Eco-innovative dyeing of cotton with upcycled pineapple peel waste-derived natural dye
Kasindu Pramod, Gayara Perera, Nethmini Wijesundara, Nuwan De Silva
TL;DR
This paper explores using pineapple peel waste as a natural dye for cotton, finding it effective and sustainable.
Contribution
The study introduces an optimized alkaline extraction method for dyeing cotton with pineapple peel waste.
Findings
Alkaline extraction yielded 35–40% colorant, outperforming organic solvents.
Tannic acid mordant achieved the highest color strength compared to metallic mordants.
Dyeing with pineapple peel waste showed good fastness properties and fiber penetration.
Abstract
Pineapple (Ananas comosus) peel, an abundant agro-industrial by-product, offers significant potential as a sustainable natural dye for textile applications. This study optimized colourant extraction using an alkaline–water system and evaluated dyeing performance on cotton fabrics. Statistical optimization through four-factor linear regression identified optimal conditions: mass-to-liquid ratio of 1 : 10, 12% NaOH, 80°C and 2 h extraction time, yielding 35–40% colourant, significantly outperforming organic solvents (<1%). High-performance liquid chromatography analysis revealed distinctive polyphenolic profiles between alkaline and water extraction methods, demonstrating altered compound distribution and enhanced extraction efficiency under alkaline conditions. Thermogravimetric analysis revealed dye stability up to 160°C, while particle size analysis showed a mean size of 266 nm,…
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Taxonomy
TopicsDyeing and Modifying Textile Fibers · Adsorption and biosorption for pollutant removal · Pineapple and bromelain studies