Pages 424–427
Abstract
Research summary supplied by the authors
The softness of leather is strongly influenced by the fatliquor, which is typically produced through the chemical modification of oils and applied as a surfactant-based emulsion. This study presents a novel fatliquoring formulation that incorporates a discarded industrial by-product in the form of a cyclodextrinbased inclusion compound. This compound is integrated into a fatliquoring system to deliver not only effective fiber lubrication but also enhanced electrical conductivity in crust leather. Anacardic acid, containing both phenolic and long-chain fatty acid groups, forms a hydrophilic and stable inclusion complex upon association with cyclodextrin. This complex functions as an efficient fatliquor with improved emulsion stability, superior penetration into the collagen matrix, and uniform fiber lubrication, as demonstrated through physicochemical analyses. Leathers treated with the new formulation exhibited marked improvements in softness, tensile strength, tear resistance, and—most notably—consistent conductive behaviour, all achieved without compromising mechanical performance. Additionally, the posttanning effluent displayed a positive regulatory effect on plant growth. This innovation offers dual benefits: the valorization of low-value industrial waste and the development of functional conductive crust leathers suitable for emerging smart-material and technical applications. The findings highlight the promise of inclusion chemistry as a sustainable approach for converting industrial residues into high-performance materials for the leather sector.