Investigation of thermo-responsive optical properties of a composite hydrogel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F10%3A00023493" target="_blank" >RIV/60461373:22340/10:00023493 - 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

Investigation of thermo-responsive optical properties of a composite hydrogel

Popis výsledku v původním jazyce

Poly(N-isopropylacrylamide) (PNIPAM) hydrogels crosslinked by methylene bisacrylamide (MBA) are known to exhibit a transition from hydrophilic to hydrophobic character at the lower critical solution temperature (LCST) of approximately 32 °C. This transition is normally accompanied by a volume change of the hydrogel. In this paper we describe a novel method of synthesizing composite PNIPAM/alginate particles that change their optical properties (transparency) in response to a temperature change but keepboth their original shape and size. The method is based on loading the NIPAM monomer into a calcium alginate hydrogel and carrying out the polymerization above the LCST. The thermo-responsive optical properties of the composite particles were characterised in detail by optical microscopy and image analysis. The change in transparency as function of temperature was found to be fully reversible but revealed some hysteresis. An optimum value of PNIPAM concentration in the composite hydrogel

Název v anglickém jazyce

Investigation of thermo-responsive optical properties of a composite hydrogel

Popis výsledku anglicky

Poly(N-isopropylacrylamide) (PNIPAM) hydrogels crosslinked by methylene bisacrylamide (MBA) are known to exhibit a transition from hydrophilic to hydrophobic character at the lower critical solution temperature (LCST) of approximately 32 °C. This transition is normally accompanied by a volume change of the hydrogel. In this paper we describe a novel method of synthesizing composite PNIPAM/alginate particles that change their optical properties (transparency) in response to a temperature change but keepboth their original shape and size. The method is based on loading the NIPAM monomer into a calcium alginate hydrogel and carrying out the polymerization above the LCST. The thermo-responsive optical properties of the composite particles were characterised in detail by optical microscopy and image analysis. The change in transparency as function of temperature was found to be fully reversible but revealed some hysteresis. An optimum value of PNIPAM concentration in the composite hydrogel

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

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Projekt

<a href="/cs/project/KJB401280801" target="_blank" >KJB401280801: Biomimetické inženýrství aktivních porézních struktur</a><br>

Návaznosti

R - Projekt Ramcoveho programu EK

Rok uplatnění

2010

Kód důvěrnosti údajů

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

Název periodika

Colloids and Surfaces A: Physicochemical and Engineering Aspects

ISSN

0927-7757

e-ISSN

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Svazek periodika

372

Číslo periodika v rámci svazku

1-3

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

5

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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