Environmental Engineering Reference
In-Depth Information
(a)
Si
N
O
Si
N
O
Silica nanoparticles
deposition
N
Br
-
N
Grafting block copolymer
Br
b
O
Si
m
Silanization
n
Si
N
OMe
MeO
OMe
(b)
(c)
10 µm
10 µm
50 µm
50 µm
FIGURE 7.3
Preparation and characterization of a surface with switchable superoleophilicity and superoleophobicity on a
nonwoven textile substrate. (a) Diagram showing the preparation strategy for a surface with switchable super-
oleophilicity and superoleophobicity on a nonwoven textile using a pyridine contain polymer that changes
charge state as a function of pH. (b) Scanning electron microscope (SEM) image of the raw textile. Inset: enlarged
view of the surface of a single iber. (c) SEM image of the textile after deposition of silica nanoparticles and block
copolymer grafting. Inset: enlarged view of the surface of a single iber.
500,000
450,000
400,000
350,000
300,000
250,000
200,000
Untreated
Osorb treated
150,000
100,000
50,000
0
4
6
8
10
12
14
16
18
20
Time (min)
FIGURE 7.10
Photographs and gas chromatograms of emulsiied bilge water simulant before and after addition of 1.5% w/v
Osorb-EB sorbent media. Oil content is reduced to <5 ppm.
