Biodegradable nanocomposites obtained by ball milling of pectin and montmorillonites

Two composites of apple peel pectin with 3% of either a natural or an organically modified montmorillonite clay, were prepared using a new alternative method, that relies on solid-state mixing at room temperature high energy ball milling(HEBM). This technique involves an efficient mixing of the orga...

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Bibliographic Details
Published in:Carbohydrate polymers 2006-01, Vol.64 (4), p.516-523
Main Authors: Mangiacapra, Pasqualina, Gorrasi, Giuliana, Sorrentino, Andrea, Vittoria, Vittoria
Format: Article
Language:English
Subjects:
apple peels
apples
Applied sciences
Ball milling
biodegradability
Biodegradable polymer
biodegradable products
composite polymers
Composites
Exact sciences and technology
Forms of application and semi-finished materials
Malus
mechanical properties
montmorillonite
Nanocomposites
nanotechnology
Pectin
pectins
Polymer industry, paints, wood
Technology of polymers
thermal properties
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Summary:Two composites of apple peel pectin with 3% of either a natural or an organically modified montmorillonite clay, were prepared using a new alternative method, that relies on solid-state mixing at room temperature high energy ball milling(HEBM). This technique involves an efficient mixing of the organic and inorganic components by mechanical grinding. The milled powders were cast by water as films and characterized. The absence of the peak, corresponding to the basal spacing of the clay, in the X-ray diffractograms of the composite samples allowed us to suggest that the dispersion of the clay inside the pectin matrix takes place with the exfoliation of the clay sheets. The physical properties such as thermal degradation, elastic modulus, sorption and diffusion of water vapour and oxygen were analysed. It was found that they all were improved in the nanocomposites, in particular in the sample containing the natural sodium montmorillonite.
ISSN:0144-8617
1879-1344
DOI:10.1016/j.carbpol.2005.11.003