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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Study of simple microparticles formation of limonene in modified starch using PGSS - Particles from gas-saturated suspensions

Full text
Author(s):
Machado, L. C. [1] ; Pelegati, V. B. [2] ; Oliveira, A. L. [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Dept Engn Alimentos, FZEA, BR-13635900 Pirassununga, SP - Brazil
[2] INFABiC Natl Inst Sci & Technol Photon Appl Cell, BR-13083859 Campinas, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF SUPERCRITICAL FLUIDS; v. 107, p. 260-269, JAN 2016.
Web of Science Citations: 3
Abstract

Supercritical CO2 was studied for impregnation or encapsulation of essential oils in modified starches via Particle from Gas Saturated Solutions or Suspensions (PGSS). Modified starches were choose as function of its low cost. The advantage of this method over conventional encapsulation that use modified starch via spray drier refers to the low temperatures used and absence of water in the process. Modified starch presents hydrophobic elements and this molecules present amphiphilic character. Usually it is employed in the encapsulation of essences as wall material with excellent volatiles retention due to its polar and nonpolar interface. Considering its hydrophobic characteristics, interactions between the modified starch and supercritical CO2 occurred, resulting in two different structural interactions of the limonene and modified starch in the PGSS (50 degrees C and 60 degrees C at 100 bar and 120 bar). When hydrous ethanol was used in the suspension, impregnation occurred and, when anhydrous ethanol was used, encapsulation occurred. Analysis of particle morphology via scanning electron and confocal microscopy, thermo-oxidative characterization by differential scanning calorimetry and determination of microencapsulated limonene via gas chromatography coupled to mass spectrometry indicated limonene microencapsulation and impregnation occurred despite the highly solubility of limonene in supercritical CO2. The retention of limonene by Purity Gum Ultra (R) was 86% when encapsulated and, 53% when impregnated, similar values to those obtained in conventional microencapsulation methods via a spray drier or via PGSS-drying. (C) 2015 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 12/01221-8 - Study of the particle formation of limonene in matodextrin using RESS (rapid expansion of supercritical solutions)
Grantee:Luciana Cristina Machado
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 10/16665-3 - Green coffee oil extraction by supercritical and pressurized fluid process, and comparison with the composition of coffee oil obtained by pressing for the small producers of the State of São Paulo - concentration analysis of bioactive diterpenes
Grantee:Alessandra Lopes de Oliveira
Support Opportunities: Regular Research Grants
FAPESP's process: 08/00148-0 - Collection and analysis of extracts from seeds of pitanga (Eugenia uniflora L.) obtained by use of supercritical carbon dioxide
Grantee:Alessandra Lopes de Oliveira
Support Opportunities: Regular Research Grants
FAPESP's process: 12/06981-0 - Study of the particle formation and encapsulation using RESS (Rapid Expansion of Supercritical Solutions)
Grantee:Alessandra Lopes de Oliveira
Support Opportunities: Regular Research Grants