Figure 1: Different applications of nanofibers
PAN C,%W |
k, mS/ cm |
|
|
without ODA |
+ODA |
1 |
23 |
85.5 |
3 |
52.5 |
159 |
5 |
71.6 |
209 |
8 |
91.4 |
261 |
10 |
97.8 |
285 |
12 |
103 |
302 |
15 |
107 |
317 |
18 |
111 |
326 |
Table 1: values of specific electrical conductivity before and after adding octadecylamine to the prepared solutions, at a temperature of 303 K
PAN, C % w+ ODA(5*10 5M) |
5 |
8 |
10 |
12 |
15 |
18 |
Av. fiber diameter(nm) |
90 |
150 |
190 |
235 |
330 |
420 |
Table 2: The average diameter of nanofibers for samples prepared at the concentration
PAN,C % w+ ODA |
5 |
8 |
10 |
12 |
15 |
18 |
||
T,K |
303 |
tp(sec) |
0.000714 |
0.002105 |
0.002941 |
0.003846 |
0.005263 |
0.006667 |
323 |
0.000667 |
0.000667 |
0.000667 |
0.000667 |
0.000667 |
0.000667 |
||
343 |
0.000606 |
0.000606 |
0.000606 |
0.000606 |
0.000606 |
0.000606 |
Table 3: Calculation of the relaxation time τ_(p) for samples prepared from PAN and after adding a fixed concen- tration (5*10-5M) of ODA, at temperatures T = (303,323,342) K and a constant voltage V = 4 Volt
Physical parameter value |
Physical/Electrical parameter |
100 |
molar mass M (Kg/mol) |
42.66 |
Capacitance C (Farad) |
13.5×10-3 |
disc radius r (m) |
0.1×10-3 |
disc thickness d (m) |
2.337×103 |
disc weight w (Kg) |
5.914×10-4 |
disk space A (m2) |
2.337×103 |
disk density d (Kg/m3) |
8.776×10-10 |
Dielectric constant K |
Table 4: Some values of physical and electrical coefficients for PAN at constant temperature T=303 K
PAN, |
5 |
8 |
10 |
12 |
15 |
18 |
C%w+ ODA(5×10-5M) |
||||||
ε |
18.101 |
18.334 |
17.822 |
18.658 |
18.35 |
20.707 |
P (m3 / mol) |
71854 |
71999 |
71677 |
72194 |
72008 |
73300 |
D (Debye) |
1.8844 |
1.8863 |
1.8821 |
1.8888 |
1.8864 |
1.9033 |
Table 5: Calculated values of ε, P and D for each of the samples studied at a temperature of 303 K
Figure 1: Different applications of nanofibers
Figure 2: Shows the relationship of the specific electrical conductivity to the concentrations of the prepared PAN solutions in the presence and absence of ODA, at a temperature of 303 K
Figure 3: Homemade electrospinning device
Figure 4: SEM electron microscopy images of spun PAN samples
Figure 5: The average diameter of the nanofibers of the prepared samples as a function of concentration
Figure 6: Schematic diagram of the method of connecting the sample to measure its complex impedance
Figure 7: The sum of the nodal impedance spectra of the six samples prepared from PAN after adding a fixed concentration (5*10-5M). From ODA at temperatures T= (303,323,342) K and constant voltage V=4 Volt
Figure 8: Relationship of the relaxation time with the concentration of the studied samples at temperatures T = (303,323,342) K and a constant voltage V = 4 Volt
Figure 9: Relationship of the loss factor spectrum to the frequency dependency of the studied samples at temperatures T = (303,323,342) K and a constant voltage V = 4 Volt
Figure 10: Shows the relationship of the number of dipoles to the concentration of samples prepared at a constant temperature of 303 K
Tables at a glance
Figures at a glance