Homogenization of the Dense Composite Membranes …
57
Table 2 The composition and optical appearances of the constructed membranes
Membrane
number
Polymer
Zeolite Filler, % Additive
Additive % Appearance
1
PEBAX
–
–
–
–
Transparent
2
PEBAX
–
–
n-C14-TMABr 8.1
Transparent
3
PEBAX
–
–
DMAP
8.3
Transparent
4
PEBAX
CFI
22.3
–
–
White
5
PEBAX
CFI
22.0
n-C14-TMABr 8.6
Opaque
6
PEBAX
CFI
22.1
DMAP
8.5
White spots
7
PEBAX
OWE
22.3
White spots
8
PEBAX
OWE
21.9
n-C14-TMABr 8.5
Opaque
9
PEBAX
OWE
22.1
DMAP
8.7
White
10
PEBAX
IWS
22.0
–
–
White
11
PEBAX
IWS
21.8
n-C14-TMABr 8.5
Transparent
12
PEBAX
IWS
22.1
DMAP
8.4
White areas
13
PEBAX
ITR
22.0
–
-
Opaque
14
PEBAX
ITR
22.5
n-C14-TMABr 8.3
Transparent
15
PEBAX
ITR
22.6
DMAP
8.8
White spots
16
Polyactive –
–
–
–
Transparent
17
Polyactive –
–
n-C14-TMABr 8.0
Transparent
18
Polyactive –
–
DMAP
8.5
Transparent
19
Polyactive CFI
22.0
–
–
White
20
Polyactive CFI
22.1
n-C14-TMABr 8.4
Opaque
21
Polyactive CFI
22.7
DMAP
8.2
White
22
Polyactive OWE
22.4
White spots
23
Polyactive OWE
22.5
n-C14-TMABr 8.7
Transparent
24
Polyactive OWE
22.0
DMAP
8.8
White spots
25
Polyactive IWS
22.0
–
–
White
26
Polyactive IWS
21.6
n-C14-TMABr 8.3
Opaque
27
Polyactive IWS
22.4
DMAP
8.4
White
28
Polyactive ITR
22.2
–
–
Opaque
29
Polyactive ITR
22.3
n-C14-TMABr 8.4
Transparent
30
Polyactive ITR
22.5
DMAP
8.2
White spots
As it is common in the membrane community, permeability of each membrane
was expressed in unit Barrer. By the definition, permeability of one Barrer is the
permeation of 1 cm
3 of oxygen through the membrane with surface area of 1 cm
2 and
thickness of 1 mmHg during the time of 1 s with the pressure difference of 1 mmHg,
multiplied with factor 10
–10 . Formally speaking, the relation to the appropriate SI
unit is that one Barrer is equivalent to 3.35 × 10
–16 m
3 /m
2 Pasm.