Notes
The coefficient of friction was determined using an Implant Sciences Corporation ISC-200 (pin-on-disc) Tribometer using a rubber pin with 40 mm2 contact area and 250 g static load on the pin. The pin was immersed in water during the test and the tested specimen rotated under the pin. As the measured coefficient of friction was observed to change (generally a decrease) with increasing number of rotations, the results in Fig. 1 were obtained by conditioning the samples through measurement over 10,000 rotations, rinsing the samples and pin with water then measuring the coefficient of friction of these conditioned samples.
A safe level of static coefficient of friction is indicated as at least 0.5 according to the standard ASTM D 2047, “Standard Test Method for Static Coefficient of Friction of Polish-Coated Floor Surfaces as Measured by the James Machine”, ASTM International
The light transmittance was measured by a Shimadzu UV-3101PC spectrophotometer. The samples were 1 mm thick glass microscope slides (both coated and uncoated).
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Aegerter, M.A., Almeida, R., Soutar, A. et al. Coatings made by sol–gel and chemical nanotechnology. J Sol-Gel Sci Technol 47, 203–236 (2008). https://doi.org/10.1007/s10971-008-1761-9
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DOI: https://doi.org/10.1007/s10971-008-1761-9