Guava leaves (extraction by immersion method) and potash alum (aqueous solution) were used to fix the natural dyes into the fibers. The coloring was wiped out by three mordanting processes (Pre, Post and meta mordanting). The dyed samples were tested and evaluated for color fastness (i.e., laundering and rubbing) and parameters of colorimetry (CIE lab and K/s values) and the determination of the functional group; transmittance is done through FTIR. The colorfastness properties of alum mordant are better than guava mordant; for both rubbing and laundering. Yarn dyed using alum mordant shows higher shade depth as well as color values. The FTIR graph does not represent any significant change in bond formation on cellulosic fiber. Hence, the eco-friendly common color extracted from the waste onion peel and potash alum mordant can be an alluring choice for passing on the juton yarn with different exquisite shades.