Статьи на перевод PVDF_P(VDF-TrFE) / Flexible Thin-Film PVDF-TrFE Based
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Figure S1: Schematic showing the molecular structure of (a) alpha phase, and (b) beta phase of PVDF-TrFE. Permission obtained from [11]
Kapton
Figure S2 : Fabrication procedure of flexible pressure sensors
Cfeedback
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R |
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Rvar |
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Out |
PVDF |
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OPA227 |
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AD620 |
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Device |
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C |
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(a)
(b)
Figure S3: Thin-film sensor charge amplifier circuit. (a) Circuit schematic of a single channel charge amplifier, and (b) photograph of the custom-built dual channel charge amplifier.
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0.1 |
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0.0 |
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-0.1 |
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(mW) |
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6 um, cured |
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1 um, cured |
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Heat |
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-0.3 |
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-0.4 |
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146 C |
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147.7 C |
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-0.5 |
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110 |
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Temperature (oC)
(b)
Figure S4: Weight normalized differential scanning calorimetry (DSC) measurements: (a) comparison of a 6µm thick PVDF films versus a 1µm thick PVDF film with higher crystallinity obtained from 1µm thick films; and (b) heat flow in a melted PVDF film
PVDF Output (V)
Pressure (mmHg)
0.3
0.2
0.1
0.0 -0.1 -0.2
-0.3
-0.4
PVDF Output
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-20 -40 -60
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Time (s)
Figure S5: Real-time signal from a catheter-mounted PVDF sensor versus the commercial sensor (on vascular testing
model pressure) located in close proximity to the PVDF sensor
Table S1: Summary of ferroelectric properties of different materials, adapted from [11]
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Density |
Piezoelectric |
Pyroelectric |
Coupling |
Youngs |
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Material |
constant, d |
coefficient |
factor |
Modulus |
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3 |
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(g/cm ) |
(pC/N) |
(µC/m2K) |
(%) |
(GPa) |
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PVDF |
1.76 |
20 |
40 |
16 |
10-12 |
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PVDF- |
1.9 |
15-30 |
30-40 |
20 |
10-12 |
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TrFE |
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PZT-5 |
7.75 |
171 |
60-500 |
34 |
60-120 |
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Quartz |
2.66 |
2 |
- |
9 |
- |