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Statements

Subject Item
n2:RIV%2F60461373%3A22340%2F10%3A00023288%21RIV11-GA0-22340___
rdf:type
n16:Vysledek skos:Concept
dcterms:description
In the study described in this paper we have prepared microbeads composed of thermo-responsive polymer PNIPAM and iron oxide (Fe3O4) nanoparticles. These composite microbeads keep the temperature-sensitive swelling/deswelling properties of pure PNIPAM. Moreover, magnetic nanoparticles in the PNIPAM/Fe3O4 microbeads enable self-heating in the presence of alternating magnetic field (AMF) [8]. When Fe3O4 nanoparticles are exposed to AMF, heat can be generated by Néel relaxation, Brownian relaxation and hysteresis loses, hence Fe3O4 nanoparticles can be used as heating agents directly integrated into the PNIPAM microcapsules. The generated heat causes the polymer to de-swell, thereby releasing its content. Depending on the application, the released payload can be low- or high-molecular weight substance, nanoparticles or other small-scale objects. Combination of thermo-responsive PNIPAM properties and magnetic Fe3O4 properties has an excellent potential e.g. for remotely triggered release where commonly us In the study described in this paper we have prepared microbeads composed of thermo-responsive polymer PNIPAM and iron oxide (Fe3O4) nanoparticles. These composite microbeads keep the temperature-sensitive swelling/deswelling properties of pure PNIPAM. Moreover, magnetic nanoparticles in the PNIPAM/Fe3O4 microbeads enable self-heating in the presence of alternating magnetic field (AMF) [8]. When Fe3O4 nanoparticles are exposed to AMF, heat can be generated by Néel relaxation, Brownian relaxation and hysteresis loses, hence Fe3O4 nanoparticles can be used as heating agents directly integrated into the PNIPAM microcapsules. The generated heat causes the polymer to de-swell, thereby releasing its content. Depending on the application, the released payload can be low- or high-molecular weight substance, nanoparticles or other small-scale objects. Combination of thermo-responsive PNIPAM properties and magnetic Fe3O4 properties has an excellent potential e.g. for remotely triggered release where commonly us
dcterms:title
Synthesis and characterization of temperature-responsive polymer/nano-particle composite microcapsules Synthesis and characterization of temperature-responsive polymer/nano-particle composite microcapsules
skos:prefLabel
Synthesis and characterization of temperature-responsive polymer/nano-particle composite microcapsules Synthesis and characterization of temperature-responsive polymer/nano-particle composite microcapsules
skos:notation
RIV/60461373:22340/10:00023288!RIV11-GA0-22340___
n3:aktivita
n20:R n20:S n20:P
n3:aktivity
P(GD104/08/H055), R, S
n3:dodaniDat
n15:2011
n3:domaciTvurceVysledku
n9:3825361 n9:4022378
n3:druhVysledku
n21:D
n3:duvernostUdaju
n14:S
n3:entitaPredkladatele
n8:predkladatel
n3:idSjednocenehoVysledku
291468
n3:idVysledku
RIV/60461373:22340/10:00023288
n3:jazykVysledku
n4:eng
n3:klicovaSlova
chemical robot; thermo-responsive polymer; PNIPAM; Fe3O4; nanoparticles; composite magnetic microcapsules
n3:klicoveSlovo
n10:chemical%20robot n10:thermo-responsive%20polymer n10:nanoparticles n10:PNIPAM n10:Fe3O4 n10:composite%20magnetic%20microcapsules
n3:kontrolniKodProRIV
[D6B1B669BD02]
n3:mistoKonaniAkce
Litomyšl
n3:mistoVydani
Praha
n3:nazevZdroje
Reakční a transportní jevy IV
n3:obor
n17:CI
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
2
n3:projekt
n19:GD104%2F08%2FH055
n3:rokUplatneniVysledku
n15:2010
n3:tvurceVysledku
Čejková, Jitka Štěpánek, František
n3:typAkce
n5:CST
n3:zahajeniAkce
2010-01-01+01:00
s:numberOfPages
7
n12:hasPublisher
Vysoká škola chemicko-technologická v Praze
n13:isbn
978-80-7080-761-3
n6:organizacniJednotka
22340