Abstract
The effectiveness of 1,4-butanediol diglycidyl ether (BDDGE) as a cross-linking agent of bovine gelatin films plasticized with D-sorbitol intended for food packaging is reported. Free-standing films were produced by casting gelatin film-forming solutions containing D-soritol 30 % (g/100 g dry gelatin) and variable amounts of BDDGE (0–3 g/100 g dry gelatin). The addition of 1 % BDDGE (g/100 g dry gelatin) positively influenced the solubility, water vapor permeability, and mechanical properties of the produced films. Water solubility decreased about 77 %; the water vapor permeability enhanced 20 %, and the stretching ability increased 11 times while the tensile strength was reduced up to 7-fold with regard to the non-cross-linked counterpart. A simple extraction procedure was applied to remove the potential un-reacted BDDGE and its hydrolysis products from BDDGE-treated gelatin films. Quantification was performed by gas chromatography combined with mass spectrometry (GC/MS), being lower than 0.25 μg/kg (below the limit of detection, 0.30 μg/L). Results suggested that water-soluble BDDGE may provide an effective cross-linking alternative to the usual aldehyde-based strategy to manufacture gelatin films with potential use as biodegradable food packaging materials.
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This research was financed by Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET, grant number PIP 112-201101-00637) and Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT, grant number PICT 2010-1791) of Argentina. Authors want to express their gratitude to Rousselot (Argentina) for kindly providing the bovine gelatin used in this study.
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Martucci, J.F., Espinosa, J.P. & Ruseckaite, R.A. Physicochemical Properties of Films Based on Bovine Gelatin Cross-linked with 1,4-Butanediol Diglycidyl Ether. Food Bioprocess Technol 8, 1645–1656 (2015). https://doi.org/10.1007/s11947-015-1524-x
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DOI: https://doi.org/10.1007/s11947-015-1524-x