The poor permeability evidenced for the membranes (water flux < 0.0667 mol.[m.sup.-2].[s.sup.-1]), in comparison with other permeabilities reported in literature (0.33 mol.[m.sup.-2].[s.sup.-1], PTFE membrane and pore diameter
of 0.45 [micron]m) (Cotamo-De la espriella et al., 2015), is related to its characteristics (thickness and porosity), factors that increase the resistance to flow through them (Cotamo-De la espriella et al., 2015).
The BET surface area, total pore volume and average pore diameter
obtained for the Moringa (S2) was found to be 2.45 m2g-1, 0.0018 cm3g-1 and 3.13 nm respectively, which is lower than all AC samples.
[N.sub.2] adsorption-desorption isotherms were determined by an Autosorb-1-MP specific surface area and pore size analyzer at 77 K from Quantachrome Instruments Company to obtain pore volume, average pore diameter
, and surface area of the AC and ASC.
Figure 5 shows the pore diameter
distribution of pure PSF membranes and PSF/PEG membranes with a loading of 5 and 10 wt%.
However the values of [(d[DELTA]P/df).sub.initial] cannot be simply correlated with only one parameter of the velocity u, or the porosity [[epsilon].sub.w], or the average pore diameter
[D.sub.p] and or the pore size distribution range 3<r, shown in Table 1.
SEM images of the ES scaffolds were analyzed using Image J (NIH), providing both fiber and pore diameter
Electron microscopy shows that the pore diameter
is distributed from 10 [micro]m to 100 [micro]m.
Accordingly, the aerocelluloses prepared in this study are considered mesoporous materials with a pore diameter
of 2-50 nm.
In Section 2, the derivation of the fractal acoustic model and the static flow resistivity formula are presented, and the calculation of the tortuosity fractal dimension, the pore area fractal dimension, the maximum pore diameter
, and the fibrous cluster radius is carried out in Section 3.
BET surface area, pore volume, and average pore diameter
of the fabricated EG were measured by mercury intrusion porosimetry using an Autopore IV 9500 analyzer (Micromeritics, USA).
There is a corresponding increase in the proportion of pores with diameters below about 0.05 [micro]m--that is, the average pore diameter
is reduced (refined).
Briefly, 0.1 mL of the precursor solution was deposited with a micropipette on the PC membrane with 100 nm pore diameter
and 13 mm external diameter (SPI Supplies).