Biomedical Engineering Reference
In-Depth Information
2.5
2.0
1.5
1.0
0.5
0.0
0
1
2
3
4
5
6
7
Sample number
FIGURE 3.29
Comparisons of six different IPMNC samples treated with dispersing agents.
C
R
Reducing
agent
Pt salts
Base polymer
FIGURE 3.30
Platinum reducing process. Dark circles represent platinum particles.
3.3.6
A
DDITIONAL
R
ESULTS
ON
S
TRETCHED
IPMNC
S
TO
E
NHANCE
F
ORCE
G
ENERATION
AND
O
THER
P
HYSICAL
P
ROPERTIES
In chapter 2 the effect of increased permeability due to physical stretching of ionic
polymer-metal composites (IPMNCs) on the physical properties of IPMNCs was
briefly discussed as a phenomenon. Here, a detailed experimental discussion is
presented on this observed phenomenon in connection with increasing the force
density of IPMNC samples in cantilever mode and in terms of the blocking force.
In this new effort, as-received ionic polymers or, in particular, Nafion-117 mem-
branes were mechanically stretched following the machining direction (uniaxially).
Initially, three samples, sample A (Pt), sample B (Pt), and sample C (Pt), were
prepared for 5, 6, and 19% permanent stretching, respectively. The underlying
principle of this effort is to attempt to increase the permeability of base polymeric
materials. Platinum compositing was carried out based upon ERI-recipe with PVP.
Further, three more samples with surface electroding were prepared by gold
plating. Those samples were noted as sample A (Pt/Au), sample B (Pt/Au), and
sample C (Pt/Au), respectively. A total of six samples were prepared in this effort.
Note that Li
+
was chosen as an effective cation for all samples.
