ررسي رنگرزي پارچه پنبه اي با رنگينه هاي راكتيو در حلال مايع يوني

Dyeing of cellulosic fibers through conventional aqueous methods faces problems such as high water an‎d energy consumption, wastewater pollution, an‎d low dye fixation yield. In this study, aiming to introduce an alternative an‎d sustainable method, 2-hydroxyethylammonium nitrate ionic liquid was synthesized an‎d used as the dyeing medium. The structural confirmation of this compound was performed using Fourier-transform infrared spectroscopy (FTIR) an‎d nuclear magnetic resonance spectroscopy (NMR). To eva‎luate the effect of the ionic liquid on the dyeing process, cotton fabrics were dyed under various temperature conditions, followed by analytical tests. These analyses included measurement of reflectance an‎d colorimetric data, X-ray diffraction (XRD) for investigating fiber structural changes, scanning electron microscopy (SEM) an‎d energy-dispersive X-ray spectroscopy (EDX) for surface an‎d elemental analysis, an‎d FTIR spectroscopy to assess chemical changes after dyeing. The FTIR results revealed that the absorption region of –OH groups (3200–3400 cm⁻¹) in the aqueous sample exhibited stronger intensity, indicating more efficient removal of surface components, while in the ionic liquid–treated sample, a uniform decrease in the intensities of –OH, C–H, an‎d C–O–C ban‎ds indicated the persistence of ionic interactions an‎d slight alterations in the cellulose structure. The relative reduction of the C–O–C ban‎d also suggested limited disruption of glycosidic linkages an‎d crystalline order within the fibers. These structural modifications ultimately influenced the dye uptake an‎d fixation performance, thereby controlling the dyeing behavior under various conditions. This approach can serve as a foundation for developing environmentally friendly an‎d energy-efficient dyeing methods in the textile industry.

حسين ايزدان , محمد ديناري

فرزانه علي حسيني , حسن محمدي