About: Remotely triggered release from composite hydrogel sponges

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	A thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) hydrogel crosslinked with methylene bisacrylamide (MBA), with the ability to undergo a volume change of approximately 50%, was used to fabricate a hydrogel %22sponge%22 with oil microdrops encapsulated within its structure by the polymerization of an O/W emulsion. By adding 1.5 wt.% of iron oxide nanoparticles to the hydrogel structure it is possible to trigger the hydrogel volume change remotely by exposing the composite to an alternating magnetic field in the radiofrequency range, which heats up the nanoparticles. The increase of the hydrogel temperature leads to its shrinking and subsequently the encapsulated oil droplets are squeezed out. It was shown that the oil is released gradually during cyclic volume change (repeated heating and cooling) and the amount of oil content released during the first 8-15 shrinking cycles was in the range 1-3% v/v per cycle. The total amount of the released oil phase was in the range 18-24% v/v and it was found to be affected by the size of the encapsulated microdroplets, with the larger ones being squeezed out preferentially. A thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) hydrogel crosslinked with methylene bisacrylamide (MBA), with the ability to undergo a volume change of approximately 50%, was used to fabricate a hydrogel %22sponge%22 with oil microdrops encapsulated within its structure by the polymerization of an O/W emulsion. By adding 1.5 wt.% of iron oxide nanoparticles to the hydrogel structure it is possible to trigger the hydrogel volume change remotely by exposing the composite to an alternating magnetic field in the radiofrequency range, which heats up the nanoparticles. The increase of the hydrogel temperature leads to its shrinking and subsequently the encapsulated oil droplets are squeezed out. It was shown that the oil is released gradually during cyclic volume change (repeated heating and cooling) and the amount of oil content released during the first 8-15 shrinking cycles was in the range 1-3% v/v per cycle. The total amount of the released oil phase was in the range 18-24% v/v and it was found to be affected by the size of the encapsulated microdroplets, with the larger ones being squeezed out preferentially. (en)
Title	Remotely triggered release from composite hydrogel sponges Remotely triggered release from composite hydrogel sponges (en)
skos:prefLabel	Remotely triggered release from composite hydrogel sponges Remotely triggered release from composite hydrogel sponges (en)
skos:notation	RIV/60461373:22340/12:43893585!RIV13-MSM-22340___
http://linked.open...avai/riv/aktivita	S
http://linked.open...avai/riv/aktivity	S
http://linked.open...iv/cisloPeriodika	6
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Štěpánek, František Tokárová, Viola Zadražil, Aleš
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	164966
http://linked.open...ai/riv/idVysledku	RIV/60461373:22340/12:43893585
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	GEL; EMULSION; POLYMERS; TRANSPORT; MICROCONTAINERS; POLY(N-ISOPROPYLACRYLAMIDE); WATER; PHASE-TRANSITION; MAGNETIC NANOPARTICLES; DRUG-DELIVERY SYSTEMS (en)
http://linked.open.../riv/klicoveSlovo	WATER TRANSPORT POLYMERS DRUG-DELIVERY SYSTEMS EMULSION GEL MAGNETIC NANOPARTICLES MICROCONTAINERS PHASE-TRANSITION POLY(N-ISOPROPYLACRYLAMIDE)
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[1528E51B8B2D]
http://linked.open...i/riv/nazevZdroje	SOFT MATTER
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...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	8
http://linked.open...iv/tvurceVysledku	Tokárová, Viola Štěpánek, František Zadražil, Aleš
http://linked.open...ain/vavai/riv/wos	000299291900014
issn	1744-683X
number of pages	6 (xsd:int)
http://bibframe.org/vocab/doi	10.1039/c1sm06707a
http://localhost/t...ganizacniJednotka	22340

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