Phase Behavior and Solvation of Lithium Triflate in Ethylene Carbonate

2019 ◽  
Vol 41 (27) ◽  
pp. 99-105 ◽  
Author(s):  
Matthew P. Foley ◽  
Daniel M. Seo ◽  
Christopher J. Worosz ◽  
Paul D. Boyle ◽  
Wesley A. Henderson ◽  
...  
Keyword(s):  
Phase Behavior ◽  
Ethylene Carbonate ◽  
Lithium Triflate

Conductivity-Temperature Dependent Studies on MG49 Doped Lithium Triflate Salt

2015 ◽  
Vol 1107 ◽  
pp. 181-186
Author(s):  
Zaidatul Salwa Mahmud ◽  
N.H.M. Zaki ◽  
R. Zakaria ◽  
Mohamad Faizul Yahya ◽  
Ab Malik Marwan Ali
Keyword(s):  
Ionic Conductivity ◽  
Elevated Temperatures ◽  
Ethylene Carbonate ◽  
Ionic Mobility ◽  
Ionic Conductors ◽  
X Ray Diffraction ◽  
Temperature Dependent ◽  
Lithium Triflate ◽  
Mobility Of Charge Carriers ◽  
Solution Cast

This paper reports on the conductivity-temperature studies of gel polymer electrolytes (GPEs) based on 49% poly (methyl methacrylate) grafted-natural rubber (MG49) doped with lithium triflate salt (LiTf) and plasticized with ethylene carbonate (EC). The GPE films are prepared by solution cast technique. The X-ray diffraction (XRD) studies reveal the polymer electrolyte systems are amorphous. AC impedance spectroscopy is carried out in the temperature range between 303 and 373 K. The magnitudes of conductivity observed are strongly dependent on salt concentration and temperature. The high ionic conductivity at elevated temperatures of GPE is attributed to the high ionic mobility of charge carriers. The ionic migration is seen to follow the VTF behavior and approaches to Arrhenius rule at high and low at temperature. Ionic conductivity relaxation appears to be a characteristic of the ionic polarization and the modulus formalism studies confirmed the GPEs in the present investigation are ionic conductors.

Improved ionic conductivity in guar gum succinate–based polymer electrolyte membrane

2018 ◽  
Vol 30 (8) ◽  
pp. 993-1001 ◽  
Author(s):  
Ahmad Danial Azzahari ◽  
Nur Fazilah Abdul Mutalib ◽  
Muhammad Rizwan ◽  
Cheyma Naceur Abouloula ◽  
Vidhya Selvanathan ◽  
...  
Keyword(s):  
Polymer Electrolyte ◽  
Guar Gum ◽  
Polymer Electrolyte Membrane ◽  
Ethylene Carbonate ◽  
Cost Effective ◽  
Solid Polymer ◽  
Lithium Triflate ◽  
Electrolyte Membrane ◽  
Chemically Modified ◽  
Ester Linkage

Guar gum succinate (GGS) was chemically modified by reacting guar gum with succinic anhydride in the presence of 4-dimethylaminopyridine. Succination was confirmed by Fourier transform infrared (FTIR) spectroscopy with carbonyl bands at 1724 cm−1 and ester linkage at 1567 cm−1 of the succinate group. The resulting amorphous, GGS was used as a polymer host to prepare cost-effective solid polymer electrolyte (SPE) films via incorporating a blend of ethylene carbonate (EC), carboxymethyl cellulose (CMC), lithium triflate (LiTf) and lithium iodide (LiI). SPE system for GGS:EC (1.0:0.6) with 30 wt% LiTf showed highest conductivity of 6.29 × 10−5 S cm−1 and GGS:CMC:EC (0.5:0.5:0.6) with 25 wt% LiI showed highest conductivity of 2.10 × 10−4 S cm−1. FTIR revealed multiple complexation sites for ion mobility indicating that GGS possesses high prospects as a conductive SPE.

scholarly journals Conductivity Studies of Epoxidized PMMA Grafted Natural Rubber Doped Lithium Triflate Gel Polymer Electrolytes

2019 ◽  
Vol 7 (4.14) ◽  
pp. 502
Author(s):  
Khuzaimah Nazir ◽  
Mohamad Fariz Mohamad Taib ◽  
Rosnah Zakaria ◽  
Muhamad Kamil Yaakob ◽  
Oskar Hasdinor Hassan ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Polymer Electrolytes ◽  
Ethylene Carbonate ◽  
Transference Number ◽  
Gel Polymer Electrolytes ◽  
Lithium Triflate ◽  
Casting Technique ◽  
Ionic Transference Number ◽  
Conductor Surface ◽  
Solution Casting Technique

