INFLUENCE OF THE EXTRACTION-PURIFICATION CONDITIONS ON FINAL PROPERTIES OF ALGINATES OBTAINED FROM BROWN ALGAE (MACROCYSTIS PYRIFERA)

CESAR G. GOMEZ; MARÍA VERÓNICA PEREZ; JORGE E. LOZANO; MARGUERITE RINAUDO; MARCELO VILLAR

Elsevier

Año: 2009 vol. 44 p. 365 - 365

p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 200%; TEXT-ALIGN: justify; mso-layout-grid-align: none">In this work, three methods (ethanol, HCl, and CaCl2 route) of sodium alginate extraction-purification from brown seaweeds (Macrocystis pyrifera) were used in order to study the influence of process conditions on final properties of the polymer. In the CaCl2 route was found that the precipitation step in presence of calcium ions followed by proton-exchange in acid medium clearly gives alginates with the lowest molecular weight and poor mechanical properties. It is well known that the acid treatment degrade the ether bonds