Dope-Dyeing of Polyvinyl Alcohol (PVA) Nanofibres with Remazol Yellow FG

Abstract

The lack of aesthetic properties of electrospun nanofibres in terms of colour appearance is the drive in this preliminary study. This research is conducted to study the dyeing behaviour and colorimetric properties of electrospun nanofibres blended with Remazol Yellow FG reactive dye using dope-dyeing method via electrospinning process. This paper reports the colorimetric properties of dyed poly vinyl alcohol (PVA) nanofibres within the range of 2.5 wt.% to 12.5 wt.% dye content. The electrospinning parameters were fixed at the electrospinning distance of 10 cm, constant feed rate of 0.5 mL/h and applied voltage of 15 kV. The resulting impregnated dye of 10 wt.% exhibits acceptable colour difference of dyed PVA nanofibres, with a mean fibre diameter of 177.1 ± 11.5 nm. The SEM micrographs show the effect of dye content on morphology and fibre diameter upon the increment of dye used. Further increase of dye content adversely affects the jet stability during the electrospinning, resulting in macroscopic dropping phenomenon. The presence of all prominent peaks of Remazol dye in the PVA nanofibers was supported with FTIR analysis. The addition of dye into the nanofibres has resulted in the enhancement of thermal stability of the PVA as demonstrated by TGA analysis.

Effects of Different Doses of Rimazolam on Oxidative Stress Level Sedation Score and Recovery Time of Patients during Hip Replacement

“…(7) The correlation between sedation score and stress index of patients undergoing hip replacement is analyzed. (8) The correlation between sedation score and pain degree of patients undergoing hip replacement is analyzed.…”

“…Rimazolam is a new benzodiazepine designer. This drug is characterized by quick effect, quick recovery and small influence, and can exert sedative effect quickly [ 8 ]. However, the quality of anesthesia induction with different doses of Rimazolam is not uniform, so the selection of appropriate drug dose can greatly improve the stability of circulation in patients during surgery and reduce adverse reactions [ 9 ].…”

Effect of mechanical treatments on orientation behavior and spectral properties of azoderivative dyes incorporated in poly(vinyl alcohol) films

“…Esfahani et al [ ] have prepared red‐BS dye‐doped PVOH and concluded that the red‐BS molecules led to the increase of the absorption coefficient, concomitantly with the decrease of the band gap. More recent research concerning dyed PVOH systems is focused on waveguides, [ 26 ] textile fabrication, [ 27 ] nonlinear optics, [ 28 ] optical limiters, [ 29 ] materials with photoinduced optical anisotropy, [ 30 ] and dye‐sensitized solar cells. [ 31, 32 ] Other important contributions on this subject were made by Dorohoi and collaborators.…”

Improvement of Moisture Management Properties of Face Masks Using Electrospun Nanofiber Filter Insert

“…A syringe pump was used to deliver the polymer solution from a syringe to the needle at a fixed rate of 0.5 ml/hr. The electrospinning setup was described elsewhere [18][19][20].…”