نوع مقاله : مقاله پژوهشی
نویسنده
استادیار، گروه فرش،دانشکده هنرهای کاربردی، دانشگاه هنر شیراز، شیراز، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسنده [English]
In this research, the colorimetric characteristics and antibacterial properties of two herbal dyes, oak bark (Jaft) and henna, were compared and evaluated on silk yarn. These dyes, which are widely used to provide red-brown shades in handwoven carpets, are used in traditional medicine, due to the presence of plant secondary metabolites. On the other hand, the surface of textiles with natural fibers, including handwoven carpets, in the presence of moisture and heat, is exposed to the growth and proliferation of bacteria and leads to problems in the durability, appearance and health of the goods. In this research, in addition to evaluating colorimetric parameters (a*, b*, L*), color strength (K/S), general fastness of dyed wool by aqueous and alcoholic extracts of henna and jaft, their antibacterial effect on two Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli bacteria was also compared. Dyeing was performed using the simultaneous mordanting method in the presence of potassium aluminum double sulfate. Spectrophotometric evaluation proved that both dyes produced red and yellow tones, with a slight color difference, and the ethanolic extract had the highest color strength on the fibers in both dyes in this research. The results of antibacterial test showed that both types of dyes showed an acceptable bacteria growth inhibition percentage against Escherichia coli and Staphylococcus aureus bacteria, and among them, the ethanolic extracts showed a higher antibacterial power against bacteria due to the presence of higher amounts of Lawson and Quercetin active ingredients.
کلیدواژهها [English]