About: Investigation of internal microstructure and thermo-responsive properties of composite PNIPAM/silica microcapsules

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About: Investigation of internal microstructure and thermo-responsive properties of composite PNIPAM/silica microcapsules 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 thermo-responsive hydrogel poly-N-isopropylacrylamide (PNIPAM) and coated by silica (SiO(2)) nanoparticles have been synthesized by the inverse Pickering emulsion polymerization method. The composite capsules, whose mean diameter is in the 25-86 microm range in the expanded state, were characterized by static light scattering, atomic force microscopy (AFM), scanning electron microscopy (SEM), and laser scanning confocal microscopy (LSCM). It is reported that the hydrogel surface is uniformly covered by a monolayer of silica nanoparticles and that depending on the capsule size and degree of polymer cross-linking, either hollow-core or partially-filled hydrogel-core microcapsules can be created. Equilibrium thermo-responsive behavior of the composite microcapsules is investigated and it is found that after heating the particles above the lower critical solution temperature (LCST) of PNIPAM, the shrinkage ratio V/V(max) varies from 0.8 to 0.4 for a cross-linking ra Composite microcapsules consisting of a thermo-responsive hydrogel poly-N-isopropylacrylamide (PNIPAM) and coated by silica (SiO(2)) nanoparticles have been synthesized by the inverse Pickering emulsion polymerization method. The composite capsules, whose mean diameter is in the 25-86 microm range in the expanded state, were characterized by static light scattering, atomic force microscopy (AFM), scanning electron microscopy (SEM), and laser scanning confocal microscopy (LSCM). It is reported that the hydrogel surface is uniformly covered by a monolayer of silica nanoparticles and that depending on the capsule size and degree of polymer cross-linking, either hollow-core or partially-filled hydrogel-core microcapsules can be created. Equilibrium thermo-responsive behavior of the composite microcapsules is investigated and it is found that after heating the particles above the lower critical solution temperature (LCST) of PNIPAM, the shrinkage ratio V/V(max) varies from 0.8 to 0.4 for a cross-linking ra (en)
Title	Investigation of internal microstructure and thermo-responsive properties of composite PNIPAM/silica microcapsules Investigation of internal microstructure and thermo-responsive properties of composite PNIPAM/silica microcapsules (en)
skos:prefLabel	Investigation of internal microstructure and thermo-responsive properties of composite PNIPAM/silica microcapsules Investigation of internal microstructure and thermo-responsive properties of composite PNIPAM/silica microcapsules (en)
skos:notation	RIV/60461373:22340/10:00023295!RIV11-GA0-22340___
http://linked.open...avai/riv/aktivita	P R S
http://linked.open...avai/riv/aktivity	P(GD104/08/H055), P(KJB401280801), R, S
http://linked.open...iv/cisloPeriodika	2
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Štěpánek, František Hanuš, Jaroslav Čejková, Jitka
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	Vysoká škola chemicko-technologická v Praze / Fakulta chemicko-inženýrská
http://linked.open...dnocenehoVysledku	264824
http://linked.open...ai/riv/idVysledku	RIV/60461373:22340/10:00023295
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Microencapsulation; Hydrogel; Stimuli-responsive polymer; Pickering emulsion; Drying (en)
http://linked.open.../riv/klicoveSlovo	Microencapsulation Pickering emulsion Stimuli-responsive polymer Drying Hydrogel
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[1DC2A71F0619]
http://linked.open...i/riv/nazevZdroje	Journal of Colloid and Interface Science
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 Biomimetic Engineering of Active Porous Structures
http://linked.open...UplatneniVysledku	2010
http://linked.open...v/svazekPeriodika	346
http://linked.open...iv/tvurceVysledku	Štěpánek, František Hanuš, Jaroslav Čejková, Jitka
http://linked.open...ain/vavai/riv/wos	000277482200011
issn	0021-9797
number of pages	9 (xsd:int)
http://localhost/t...ganizacniJednotka	22340

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