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

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About: Synthesis of PNIPAM/SiO2 and PNIPAM/Fe3O4 microcarries for controlled delivery of molecular and nanoparticle payloads Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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) used for PNIPAM 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) used for PNIPAM (en)
Title	Synthesis of PNIPAM/SiO2 and PNIPAM/Fe3O4 microcarries for controlled delivery of molecular and nanoparticle payloads Synthesis of PNIPAM/SiO2 and PNIPAM/Fe3O4 microcarries for controlled delivery of molecular and nanoparticle payloads (en)
skos:prefLabel	Synthesis of PNIPAM/SiO2 and PNIPAM/Fe3O4 microcarries for controlled delivery of molecular and nanoparticle payloads Synthesis of PNIPAM/SiO2 and PNIPAM/Fe3O4 microcarries for controlled delivery of molecular and nanoparticle payloads (en)
skos:notation	RIV/60461373:22340/10:00023287!RIV11-GA0-22340___
http://linked.open...avai/riv/aktivita	P R S
http://linked.open...avai/riv/aktivity	P(GD104/08/H055), R, S
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Štěpánek, František Tokárová, Viola Čejková, Jitka
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola chemicko-technologická v Praze / Fakulta chemicko-inženýrská
http://linked.open...dnocenehoVysledku	291546
http://linked.open...ai/riv/idVysledku	RIV/60461373:22340/10:00023287
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	thermo-responsive polymer; PNIPAM; Fe3O4; nanoparticles; composite magnetic microcapsules. (en)
http://linked.open.../riv/klicoveSlovo	Fe3O4 PNIPAM nanoparticles composite magnetic microcapsules. thermo-responsive polymer
http://linked.open...ontrolniKodProRIV	[8B72BF8D1731]
http://linked.open...v/mistoKonaniAkce	Praha
http://linked.open...i/riv/mistoVydani	Praha
http://linked.open...i/riv/nazevZdroje	CHISA 2010
http://linked.open...in/vavai/riv/obor	CI
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Transport and reaction processes in complex multiphase systems
http://linked.open...UplatneniVysledku	2010
http://linked.open...iv/tvurceVysledku	Tokárová, Viola Štěpánek, František Čejková, Jitka
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2010-01-01 (xsd:date)
number of pages	8 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Process Engineering Publisher, Novosad, J.
https://schema.org/isbn	978-80-02-02210-7
http://localhost/t...ganizacniJednotka	22340

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