Agricultural and Biosystems Engineering Publications
Campus Units
Agricultural and Biosystems Engineering, Food Science and Human Nutrition, Materials Science and Engineering
Document Type
Article
Publication Version
Accepted Manuscript
Publication Date
7-2013
Journal or Book Title
Journal of Food Engineering
Volume
117
Issue
1
First Page
133
Last Page
140
Research Focus Area(s)
Biological and Process Engineering and Technology
DOI
10.1016/j.jfoodeng.2013.01.046
Abstract
Whey protein isolate (WPI) films embedded with TiO2@@SiO2 (porous silica (SiO2) coated titania (TiO2)) nanoparticles for improved mechanical properties were prepared by solution casting. A WPI solution of 1.5 wt% TiO2@@SiO2 nanoparticles was subjected to sonication at amplitudes of 0, 16, 80 and 160 μm prior to casting in order to improve the film forming properties of protein and to obtain a uniform distribution of nanoparticles in the WPI films. The physical and mechanical properties of the films were determined by dynamic mechanical analysis (DMA), thermogravimetric analysis (TGA), and tensile testing. Water vapor permeability (WVP) measurements revealed that the water vapor transmission rates are slightly influenced by sonication conditions and nanoparticle loading. The DMA results showed that, at high sonication levels, addition of nanoparticles prevented protein agglomeration. The thermal stability of the materials revealed the presence of 3–4 degradation stages in oxidizing the protein films. The addition of nanoparticles strengthens the WPI film, as evidenced by tensile stress analysis. Sonication improved nanoparticle distribution in film matrix; such films can potentially become effective packaging materials to enhance food quality and safety.
Copyright Owner
Elsevier Ltd.
Copyright Date
2013
Language
en
File Format
application/pdf
Recommended Citation
Kadam, Dattatreya M.; Thunga, Mahendra; Wang, Sheng; Kessler, Michael R.; Grewell, David A.; Lamsal, Buddhi P.; and Yu, Chenxu, "Preparation and characterization of whey protein isolate films reinforced with porous silica coated titania nanoparticles" (2013). Agricultural and Biosystems Engineering Publications. 838.
https://lib.dr.iastate.edu/abe_eng_pubs/838
Included in
Bioresource and Agricultural Engineering Commons, Food Chemistry Commons, Nanoscience and Nanotechnology Commons, Polymer and Organic Materials Commons
Comments
This is a manuscript of an article published as Kadam, Dattatreya M., Mahendra Thunga, Sheng Wang, Michael R. Kessler, David Grewell, Buddhi Lamsal, and Chenxu Yu. "Preparation and characterization of whey protein isolate films reinforced with porous silica coated titania nanoparticles." Journal of Food Engineering 117, no. 1 (2013): 133-140. DOI: 10.1016/j.jfoodeng.2013.01.046. Posted with permission.