Chitosan-lipid films: microstructure and surface energy

Composite films of chitosan-laurate were shown to have low water permeability, while films containing other fatty acids or esters were not effective in this respect. Electron microscopy revealed the microstructure of these films to be very different, in terms of density, pore formation, channeling,...

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Veröffentlicht in:Journal of agricultural and food chemistry 1992-04, Vol.40 (4), p.540-544
Hauptverfasser: Wong, Dominic W. S, Gastineau, Francois A, Gregorski, Kay S, Tillin, Sandra J, Pavlath, Attila E
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container_end_page 544
container_issue 4
container_start_page 540
container_title Journal of agricultural and food chemistry
container_volume 40
creator Wong, Dominic W. S
Gastineau, Francois A
Gregorski, Kay S
Tillin, Sandra J
Pavlath, Attila E
description Composite films of chitosan-laurate were shown to have low water permeability, while films containing other fatty acids or esters were not effective in this respect. Electron microscopy revealed the microstructure of these films to be very different, in terms of density, pore formation, channeling, surface contour, and packing pattern. The surface energy of the films was estimated, and the dispersion force component (gamma(s)d) and the polar component (gamma(s)p) were calculated. The chitosan-laurate film exhibited higher surface energy, but no variation on either surface, while all other films tested differed in both surface energy components depending on the surface orientation. In general, these physical attributes can be correlated quite well with the permeability characteristics of the particular film. It is postulated that the unique properties of the chitosan-laurate film could suggest the importance of the morphological arrangement of the lipid within the chitosan matrix.
doi_str_mv 10.1021/jf00016a002
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subjects Agriculture
Agriculture, Multidisciplinary
Biological and medical sciences
Chemistry
Chemistry, Applied
Food additives
Food industries
Food Science & Technology
Fundamental and applied biological sciences. Psychology
General aspects
Life Sciences & Biomedicine
Physical Sciences
Science & Technology
title Chitosan-lipid films: microstructure and surface energy
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