Winery wastes: a potential source of natural dyes for textiles
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B. Lagoa [1] ; L. Campos [1] ; T. Silva [1] ; M.J. Moreira [1] ; L.M. Castro [1] ; A.C. Veloso [1] ; M.N. Coelho Pinheiro [1]
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[1] Instituto Superior de Engenharia de Coimbra
Instituto Superior de Engenharia de Coimbra
Portugal
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- Localización: Wastes: solutions, treatments and opportunities III / Cândida Vilarinho (dir.), Fernando Castro (dir.), Margarida Gonçalves Neto (dir.), Ana Luísa Fernando (dir.), 2020, ISBN 9780367257774, págs. 69-74
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
The main goal of the present study was to explore textile dyeing ability of colorants extracted from winery wastes. Extractions with water at different pH and with a water/ethanol solution were performed. Cotton (natural and with a cationization pre-treatment) and wool were used in the dyeing process with two different time duration (100 and 200 min). The colorimetric and fastness properties, in terms of washing (with hot and cold water) and natural light exposure, were evaluated and the cationized cotton substrate was the one with the highest values of ΔE* (parameter representing the difference in color for the fabric after and before dyeing) for all the conditions used to obtain the pomace grape extracts. Hue and tones obtained in the fabrics resulted in uniform colors going from the gray to brownish-gray with potential commercial acceptation, showing that the eco-valorization proposed for grape pomace wastes deserves further studies.
