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Structure and antibacterial properties of polyethylene/organo-vermiculite composites

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dc.title Structure and antibacterial properties of polyethylene/organo-vermiculite composites en
dc.contributor.author Hundáková, Marianna
dc.contributor.author Tokarský, Jonáš
dc.contributor.author Valášková, Marta
dc.contributor.author Slobodian, Petr
dc.contributor.author Pazdziora, Erich
dc.contributor.author Kimmer, Dušan
dc.relation.ispartof Solid State Sciences
dc.identifier.issn 1293-2558 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2015
utb.relation.volume 48
dc.citation.spage 197
dc.citation.epage 204
dc.type article
dc.language.iso en
dc.publisher Elsevier Masson SAS
dc.identifier.doi 10.1016/j.solidstatesciences.2015.08.011
dc.relation.uri https://www.sciencedirect.com/science/article/pii/S1293255815300315
dc.subject Antibacterial activity en
dc.subject Molecular modeling en
dc.subject Organo-vermiculite nanofiller en
dc.subject Polyethylene en
dc.subject X-ray diffraction en
dc.description.abstract Vermiculite (VER) was modified by cation exchange with hexadecyltrimethylammonium (HDTMA+) bromide in three concentrations and used as organo-VER clay mineral nanofillers (denoted as HDTMA+1-VER, HDTMA+2-VER, and HDTMA+3-VER) in polyethylene (PE). PE/organo-VER composites were prepared via a melt compounding technique and pressed into thin plates. The organo-VER nanofillers and composite plates were characterized by X-ray diffraction analysis which in combination with molecular modeling confirmed the intercalation of HDTMA+ molecules. It was found that alkyl tails of HDTMA+ molecules create a non-polar, water-free area which may help the PE chains to enter the VER interlayer space. The nanocomposite structure was confirmed for PE/HDTMA+3-VER. PE/organo-VER composites were also studied by scanning electron microscopy and light microscopy and by creep testing. Antibacterial activity of powder organo-VER nanofillers was tested on Gram-positive (G+) (Staphylococcus aureus, Enterococcus faecalis) and Gram-negative (G-) (Escherichia coli) bacterial strains. The most sensitive G+ bacteria responded by stopping their bacterial growth after 24 h with a minimum inhibitory concentration (MIC) 0.014% (w/v) at all samples. Growth of G- bacteria was inhibited after 24 h with higher MIC value 0.041-10% (w/v) in relation to the content of HDTMA+ in samples. The surfaces of PE/organo-VER composites are very active against G+ bacterial strain E. faecalis. The number of bacterial colonies forming units (cfu) on surfaces of samples was reduced by approximately several orders. The number of bacterial colonies after 48 h was 0 cfu on the surface of PE/HDTMA+3-VER nanocomposite. © 2015 Elsevier Masson SAS. All rights reserved. en
utb.faculty University Institute
dc.identifier.uri http://hdl.handle.net/10563/1005647
utb.identifier.rivid RIV/70883521:28610/15:43873185!RIV16-MSM-28610___
utb.identifier.obdid 43873616
utb.identifier.scopus 2-s2.0-84941554293
utb.identifier.wok 000363347800030
utb.identifier.coden SSSCF
utb.source j-wok
dc.date.accessioned 2015-10-19T08:16:06Z
dc.date.available 2015-10-19T08:16:06Z
dc.description.sponsorship IT4Innovations Centre of Excellence project [CZ.1.05/1.1.00/02.0070]; Ministry of Education, Youth and Sports of Czech Republic [SP2014/82]; operational program Research and Development for Innovations - European Regional Development Fund (ERDF); National Budget of the Czech Republic [CZ.1.05/2.1.00/03.0111]
utb.ou Centre of Polymer Systems
utb.contributor.internalauthor Slobodian, Petr
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