{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,14]],"date-time":"2026-07-14T04:01:41Z","timestamp":1784001701371,"version":"3.55.0"},"reference-count":40,"publisher":"The Royal Society","issue":"11","license":[{"start":{"date-parts":[[2025,11,1]],"date-time":"2025-11-01T00:00:00Z","timestamp":1761955200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2025,11,1]],"date-time":"2025-11-01T00:00:00Z","timestamp":1761955200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["royalsocietypublishing.org"],"crossmark-restriction":true},"short-container-title":["R. Soc. Open Sci."],"published-print":{"date-parts":[[2025,11]]},"abstract":"<jats:p>\n                    Pineapple (\n                    <jats:italic toggle=\"yes\">Ananas comosus<\/jats:italic>\n                    ) 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\u2013water 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\u00b0C and 2 h extraction time, yielding 35\u201340% colourant, significantly outperforming organic solvents (&lt;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\u00b0C, while particle size analysis showed a mean size of 266 nm, enabling effective fibre penetration. Quantitative dyeing evaluation demonstrated 43.05% exhaustion, 27.76% total fixation efficiency and 0.64 fixation ratio. Colorimetric analysis revealed significant mordant-dependent variations, with tannic acid achieving superior colour strength (\n                    <jats:italic toggle=\"yes\">K<\/jats:italic>\n                    \/\n                    <jats:italic toggle=\"yes\">S<\/jats:italic>\n                    = 21.4) compared to metallic mordants: zinc sulfate, alum and ammonium ferrous sulfate. CIELab coordinates confirmed successful dye uptake (\n                    <jats:italic toggle=\"yes\">L<\/jats:italic>\n                    * = \u22126.92 to \u221212.83). Post-mordanting with zinc sulfate achieved excellent fastness properties: wash (4\u20135), light (4) and rubbing (4) fastness. Cationization minimized electrostatic repulsion between cotton and anionic dye molecules, enhancing dye absorption. The findings demonstrate pineapple peel waste viability as a cost-effective natural dye with quantified performance metrics supporting commercial feasibility and circular economy principles in sustainable textile manufacturing.\n                  <\/jats:p>","DOI":"10.1098\/rsos.251200","type":"journal-article","created":{"date-parts":[[2025,11,26]],"date-time":"2025-11-26T00:06:23Z","timestamp":1764115583000},"update-policy":"https:\/\/doi.org\/10.1098\/crossmark-policy","source":"Crossref","is-referenced-by-count":2,"title":["Eco-innovative dyeing of cotton with upcycled pineapple peel waste-derived natural dye"],"prefix":"10.1098","volume":"12","author":[{"given":"Kasindu","family":"Pramod","sequence":"first","affiliation":[{"name":"Sri Lanka Institute of Nanotechnology, Nanotechnology &amp; Science Park Mahenwatta, Pitipana, Homagama 10200, Sri Lanka"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gayara","family":"Perera","sequence":"additional","affiliation":[{"name":"Sri Lanka Institute of Nanotechnology, Nanotechnology &amp; Science Park Mahenwatta, Pitipana, Homagama 10200, Sri Lanka"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nethmini","family":"Wijesundara","sequence":"additional","affiliation":[{"name":"Department of Physical Sciences & Technology, Faculty of Applied Sciences, Sabaragamuwa University of Sri Lanka","place":["PO Box 02, Belihuloya, Sri Lanka"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7927-6170","authenticated-orcid":true,"given":"Nuwan","family":"De Silva","sequence":"additional","affiliation":[{"name":"Sri Lanka Institute of Nanotechnology, Nanotechnology &amp; Science Park Mahenwatta, Pitipana, Homagama 10200, Sri Lanka"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"175","published-online":{"date-parts":[[2025,11,26]]},"reference":[{"key":"e_1_3_7_2_2","first-page":"25","article-title":"A valuable observation of eco-friendly natural dyes for valuable utilisation in the textile industry","volume":"19","author":"Ebrahim S","year":"2021","unstructured":"Ebrahim S, Mosaad M, Othman H, Hassabo A. 2021 A valuable observation of eco-friendly natural dyes for valuable utilisation in the textile industry. 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