Dyeing and antibacterial properties of aqueous extracts from quince (Cydonia oblonga) leaves

Autor: Cristina Rîmbu, Emil Ioan Muresan, Angela Cerempei, C. Carp-Cărare, Nicanor Cimpoesu
Rok vydání: 2016
Předmět:
Zdroj: Industrial Crops and Products. 94:216-225
ISSN: 0926-6690
DOI: 10.1016/j.indcrop.2016.08.018
Popis: In this study was reported a novel application of using vegetable waste such as fall quince leaves for wool fibers dyeing. Natural dye obtained by aqueous extraction of quince leaves ( Cydonia oblonga ) was applied to a wool fibers by an exhaustion dyeing process. Effect of extraction temperature on UV–vis absorbance of the extracted liquor was studied. Zinc chloride and silver nitrate were used as mordants. The dyeing process was conducted with and without metallic salts, using post-mordanting method. The fastness properties and color parameters of the dyed wool samples were determined. The antimicrobial activity of dyed and post-mordanting wool fibers was also evaluated. Dyeings with aqueous extracts of fall quince leaves have moderate to very good fastness properties. Mordanting with silver nitrate result in significant improvement in light fastness. The best results were achieved when dyeing was conducted with quince leave extracted at 100 °C. Wool fibers dyed with mordant had a darker reddish-brown shades than those dyed without mordant. However, darker shade was obtained with silver nitrate mordant. Dyed and post-mordanting samples with silver nitrate have a good antibacterial activity against Gram-negative and Gram-positive bacteria. It was found from the study that the dye extracts from fall quince leaves can be successfully used for dyeing of wool materials to obtain a wide range of shades from light beige to reddish-brown. “Green waste” obtained from forest and garden residues could be used as valuable resource of natural dyes and bioactive compounds.
Databáze: OpenAIRE