Reciprocating pin-on-disk (PoD) sliding tests were performed on a Bruker UMT Tribolab tribometer with a 1-100N load cell installed and operated at ambient conditions (20 °C and approx. 45% RH). The data sample rate of 1,000 Hz was selected. The CoF trace (μ) is obtained by first processing the applied load (F z ) and frictional force (F x ) traces to generate an Fx/F z trace. To remove datapoints attributed to static (and quasi-static) friction modes, the value for μ for each stroke (= 0.5 Hz) is taken from the average of the middle 50% of the F x /F z trace as this represents the dynamic friction phase of the sliding tests.