期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 134, 期 5, 页码 -出版社
WILEY
DOI: 10.1002/APP.44427
关键词
biodegradable; biopolymers & renewable polymers; blends; dielectric properties
资金
- B. S. Abdur Rahman University, Chennai, TN, India
In the present study, fumed silica (SiO2) nanoparticle reinforced poly(vinyl alcohol) (PVA) and poly(vinylpyrrolidone) (PVP) blend nanocomposite films were prepared via a simple solution-blending technique. Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible spectroscopy (UV-vis), X-ray diffraction (XRD), and scanning electron microscopy (SEM) were employed to elucidate the successful incorporation of SiO2 nanoparticles in the PVA/PVP blend matrix. A thermogravimetric analyzer was used to evaluate the thermal stability of the nanocomposites. The dielectric properties such as dielectric constant (epsilon) and dielectric loss (tan delta) of the PVA/PVP/SiO2 nanocomposite films were evaluated in the broadband frequency range of 10(-2) Hz to 20 MHz and for temperatures in the range 40-150 degrees C. The FTIR and UV-vis spectroscopy results implied the presence of hydrogen bonding interaction between SiO2 and the PVA/PVP blend matrix. The XRD and SEM results revealed that SiO2 nanoparticles were uniformly dispersed in the PVA/PVP blend matrix. The dielectric property analysis revealed that the dielectric constant values of the nanocomposites are higher than those of PVA/PVP blends. The maximum dielectric constant and the dielectric loss were 125 (10(-2) Hz, 150 degrees C) and 1.1 (10(-2) Hz, 70 degrees C), respectively, for PVA/PVP/SiO2 nanocomposites with 25 wt % SiO2 content. These results enable the preparation of dielectric nanocomposites using a facile solution-casting method that exhibit the desirable dielectric performance for flexible organic electronics. (C) 2016 Wiley Periodicals, Inc.
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