About: Xylan sulphate films

Facets (new session)
Description
Metadata
Settings
- owl:sameAs
- Inference Rule:

About: Xylan sulphate films Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Xylan sulphate derivatives with degree of substitution (DS) up to 1.40 at 90% yield for film applications were prepared. The structure and substitution were confirmed by 2D NMR spectroscopy and elemental analysis. The highest DS was obtained by sulphation with sulphur trioxide pyridine complex in N,N-dimethylformamide (DMF) when the least degradative conditions were used. The samples at high DS did not form a compact film. The best mechanical properties of xylan sulphate film were achieved on the partially water soluble derivate with DS 0.07 when sulphated in dimethylsulfoxide (DMSO). It was observed that partially soluble films with low DS and high molar mass of soluble component exhibited better mechanical properties than films with higher DS and low molar mass. This could be explained by adhesion of insoluble components with solubilized xylan sulphate. This was supported also by the shapes of images of samples observed by scanning electron microscopy (SEM). The thermal and thermo-oxidative properties of xylan sulphate were not as good as for films from unmodified xylan, hydroxypropylsulfonated (HPSX) or hydroxypropyltrimethylammonium (HPAX) xylan studied previously. The best mechanical properties obtained on xylan sulphate were superior in comparison to those of HPSX or HPAX. (C) 2011 Elsevier Ltd. All rights reserved. Xylan sulphate derivatives with degree of substitution (DS) up to 1.40 at 90% yield for film applications were prepared. The structure and substitution were confirmed by 2D NMR spectroscopy and elemental analysis. The highest DS was obtained by sulphation with sulphur trioxide pyridine complex in N,N-dimethylformamide (DMF) when the least degradative conditions were used. The samples at high DS did not form a compact film. The best mechanical properties of xylan sulphate film were achieved on the partially water soluble derivate with DS 0.07 when sulphated in dimethylsulfoxide (DMSO). It was observed that partially soluble films with low DS and high molar mass of soluble component exhibited better mechanical properties than films with higher DS and low molar mass. This could be explained by adhesion of insoluble components with solubilized xylan sulphate. This was supported also by the shapes of images of samples observed by scanning electron microscopy (SEM). The thermal and thermo-oxidative properties of xylan sulphate were not as good as for films from unmodified xylan, hydroxypropylsulfonated (HPSX) or hydroxypropyltrimethylammonium (HPAX) xylan studied previously. The best mechanical properties obtained on xylan sulphate were superior in comparison to those of HPSX or HPAX. (C) 2011 Elsevier Ltd. All rights reserved. (en)
Title	Xylan sulphate films Xylan sulphate films (en)
skos:prefLabel	Xylan sulphate films Xylan sulphate films (en)
skos:notation	RIV/60461373:22310/11:43891599!RIV12-MSM-22310___
http://linked.open...avai/predkladatel	Fakulta chemické technologie
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(MSM6046137302)
http://linked.open...iv/cisloPeriodika	1
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Gedeon, Ondrej
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola chemicko-technologická v Praze / Fakulta chemické technologie
http://linked.open...dnocenehoVysledku	242028
http://linked.open...ai/riv/idVysledku	RIV/60461373:22310/11:43891599
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Materials; NMR; SEM; Composite; Film; Xylan (en)
http://linked.open.../riv/klicoveSlovo	Composite Materials SEM NMR Film Xylan
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[7D1D1590B91B]
http://linked.open...i/riv/nazevZdroje	Carbohydrate Polymers
http://linked.open...in/vavai/riv/obor	CD
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	86
http://linked.open...iv/tvurceVysledku	Gedeon, Ondrej Kirschnerová, Soňa Mendichi, Raniero Uhliariková, Iveta Šimkovic, Ivan
http://linked.open...ain/vavai/riv/wos	000293114900028
http://linked.open...n/vavai/riv/zamer	Preparation and research of functional materials and material technologies using micro- and nanoscopic methods
issn	0144-8617
number of pages	5 (xsd:int)
http://localhost/t...ganizacniJednotka	22310
is http://linked.open...avai/riv/vysledek of	Xylan sulphate films Xylan sulphate films

Faceted Search & Find service v1.16.118 as of Jun 21 2024

Alternative Linked Data Documents: ODE Content Formats:

RDF

ODATA

Microdata

About

OpenLink Virtuoso version 07.20.3240 as of Jun 21 2024, on Linux (x86_64-pc-linux-gnu), Single-Server Edition (126 GB total memory, 58 GB memory in use)
Data on this page belongs to its respective rights holders.
Virtuoso Faceted Browser Copyright © 2009-2024 OpenLink Software