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Study of the dispersion of nanoparticles in water and its effect on properties of gelatin-based nanocomposits

Grant number: 11/15784-1
Support type:Scholarships in Brazil - Master
Effective date (Start): March 01, 2012
Effective date (End): February 28, 2014
Field of knowledge:Agronomical Sciences - Food Science and Technology - Food Engineering
Principal Investigator:Paulo José do Amaral Sobral
Grantee:Christian Humberto Caicedo Flaker
Home Institution: Faculdade de Zootecnia e Engenharia de Alimentos (FZEA). Universidade de São Paulo (USP). Pirassununga , SP, Brazil

Abstract

The use of nanoparticles as charge of biopolymer-based films has been recently studied, as an alternative to improve the physical properties of the films. However, the amelioration obtained is still limited probably because of problems concerning the dispersion of the nanoparticles in water, particularly when the casting technique is used. Thus, the aims of this project are the following: A) the study of the dispersion of nanoparticles in water, using three different parameters, B) the study of the effect of the dispersion on some physical and functional properties of gelatin films made of those dispersions. The films will be produced by the casting technique, with 5 g gelatin/100 g filmogenic solution and 30 g glycerol/100g gelatin. The nanoparticle concentration in relation to gelatin will be 0, 1, 3, 5, 8%. For the filmogenic solution preparation, the nanoparticles will be dispersed in water by the following techniques: - by agitation using a ultraturrax, at 25000 rpm/30 min., minimum; - with a high energy mill, type SPEX (speed <1200 rpm); - by sonication using an ultrasound machine working at 50 hertz. Besides de montmorillonite concentration, the duration of these treatments will be studied deeply. To study the quality of the nanoparticle dispersion, they will be analyzed by scanning electron and atomic force microscopy, by a quasi elastic light scattering particle size analyzer and by a Zeta potential analyzer. Besides, the nanocomposites films produced with the montmorillonite dispersions will be characterized for thickness, water content, microstructure, by scanning electron and atomic force microscopy, water vapor permeability, mechanical properties by tensile and puncture tests, solubility in water, color and opacity, gloss, glass transition, crystallinity, fourier transform infrared spectroscopy and contact angle.

Scientific publications (4)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
FLAKER, CHRISTIAN H. C.; LOURENCO, RODRIGO V.; BITTANTE, ANA MONICA Q. B.; SOBRAL, PAULO J. A. Montmorillonite dispersion in water affects some physical properties of gelatin based nanocomposites films. BIOINTERFACE RESEARCH IN APPLIED CHEMISTRY, v. 6, n. 2, p. 1093-1098, APR 15 2016. Web of Science Citations: 2.
FLAKER, CHRISTIAN H. C.; LOURENCO, RODRIGO V.; BITTANTE, ANA M. Q. B.; SOBRAL, PAULO J. A. Gelatin-based nanocomposite films: A study on montmorillonite dispersion methods and concentration. Journal of Food Engineering, v. 167, n. A, p. 65-70, DEC 2015. Web of Science Citations: 23.
CORONADO JORGE, MANUEL FERNANDO; ALEXANDRE, ELISABETE M. C.; CAICEDO FLAKER, CHRISTIAN HUMBERTO; QUINTA BARBOSA BITTANTE, ANA MONICA; DO AMARAL SOBRAL, PAULO JOSE. Biodegradable Films Based on Gelatin and Montmorillonite Produced by Spreading. INTERNATIONAL JOURNAL OF POLYMER SCIENCE, 2015. Web of Science Citations: 6.
CORONADO JORGE, MANUEL FERNANDO; CAICEDO FLAKER, CHRISTIAN HUMBERTO; NASSAR, SAMIRA FERNANDES; FREITAS MORAES, IZABEL CRISTINA; QUINTA BARBOSA BITTANTE, ANA MONICA; DO AMARAL SOBRAL, PAULO JOSE. Viscoelastic and rheological properties of nanocomposite-forming solutions based on gelatin and montmorillonite. Journal of Food Engineering, v. 120, p. 81-87, JAN 2014. Web of Science Citations: 21.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.