Characterization of L‐aspartate crystals grown in gel medium

Abstract

L-Aspartate [C 4 H 7 NO 4 ], also called as 2-aminobutanedoioic acid, an organic amino acid was crystallized with the aid of sodium metasilicate gel. Diffusion of the supersaturated solutions in porous gel network by solubility reduction method in silica gel was carried out in our laboratory. The crystals were characterized using powder X-ray diffraction technique. Fourier transform infrared spectroscopy reveals the presence of functional groups in the crystals. Optical absorbance of the crystals was studied by UV -Visible spectroscopy and the thermal properties were studied by thermo gravimetric analysis.

Polyaspartic acid as a green corrosion inhibitor for carbon steel

“…The viscosity average molecular weight ( M w ) of PASP was determined to be 3100. In contrast to the linkage of aspartic acid in native materials, PASP was obtained by the thermal polycondensing process containing α _ and β _ linked moieties in a constant molar ratio of 30:70 27–29. Figure 1 shows the structure of α _ aspartic acid and β _ aspartic acid.…”