Post covid-transformation of Indian textile & apparel industry

摘要

Aqueous dye solution extracted from roots of Alkanet and Manjista plant was used as an antimicrobial finish/dye due to its bactericidal properties on cotton and polyester/cotton fabrics. The fabric samples were pre mordanted with alum and dyed at 10% (owf) concentration of dye by exhaust method. Antimicrobial activity of cotton and polyester/cotton fabrics finished with natural dyes was estimated by using modified colony counting method (AATCC test method 147-1998). S. aureus (gram positive) ATCC 6538 andE. colt (gram negative) ATCC 11230 were selected as test organisms. Durability of antimicrobial activity to laundering was also discussed. FTIR spectra analysis was carried out to observe functional groups responsible for solubilisation and mordanting power of natural dyes. Colorimetric properties and wash fastness properties of dyed fabrics were assessed. Tensile strength, stiffness and crease recovery properties of untreated and treated fabrics were also measured. The antimicrobial activity of dyed cotton and polyester/cotton fabrics was above 95% for gram positive bacteria and after 10 wash cycles it reduces by 10 to 20%. FTIR spectra analysis confirms the attachment of dye molecules to the fibres. Fabric properties like stiffness, crease recovery and strength are unaffected by the finish/dye applied on test fabrics.