The present study investigates environmentally safe pretreatments for wool fabric to improve its printing with acid and reactive dyes. Wool fabric was pretreated either with activated hydrogen peroxide using tetraacetylethylenediamine or with lipase enzyme under specified conditions. Some acid and reactive dyes were applied for wool printing using normal techniques. These treatments were found to improve the colour intensity of the printed fabrics to a level comparable with those of prechlorinated wool fabrics.
An acid dyeable acrylic fabric has been obtained by the pretreatment with cationic aqueous polyurethane, containing different amounts of quaternary nitrogen. Cationic polyurethane has the ability to interact with the carboxylic groups in the acrylic fabrics, as well as providing basic sites suitable for acid dyeing. The prepared polyurethane has been identified with FTIR, and the effect of the pretreatment conditions on the dyeability and printability of the fabrics has been investigated. The color strength values and the fastness properties of the dyed and printed samples, reveal the ionic interaction between the sulphonic groups in the acid dye molecules and the quaternary nitrogen on the fabrics.
P ROPOLIS is a gum has been used as a traditional cure for various diseases due to a variety of biological activities of this folk medicine. In the present work, an attempt made to investigate antibacterial printed cotton fabrics using different concentrations of propolis inside printing paste formulation. The interaction between printing paste containing propolis and cotton was confirmed using FTIR. Morphological properties and printing pigment distribution were examined using SEM. Printing color strength and fastness properties were examined. Antibacterial activity was explored against gram positive, negative and yeast. ATR/IR showed different intensities at OH region that confirm interaction between propolis and fabrics and in comparison with fabric and printed cotton without propolis. Thick coating and highly distributed fabrics were visualized at SEM images at printed cotton fabrics containing propolis. The color strength of printed cotton fabrics containing propolis was directly proportional with propolis content up to 4%. Printed cotton fabrics containing propolis showed stability at all fastness evaluations. Printed cotton fabrics containing 4% propolis showed efficient antimicrobial activity towards both gram positive and negative bacteria
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