Preparation and evaluation of the barrier properties of cellophane membranes modified with fatty acids

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abstract

Cellophane (regenerated cellulose) membranes with tailored properties regarding hydrophobic character and barrier effects were prepared by their controlled heterogeneous esterification with two fatty acid derivatives (hexanoyl and dodecanoyl chlorides) The characterization of the modified membranes was performed by FUR spectroscopy X-ray diffraction and thermogravimetry confirming the success of the heterogeneous modification reaction while keeping cellophane membranes structural properties Contact angle measurements clearly confirm the enhanced hydrophobic character displayed by the modified cellophane membranes The evaluation of their barrier properties was carried out by determining the permeability towards water vapor at different relative humidities and the permeability towards nitrogen oxygen and carbon dioxide using the time-lag method in both wet and dry states A decrease in both the water permeation and the permeability towards these gases in the wet state was observed for the modified membranes No significant differences in behavior were found between the membranes prepared with hexanoyl and dodecanoyl chloride regarding hydrophobicity but the different lengths of the chain allowed a fine tune of the permeability The obtained cellophane membranes are a good example of the development of new bio-based materials with improved surface and barrier properties (C) 2010 Elsevier Ltd All rights reserved

keywords

WATER-VAPOR PERMEABILITY; CELLULOSE FIBERS; MECHANICAL-PROPERTIES; HYDROPHOBIC FILMS; GAS-PERMEABILITY; EDIBLE FILMS; PERMEATION; ESTERIFICATION; TRANSPORT; SORPTION

subject category

Chemistry; Polymer Science

authors

Tome, LC; Goncalves, CMB; Boaventura, M; Brandao, L; Mendes, AM; Silvestre, AJD; Neto, CP; Gandini, A; Freire, CSR; Marrucho, IM

our authors

foto Alessandro Gandini

Alessandro Gandini

Researcher
foto Armando Jorge Domingues Silvestre

Armando Jorge Domingues Silvestre

Full professor
foto Carlos Pascoal Neto

Carlos Pascoal Neto

Raiz Director
foto Carmen Sofia da Rocha Freire Barros

Carmen Sofia da Rocha Freire Barros

Coordinating Researcher
foto Isabel Maria Delgado Jana Marrucho Ferreira

Isabel Maria Delgado Jana Marrucho Ferreira

Full professor
foto Liliana C. Tomé

Liliana C. Tomé

PhD Student

Groups

G4 - Renewable Materials and Circular Economy

Projects

Controlled chemical modification of polysaccharides for the development of novel materials (PTDC/QUI/68472/2006 )

acknowledgements

Liliana C Tome thanks the FCT (Fundacao para a Ciencia e a Tecnologia) for awarding a research grant (PTDC/QUI/68472/2006)

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Publication Details

type
Journal Article
year
2011
journal
CARBOHYDRATE POLYMERS
volume
83
publisher
ELSEVIER SCI LTD
issn
0144-8617
issue
2
digital object identifier
10.1016/j.carbpol.2010.08.060
web of science article identifier
WOS:000285437000072

Journal Metrics (JCR 2019)

Journal Impact Factor
7.182
Journal Impact Factor (5 yrs)
6.89
category normalized journal percentile
96.638

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