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231224s2015 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.5b00717
|2 doi
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|a pubmed24n0829.xml
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|a eng
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| 100 |
1 |
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|a Tzeng, Ping
|e verfasserin
|4 aut
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| 245 |
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|a Polymer-graphene oxide quadlayer thin-film assemblies with improved gas barrier
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|c 2015
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|a Text
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 29.07.2015
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|a Date Revised 02.06.2015
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Layer-by-layer assembly was used to create quadlayers (QLs) of chitosan (CH), poly(acrylic acid) (PAA), CH, and graphene oxide (GO). Electron microscopy confirmed GO coverage over the film and a highly ordered nanobrick wall structure. By varying pH deviation between CH and PAA, a thick and interdiffused polymer matrix was created because of the altered chain conformation. A 5 CH (pH 5.5)/PAA (pH 3)/CH (pH 5.5)/GO QL assembly (48 nm) exhibits very low oxygen permeability (3.9 × 10(-20) cm(3) cm cm(-2) Pa(-1) s(-1)) that matches SiOx barrier coatings. In an effort to maintain barrier performance under high humidity, GO was thermally reduced to increase hydrophobicity of the film. This reduction step increased H2/CO2 selectivity of a 5 QL film from 5 to 215, exceeding Robeson's upper bound limit. This unique water-based multilayer nanocoating is very promising for a variety of gas purification and packaging applications
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|a Journal Article
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|a Stevens, Bart
|e verfasserin
|4 aut
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|a Devlaming, Ian
|e verfasserin
|4 aut
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|a Grunlan, Jaime C
|e verfasserin
|4 aut
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
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|g 31(2015), 21 vom: 02. Juni, Seite 5919-27
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|g volume:31
|g year:2015
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|g month:06
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