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Piezoelectric and mechanical properties in bovine cornea
Author(s) -
Jayasuriya A. C.,
Scheinbeim J. I.,
Lubkin V.,
Bennett G.,
Kramer P.
Publication year - 2003
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.10536
Subject(s) - materials science , crystallinity , cornea , piezoelectricity , anisotropy , composite material , hydrogen bond , diffraction , modulus , fourier transform infrared spectroscopy , optics , molecule , chemistry , physics , organic chemistry
The piezoelectric coefficient (d 31 ) and Young's modulus (E) were investigated as a function of degree of hydration for bovine cornea. The piezoelectric and mechanical responses observed were anisotropic, and d 31 decreased, whereas E increased with decreasing the degree of hydration. The anisotropic mechanical and electromechanical properties observed seem to be caused by oriented crystalline collagen fibrils. In addition, the loss of water molecules appears to decrease crystallinity (of the collagen) in the cornea. With dehydration of the cornea, a reduction in crystallinity and changes in hydrogen bonding were observed by wide‐angle X‐ray diffraction and Fourier transform infrared measurements. The decrease of piezoelectricity in cornea during dehydration is most likely caused by the increase in modulus and the loss of order to a nonpiezoelectric phase in the collagen. © 2003 Wiley Periodicals, Inc. J Biomed Mater Res 66A: 260–265, 2003