Colour management in circular economy: decolourization of cotton waste

Marjo Määttänen, Sari Asikainen, Taina Kampuri, Elina Ilen, Kirsi Niinimäki, Marjaana Tanttu, Ali Harlin

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

1 Sitaatiot (Scopus)
139 Lataukset (Pure)


Purpose – While aiming to create methods for fibre recycling, the question of colours in waste textiles is also in focus; whether the colour should be kept or should be removed while recycling textile fibre. More knowledge is needed for colour management in a circular economy approach.
Design/methodology/approach – The research included the use of different dye types in a cotton dyeing process, the process for decolourizing and the results. Two reactive dyes, two directdyes and one vat dye were used in the study. Four chemical treatment sequences were used to evaluate colour removal from the dyed cotton fabrics, namely, HCE-A, HCE-P-A, HCE-Z-P-A and HCE-Y-A.
Findings – The objective was to evaluate how different chemical refining sequences remove colour from direct, reactive and vat dyed cotton fabrics, and how they in fluence the specific cellulose properties. Dyeing methods and the used refining sequences in fluence the degree of colour removal. The highest achieved final brightness of refined cotton materials were between 71 and 91 per cent ISO brightness, depending on the dyeing method used.
JulkaisuResearch Journal of Textile and Apparel
DOI - pysyväislinkit
TilaJulkaistu - 29 toukokuuta 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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