Mechanical properties of the 6FPBI, 0.3 wt% CNF/6FPBI, 0.3 wt% CNF–aminobenzoyl/6FPBI nanocomposite membranes after phosphoric acid doping.
| Acid-doped membranesa | Filler content (wt%) | Tensile properties | ||
|---|---|---|---|---|
| Elastic modulus (GPa) | Tensile strengthb (MPa) | Strain at break (%) | ||
| 6FPBI | 0 | 0.23 ± 0.04 | 9.7 ± 0.9 | 86.1 ± 19.4 |
| CNF/6FPBI | 0.3 | 0.28 ± 0.07 | 10.2 ± 1.5 | 87.9 ± 15.5 |
| CNF–aminobenzoyl/6FPBI | 0.3 | 0.36 ± 0.11 | 12.5 ± 1.4 | 96.4 ± 13.1 |
a
All the acid-doped nanocomposite membranes were prepared by immersing the membranes in phosphoric acid at 80 °C for 3 h before the tensile test.
b
Tensile strength is the maximum stress during the tensile deformation of the membrane before the break.