| Combining asymmetrical flow field-flow fractionation with light-scattering and inductively coupled plasma mass spectrometric detection for characterization of nanoclay used in biopolymer nanocomposites. | |
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MedLine Citation:
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PMID: 19927249 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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It is expected that biopolymers obtained from renewable resources will in due course become fully competitive with fossil fuel-derived plastics as food-packaging materials. In this context, biopolymer nanocomposites are a field of emerging interest since such materials can exhibit improved mechanical and barrier properties and be more suitable for a wider range of food-packaging applications. Natural or synthetic clay nanofillers are being investigated for this purpose in a project called NanoPack funded by the Danish Strategic Research Council. In order to detect and characterize the size of clay nanoparticulates, an analytical system combining asymmetrical flow field-flow fractionation (AF(4)) with multi-angle light-scattering detection (MALS) and inductively coupled plasma mass spectrometry (ICP-MS) is presented. In a migration study, we tested a biopolymer nanocomposite consisting of polylactide (PLA) with 5% Cloisite30B (a derivatized montmorillonite clay) as a filler. Based on AF(4)-MALS analyses, we found that particles ranging from 50 to 800 nm in radius indeed migrated into the 95% ethanol used as a food simulant. The full hyphenated AF(4)-MALS-ICP-MS system showed, however, that none of the characteristic clay minerals was detectable, and it is concluded that clay nanoparticles were absent in the migrate. Finally, by means of centrifugation experiments, a platelet aspect ratio of 320 was calculated for montmorillonite clay using AF(4)-MALS for platelet size measurements. |
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Authors:
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B Schmidt; J H Petersen; C Bender Koch; D Plackett; N R Johansen; V Katiyar; E H Larsen |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment Volume: 26 ISSN: 1944-0057 ISO Abbreviation: Food Addit Contam Part A Chem Anal Control Expo Risk Assess Publication Date: 2009 Dec |
Date Detail:
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Created Date: 2009-11-20 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101485040 Medline TA: Food Addit Contam Part A Chem Anal Control Expo Risk Assess Country: England |
Other Details:
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Languages: eng Pagination: 1619-27 Citation Subset: IM |
Affiliation:
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Department of Basic Sciences and Environment, University of Copenhagen, Frederiksberg, C DK-1871, Denmark. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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