Dielectric properties and bioactivity of PVA/PEG/TiO2 fibers for capacitive based body sensor

Abstract

TiO2 nanoparticles are known as a material which widely used in optoelectronic, industrial, and health sectors application. This material has a controllable dielectric constant making it possible to be utilized as a capacitive based body sensor. Many efforts had been studied by means of synthesizing TiO2 nanoparticles in the form of conventional film depositions. It is also obtained that rare information of comprehensive study related to dielectric properties of the materials. In this report, we propose to synthesize PVA/PEG/TiO2 fibers using electrospinning method at various TiO2 concentration. Dielectric properties and bioactivity of samples are a focus of study. Electro spinning process has been performed with a voltage of 20 kV, and flow rate of 100 for 3 minutes. We used ITO glass as substrates. The FTIR spectra showed a successful synthesis of PVA/PEG/TiO2 fibers. This is indicated by the appearance of the corresponding characteristics of PVA, PEG, and TiO2 bonds. The XRD patterns showed the main peaks of TiO2 as well as the diffraction peaks of PVA. We obtain that the average size of PVA/PEG/TiO2 fiber is 268.27 nm. The dielectricity of PVA/PEG/TiO2 fibers increased with the addition of TiO2 nanoparticles. In addition, the increase of frequency effect to the decreased of dielectric constant. The toxicity test of PVA/PEG/TiO2 fibers showed that the samples were non-toxic. On the other hand, the result of the anti-bacterial analysis showed that the samples had no anti-bacterial properties against S. aureus bacteria.