title: Water desorption of cassava starch granules: A study based on thermogravimetric analysis of aqueous suspensions and humid powders.
abstract: This work reports on water desorption from cassava starch in relation with the structure and conditioning of granules in suspensions or after equilibration in desiccators. The experimental work is performed by thermogravimetric analysis with isothermal and non-isothermal protocols and interpreted to derive the activation energies and desorption frequencies according to the humidity range with no adjustable parameter. The analysis points out the different types of water interacting with the starch granules and relates the drying coefficients to their microscopic structure. The work helps clarifying contradictory and partial results from the literature.
authors.affiliation: Department of Food Engineering, Faculty of Animal Science and Food Engineering, University of São Paulo, Pirassununga, SP, Brazil; Laboratoire de Physique Thermique, ESPCI-ParisTech, PSL Research University, 10 Rue Vauquelin, 75231 Paris Cedex 5, France. Electronic address: gayalav1230@gmail.com.
authors.forename: Germán
authors.initials: G
authors.lastname: Ayala Valencia
authors.affiliation: Laboratoire de Physique Thermique, ESPCI-ParisTech, PSL Research University, 10 Rue Vauquelin, 75231 Paris Cedex 5, France.
authors.forename: Madeleine
authors.initials: M
authors.lastname: Djabourov
authors.affiliation: Department of Food Engineering, Faculty of Animal Science and Food Engineering, University of São Paulo, Pirassununga, SP, Brazil.
authors.forename: Paulo José
authors.initials: PJ
authors.lastname: do Amaral Sobral
mesh_terms: D003890:Desiccation; D002365:Manihot / Q000737:chemistry; D008956:Models, Chemical; D011208:Powders; D013213:Starch / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D011208:Powders; D014867:Water; D013213:Starch
keywords: Activation energy; Diffusion rate; Drying; Starch granules; Water desorption