Production of an Esterquat-Based Novel Softening Agent and Its Impact on Leather and Textile Quality

This study focuses on the development of an esterquat-based cationic softening emulsion for use in leather and textile applications. Esterquats, known for their excellent biodegradability and softening properties, were formulated into oil-in-water emulsions and applied to both chrome-tanned leather and cotton-polyester textiles. The stability of the emulsion was confirmed through particle size and zeta potential analyses. The emulsion was applied to chrome-tanned leather at concentrations ranging from 0.5 to 4%, followed by assessments of tensile strength, tear resistance, and water repellence. Additionally, the emulsion's effect on dye uptake was evaluated using UV-spectrophotometer analysis, with results showing up to 88.98% dyestuff exhaustion at 4% emulsion concentration. Antibacterial efficacy against Escherichia coli and Staphylococcus aureus was also tested, revealing reductions up to 57.83 and 79.46%, respectively. For textile applications, the emulsion was applied to cotton and polyester fabrics via the exhaust method, followed by drying and curing. Softening power was assessed using a panel feel test with significant improvements observed, particularly on cotton fabrics. These findings suggest that esterquat-based emulsions offer a promising, eco-friendly alternative for improving the physical and functional properties of leather and textiles.