Biomedical Engineering Reference
In-Depth Information
Table 3.7 shows the detailed information regarding the manufacturing processes
involved. Figures 3.31 and 3.32 depict the difference in particle geometry and
distributions before and after stretching.
Note that the mechanical stretching of raw ionomers using a testing machine
(17% uniaxial stretching was performed) actually affects the morphology of nano-
particles embedded within the macromolecular network.
TABLE 3.7
IPMNC Samples Prepared
Sample A
(Pt and Pt/Au)
Sample B
(Pt and Pt/Au)
Sample C
(Pt and Pt/Au)
Base material
Nafion-117
Nafion-117
Nafion-117
Initial composition
Pt
Pt
Pt
Surface electroding
Au
Au
Au
Cation
Lithium
Lithium
Lithium
Stretching
5%
6%
19%
Pt penetration
~20
µ
m
~20
µ
m
~40
µ
m
Size
Width = 6.35 mm
Length = 25.4 mm
Thickness = 163
Width = 6.35 mm
Length = 25.4 mm
Thickness = 159
Width = 6.35 mm
Length = 25.4 mm
Thickness = 150
µ
m
µ
m
µ
m
70.00 nm
70.00 nm
FIGURE 3.31
Platinum particle geometry and distributions before (left) and after (right)
stretching 17% uniaxially.
7.00 nm
1.00 nm
FIGURE 3.32
Change in blocking force for typical samples after stretching.
