Viscoelastic and rheological properties of nanocomposite-forming solutions based on gelatin and montmorillonite

Author(s)

Coronado Jorge, Manuel Fernando ^[1] ; Caicedo Flaker, Christian Humberto ^[2] ; Nassar, Samira Fernandes ^[2] ; Freitas Moraes, Izabel Cristina ^[2] ; Quinta Barbosa Bittante, Ana Monica ^[2] ; do Amaral Sobral, Paulo Jose ^[2]

Affiliation

^[1] Univ Nacl San Martin, Fac Ingn Agroind, Tarapoto - Peru

^[2] Univ Sao Paulo, FZEA, Dept Food Engn, BR-13635900 Pirassununga, SP - Brazil

• Document type: Journal article
• Source: Journal of Food Engineering; v. 120, p. 81-87, JAN 2014.
• Web of Science Citations: 21

Abstract

Interested in developing gelatin-based nanocomposites using a spreading technique, this research aimed to study the effect of nanoparticles concentration on the rheological properties of nanocomposite-forming solutions (NFS) based on gelatin and montmorillonite (MMT). The NFS were produced with 5 and 8 g gelatin/100 g NFS; 30 g glycerol/100 g gelatin and 0, 5, 10 and 15 g MMT/100 g gelatin. Rheological tests were carried out in an AR2000 rheometer. Also, the dispersions of MMT in water were analyzed to determine the pH, the mean diameter, and the zeta-potential. The MMT concentration affected significantly the mean diameter of the dispersed nanoparticles, but only affected the zeta-potential for the 5% gelatin system. The MMT dispersions presented Newtonian behavior with low viscosity. The NFS presented viscoelastic behavior. The sol-gel and gel-sol transition temperatures were affected by the MMT concentration. Moreover, the NFS in the sal domain presented a non-Newtonian behavior affected by the MMT concentration. (C) 2013 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 09/53992-5 - Acquisition of a scanning electron microscope for research on the microstructure of agro-industry raw materials, agro-industry products, and biomaterials
• Grantee: Paulo José do Amaral Sobral
• Support Opportunities: Multi-user Equipment Program
• FAPESP's process: 11/15784-1 - Study of the dispersion of nanoparticles in water and its effect on properties of gelatin-based nanocomposits
• Grantee: Christian Humberto Caicedo Flaker
• Support Opportunities: Scholarships in Brazil - Master