Development of whey protein isolate based nanocomposite food packaging film incorporated with chitosan and zein nanoparticles
tarafından
 
Oymacı, Pelin, author.

Başlık
Development of whey protein isolate based nanocomposite food packaging film incorporated with chitosan and zein nanoparticles

Yazar
Oymacı, Pelin, author.

Yazar Ek Girişi
Oymacı, Pelin, author.

Fiziksel Tanımlama
xi, 68 leaves:+ 1 computer laser optical disc.

Özet
The purpose of this study was to investigate the effect of chitosan and zein nanoparticles addition on the barrier and mechanical properties of whey protein isolate (WPI) films as an alternative to conventional synthetic packaging materials. Chitosan nanoparticles (CSNP) were produced via ionic gelation method using sodium tripolyphosphate (TPP) and deacetylated chitosan. Zein nanoparticles (ZNP) were synthesized based on antisolvent procedure in the presence of sodium caseinate (SC) to enable dispersion in water. Both plain and nanoparticle added WPI films were prepared by solution casting method. Water vapor barrier and mechanical properties of films were measured and the improvements in these properties with nanoparticle addition was further investigated through surface wetting, morphological, viscoelastic and thermal properties of the films. Both nanoparticles significantly decreased the water vapor permeability (WVP) and improved the mechanical properties of the WPI film. The highest enhancement in barrier and mechanical properties of the WPI films were recorded with 20% (w/w of WPI) CSNP and 120% (w/w of WPI) ZNP addition which corresponded to the maximum nanoparticle loading levels. At these loadings, the average WVP of pure WPI films loaded with ZNP and CSNP decreased by 84% and 57%, and the average tensile strength increased by 304% and 161%, respectively. On the other hand, the nanoparticles did not change the elongation at break significantly. ZNP was found more effective than CSNP in improving barrier and mechanical properties of the WPI films due to its hydrophobic nature and better dispersion in the protein matrix which allowed much higher loadings compared with the maximum loading levels achieved with CSNP. CSNP addition imparted antibacterial activity to the WPI films.

Konu Başlığı
Food -- Packaging
 
Food -- Packaging -- Materials
 
Biopolymers -- Mechanical properties
 
Nanocomposites (Materials)

Yazar Ek Girişi
Alsoy Altınkaya, Sacide

Tüzel Kişi Ek Girişi
İzmir Institute of Technology. Materials Science and Engineering.

Tek Biçim Eser Adı
Thesis (Master)--İzmir Institute of Technology: Materials Science and Engineering..
 
İzmir Institute of Technology: Materials Science and Engineering--Thesis (Master).

Elektronik Erişim
Access to Electronic Versiyon.


LibraryMateryal TürüDemirbaş NumarasıYer NumarasıDurumu/İade Tarihi
IYTE LibraryTezT001247TP374 .O96 2014Tez Koleksiyonu