Incorporation of bentonite clay in cassava starch films for the reduction of water vapor permeability.

Autor: Monteiro MKS; Universidade Federal do Rio Grande do Norte, UFRN, Natal, RN 59.078-970, Brazil. Electronic address: mayra.kerolly@gmail.com., Oliveira VRL; Universidade Federal Rural do Semi-Árido, UFERSA, Mossoró, RN 59.625-900, Brazil. Electronic address: vrafaeloliveira@uol.com.br., Santos FKG; Universidade Federal Rural do Semi-Árido, UFERSA, Mossoró, RN 59.625-900, Brazil., Barros Neto EL; Universidade Federal do Rio Grande do Norte, UFRN, Natal, RN 59.078-970, Brazil., Leite RHL; Universidade Federal Rural do Semi-Árido, UFERSA, Mossoró, RN 59.625-900, Brazil., Aroucha EMM; Universidade Federal Rural do Semi-Árido, UFERSA, Mossoró, RN 59.625-900, Brazil., Silva RR; Universidade Federal do Rio Grande do Norte, UFRN, Natal, RN 59.078-970, Brazil., Silva KNO; Universidade Federal do Rio Grande do Norte, UFRN, Natal, RN 59.078-970, Brazil.
Jazyk: angličtina
Zdroj: Food research international (Ottawa, Ont.) [Food Res Int] 2018 Mar; Vol. 105, pp. 637-644. Date of Electronic Publication: 2017 Dec 02.
DOI: 10.1016/j.foodres.2017.11.030
Abstrakt: Complete factorial planning 2 3 was applied to identify the influence of the cassava starch(A), glycerol(B) and modified clay(C) content on the water vapor permeability(WVP) of the cassava starch films with the addition of bentonite clay as a filler, its surface was modified by ion exchange from cetyltrimethyl ammonium bromide. The films were characterized by X-ray diffraction(XRD), fourier transform by infrared radiation(FTIR), atomic force microscopy(AFM) and scanning electron microscopy(SEM). The factorial analysis suggested a mathematical model thats predicting the optimal condition of the minimization of WVP. The influence of each individual factor and interaction in the WVP was investigated by Pareto graph, response surface and the optimization was established by the desirability function. The sequence of the degree of statistical significance of the investigated effects on the WVP observed in the Pareto graph was C>B>A>BC>AC. Interactions AB, BC and AC showed that the modified clay was the factor of greater significance.
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Databáze: MEDLINE
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