Synthesis of PNIPAM/SiO2 and PNIPAM/Fe3O4 microcarries for controlled delivery of molecular and nanoparticle payloads

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F10%3A00023287" target="_blank" >RIV/60461373:22340/10:00023287 - 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

Synthesis of PNIPAM/SiO2 and PNIPAM/Fe3O4 microcarries for controlled delivery of molecular and nanoparticle payloads

Popis výsledku v původním jazyce

Composite microcapsules consisting of a temperature-sensitive polymer poly-N-isopropylacrylamide (PNIPAM) core and shell formed by silica (SiO2) nanoparticles layer were prepared via the Pickering emulsion polymerization. PNIPAM belongs to smart materials, which change their properties by external stimuli. The most interesting phenomenon is the volume change and the hydrophilic/hydrophobic transition. At low temperatures (below the lower critical solution temperature (LCST) ~32 °C), the amide groups interact strongly with water molecules through hydrogen bonding and the polymer swells. At higher temperatures (above LCST), the hydrogen bonds between water and the amide groups are disrupted, water molecules are expelled from PNIPAM, and as a result the polymer network collapses and the particles shrink dramatically. Due to the PNIPAM presence, composite capsules prepared in present work exhibit the good thermo-responsive behaviour as well. In the dependence of cross-linker ratio (fBIS) u

Název v anglickém jazyce

Synthesis of PNIPAM/SiO2 and PNIPAM/Fe3O4 microcarries for controlled delivery of molecular and nanoparticle payloads

Popis výsledku anglicky

Composite microcapsules consisting of a temperature-sensitive polymer poly-N-isopropylacrylamide (PNIPAM) core and shell formed by silica (SiO2) nanoparticles layer were prepared via the Pickering emulsion polymerization. PNIPAM belongs to smart materials, which change their properties by external stimuli. The most interesting phenomenon is the volume change and the hydrophilic/hydrophobic transition. At low temperatures (below the lower critical solution temperature (LCST) ~32 °C), the amide groups interact strongly with water molecules through hydrogen bonding and the polymer swells. At higher temperatures (above LCST), the hydrogen bonds between water and the amide groups are disrupted, water molecules are expelled from PNIPAM, and as a result the polymer network collapses and the particles shrink dramatically. Due to the PNIPAM presence, composite capsules prepared in present work exhibit the good thermo-responsive behaviour as well. In the dependence of cross-linker ratio (fBIS) u

Druh

D - Stať ve sborníku

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

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Projekt

<a href="/cs/project/GD104%2F08%2FH055" target="_blank" >GD104/08/H055: Transportní a reakční procesy v komplexních vícefázových systémech</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>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 statě ve sborníku

CHISA 2010

ISBN

978-80-02-02210-7

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

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Název nakladatele

Process Engineering Publisher, Novosad, J.

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

1. 1. 2010

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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