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Articles by C.D. Wilfred
Total Records ( 3 ) for C.D. Wilfred
  A.K. Ziyada , Z. Man , T. Murugesan , M.A. Bustam and C.D. Wilfred
  In this study, trihexyltetradecylphosphonium octylsulfosuccinate [P6,6,6,14][docusate] was synthesised by anion metathesis using sodium octylsulfosuccinate salt. The molecular structure of the synthesised IL was confirmed by using 1H NMR and elemental analysis and also physical properties such as density, viscosity and refractive index were studied as a function of temperature at the atmospheric pressure. The experimental values of density and refractive index decrease linearly with increasing temperature. The density, refractive index and viscosity of the present IL at 298.15 K are 0.9631 g cm-3, 1.47190 and 1806.1 mPa.s respectively. The results show that this IL possesses higher viscosity, similar density and refractive index compared to the other trihexyltetradecylphosphonium ILs.
  A.K. Ziyada , C.D. Wilfred and M.A. Bustam
  In the present study, a novel phosphonium-based Dicationic Ionic Liquids (DCILs) were synthesized and characterized using 1H NMR and elemental analysis. Physiochemical properties such as density and viscosity are measured and reported for a temperature range of 293.15 to 353.15 K while the refractive index was measured in the range of 293.15 to 333.15 K. The start and decomposition temperatures are determined at heating rate 10°C min-1. The influence of the spacer alkyl chain on these properties is discussed. The results show that the new DCILs possess lower density higher thermal stability and higher viscosity compare to monocationic ionic liquids.
  M. Shahrom and C.D. Wilfred
  Ionic Liquids (ILs) are organic salts with low melting points (below 100°C) and have been widely promoted as “green solvents” due to their non volatility which results in low impact on the environment and health. Natural occurring amino acids, which are easily obtained, biocompatible and biodegradable, are considered as alternative anions for ILs. Four Amino Acids Ionic Liquids (AAILs) have been synthesized by using 4-vinylbenzyltrimethylammonium, [VBTMA] as the cation and glycine, alanine, serine and proline as the anions. The ILs were characterized by Nuclear Magnetic Resonance (NMR) and Fourier Transform Infrared Spectroscopy (FTIR). The thermal degradation behavior was measured by Thermogravimetric Analysis (TGA) and glass transition temperature measured by Differential Scanning Coulometry (DSC). The result showed that VBTMA Pro gives the highest thermal stability with 178.29°C.
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