|About this Abstract
||Materials Science & Technology 2011
||Next Generation Biomaterials
||Electrochemical Characterization of the Eastern Oyster Crassostrea Virginica Shell as a Bioceramic Material
||Yuhchae Yoon, Douglas C Hansen, Karolyn M Hansen, Andrew S Mount
|On-Site Speaker (Planned)
The shell of the Eastern oyster (Crassostrea virginica) was investigated the effects of shell thickness, orientation and layer composition on its electrochemical behavior using EIS, potentiodynamic polarization and SEM-EDS. The resistance and electrolyte conductivity measurements through the shell using a four electrode cell configuration were made. SEM-EDS analysis of the oyster shell revealed that the multilayered biocomposite material is composed of calcium carbonate (CaCO3) with numerous incongruent “chalky” and “non-chalky” layers. The electrolyte conductivity within the pores of the shell was shown to be dependent on the ionic concentration of the electrolyte. The impedance of the whole oyster shell in the low frequency region exhibited high impedance values which exhibited a decreasing trend with increasing immersion time. The limiting currents through the shell were observed to increase when the outer layers of the shell were sequentially removed by grinding, thus decreasing the shell thickness. More details will be present.