Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/6118
Title: Improvement of barrier and mechanical properties of whey protein isolate based food packaging films by incorporation of zein nanoparticles as a novel bionanocomposite
Authors: Oymacı, Pelin
Alsoy Altınkaya, Sacide
Oymacı, Pelin
Alsoy Altınkaya, Sacide
Keywords: Free volume
Hydrophilicity
Mechanical properties
Water vapor barrier properties
Whey protein isolate
Zein nanoparticle
Issue Date: 1-Mar-2016
Publisher: Elsevier Ltd.
Source: Oymacı, P., and Alsoy Altınkaya, S. (2016). Improvement of barrier and mechanical properties of whey protein isolate based food packaging films by incorporation of zein nanoparticles as a novel bionanocomposite. Food Hydrocolloids, 54, 1-9. doi:10.1016/j.foodhyd.2015.08.030
Abstract: In this study, whey protein isolate (WPI) based bio-nanocomposite films embedded with zein nanoparticles (ZNP) were prepared by solution casting. Nanoparticles were coated with sodium caseinate to obtain a uniform distribution in the films. The mechanical, water vapor barrier, surface wetting, morphological and viscoelastic properties of the films were investigated. The addition of ZNP significantly improved the water vapor barrier and mechanical properties of the WPI without adversely affecting the elongation of the films. Dynamical mechanical analysis and contact angle measurements revealed that upon addition of the nanoparticles, the fractional free volume and hydrophilicity of the WPI films decreased. Sodium caseinate containing both hydrophilic and hydrophobic groups created an efficient interface between the hydrophobic ZNP and hydrophilic WPI matrix, allowing for a homogeneous distribution of nanoparticles even at very high loading levels as evidenced by the scanning electron microscope (SEM) and atomic force microscopy (AFM) images. The WPI/ZNP nanocomposite films can potentially become effective food packaging materials.
URI: http://doi.org/10.1016/j.foodhyd.2015.08.030
http://hdl.handle.net/11147/6118
ISSN: 0268-005X
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Materials Science and Engineering / Malzeme Bilimi ve Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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