Papers by NUR HIDAYAH BINTI AHMAD 15751
In this present work, carboxymethyl cellulose (CMC) – ammonium chloride (NH4Cl) solid polymer ele... more In this present work, carboxymethyl cellulose (CMC) – ammonium chloride (NH4Cl) solid polymer electrolyte (SPE) films were prepared by solution casting method. The ionic conductivity and electrical properties of SPE films were investigated using Electrical Impedance Spectroscopy. SPE film containing 16 wt. % NH4Cl exhibited the highest ionic conductivity of 1.43 x 10 S/cm at ambient temperature, 303K. The temperature dependence SPE films showed an Arrhenius-type relation where the regression values obtained from the log conductivity versus reciprocal temperature is close to unity (R≈1). The electrical properties have been measured as a function of frequency of Ԑr, Ԑi, Mr, Mi shown a non-Debye type behavior.
American-Eurasian Journal of Sustainable Agriculture Ionic Conductivity and Structural Analysis of Carboxymethyl Cellulose Doped With Ammonium Fluoride as Solid Biopolymer Electrolytes
American-Eurasian Journal of Sustainable Agriculture
In the present work, a series of solid biopolymer electrolytes (SBEs) from carboxymethyl cellulos... more In the present work, a series of solid biopolymer electrolytes (SBEs) from carboxymethyl cellulose (CMC) doped with ammonium fluoride (NH4F) (0-13 wt. %) was successfully prepared by solution cast technique. SBE sample containing 9 wt.% NH4F was found to exhibit the highest ionic conductivity of 2.68 x 10-7 Scm-1 at ambient temperature. XRD analysis revealed that the SBE samples containing NH4F salt to be semi-crystalline in nature. FTIR spectra showed that the interaction between CMC and NH4F has occurred in the polymer-salt system and the CMC-NH4F SBE system was a proton conductor.
Solid biopolymer electrolytes (SBEs) system based on carboxymethyl cellulose (CMC) doped with amm... more Solid biopolymer electrolytes (SBEs) system based on carboxymethyl cellulose (CMC) doped with ammonium chloride (AC) has been prepared via solution casting technique. Impedance study shows the highest ionic conductivity, σ, was found to be (1.43 ± 0.02) x 10 -3 S/cm at room temperature (303 K) for sample containing 16wt. % of ammonium chloride. The conductivity of the CMC-AC was found to increase relatively to the AC content and temperature. The temperature-dependent of solid biopolymer electrolyte obeys Arrhenius behaviour which R 2 ≈1. The activation energy was found to be capsized with the conductivity. The Quantum mechanical tunnelling (QMT) is the best possible mechanism to present the hopping method in the CMC-AC system studied.
The present study aims to investigate the structural and ionic conductivity of carboxymethyl cell... more The present study aims to investigate the structural and ionic conductivity of carboxymethyl cellulose -ammonium chloride as proton conducting polymer electrolytes. The complexion of polymer electrolyte films has been confirmed via FTIR studies. The conductivity enhancement with the addition of ammonium chloride concentration was proved due to the increase in amorphous nature of the films as evidenced XRD analysis. Impedance studies indicate that the highest ionic conductivity of 1.43 x 10 -3 Scm -1 was observed with the addition of 16 wt.% ammonium chloride in polymer electrolyte system obtained at ambient temperature.
Solid biopolymer electrolytes (SBEs) system based on carboxymethyl cellulose (CMC) doped with amm... more Solid biopolymer electrolytes (SBEs) system based on carboxymethyl cellulose (CMC) doped with ammonium chloride (AC) has been prepared via solution casting technique. Impedance study shows the highest ionic conductivity, σ, was found to be (1.43 ± 0.02) x 10-3 S/cm at room temperature (303 K) for sample containing 16wt. % of ammonium chloride. The conductivity of the CMC-AC was found to increase relatively to the AC content and temperature. The temperature-dependent of solid biopolymer electrolyte obeys Arrhenius behaviour which R 2 ≈1. The activation energy was found to be capsized with the conductivity. The Quantum mechanical tunnelling (QMT) is the best possible mechanism to present the hopping method in the CMC-AC system studied.
The present study aims to investigate the structural and ionic conductivity of carboxymethyl cell... more The present study aims to investigate the structural and ionic conductivity of carboxymethyl cellulose-ammonium chloride as proton conducting polymer electrolytes. The complexion of polymer electrolyte films has been confirmed via FTIR studies. The conductivity enhancement with the addition of ammonium chloride concentration was proved due to the increase in amorphous nature of the films as evidenced XRD analysis. Impedance studies indicate that the highest ionic conductivity of 1.43 x 10-3 Scm-1 was observed with the addition of 16 wt.% ammonium chloride in polymer electrolyte system obtained at ambient temperature.
