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- 저자 : Rajat Kumar Baldua (검색결과 1 건)
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Banana Pseudostem Sap as a Biomordant for Dyeing of Silk with Celosia Flower
Shyam Barahapurkar,Roli Purwar,Rajat Kumar Baldua 한국섬유공학회 2020 Fibers and polymers Vol.21 No.9
This research paper is focused on the dyeing of silk fabrics with a natural dye extracted from Celosia flower andbanana pseudostem sap as a biomordant. The dyeing process was carried out by three different techniques i.e. pre-, post-, andsimultaneous mordanting method. The effect of dyeing process parameters namely mordant concentration, pH, andtemperature on the dye absorption and fastness properties of dyed silk fabric have been investigated for each dyeing method. Optimal values of dyeing process parameters have been categorized based on the highest value of dye absorption in terms ofK/S value. Optimum mordant concentration was found to be 18 % for all sets of dyeing methods. The optimum pH wasexamined to be 4.5, 4.0, and 4.0 and dyeing temperature was 70 °C, 70 °C, and 65 °C for the pre-, post-, and simultaneousmordanting dyeing methods, respectively. The color fastness to light, washing, and rubbing of dyed silk fabrics wasinvestigated. Fastness values of light and rubbing showed fair-to-good fastness level, whereas the color fastness to washingwas found to be good to very good. The antibacterial activity of the banana sap mordanted and simultaneously dyed silkfabrics was evaluated. The dyed silk fabric exhibited moderate antibacterial activity against gram-positive and gram-negativebacteria.
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