Electrospinning dependence

The surface tension seems more likely to be a function of solvent compositions, but is negligibly dependent on the solution concentration. Different solvents may contribute different surface tensions. However, not necessarily a lower surface tension of a solvent will always be more suitable for electrospinning. Generally, surface tension determines the upper and lower boundaries of electrospinning window if all other variables are held constant. The formation of droplets, bead and fibers can be driven by the surface tension of solution and lower surface tension of the spinning solution helps electrospinning to occur at lower electric field [57],... 

PF nanofibers are a second example of a top-down nanostructure. These fibers are conveniently prepared by electrospinning [143,144], a technique applied to PFs in work by Chen et al. [145] and Jenekhe et al. [146]. An example of PF8 nanofibers is shown in Fig. 34. In this study various different PFs were blended with PMMA and depending on the molar ratio and mother solution used, either uniform or core-shell structures were obtained. PF ag-... 

In the present study, CCD was employed to establish relationships between four electrospinning parameters and two responses including the AFD and the CA of elec-trospun Cber mat. The experiment was performed for at least three levels of each factor to Dt a quadratic model. Based on preliminary experiments, polymer solution concentration (X ), applied voltage (X ), tip to collector distance (X ), and volume dw rate (X ) were determined as critical factors with signiCbance effect on AFD and C A of electrospun Cber mat. These factors were fom independent variables and chosen equally spaced, while the AFD and the CA of electrospun Cber mat were dependent variables (responses). The values of -1, 0, and 1 are coded variables corresponding to low, intermediate, and high levels of each factor respectively. The experimental parameters and their levels for four independent variables are shown in Table 1. 

For the electrospinning process to be initiated, the solution must gain sufficient charges such that the repulsive forces within the solution are able to overcome the surface tension of the solution. Subsequent stretching or drawing of the electrospinning jet is also dependent on the ability of the solution to carry charges. 

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