A dye–fibre system from food waste: Dyeing casein fibres with anthocyanins / Richard S. Blackburn in COLORATION TECHNOLOGY, Vol. 140, N° 3 (06/2024)  

[article]  inCOLORATION TECHNOLOGY > Vol. 140, N° 3 (06/2024) . - p. 393-402 Titre : A dye–fibre system from food waste: Dyeing casein fibres with anthocyanins Type de document : texte imprimé Auteurs : Richard S. Blackburn, Auteur ; Joseph A. Houghton, Auteur ; Marie Stenton, Auteur ; Alenka Tidder, Auteur Année de publication : 2024 Article en page(s) : p. 393-402 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Aliments -- Déchets Anthocyanes Cassis et constituants Colorants végétaux Colorimétrie Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Fibres de caséine Recyclage (déchets, etc.) Résistance au lavage Teinture -- Fibres textiles synthétiques Textiles et tissus multifibres Index. décimale : 667.3 Teinture et impression des tissus Résumé : Regenerated protein fibres manufactured from food side-streams offer significant potential as circular and sustainable fibres, but greater knowledge of their dyeing properties is required. In this research, coloration of casein fibres with dyes also extracted from blackcurrant skins left over from juice pressing is explored. Casein fibre was dyed with blackcurrant extract, rich in anthocyanins, from pH 2 to pH 6 and from 40 to 80°C, with and without alum. Casein fibres could be dyed with blackcurrant extract across all conditions tested, and under optimal conditions, dyeing is achieved with medium depths of colour with good wash fastness. Highest sorption of anthocyanins onto casein is observed at pH 4, where anthocyanins are a mixture of 60% neutral purple quinonoidal base form and 40% flavylium cation form; under these conditions dye–fibre interaction is optimal. At pH 2, casein fibre has a highly positively charged surface and anthocyanin is in the flavylium cation form, leading to some dye–fibre repulsion. At pH 6, the slightly negatively charged casein fibre demonstrates lower sorption of the mixture of 40% purple quinonoidal base form and 60% the anionic quinonoidal base form, again leading to some dye–fibre repulsion. Presence of alum in the dyebath enhances sorption of anthocyanins onto fibre at pH 4 due to formation of Al–anthocyanin complexes. Wash fastness of the dyeings is better as pH increases and as temperature increases. Note de contenu : - Material - Dyeing process - Wash fastness testing - Colour measurement Table 1 : Summary of charge of model protein and form of anthocyanin with varying pH values - Table 2 : Colour change values for casein fibre dyed with blackcurrant extract powder (with varying, pH, temperature and inclusion of alum) following wash fastness testing - Table 3 : Grey scale staining ratings for transfer to cotton portion of Multifibre DW fabric from casein fibre dyed with blackcurrant extract powder (with varying, pH, temperature and inclusion of alum) following wash fastness testing DOI : https://doi.org/10.1111/cote.12718 En ligne : https://drive.google.com/file/d/1RJLVk0to_mDVVYuwsOeWzJwXpJu0Z_ov/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40957 [article]

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