Recrystallisation of ferulic acid using the anti-solvent and sonocrystallisation processes

Autor: Taynara Batista Lins Melo, Rui Oliveira de Macêdo, Fábio Santos de Souza, José Venâncio Chaves Júnior, Fabrício Havy Dantas de Andrade, Rayanne Sales Araújo de Batista
Rok vydání: 2019
Předmět:
Zdroj: Journal of Thermal Analysis and Calorimetry. 138:3757-3764
ISSN: 1588-2926
1388-6150
Popis: In the present study, ferulic acid (FA) crystals were obtained via the crystallisation process using two different techniques (anti-solvent and sonocrystallisation), and their solid-state characteristics were evaluated for aqueous solubility. The anti-solvent technique was performed using methanol (FA-M), acetic acid (FA-A), and isopropyl alcohol (FA-I) as solvents and water as the anti-solvent. For sonocrystallisation, the same process was performed using a tip sonicator (FA-Ms, FA-As, FA-Is). X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), thermogravimetry–differential thermal analysis, particle distribution, scanning electron microscopy (SEM), and aqueous solubility analysis were performed. On the diffractogram and FTIR spectrum of FA and the crystals obtained, peaks with similar diffraction angles and absorption bands were observed, with variations in the relative intensity. The DSC and DTA curves of FA and the crystals obtained show a similar peak temperature. The TG curves show a single step of mass loss, but in the crystals this stage occurred at a lower temperature. A decrease in the particle size of the crystals was observed, and consequently, the solubility was improved relative to the drug. SEM is in accordance with particle size and distribution data, with the observation of more regular crystalline structures. Among the crystals studied, FA-I crystal showed greater particle size decrease and improved solubility compared to raw FA, which may lead to improvements in bioavailability and technological properties.
Databáze: OpenAIRE
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