ITPN   24979
INSTITUTO DE TECNOLOGIA EN POLIMEROS Y NANOTECNOLOGIA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Assay of different alfa-hydroxy acids of natural origin for the synthesis of propionized starches
Autor/es:
M. V. TUPA; M.L. HERRERA; M.L. FORESTI
Lugar:
CABA
Reunión:
Workshop; II Workshop on Bio-degradable Polymers and Biocomposites - III Workshop BIOPURFIL; 2015
Institución organizadora:
ITPN-INTEMA
Resumen:
Recently, propionized starches with degree of substitution (DS) in the range of 0.2 ? 0.3 have gained attention in the clinic sector because of their resistant starch (RS) content. The fermentation of RS in the large bowel favors the production of short chain fatty acids (SCFA). Specific SCFAs present recognized beneficial health effects, with proven usefulness in reducing the incidence of colonic tumors. Most esterified starches are obtained by reaction of the polysaccharide in alkaline aqueous suspension with anhydrides as acylating agents and NaOH as catalyst (pH: 7?9). Drawbacks of this route include the production of large amounts of wastewater. In the current work, we use a novel α-hydroxy acids-catalyzed heterogeneous route for the simple synthesis of propionized starches in absence of solvents. The catalysts assayed were L-tartaric, lactic and citric acids, all of them of natural origin.