Figure 2
From: Low cost, high performance ultrafiltration membranes from glass fiber-PTFE–graphene composites

Mechanical properties of membranes. (A) Typical stress–strain curves for a GF membrane and a composite membrane with fractional mass uptake of 1.1. (B–D) Modulus (B), tensile strength (C) and strain at break (D), all plotted versus measure membrane density. Data is plotted for membranes filled with both PTFE and PTFE + graphene. Also shown are data for commercial membranes. The dashed lines in (B,C) represent linear and quadratic behaviour respectively.