Facile synthesis of LTA molecular sieve membranes on covalently functionalized supports by using diisocyanates as molecular linkers

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dc.identifier.uri http://dx.doi.org/10.15488/2164
dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/2189
dc.contributor.author Huang, Aisheng
dc.contributor.author Caro, Jürgen
dc.date.accessioned 2017-10-30T13:31:11Z
dc.date.available 2017-10-30T13:31:11Z
dc.date.issued 2011
dc.identifier.citation Huang, A.; Caro, J.: Facile synthesis of LTA molecular sieve membranes on covalently functionalized supports by using diisocyanates as molecular linkers. In: Journal of Materials Chemistry 21 (2011), Nr. 30, S. 11424-11429. DOI: https://doi.org/10.1039/c1jm11549a
dc.description.abstract Much effort has been paid towards the preparation of hydrophilic zeolite LTA membranes, and these zeolite LTA membranes have showed excellent performance in hydrophilic separations. However, there are only a few reports on successful shape-selective separations of gas mixtures on zeolite LTA membranes, most separation factors reported so far were lower than the corresponding Knudsen constants. It is often found that zeolite LTA membranes contain inter-crystalline defects to degrade their separation selectivity, which result from the problems that the isolated crystals on the support surface grow together to form a continuous supported LTA layer. In the present work, via urethane bonds formed by the reaction of isocyanate groups with surface hydroxyls, a facile synthesis method is developed for the seeding-free preparation of supported dense zeolite LTA layers by using 1,4-diisocyanate as a molecular binder to anchor the zeolite nutrients onto the support surface. The α-Al2O3 supported zeolite LTA membrane with a thickness of about 3.5 μm displays molecular sieving performance in gas permeation tests. © 2011 The Royal Society of Chemistry. eng
dc.language.iso eng
dc.publisher Cambridge : Royal Society of Chemistry
dc.relation.ispartofseries Journal of Materials Chemistry 21 (2011), Nr. 30
dc.rights Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
dc.subject Diisocyanates eng
dc.subject Excellent performance eng
dc.subject Facile synthesis eng
dc.subject Functionalized eng
dc.subject Gas permeation tests eng
dc.subject Isocyanate group eng
dc.subject Knudsen eng
dc.subject Molecular binders eng
dc.subject Molecular linkers eng
dc.subject Molecular sieve membranes eng
dc.subject Molecular sieving eng
dc.subject Separation factors eng
dc.subject Separation selectivity eng
dc.subject Surface hydroxyl eng
dc.subject Urethane bonds eng
dc.subject Zeolite LTA eng
dc.subject Crystal defects eng
dc.subject Hydrophilicity eng
dc.subject Molecular sieves eng
dc.subject Sieves eng
dc.subject Surface defects eng
dc.subject Synthesis (chemical) eng
dc.subject Gas permeable membranes eng
dc.subject.ddc 540 | Chemie ger
dc.title Facile synthesis of LTA molecular sieve membranes on covalently functionalized supports by using diisocyanates as molecular linkers
dc.type article
dc.type Text
dc.relation.issn 0959-9428
dc.relation.doi https://doi.org/10.1039/c1jm11549a
dc.bibliographicCitation.issue 30
dc.bibliographicCitation.volume 21
dc.bibliographicCitation.firstPage 11424
dc.bibliographicCitation.lastPage 11429
dc.description.version publishedVersion
tib.accessRights frei zug�nglich


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