Effect of Filler Synergy and Cast Film Extrusion Parameters on Extrudability and Direction-Dependent Conductivity of PVDF/Carbon Nanotube/Carbon Black Composites
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Composite Preparation
2.3. Material Characterization
3. Results and Discussion
3.1. Comparison of Single and Hybrid Filler Systems in PVDF Composites
3.2. Influence of the Preparation Procedure on the Electrical Conductivity: Direct Compounding (DC) vs. Masterbatch Dilution (MBD) and Microcompounder vs. Laboratory Extruder
3.3. Direction-Dependent Electrical Conductivity in Compression-Molded Plates and Extruded Films
3.4. Mechanical Properties of Extruded Films
3.5. Variation of Film Extrusion Process Conditions
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Filler Content | σz [S/cm] | σx = y [S/cm] | σx [S/cm] | σy [S/cm] | σz plate/film | σx = y plate/x film | σx = y plate/y film | |
---|---|---|---|---|---|---|---|---|
Plates | Films | Plates | Films | Films | ||||
1 wt % b-MWCNT [26] | 1.8 × 10−2 | 3.2 × 10−3 | 1.0 × 100 | 5.4 × 10−1 | 1.4 × 10−1 | 6 | 2 | 7 |
2 wt % b-MWCNT [26] | 2.7 × 10−2 | 1.7 × 10−2 | 2.3 × 100 | 2.5 × 100 | 6.9 × 10−1 | 2 | 1 | 3 |
4 wt % CB [26] | 2.9 × 10−2 | 6.1 × 10−2 | 1.7 × 10−1 | 2.8 × 10−1 | 2.4 × 10−1 | 0.5 | 1 | 1 |
5 wt % CB | 5.0 × 10−2 | 1.1 × 10−1 | 2.4 × 10−1 | 2.7 × 10−1 | 2.8 × 10−1 | 0.5 | 1 | 1 |
1 wt % b-MWCNT+ 1 wt % CB | 1.5 × 10−2 | 8.0 × 10−3 | 7.1 × 10−1 | 2.9 × 10−1 | 1.2 × 10−1 | 2 | 2 | 6 |
1 wt % b-MWCNT+ 2 wt % CB | 3.7 × 10−2 | 2.8 × 10−2 | 1.6 × 100 | 1.1 × 100 | 3.1 × 10−1 | 1 | 1 | 5 |
1 wt % b-MWCNT+ 3 wt % CB | 2.4 × 10−2 | 4.9 × 10−2 | 1.4 × 100 | 1.3 × 100 | 3.9 × 10−1 | 0.5 | 1 | 4 |
1 wt % b-MWCNT+ 4 wt % CB | 2.4 × 10−2 | 6.9 × 10−2 | 1.4 × 100 | 1.2 × 100 | 5.6 × 10−1 | 0.3 | 1 | 3 |
Filler Content | Plates | Extruded Films | ||
---|---|---|---|---|
σx=y/z | σx/z | σy/z | σx/y | |
1 wt % b-MWCNT [26] | 56 | 166 | 42 | 4 |
2 wt % b-MWCNT [26] | 84 | 144 | 40 | 4 |
4 wt % CB [26] | 6 | 5 | 4 | 1 |
5 wt % CB | 5 | 3 | 3 | 1 |
1 wt % b-MWCNT+ 1 wt % CB | 47 | 37 | 15 | 2 |
1 wt % b-MWCNT+ 2 wt % CB | 43 | 39 | 11 | 3 |
1 wt % b-MWCNT+ 3 wt % CB | 58 | 26 | 8 | 3 |
1 wt % b-MWCNT+ 4 wt % CB | 58 | 17 | 8 | 2 |
Filler | Thickness [µm] | Et [MPa] | σB [MPa] | εB [%] |
---|---|---|---|---|
unfilled | 100 | 2271 ± 118 (x) | 48.3 ± 0.4 (x) | 60–>100 (x) |
2333 ± 48 (y) | 48.9 ± 1.1 (y) | 5.4 ± 1 (y) | ||
2 wt % b-MWCNT | 100 | 2673 ± 130 (x) | 47.2 ± 2.3 (x) | 2.7 ± 0 (x) |
2021 ± 45 (y) | 28.0 ± 0.6 (y) | 2.3 ± 0 (y) | ||
1 wt % b-MWCNT + 1 wt % CB | 100 | 2441 ± 143 (x) | 52.3 ± 1.4 (x) | 7.0 ± 1 (x) |
2278 ± 90 (y) | 45.1 ± 1.3 (y) | 5.1 ± 1 (y) | ||
1 wt % b-MWCNT + 3 wt % CB | 100 | 2230 ± 13 (x) | 46.7 ± 0.6 (x) | 5.8 ± 0 (x) |
2356 ± 116 (y) | 43.0 ± 1.2 (y) | 4.2 ± 0 (y) | ||
1 wt % b-MWCNT + 3 wt % CB | 65 | 2105 ± 158 (x) | 39.4 ± 2.5 (x) | 3.9 ± 1 (x) |
1557 ± 518 (y) | 30.8 ± 3.0 (y) | 4.1 ± 1 (y) |
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Krause, B.; Kunz, K.; Kretzschmar, B.; Kühnert, I.; Pötschke, P. Effect of Filler Synergy and Cast Film Extrusion Parameters on Extrudability and Direction-Dependent Conductivity of PVDF/Carbon Nanotube/Carbon Black Composites. Polymers 2020, 12, 2992. https://doi.org/10.3390/polym12122992
Krause B, Kunz K, Kretzschmar B, Kühnert I, Pötschke P. Effect of Filler Synergy and Cast Film Extrusion Parameters on Extrudability and Direction-Dependent Conductivity of PVDF/Carbon Nanotube/Carbon Black Composites. Polymers. 2020; 12(12):2992. https://doi.org/10.3390/polym12122992
Chicago/Turabian StyleKrause, Beate, Karina Kunz, Bernd Kretzschmar, Ines Kühnert, and Petra Pötschke. 2020. "Effect of Filler Synergy and Cast Film Extrusion Parameters on Extrudability and Direction-Dependent Conductivity of PVDF/Carbon Nanotube/Carbon Black Composites" Polymers 12, no. 12: 2992. https://doi.org/10.3390/polym12122992