Green development of methyl blue dyed electroactive cellulose fabric
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Date
2022-06
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G,B, Pant University of Agriculture and Technology, Pantnagar, Uttarakhand. PIN - 263145
Abstract
Methyl Blue (MYB) dyed electroactive cellulose fabric has been developed through implication of a series of different green methodologies. In this context cellulose fabric (CFs, 1.0 square inch) has been investigated for dying with methanolic solution of MYB (400 ppm, 200μL) in hot air, microwave irradiation (MW) and supercritical carbon dioxide (SCC) at 70°C over selected periods. Study reveals enhanced potential of SCC towards dyeing of CFs in comparison to MW and hot air. IV characteristics of undyed fabric (CF0) and their respective DFs has shown ohmic behaviour in voltage (V) ranging from 5 to 30 under four probe conditions at 25±10C. All DFs showed comparable σDC (mS/cm) at 1V ranging 0.30 to 0.35 at 25±10C. Increase in voltage to 10V showed no remarkable change in σDC of DFs at 25±10C. CF3 (0.62 mS/cm) and CF4 (0.59mS/cm) showed higher value of σDC over CF1 and CF2 at 100V. KCl (0.1M) at pH 7.0 has shown cyclic stability up to seven scans @ 100 mV/S over glassy carbon electrode (GCE) at 25±1oC. MYB (400 ppm) at pH 7.0, has shown cyclic stability up to ten number of scans @ 100 mV/S over GCE at 25±1oC. Cyclic Voltammetry (CV) reveals redox behaviour of MYB @ 25, 50, 75, and 100 mV/s. Release of MYB from DFs was performed by Square Wave Voltammetry (SWV) in KCl (0.1 M) in potential range -1.20 to 1.00 V. LOD (4.1 x 10-3 mg/L) and LOQ (12.6 x 10-3 mg/L) of MYB were obtained over GCE through SWV in KCl (0.1 M).