Green Coloration of Polyester Fabric through Auxiliary-Free Dyeing with Syzygium samarangense Leaf Extract

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Document Type : Original Article

Authors

Department of Textile Engineering, Uttara University, P.O. Box: 1230, Dhaka, Bangladesh.

Abstract

With the increasing demand for sustainable textile processing, plant-based colorants have emerged as promising alternatives to conventional synthetic dyes due to their renewable nature, biodegradability, and lower environmental impact. This study demonstrates auxiliary-free dyeing of 100% polyester fabric using Syzygium samarangense leaf extract as a bio-based dye, achieving satisfactory coloration and fastness properties. The present study explores the dyeing potential of Syzygium samarangense leaf extract, a tannin-rich natural resource for the coloration of 100% polyester fabric. The dyeing process was conducted using the exhaust method at 80 °C, 90 °C, and 100 °C for 60 minutes. The colorimetric evaluation revealed K/S values of 1.2, 1.3, and 1.1, indicating that dye uptake was most favorable at 90 °C. FTIR analysis confirmed that the Syzygium samarangense leaf extract adhered to the polyester surface through possible hydrogen bonding, enabling effective coloration even in the absence of auxiliaries. The dyed fabrics exhibited acceptable fastness properties to wash, light, perspiration, and rubbing. The findings suggest that Syzygium samarangense leaf extract offers a promising, sustainable route for auxiliary-free dyeing of polyester fabrics, aligning with the global drive toward greener textile processing.

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Main Subjects

Progress in Color, Colorants and Coatings

Articles in Press, Accepted Manuscript
Available Online from 12 June 2026

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