| Physical and Water Sorption Properties of Chemically Modified Pectin with an Environmentally Friendly Process. | |
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MedLine Citation:
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PMID: 21553919 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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A green process was followed to modify pectin samples under solvent free conditions, obtaining pectin at increasing concentration of palmitic, oleic, and linoleic acids. The weight loss of the modified powders showed a degradation path very similar to the pure pectin, indicating that the pristine structure was preserved after the chemical modification. A decreasing mass of evaporating water on increasing the fatty acid concentration, in particular for the palmitic acid modification, indicated a reduced water sorption by the modified powders. Differential Scanning Calorimetry confirmed the TGA results, and in addition indicated the crystallization of the lateral chains in the case of palmitic acid modified pectins. This result was confirmed by X-ray diffractograms of the palmitic acid samples, indicating the main crystallization of the form C, although possible orientation phenomena can be inferred. The sorption curves of either the pristine pectin or the modified samples showed a dual sorption behavior. The sorption curves were interpreted by the BET and GAB equations, both giving very similar results. Palmitic modification was very effective in reducing all the sorption parameters, whereas in the case of oleic and linoleic acids only at high concentrations the hydrophobic influence was detected. |
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Authors:
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Luca Monfregola; Valeria Bugatti; Pietro Amodeo; Stefania De Luca; Vittoria Vittoria |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-5-10 |
Journal Detail:
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Title: Biomacromolecules Volume: - ISSN: 1526-4602 ISO Abbreviation: - Publication Date: 2011 May |
Date Detail:
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Created Date: 2011-5-10 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100892849 Medline TA: Biomacromolecules Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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