Two solid biopolymer electrolytes (SBEs) systems of carboxymethyl cellulose doped ammonium chlori... more Two solid biopolymer electrolytes (SBEs) systems of carboxymethyl cellulose doped ammonium chloride (CMC-AC) and propylene carbonate plasticized (CMC-AC-PC) were prepared via solution casting technique. The ionic conductivity of SBEs were analyzed using electrical impedance spectroscopy (EIS) in the frequency range of 50 Hz-1 MHz at ambient temperature (303 K). The highest ionic conductivity of CMC-AC SBE is 1.43 × 10 −3 S/cm for 16 wt.% of AC while the highest conductivity of plasticized SBE system is 1.01 × 10 −2 S/cm when added with 8 wt.% of PC. TGA/DSC showed that the addition of PC had increased the decomposition temperature compared of CMC-AC SBE. Fourier transform infrared (FTIR) spectra showed the occurrence of complexation between the SBE components and it is proved successfully executed by Gaussian software. X-ray diffraction (XRD) indicated that amorphous nature of SBEs. It is believed that the PC is one of the most promising plasticizer to enhance the ionic conductivity and performance for SBE system.
In this present work, carboxymethyl cellulose (CMC)-ammonium chloride (NH 4 Cl) solid polymer ele... more In this present work, carboxymethyl cellulose (CMC)-ammonium chloride (NH 4 Cl) solid polymer electrolyte (SPE) films were prepared by solution casting method. The ionic conductivity and electrical properties of SPE films were investigated using Electrical Impedance Spectroscopy. SPE film containing 16 wt. % NH 4 Cl exhibited the highest ionic conductivity of 1.43 x 10-3 S/cm at ambient temperature, 303K. The temperature dependence SPE films showed an Arrhenius-type relation where the regression values obtained from the log conductivity versus reciprocal temperature is close to unity (R 2 ≈1). The electrical properties have been measured as a function of frequency of Ԑ r , Ԑ i , M r , M i shown a non-Debye type behavior.
Solid biopolymer electrolytes (SBEs) based on carboxy methylcellulose (CMC) has been prepared by ... more Solid biopolymer electrolytes (SBEs) based on carboxy methylcellulose (CMC) has been prepared by doping different concentration of Adipic acid (AA) via solution casting technique. Fourier Transform Infrared spectroscopy was used to study the interaction between the host and ionic dopant. New peaks were observed at at 1714 and 1261 cm-1 at AA-5. It also can observe that 5 peaks intensity have become decrease. XRD analysis was shown the CMC-AA was the amorphous solution.The highest ionic conductivity achieved at room temperature is 6.12 x 10-7 S cm-1 for CMC incorporated with 5 wt. % AA. In addition, the temperature dependence of the SBEs exhibit Arrhenius behavior. That the activation energy of relaxation is lower than the activation energy of conduction implies that the charge carrier has to overcome the higher energy barrier during conducting.
The present work focuses on the preparation of solid polymer electrolytes (SPEs) based carboxymet... more The present work focuses on the preparation of solid polymer electrolytes (SPEs) based carboxymethyl cellulose, CMC as host polymer doped with ammonium chloride, AC (0-20 wt.%) as ionic dopant via solution casting technique. The ionic conductivity and transport parameter of SPEs films were analyzed using electrical impedance spectroscopy in the frequency range of 1 Hz-50 MHz at selected temperature of 303-383 K. The highest ionic conductivity of 1.43×10 −3 S/cm was obtained at 16 wt.% AC. Temperature-dependent ionic conductivity showed that the ionic conductivity obeys Arrhenius rule where R 2~1 and thermally assisted. Transport studies showed that the ionic conductivity was influenced by the ionic mobility and diffusion coefficient.
Thermal conductivity was measured using carboxyl methylcellulose (CMC) doped with ammonium chlori... more Thermal conductivity was measured using carboxyl methylcellulose (CMC) doped with ammonium chloride (AC) with varied amounts (0 -12 wt. %) of propylene carbonate (PC) solid bio-polymer electrolytes (SBPs) via solution casting technique. In SBPs system, the frequency dependence of ionic conductivity, ε r , and M i were measured by using an electrical impedance spectroscopy method in the temperature range of 303 -328 K. The highest ionic conductivity on the SBPs system is 1.01 × 10 −2 S cm −1 for a sample containing 8 wt. % of PC. The system was found to obey the Arrhenius rule, where R 2 1. The dielectric studies show non-Debye behaviour for CMC-AC-PC SBPs. It is convenient to trust that the PC is one of the most promising plasticizers to enhance ionic conductivity and performance for SBP system.
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Papers by NUR HIDAYAH BINTI AHMAD 15751