Effect of Heat Treatments on Wettability of Nacre

Abstract:

The surface wettability of biomaterials influences on osteoblast behavior and bone formation. In this research, the variation of wettability of nacre by heat treatments was examined. Plates of the nacre were fabricated from shells of the Akoya pearl oyster. The specimens were heated at 100, 200, 300, 400, 500, and 600 °C. Characterizations of the specimens during and after heat treatments were carried out using scanning electron microscopy, X-ray diffractometry, and thermogravimetry-differential thermal analysis. The water contact angle (WCA) of the specimen was measured to evaluate wettability. The color of nacre changed from iridescent color to brownish weak-iridescence by the heating at and over 300 °C. The nacre heated at and over 300 °C became brittle because organic substances in nacre, which acts as the glue between the aragonite platelets were evaporated by the heating. The WCA of the specimen was decreased with increasing heating temperature, which should be related to the decrease in the number of organic substances in nacre by the heating.

• Periodical: Materials Science Forum (Volume 985)
• Pages: 86-90
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.985.86
• Online since: April 2020
• Authors: Andi Muhammad Anshar*, Sengo Kobayashi, Satoshi Okano
• Keywords: Biomaterial, Heat Treatment, Nacre, Wettability

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