About: Rheological study of chitosan acetate solutions containing chitin nanofibrils

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Rheological properties of chitosan acetate solutions containing chitin nanofibrils (n-chitin) and biocompatible plasticizers intended for preparation of biodegradable films are reported in the steady, oscillatory and transient shear flow. The experiments were performed on slurries with an optimum proportion of 65/35 wt.% between chitosan and n-chitin in the films which was determined from our results of mechanical properties and absorption of water vapor. The time-dependent dynamic experiments revealed the chitin nanofibrils as an effective “gelling agent of chitosan phase. The phenomenon is explained by a chitosan-like surface of n-chitin and by the interactions inducing orientational cooperativity of chitosan molecules dissolved in close neighborhood of the anisotropic chitin nanofibrils. Additions of glycerol or poly(ethylene glycol), improving mechanical properties of the films, delay significantly the onset of gelation of chitosan/n-chitin slurries. The effect is induced by an increase in viscosity of the slurries and by their enhanced chaotropic character. Rheological properties of chitosan acetate solutions containing chitin nanofibrils (n-chitin) and biocompatible plasticizers intended for preparation of biodegradable films are reported in the steady, oscillatory and transient shear flow. The experiments were performed on slurries with an optimum proportion of 65/35 wt.% between chitosan and n-chitin in the films which was determined from our results of mechanical properties and absorption of water vapor. The time-dependent dynamic experiments revealed the chitin nanofibrils as an effective “gelling agent of chitosan phase. The phenomenon is explained by a chitosan-like surface of n-chitin and by the interactions inducing orientational cooperativity of chitosan molecules dissolved in close neighborhood of the anisotropic chitin nanofibrils. Additions of glycerol or poly(ethylene glycol), improving mechanical properties of the films, delay significantly the onset of gelation of chitosan/n-chitin slurries. The effect is induced by an increase in viscosity of the slurries and by their enhanced chaotropic character. (en)
Title	Rheological study of chitosan acetate solutions containing chitin nanofibrils Rheological study of chitosan acetate solutions containing chitin nanofibrils (en)
skos:prefLabel	Rheological study of chitosan acetate solutions containing chitin nanofibrils Rheological study of chitosan acetate solutions containing chitin nanofibrils (en)
skos:notation	RIV/61389013:_____/14:00430054!RIV15-AV0-61389013
http://linked.open...avai/riv/aktivita	I
http://linked.open...avai/riv/aktivity	I
http://linked.open...iv/cisloPeriodika	4 November
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Tishchenko, Galina Mikešová, Jana Hašek, Jindřich
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	Ústav makromolekulární chemie AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	42699
http://linked.open...ai/riv/idVysledku	RIV/61389013:_____/14:00430054
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	rheology; chitosan solutions; chitin nanofibrils (en)
http://linked.open.../riv/klicoveSlovo	rheology chitin nanofibrils chitosan solutions
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[9FD39A19F337]
http://linked.open...i/riv/nazevZdroje	Carbohydrate Polymers
http://linked.open...in/vavai/riv/obor	CD
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	112
http://linked.open...iv/tvurceVysledku	Hašek, Jindřich Mikešová, Jana Tishchenko, Galina Morganti, P.
http://linked.open...ain/vavai/riv/wos	000341464600098
issn	0144-8617
number of pages	5 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.carbpol.2014.06.043

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