RT Journal Article
T1 Water sorption isotherms of different sodium alginates : thermodynamic evaluation and influence of  mannuronate-guluronate copolymers
A1 Montes, Leticia
A1 Gisbert Verdú, Mauro
A1 Moreira Martínez, Ramón Felipe
AB Water desorption isotherms of three alginates with different structural features were determined at 25, 37, and 50°C. The Halsey model was selected to fit the equilibrium water  sorption  data.  Differential  and  integral  enthalpy  and  entropy  were  estimated  for tested alginates. Optimal storage conditions of tested alginates (moisture content from    0.15   to  0.20 kg water/kg dry   solid    and   relative humidity from    35%   to  50%)    were determined  from  the  maximum  and  minimum  integral  enthalpy  and  entropy  values,  respectively. A model was proposed to estimate the water sorption isotherms of al-ginates based on the alginate monomers (mannuronate, M, and guluronate, G) at low water activity (<0.4). M fraction was mainly responsible for the hygroscopicity of algi-nates. Alginates with similar G fraction showed different hygroscopic features by the presence of more homopolymeric G blocks that could form helical structures at low moisture content, decreasing the water affinity
PB Wiley
SN 0145-8892
YR 2022
FD 2022
LK http://hdl.handle.net/10347/30743
UL http://hdl.handle.net/10347/30743
LA eng
NO Montes, L., Gisbert, M., & Moreira, R. (2022). Water sorption isotherms of different sodium alginates: Thermodynamic evaluation and influence of mannuronate-guluronate copolymers. Journal of Food Processing and Preservation, 46, e17179. https://doi.org/10.1111/jfpp.17179
NO Authors acknowledge the financial support of the Spanish Ministry of Science and Innovation (Project RTI2018-095919-B-C2) and the European Regional Development Fund (FEDER) and Xunta de Galicia (Consolidation Project ED431B 2019/01)
DS Minerva
RD 24 abr 2026