Deep Eutectic Solvent Dyeing of Cellulose Acetate Nanofibers With Disperse Dyes: Kinetics, Isotherm and Thermodynamic Studies

Deep Eutectic Solvents (DES) was introduced more than a decade ago and has been used in variety of applications based on their unique chemical and physical properties. Recently, they have shown a considerable attention in various sectors including nanotechnology because they have distinctive features as “New green solvents”. Within this scope of work, we introduced choline chloride (CC) as a DES which is nontoxic, inexpensive and has tendency to improve color yield properties of disperse dyes on the nanofibers membrane. Cellulose acetate nanofibers (CANF) were electrospun and dyed with Color Index Disperse Red 277, Color Index Disperse Blue 165:1, and Color Index Disperse Yellow 211 in Choline chloride:Ethylene glycol (CC:EG) media and Choline chloride:Urea (CC:Urea) media by using high-temperature exhaust method. Results revealed that dyeing of CANF by CC:EG media has good color fixation properties than CC:Urea media. The dyed samples were characterized by FTIR and SEM. Further, the thermodynamic, standard affinities, and kinetic parameters have also been analyzed. The proposed dyeing of CANF with DES showed excellent calorimetric properties within a short interval of time as compared to conventional dyeing process.