Abstract
Curcumin was extracted from turmeric plants which is the most commonly used natural pigments, and possess a variety of pharmacological functions except for using pigment. The morphology and particle size of curcumin are main factors affecting the application. Therefore, the morphology and particle size distribution of curcumin were effectively controlled by advanced technology, which is significant for expanding the application and added value of curcumin. The curcumin crystal was obtained from curcumin pigments by using column chromatography and recrystallization techniques. The composition and structure of curcumin were characterized by elementary analysis, UV-Vis, IR and NMR. Micronization of curcumin was carried out the Solution Enhanced Dispersion by Supercritical Fluids (SEDS) technology. In the process, supercritical carbon dioxide was used as anti-solvent and acetone/dichloromethane (1:4, v:v) was used as solvent. The curcumin crystals with PSs of about 378 μm were successfully micronized by the SEDS process to micro particles with PSs of about 2.6-10 μm. The acicular, leaves, dendritic and tubular micro particles were obtained through controlling parameters such as pressure, temperature, solution concentration and solution flow rate.DOI: http://doi.dx.org/10.5564/mjc.v15i0.314 Mongolian Journal of Chemistry 15 (41), 2014, p11-14
Highlights
Curcumin is a highly safety natural food coloring mainly extracted from Araceae plants irises and ginger turmeric, curcuma, turmeric rhizomes, etc., including curcumin, norepinephrine curcumin group, double demethoxyhaleniaside curcumin [1]
Characterization of curcumin: The curcumin crystals were characterized by using elemental analysis, UV, IR and NMR spectra and obtained data was compared with the literature [12]
There are two peaks were appeared at the wavelength of 263 nm and 425 nm suggesting that two kind of substituents (1) on benzene band of curcumin absorption, and (2) on the phenyl ring contained benzene with p-π and π-πconjugated which resulted to red-shifted absorption band
Summary
Curcumin is a highly safety natural food coloring mainly extracted from Araceae plants irises and ginger turmeric, curcuma, turmeric rhizomes, etc., including curcumin (about 77%), norepinephrine curcumin group (about 17%), double demethoxyhaleniaside curcumin (about 3%) [1]. Curcumin is the active ingredient of which is important, and the plant kingdom pigment having extremely rare β-diketone structure, molecular formula C21H20O6, molecular weight 368.37, soluble in methanol, acetone, chloroform, ethanol and propylene glycol, and other organic solvents [2], and glacial acetic acid and alkali solution.
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