Synthesis and Thermal Properties of Amino Acids Ionic Liquids (AAILS)

Ionic Liquids (ILs) are organic salts with low melting points (below 100 degree 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 degree C.