2010
DOI: 10.1590/s0104-66322010000100015
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Water activity of aqueous solutions of ethylene oxide-propylene oxide block copolymers and maltodextrins

Abstract: -The water activity of aqueous solutions of EO-PO block copolymers of six different molar masses and EO/PO ratios and of maltodextrins of three different molar masses was determined at 298.15 K. The results showed that these aqueous solutions present a negative deviation from Raoult's law. The FloryHuggins and UNIFAC excess Gibbs energy models were employed to model the experimental data. While a good agreement was obtained with the Flory-Huggins equation, discrepancies were observed when predicting the experi… Show more

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Cited by 11 publications
(9 citation statements)
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“…In any case, this view suggests that water activity of an aqueous solution is fundamentally reflected by only the nature of the water interactions occurring within it. Despite the best attempts to remedy such over-simplification ( Altunakar & Labuza, 2008 ), the interpretation of water activity in terms of “free water” still persists ( Carareto et al, 2010 , Frosch et al, 2010 , Guine et al, 2015 ).…”
Section: Introductionmentioning
confidence: 99%
“…In any case, this view suggests that water activity of an aqueous solution is fundamentally reflected by only the nature of the water interactions occurring within it. Despite the best attempts to remedy such over-simplification ( Altunakar & Labuza, 2008 ), the interpretation of water activity in terms of “free water” still persists ( Carareto et al, 2010 , Frosch et al, 2010 , Guine et al, 2015 ).…”
Section: Introductionmentioning
confidence: 99%
“…MD is a linear-chain polymer of glucose, with broad applicability in industry as a cheap, almost tasteless, noncrystallizing carrier for many food ingredients and pharmaceuticals. It is usually obtained from starch, either by enzymatic or by combined enzymatic-heat treatment . MDs are commercialized with different values of dextrose equivalent (DE), which is the degree of starch hydrolysis.…”
Section: Introductionmentioning
confidence: 99%
“…As amostras de extratos secoscontendo maltodextrina como adjuvante apresentaram alta solubilidade, também favorecida pela adição da goma arábica (Tabela 15). A maltodextrina é um polímero de cadeia linear de glicose com ampla aplicabilidade na indústria de alimentos e farmacêutica por ser de baixo custo, quase insípido e não cristalino (CACARETO et al, 2010).…”
Section: Microscopia Eletrônica De Varredura (Mev)unclassified