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New controlled release systems produced by self-assembly of biopolymers and colloidal particles at fluid-fluid interfaces
Surface aggregating soy protein-pectin solutions are used in the production of biodegradable films intended for food packaging applications. Structural properties of the surface biopolymer network influence the engineering properties of the films, such as permeability and mechanical strength. Soy protein isolates (SPI) - high methoxyl pectin (HMP) films that develop at the air-water interface were therefore investigated by a combined interface theological and ellipsometric approach. The behavior of pure SPI interfacial layer is that of a light cross-linked polymer network with a small regime of linear viscoelasticity response. Since SPI progressively accumulate at the air-water interface, higher protein concentration in the solution does not lead automatically to higher surface coverage but due to restricted unfolding of the proteins to weaker and fluid-like films. The theological behavior of composite SPI-HMP solutions at the air-water interface shows that the HMP addition increases the elastic interfacial modulus. The stabilizing effect in presence of the polysaccharide is attributed to a protein-polysaccharide complex formation at the interface. (C) 2009 Elsevier Ltd. All rights reserved. [hide]
Scientific Board
Andreas Bausch
TU Munich, Germany ►
Peter Fischer
ETH Zurich, Switzerland ►
Anne-Marie Hermansson
SIK, Sweden ►
Martin Kroger
ETH Zurich, Germany/Switzerland ►
Erik van der Linden
Wageningen UR, The Netherlands ►
Niklas Loren
SIK, Sweden ►
Leonard Sagis
Wageningen UR, The Netherlands ►
Erich Windhab
ETH Zurich, Switzerland ►
Klaas-Jan Zuidam
Unilever, The Netherlands ►
Scientific Stuff
Manuela Duxenneuner
ETH Zurich, Switzerland ►
Sophia Fransson
SIK, Sweden ►
Nam-Phuong Humblet-Hua
Wageningen UR, The Netherlands ►
Joeska Husny
ETH Zurich, Australia/Switzerland ►
Orit Peleg
ETH Zurich, Israel/Switzerland ►
Cyrille Vezy
TU Munich, Germany ►
Varvara Mitropoulos
ETH Zurich, Switzerland ►
Associated Scientists
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SY Tee, AR Bausch, PA Janmey,
The mechanical cell
CURRENT BIOLOGY 19 (2009) R745 ►Selected conferences (co-)organized by project members
8th World Congress on Computational Mechanics WCCM8 2008
30 June - 5 July 2007, Venice, Italy ►13 May 2025
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