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Fabrication and characterization of poly(vinyl alcohol)—Glycerol—Spinel ferrites flexible membranes
Author(s) -
Shaheen Adel,
Haija Mohammad A.,
Chamakh Mariem,
Assayed Ghada A. I.,
Banat Fawzi,
Ayesh Ahmad I.
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.48821
Subject(s) - vinyl alcohol , membrane , materials science , dielectric spectroscopy , chemical engineering , fourier transform infrared spectroscopy , thermogravimetric analysis , dopant , nanoparticle , polymer chemistry , polymer , composite material , nanotechnology , chemistry , electrochemistry , doping , electrode , biochemistry , engineering , optoelectronics
Polymer membranes of ferrites nanoparticles, glycerol, and poly(vinyl alcohol) (PVA) were fabricated using a solution casting method. Spinel ferrites nanoparticles, CuFe 2 O 4 or ZnFe 2 O 4 , and glycerol were used as dopants to control the membranes' electrical conductivity. The morphology, composition, and interaction between PVA and the dopants were investigated byscanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), differentialscanning calorimeter (DSC), and thermal gravimetric analysis (TGA). Electrical characterization of the membranes was conducted by impedance spectroscopy using frequencies between 1 and 10 6 Hz and variable temperatures. The results revealed a negative temperature coefficient of the resistance of the membranes. Additionally, membranes with ZnFe 2 O 4 nanoparticles exhibit higher electrical impedance than those with CuFe 2 O 4 nanoparticles. Therefore, electrical conductivity could be controlled using a suitable dopant's composition and concentration. The membranes presented in this study exhibit semiconducting properties, thus, they have potentials to be utilized in multiple applications including the flexible organic‐based device. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48821.