Title : Ultrasonic-assisted extraction & application of bio-colorant from neem bark (azadirachta indica) for green mordanted wool fabric
Abstract:
Green products are rapidly gaining a place in walks of life due to the toxic & hazardous effects of their synthetic counterparts. Among green products, natural dyes are considered one of the sustainable, eco-friendly, and eco-labeled products for all fields. This study explores reddish-brown natural dye (tannin) from neem bark for wool dyeing under ultrasonic treatment. The extract and fabric were treated with US waves for up to 60 min. It has been found that 20 mL of extract (4pH) obtained from 4g of powder has given excellent color yield onto fabric when employed under US treatment for 15 min. Scanned images by SEM & spectra by FTIR of fabric show that the surface has been tunned enough physically without any chemical change to sorb colorant up to the maximum extent at selected conditions. During the shade development process, it has been found that 3% of tannic acid before and during dyeing and 1% of tannic acid after dyeing has developed colorfast shades. In comparison, 7% of turmeric as pre-bio-mordant, 3% after dyeing, and 5% turmeric during dyeing have developed colorfast shades. Ultrasonic waves are recommended to be effective in exploring dyeing-yielding plants for fabric dyeing under mild conditions. In contrast, bio-mordants should be included to make the dyeing process colorfast, green, & global friendly.
Audience take away:
- The students, academician and stakeholder s who love to use natural dyes in their fields
- The traditional art lover, cultural heritage for using Plant derived dyes in textiles, fashion cosmetics
- This is new emerging field, where the chances to create human resource, low level house or domestic job to produce dyed products
- Utilization of waste plant materials for useful work.
- For environmentalist to give awareness to use pollution free products
