lead to an increase in the solvent evaporation rate and consequently enhance the ha polymer chain stretching during the electro blowing spinning process because the ha solution concentration could not be prepared at high enough concentrations due to its very high solution viscosity with the solvent being evaporated the entangled polymer chains at high enough concentrations could be stretched during its transit from the spinneret to the ground however at a rapid evaporation rate of the solvent and with the solution concentration becoming even higher the stretching phase should be over very soon and the polymer chains could no longer be drawn further i e corresponding to a reduction in the spin draw ratio resulting in an increase in the fiber diameter thus the air flowing rate and the air temperature can play multiple roles in controlling the fiber formation accordingly the control of membrane quality can be tuned by using these additional parameters coming from the blowing process it is assumed that the elongation effect is predominant until about 100 ft 3 hr various concentrations of ha solutions in acidic condition were prepared and electro blown by flowing 57 u00b0 c hot air at 70 ft 3 hr of air flow rate the optimum conditions for electro spinning of ha were carried over the results were used to elucidate the effects of ha concentration on the morphology of electro blown ha.