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- W2037862291 abstract "In this paper, we did a study of the physicochemical, dielectric and piezoelectric properties of collagen films, considering the development of new biomaterials which have potential applications in coating of cardiovascular prostheses, support for cellular growth and in systems for controlled drug delivery. The piezoelectric strain tensor element d14, the elastic constant S55, and the dielectric permittivity ε11 were measured for collagen films. It was observed that the collagen samples submitted to different pH treatment lead to different electrical behavior. For sample S2 (pH=5.2) one has a higher denaturation temperature (Td=80.55°C), lowest density (ρ=909.6 kg m−3), highest dielectric function, lowest frequency constant product (f×L=320.33 kHz.m) and higher piezoelectricity (d14=0.122 pC/N) which is our major interest in this study. The loss factor Q−1 measured for all the samples shows that for all the electrodes dimensions sample S2 present the highest loss factor which is between 0.68 and 0.76. We believe that the different pH treatment is critical to the final level of organization of the microscopic structure of the sample, which could result in an increase of the piezoelectricity." @default.
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- W2037862291 date "2001-06-01" @default.
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- W2037862291 title "Effect of the pH on the piezoelectric properties of collagen films" @default.
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