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Artículo

Development of Crystal Violet encapsulation in pectin - Arabic gum gel microspheres

Revuelta, Mariana ValeriaIcon ; Chacón Villalba, Elizabeth; Navarro, Alba Sofia del RosarioIcon ; Guida, Jorge AlbertoIcon ; Castro, Guillermo RaulIcon
Fecha de publicación: 09/2016
Editorial: Elsevier Science
Revista: Reactive & Functional Polymers
ISSN: 1381-5148
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Nano-materiales

Resumen

Six pectins with 35% to 91% methoxylation degree were purified and characterized to encapsulate Crystal Violet (CV). Amidated low methoxylated pectin (ALMP) was selected based on microsphere morphologies, aqueous solubility, viscosity and the effect of calcium concentration. Pectin microspheres were stabilized with Arabic gum (AG) and optimized according to the loading. Microspheres composed of 2.0% ALMP-1.0% AG crosslinked with 450 mM calcium(II) were able to encapsulate 217 ± 2 μM CV. Optical microscopy of the gels revealed spheroid microspheres with 250 ± 50 μm diameter containing homogenous CV distribution. Dried microspheres observed by SEM and epifluorescence showed a highly shrinkable matrix keeping the spheroidal morphology. Low relative viscosity of the ALMP-AG-CV solutions was found compared to ALMP and ALMP-AG. The Young moduli (60–80 Pa) of ALMP-AG microspheres by texturometric analysis indicated that the CV could interfere with the gel crosslinking. Raman spectroscopy analysis suggested some interaction of CV nucleophilic center within the matrix. FTIR of the matrix showed largest shifts in the carbonyl and carboxylate groups probably associated to H-bridges. CV stability studies performed on ALMP-AG microspheres, synthetized from polymer solutions with pH values above and below pectin pKa and showed faster CV release rates in presence of ionic strength.
Palabras clave: Crystal Violet , Pectin , Arabic Gum , Microencapsulation , Ionotropic Gelation , Vibrational Spectroscopies , Rheological Studies
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)
Identificadores
URI: http://hdl.handle.net/11336/48525
DOI: https://dx.doi.org/10.1016/j.reactfunctpolym.2016.07.002
URL: https://www.sciencedirect.com/science/article/pii/S1381514816301274
Colecciones
Articulos(CEQUINOR)
Articulos de CENTRO DE QUIMICA INORGANICA "DR. PEDRO J. AYMONINO"
Articulos(CIDCA)
Articulos de CENTRO DE INV EN CRIOTECNOLOGIA DE ALIMENTOS (I)
Articulos(CINDEFI)
Articulos de CENT.DE INV EN FERMENTACIONES INDUSTRIALES (I)
Citación
Revuelta, Mariana Valeria; Chacón Villalba, Elizabeth; Navarro, Alba Sofia del Rosario; Guida, Jorge Alberto; Castro, Guillermo Raul; Development of Crystal Violet encapsulation in pectin - Arabic gum gel microspheres; Elsevier Science; Reactive & Functional Polymers; 106; 9-2016; 8-16
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