Cotton fabrics were modified using acrylamide as the aminating agent in the presence of potassium peroxodisulphate (K 2 S 2 O 8 ) as a free radical polymerisation catalyst using a pad-dry-cure technique in order to improve the dyeability of cotton fabrics with natural dyes. Pre-soaking of bleached cotton fabric with 5 g l − 1 K 2 S 2 O 8 and subsequent application of 10 g l − 1 acrylamide monomer on the pre-soaked cotton fabric, followed by drying of the padded fabric at 95 ° C for 5 min and curing of the dried fabric at 140 ° C for 5 min, produced most balanced improvements in dye uptake, tensile strength and wrinkle recovery angle for optimum retention of flexibility of the dyed substrates when pre-treated cotton fabrics were dyed with Camellia sinensis and Punica granatum . Application of ferrous sulphate on pre-treated cotton fabric following a pre-salt application method and subsequently dyeing with Camellia sinensis and Punica granatum improved the depth of shade and all-round colour fastness properties further. Infrared (IR) spectroscopy indicated that the treatment with acrylamide under the influence of K 2 S 2 O 8 led to incorporation of poly(acrylamide) in cotton by the process of graft co-polymerisation using the pad-dry-cure technique.
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