Micro and nanoparticles of native and modified cassava starches as carriers of the antimicrobial potassium sorbat

 

Autores
Alzate Calderón, Paola Carolina; Zalduendo, María Mercedes; Gerschenson, Lia Noemi; Flores, Silvia Karina
Tipo de recurso
artículo
Estado
Versión publicada
Año de publicación
2016
País
Argentina
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio
CONICET Digital (CONICET)
Descripción
Cross-linked and/or acetylated cassava starches were synthesized and characterized. The acetylation increased the water retention capacity and the solubility in water while the higher level of cross-linking produced the opposite effect on starch. Native (NCS) and acetylated cassava starches (ACS) were used to generate starch micro- and nanoparticles by the dialysis technique.The nanoparticle fraction was around 1.8 g 100 g1 and 12 g 100 g1 (starch dry basis) for NCS and ACS, respectively. The nanoparticle sizes were around 23?255nm with zeta potential extending from 4 to 44mV, while the microscopic fractions ranged 5?87mm. In addition, the capacity of particles to support potassium sorbate (KS) was tested. NCS and ACS particles supported a similar quantity of KS (1400 ppm) and the presence of antimicrobial decreased the particle size for NCS. The precipitation in ethanol technique was also used to generate microparticles where the particles generated from acetylated starches were smaller (8?58mm) than those from native ones (30?227 mm). The KS content that these particles could incorporate was around 2020 ppm. The applied technique modulated the average dimension of the particles obtained, as well as the antimicrobial retention capacity. These innovative materials could bepotentially helpful for shelf life extension by the contribution to the KS stabilization to be incorporated in the bulk of food products.
Idioma
inglés
OAI Identifier
oai:ri.conicet.gov.ar:11336/46752
Enlace del recurso
http://hdl.handle.net/11336/46752
Nivel de acceso
Acceso abierto
Materia
MICRO- AND NANOPARTICLES
NATIVE AND MODIFIED CASSAVA STARCH
POTASSIUM SORBATE
STARCH CARRIERS
ANTIMICROBIAL
Recubrimientos y Películas
Ingeniería de los Materiales
INGENIERÍAS Y TECNOLOGÍAS
Alimentos y Bebidas
Otras Ingenierías y Tecnologías
INGENIERÍAS Y TECNOLOGÍAS
Nano-materiales
Nanotecnología
INGENIERÍAS Y TECNOLOGÍAS