Bicomponent regenerated cellulose fibres: retaining the colour from waste cotton textiles

Abstract Bicomponent regenerated cellulose fibres (bRCF) have been created in a core–shell configuration from waste textiles. Textile dyeing and colouration is known to be major contributor the environmental impact of producing textiles this needs addressed for become more sustainable. Coloration bRCF here was achieved by utilizing coloured textile shell component whilst using white cotton core. The core extrusion speed thus diameter were varied optimised colour strength. made up 49.6% dyed material yet able achieve same strength as single fibre (RCF). potential benefit approach reduced amount required these recycled without any sacrifice intensity. mechanical properties similar RCF with tensile strengths 115–116 MPa maximum elongations 15.2–17.5%. morphology fibres, while optical micrographs showed discrete structure bRCF. This manuscript details properties, dye savings spinning approach.