TY - JOUR
T1 - Modeling the effect of glycerol on the moisture sorption behavior of whey protein edible films
AU - Coupland, John N.
AU - Shaw, Niamh B.
AU - Monahan, Frank J.
AU - Dolores O'Riordan, E.
AU - O'Sullivan, Michael
N1 - Funding Information:
This work was funded by a grant from the EU Regional Development Fund.
PY - 2000/1
Y1 - 2000/1
N2 - Moisture sorption isotherms (aw = 0.115-0.94) were measured for a series of whey protein isolate (WPI) edible films prepared with different amounts of glycerol as a plasticizer (glycerol:total non-volatile material G = 0-0.5) and for native WPI. The moisture sorption characteristics of the native protein were similar to those of the G = 0 films and the equilibrium moisture content of the films increased linearly with G at all humidities. The Guggenheim-Anderson-de Boer was superior to either the Peleg or BET model as a model for the measured isotherms. The equilibrium moisture content of the films, M, was modeled using a four-parameter empirical model, M = k1exp(k2aw)+k3exp(k4aw)G, where k1-4 are 0.0016, 2.72, 0.0046, and 6.24, respectively (r = 0.98).
AB - Moisture sorption isotherms (aw = 0.115-0.94) were measured for a series of whey protein isolate (WPI) edible films prepared with different amounts of glycerol as a plasticizer (glycerol:total non-volatile material G = 0-0.5) and for native WPI. The moisture sorption characteristics of the native protein were similar to those of the G = 0 films and the equilibrium moisture content of the films increased linearly with G at all humidities. The Guggenheim-Anderson-de Boer was superior to either the Peleg or BET model as a model for the measured isotherms. The equilibrium moisture content of the films, M, was modeled using a four-parameter empirical model, M = k1exp(k2aw)+k3exp(k4aw)G, where k1-4 are 0.0016, 2.72, 0.0046, and 6.24, respectively (r = 0.98).
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U2 - 10.1016/S0260-8774(99)00129-6
DO - 10.1016/S0260-8774(99)00129-6
M3 - Article
AN - SCOPUS:0033639809
SN - 0260-8774
VL - 43
SP - 25
EP - 30
JO - Journal of Food Engineering
JF - Journal of Food Engineering
IS - 1
ER -