Electrospun fibers fiber diameter distributions

Fig. 6.11 Fiber diameter distribution of P(3HB)-50 wt % TiOa fibers electrospun from CHCI3/DMF mixed solvent (ratio = 8 2) at a 15 kV b 20 kV c 25 kV and d 30 kV with an extrusion rate of 40 p.L min ...

Figure 4.10 SEM Images and fiber diameter distribution histogram of electrospun MWCNT/PS fibers with various MWCNT concentrations (a) pure PS and (b) 1% MWCNT/PS. Reprinted from Ref. 14S with permission from SPIE.

The SEM image and fiber diameter distribution of electrospun nanofiber in different volume flow rate are illustrated in Figure 6. It is clear that increasing the volume flow rate cause an increase in average fiber diameter. Ideally, the volume flow rate must be compatible with the amount of solution removed from the tip of the needle. At low volume flow rates, solvent would have sufficient time to evaporate and thinner fibers were produced, but at high volume flow rate, excess amount of solution fed to the tip of needle and thicker fibers result [3,12],... 

FIGURE 11 SEM image and fiber diameter distribution of electrospun fiber mat prepared at optimized conditions. 

FIGURE 3 Atypical (a) SEM image, (b) fiber diameter distribution, and (c) CA of electrospun fiber mat. 

Figure 7.8 Fiber diameter distribution of electrospun silk fibroin nanofiber from SEM image anaiysis. A 19.5% solution of silk in formic acid was used in eiectrospinning. Fiber anaiysis was based on SEM images of the mat. Reproduced with permission from Sukigara (2003). Copyright 2003. Elsevier.

Fiber diameter distribution of the low molecular weight N6,6 electrospun webs. 

Electrospinning process produces very fine fibers and this is one of the very few methods from which fibers of sub-micron size can be produced. So it becomes immensely important to understand the behavior of fiber diameter and fiber diameter distribution in the electrospun web as impacted by the independent variables (processing parameters). Understanding how fiber diameter and diameter distribution are affected by the processing parameters is essential to produce webs with desired fiber diameter and distribution. 

In order to optimize and predict the morphology and average fiber diameter of electrospun PAN precursor, design of experiment was employed. Morphology of fibers and distribution of fiber diameter of PAN preeursor were investigated varying concentration and applied voltage [116],... 

The morphology of the gold-sputtered electrospun fibers were observed by scanning electron microscope (SEM, Philips XL-30). The average fiber diameter and distribution was determined from selected SEM image by measuring at least 50 random... 

Feng et al. (2010) prepared electrospun chitosan nanofiber for hepatocyte culture. The fibers exhibited a uniform diameter distribution of 112 nm and they were nontoxic, but they did not check functions of hepatocytes attached on nanofibers. 

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