Characterization of micro-ZnO/PDMS composite structured via dielectrophoresis – Toward medical application
نویسندگان
چکیده
This paper proposed a new approach to achieve full characteristic of highly non-linear current density–electric field (J-E) curve, which depends on various key factors in terms filler concentration, temperature, input voltage level, and structuration ZnO particles (i.e. aligned or randomly dispersed). The homogeneity particle distribution within the polymer matrix, together with chain-like structure composites elaborated volume fraction was verified via microscopic investigations. Numerical simulation also conducted through COMSOL Multiphysics, giving an estimation around phase. Experimental characterization addition analytical models established using varying (sinusoidal) direct (DC) tests. DC test carried out order identify conduction profile as well percolation threshold samples. Temperature has considerable influence switching dielectric permittivity nonlinear composites. In sinusoidal test, discrimination adopted bipolar polarization loop, allowed detailed quantification conductivity values, while prediction capacitive density enabled distinguish relative permittivity. These results demonstrated that electrical properties compound, such permittivity, substantially enhanced increasing content, especially when samples were subjected dielectrophoretic manipulation. Further analysis unipolar predict loss factor function applied field. Finally, by playing different pertinent parameters, it possible efficiently control electric mechanical characteristics composite. Such are important application microvaristors used protection devices. By associating other features like piezoelectricity, this material is undoubtedly high interest medical use where multifunctional system design becomes mandatory.
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ژورنال
عنوان ژورنال: Materials & Design
سال: 2021
ISSN: ['1873-4197', '0264-1275']
DOI: https://doi.org/10.1016/j.matdes.2021.109912