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

Result code in 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>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Synthesis of PNIPAM/SiO2 and PNIPAM/Fe3O4 microcarries for controlled delivery of molecular and nanoparticle payloads
Original language description
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
Czech name
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Czech description
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Project
<a href="/en/project/GD104%2F08%2FH055" target="_blank" >GD104/08/H055: Transport and reaction processes in complex multiphase systems</a><br>
Continuities
S - Specificky vyzkum na vysokych skolach<br>R - Projekt Ramcoveho programu EK

Publication year
2010
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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