Page 607 - Polymer-based Nanocomposites for Energy and Environmental Applications

560 Polymer-based Nanocomposites for Energy and Environmental Applications

Fig. 20.6 (A) Chemical structure of synthesized FPU, (B) representation of the preparation
of the NF-F filter membranes, (C) filtration process of the NF-F membranes for aerosol
particles [1].

60
100 50 0.18
Filtration efficiency (%) 80 40 Pressure drop (Pa) Quality factor (Pa −1 ) 0.14
90
0.16
70
30
0.12
60
0.10
20
50
Filtration efficiency
40
Pressure drop 10 0.08
0.06
30 0
7 9 11 13 7 9 11 13
(A) Concentration (wt%) (B) Concentration (wt%)
2.2
7
7wt% 2.0
9wt%
1.8
6
Tensile stress (MPa) 5 4 3 13 wt% Young’s modulus (MPa) 1.4
11 wt%
1.6
1.2
1.0
0.8
0.4
1 2 0.6
0.2
0 0.0
0 20 40 60 80 100 120 140 160 7 9 11 13
(C) Strain (%) (D) Concentration (wt%)
Fig. 20.7 (A) The filtration performance, (B) the quality factor, (C) the stress-strain curves, and
(D) Young’s modulus of PAN fibrous filters fabricated with varied concentrations [1].