Dyeing performance of wool fabric with natural pigment from Cordyceps militaris

Abstract

AbstractAs a sustainable and ecological dye resource, the biomass materials are receiving more and more attention. In this work, the pigments in Cordyceps militaris were extracted and applied for dyeing wool fabrics, and the various properties were investigated. The extracted pigments and dyed wool fibers were analyzed and characterized by ultraviolet–visible (UV-Vis) spectroscopy, Liquid Chromatography-Mass Spectrometry (LC-MS) and Fourier Transform Infrared (FTIR) spectroscopy. The single-factor experiments were used to screen and optimize the dyeing process. Six metal mordants with different use order were compared with each other, and their possible mordanting mechanisms were proposed. The color fastnesses, UV resistance and antioxidant properties were evaluated after dyeing. The results showed that UV-Vis, LC-MS and FTIR analysis confirmed that the main components of C. militaris extract was lutein. The optimal dyeing process for the extract was as follows: dyestuff mass 200% (o.m.f.), dyeing temperature 90 °C, dyeing time 45 min, bath pH 5.0, Na2SO4 mass 0 g/L. Metal ions are added to form chelate bonds between the dyes and the fibers, further improving the color fastness. The dyed fabric exhibits excellent UV resistance and its UPF (Ultraviolet Protection Factor) value increases with the color yield. Meanwhile, the dyed wool fabric could exhibit up to 94.77% antioxidant activity. These results provide new insight for the application of C. militaris pigments on wool fabric.Keywords: Cordyceps militariswool fabricluteinmordant dyeingUV resistance AcknowledgmentsThe authors are grateful to the College of Chemistry and Chemical Engineering of WTU and the College of Textiles and Apparel of QNU for providing lab facility.Disclosure statementThe authors have no conflict of interest regarding publishing the article.Additional informationFundingThis research was funded by the Fujian Provincial Natural Science Foundation Projects Program (No.2019J01741), State Key Laboratory of New Textile Materials and Advanced Processing Technology (No. FZ2020014).