Effect of modified clays on the structure and functional properties of biofilms produced with zein

Food Science and Technology (Campinas)

Luciana Lopes Tavares²  Crislene Barbosa De Almeida²  Ícaro Putinhon Caruso¹  Marinônio Lopes Cornélio¹  José Francisco Lopes Filho² 

[1] ,São Paulo State University Department of Food Engineering and Technology São José do Rio Preto SP ,Brazil

关键词: biofilms;    zein;    clays;    microcomposite;    tactoids;    biofilmes;    zeína;    argilas;    microcompósitos;    tactoides;   

DOI  :  10.1590/S0101-20612012005000056

来源: SciELO

【 摘 要 】

The purpose of this study was to evaluate changes in the structure and some functional properties of biofilms added with modified clays (Cloisite® 15A and Cloisite® 30B) prepared by the casting method. The analysis of the microstructure of the films, scanning electron microscopy (SEM), Optical microscopy (MO), and Infrared Spectroscopy (FTIR) indicated that the addition of clay in the films resulted in the formation of a heterogeneous microstructure, microcomposite or tactoid. Due to the formation of a microcomposite structure, functional properties of the films added with both clays such as opacity, solubility, and permeability to water vapor (PVA), were not better than those of the control film. Thus, it was concluded that although it is possible to produce a film added with modified clays using the casting method, it was not possible to obtain intercalation or exfoliation in a nanocomposite, which would result in improved functional properties.

【 授权许可】

CC BY   
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