A gel polymer electrolytes (GPEs) comprising of 62.3 mol% of epoxidized-30% poly(methyl methacrylate) grafted natural rubber (EMG30) as a polymer host, LiCF3SO3 as a dopant salt and ethylene carbonate (EC) as a plasticizer was prepared by solution-casting technique. The effect of plasticizer on the EMG30- LiCF3SO3 on the ionic conductivity is explained in terms of the plasticizer loading of the film. The temperature dependence of the conductivity of the polymer films obeys the Vogel-Tamman-Fulcher (VTF) relationship. The ionic transference number is calculated using Wagner’s polarization technique shows that the conducting species are predominantly due ions and hence showed the system is an ionic conductor. Surface morphological analysis showed the sample with the highest conductivity exhibited most homogenous in nature.  

Phase behavior of binary mixtures composed of ethylene carbonate and various organic solvents

2011 ◽  
Vol 43 (1) ◽  
pp. 80-87 ◽  
Author(s):  
Makio Iwahashi ◽  
Tadashi Nozaki ◽  
Kazuyuki Kamaya ◽  
Kenichi Taguchi ◽  
Masahiro Fujita ◽  
...  
Keyword(s):  
Phase Behavior ◽  
Binary Mixtures ◽  
Organic Solvents ◽  
Ethylene Carbonate

Phase Behavior and Solvation of Lithium Triflate γ-Butyrlactone

2019 ◽  
Vol 35 (29) ◽  
pp. 3-8 ◽  
Author(s):  
Matthew P. Foley ◽  
Daniel M. Seo ◽  
Paul D. Boyle ◽  
Wesley A. Henderson ◽  
H. C. De Long ◽  
...  
Keyword(s):  
Phase Behavior ◽  
Lithium Triflate

Phase behavior of cationic and anionic surfactants at low concentrations

1992 ◽  
Vol 50 (1) ◽  
pp. 694-695
Author(s):  
E. Naranjo
Keyword(s):  
Phase Behavior ◽  
Structural Characterization ◽  
Dynamic Systems ◽  
Anionic Surfactants ◽  
Intermolecular Forces ◽  
Stable Form ◽  
Surfactant Mixtures ◽  
Low Concentrations ◽  
Cationic And Anionic Surfactants ◽  
General Method

Equilibrium vesicles, those which are the stable form of aggregation and form spontaneously on mixing surfactant with water, have never been demonstrated in single component bilayers and only rarely in lipid or surfactant mixtures. Designing a simple and general method for producing spontaneous and stable vesicles depends on a better understanding of the thermodynamics of aggregation, the interplay of intermolecular forces in surfactants, and an efficient way of doing structural characterization in dynamic systems.

Solution Properties and Phase Behavior of Ammonium Hexylene Octyl Succinate in Water and Water-Oil System

1970 ◽  
Vol 3 (1) ◽  
Author(s):  
Md. Hamidul Kabir ◽  
Ravshan Makhkamov ◽  
Shaila Kabir
Keyword(s):  
Critical Micelle Concentration ◽  
Phase Behavior ◽  
Liquid Crystalline ◽  
Carbon Number ◽  
Phase Region ◽  
Solution Properties ◽  
Middle Phase ◽  
Two Phase ◽  
Lamellar Liquid Crystal ◽  
Drug Ingredient

The solution properties and phase behavior of ammonium hexylene octyl succinate (HOS) was investigated in water and water-oil system. The critical micelle concentration (CMC) of HOS is lower than that of anionic surfactants having same carbon number in the lipophilic part. The phase diagrams of a water/ HOS system and water/ HOS/ C10EO8/ dodecane system were also constructed. Above critical micelle concentration, the surfactant forms a normal micellar solution (Wm) at a low surfactant concentration whereas a lamellar liquid crystalline phase (La) dominates over a wide region through the formation of a two-phase region (La+W) in the binary system. The lamellar phase is arranged in the form of a biocompatible vesicle which is very significant for the drug delivery system. The surfactant tends to be hydrophilic when it is mixed with C10EO8 and a middle-phase microemulsion (D) is appeared in the water-surfactant-dodecane system where both the water and oil soluble drug ingredient can be incorporated in the form of a dispersion. Hence, mixing can tune the hydrophile-lipophile properties of the surfactant. Key words: Ammonium hexylene octyl succinate, mixed surfactant, lamellar liquid crystal, middle-phase microemulsion. Dhaka Univ. J. Pharm. Sci. Vol.3(1-2) 2004 The full text is of this article is available at the Dhaka Univ. J. Pharm. Sci. website

Sign in / Sign up

Export Citation Format

Share Document