Table 3: Apparent density and open porosity values of composites before and after pyrolysis.

NumberCompositeApparent density (g/cm3; ±0.01)Open porosity (%; ±1)

1G/PBefore pyrolysis1.94
After pyrolysis1.8216

2G-CF/PBefore pyrolysis1.86
After pyrolysis1.7415

3CNT-CF-G/PBefore pyrolysis1.85
After pyrolysis1.7110