Biomedical Engineering Reference
In-Depth Information
Force graph ( 1M HCl )
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
10
20
30
40
50
60
Time (sec)
FIGURE 4.124(b)
Force versus time curve with 1
M
HCl.
Force curve ( 2M HCl)
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
10
20
30
40
50
60
Time (sec)
FIGURE 4.125
Force versus time curve with 2
M
HCl.
In order to investigate the anion distribution for force production of PAN muscle,
two kinds of acid were prepared: sulfuric acid and nitric acid. Force generation was
measured under the same condition as the previous experiment. Normality was used
to give equal amounts of hydrogen ion to the muscle system: 0.01, 0.1, 0.5, and 1
N
of each solution was applied to the single PAN fiber. Like the previous experiment,
a single fiber covered the whole experiment and, after tensile work, 1-
M
LiOH solution
was applied to release the muscle, followed by rinsing the fiber with distilled water.
Table 4.10 shows the maximum force of each concentration of acid. Force curves
by acid concentration higher than 0.1
N
had similar values and patterns. Under 0.01-
N
concentration, the force curve had a step increase due to discontinuous supply of
acid solution (a 5-mL pipette was used to spray the solutions). The ion diffusion
took longer than with a higher concentration because of the limited amount of ions
carried within the 0.01-
N
solution. To confirm the differences between HCl and other
