Table 1 Maximum forces generated upon insertion and retraction of needles as well as surface roughness and COF of bare, TFMG-, Ti- and TiN-coated needles.
From: Non-stick syringe needles: Beneficial effects of thin film metallic glass coating
Coating material | Insertion peak force (N) | Retraction peak force (N) | Surface roughness, Rq (nm) | Coefficient of friction | ||
|---|---|---|---|---|---|---|
Rubber | Pork muscle | Rubber | Pork muscle | |||
Bare | 2.27 ± 0.13 | 0.15 ± 0.02 | 1.51 ± 0.05 | 0.044 ± 0.010 | 16.2 ± 2.7 | 0.33 ± 0.03 |
Ti | 2.27 ± 0.18 | 0.16 ± 0.02 | 1.64 ± 0.12 | 0.039 ± 0.006 | 11.9 ± 1.6 | 0.36 ± 0.03 |
TiN | 2.06 ± 0.24 | 0.14 ± 0.02 | 1.50 ± 0.20 | 0.034 ± 0.004 | 14.2 ± 0.7 | 0.23 ± 0.01 |
TFMG | 0.78 ± 0.09 | 0.08 ± 0.01 | 0.43 ± 0.05 | 0.026 ± 0.003 | 10.0 ± 1.7 | 0.05 ± 0.01 |
