Formation of alumina-containing alginate hydrogels via ionotropic gelation, dewatering kinetics and xerogel microstructure

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F14%3A43898211" target="_blank" >RIV/60461373:22310/14:43898211 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Formation of alumina-containing alginate hydrogels via ionotropic gelation, dewatering kinetics and xerogel microstructure

Popis výsledku v původním jazyce

Alumina-containing alginate hydrogels with parallel arrays of highly anisometric capillary pores are prepared by ionotropic gelation of alumina-containing sodium alginate sols with calcium chloride solutions. By osmotic dewatering in polyethylene glycolsolutions and subsequent drying, xerogels are obtained, which are studied by microscopy, image analysis and mercury porosimetry. It has been shown that defect-free drying was possible via osmostic dewatering in polyethylene glycol solutions (PEG with molecular mass 8000 g/mol) and subsequent drying under ambient conditions at room temperature and stepwisely increased higher temperatures (40, 60, 80 and 105 °C). Using microscopic image analysis it has been found that in the hydrogels the pore size is significantly larger on the bottom part (201 +- 57 ?m) than on the top part (106 +- 24 ?m) of samples (slices), evidently due to a syneresis-like phenomenon that affects the top parts more because these are formed at an earlier stage of iono

Název v anglickém jazyce

Formation of alumina-containing alginate hydrogels via ionotropic gelation, dewatering kinetics and xerogel microstructure

Popis výsledku anglicky

Alumina-containing alginate hydrogels with parallel arrays of highly anisometric capillary pores are prepared by ionotropic gelation of alumina-containing sodium alginate sols with calcium chloride solutions. By osmotic dewatering in polyethylene glycolsolutions and subsequent drying, xerogels are obtained, which are studied by microscopy, image analysis and mercury porosimetry. It has been shown that defect-free drying was possible via osmostic dewatering in polyethylene glycol solutions (PEG with molecular mass 8000 g/mol) and subsequent drying under ambient conditions at room temperature and stepwisely increased higher temperatures (40, 60, 80 and 105 °C). Using microscopic image analysis it has been found that in the hydrogels the pore size is significantly larger on the bottom part (201 +- 57 ?m) than on the top part (106 +- 24 ?m) of samples (slices), evidently due to a syneresis-like phenomenon that affects the top parts more because these are formed at an earlier stage of iono

Druh

D - Stať ve sborníku

CEP obor

JH - Keramika, žáruvzdorné materiály a skla

OECD FORD obor

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Projekt

<a href="/cs/project/GAP108%2F12%2F1170" target="_blank" >GAP108/12/1170: Porézní keramika s řízenou elasticitou a tepelnou vodivostí</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the 10th International Conference on Polysaccharides - Glycoscience

ISBN

978-80-86238-70-8

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

159-164

Název nakladatele

Česká chemická společnost

Místo vydání

Praha

Místo konání akce

Prague, Czech Republic

Datum konání akce

22. 10. 2014

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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