Abstract
Bovine Submaxillary Mucin (BSM) generates thin film layers via spontaneous adsorption onto hydrophobic surfaces such as Poly(dimethylsiloxane) (PDMS) and High Density Polyethylene (HDPE). A characteristic feature of mucin is its tribological- or lubricating properties. Circular dichroismspectroscopyrevealed that BSM is thermally stable over a wide range of temperatures (5–85°C) in its conformation, and Pin-on-Disk tribometry at low speeds showed negligible influence on lubricating properties. Employing the Mini Traction Machine, BSM was found to retain comparable lubricating properties after heating to 80°C and subsequent cooling. Random coiled secondary- and lack of tertiary structure in BSM is believed to contribute to the heat tolerance observed with regards to its conformational and lubrication properties.
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