Modeling and Optimization of Colloidal Nanosilver Pretreatment on Acid-Free Dyeing, Antibacterial, and Hydrophilicity of Polyamide-۶,۶ Using Response Surface Methodology

Enhancement of dyeability, antibacterial, andhydrophilicity of polyamide-۶,۶ was introduced with colloidalsilver nanoparticles (CSNs) and butane tetra carboxylic acid(BTCA) using cubic statistical models. Different concentrationsof CSNs and BTCA were investigated to evaluate theirinfluences on dyeability, antibacterial, hydrophilicity, andcolor change properties of polyamide-۶,۶ fabric by applyingstatistical design of D-optimal method. Antibacterial propertyof treated sample was tested by Gram-negative bacteriumEscherichia coli and Gram-positive bacterium Staphylococcusaureus. To achieve optimum conditions for polyamide-۶,۶,response surface methodology was also utilized. Here, CSNswere stabilized on polyamide-۶,۶ surface using BTCA ascrosslinking agent in order to enhance washing durability.Scanning electron microscopy and energy-dispersivespectroscopy were employed to characterize presence of CSNson surface of polyamide-۶,۶ and elemental composition oftreated polyamide-۶,۶ fabrics. Treatment optimization led toconsiderably absorption enhancement of C.I. Acid Red ۸۱ dyethrough cubic statistical models on polyamide-۶,۶ surfaces aswell as antibacterial and hydrophilicity characteristics andminimized color change caused due to CSNs influence. Theprincipal result is synergetic effect utilizing BTCA accompanywith CSNs on enhancing and durability of mentionedproperties quantitatively in optimized conditions. Overall,the suggested method could be introduced as a new route,disclosing various desirable multifunctional characteristics topolyamide-۶,۶ fabric.