A Note on the Dyeing of Wool Fabrics Using Natural Dyes Extracted from Rotten Wood-Inhabiting Fungi

Abstract

Fungal isolates obtained from rotten wood samples were identified and selected by their ability to produce fungal dyes in liquid media. Fungal isolates produced natural extracellular dyes with colors ranging from red to orange, yellow and purple. Dyes from two of these fungi, Talaromyces australis (red) and Penicillium murcianum (yellow), were extracted and used to dye wool samples in a Data Color Ahiba IR Pro-Trade (model Top Speed II) machine. The protein nature of wool interacted well with the fungal dyes producing colors suitable for textile applications when used to a concentration of 0.1 g•L −1. Results on color fastness when washing confirmed the affinity of the dyes with wool as the dyed samples kept their color in acceptable ranges after washing, without the implementation of mordanting pretreatments or the use of fixing agents.

Isolation and characterization of pigment producing fungi

“…Furthermore, Talaromyces australis, Penicillium murcianum, Talaromyces sp., Trichoderma spirale, and Fusarium oxysporum, were recorded for various natural pigments production when grown in liquid media. [47] The produced pigments by filamentous fungi are secondary metabolites whose production usually commences late in the growth of the microorganisms, especially when entering the stationary phase [48].…”

“…4). Interestingly, it was stated that, filamentous fungi have ability to produce a range of pigments that varied from yellow, to red, orange and purple [39,47,49]. These pigments are produced as extracellular metabolites [50], and are preferred to study and investigate because of their solubility in culture media, and consequently, ease and low cost of downstream processing .…”

Colorants Produced by Penicillium murcianum Are a Natural Moldicide against Trichoderma and Other Penicillium Species

“…logs from central and southern Chile and isolated by the Hernandez lab in 2018. The extraction and quantification of the colorants followed protocols developed for textile dye production [19,28,36], i.e., cultivation in liquid media, followed by liquid/liquid extraction and drying to a powdered product. The colorants were re-solubilized to the five concentrations used in this study.…”

Surface Functionalization of Wool via Microbial-Transglutaminase as Bio-Mordant to Improve Dyeability with Madder in the Presence of Alum

“…Recent developments in dyeing and the requirements of the market encourage using natural dyes in the textile industry. Natural dyes have been attracting considerable attention to themselves due to their uncommon soft, lustrous, and soothing shades, which are pleasing to the human eye, being eco-friendly, producing a unique and harmonizing color, being renewable, and biodegradable [1][2][3][4][5][6][7][8][9]. Despite the mentioned advantages, there are some problems, such as limited access to natural dyes, low color efficiency, long dyeing time, low fastness, and costly mordanting process.…”