Interaction of poly(ethylene glycol) with fumed silica and alumina/silica/titania

Klonos, P; Pissis, P; Gun'ko, VM; Kyritsis, A; Guzenko, NV; Pakhlov, EM; Zarko, VI; Janusz, W; Skubiszewska-Zieba, J; Leboda, R

dc.contributor.author	Klonos, P	en
dc.contributor.author	Pissis, P	en
dc.contributor.author	Gun'ko, VM	en
dc.contributor.author	Kyritsis, A	en
dc.contributor.author	Guzenko, NV	en
dc.contributor.author	Pakhlov, EM	en
dc.contributor.author	Zarko, VI	en
dc.contributor.author	Janusz, W	en
dc.contributor.author	Skubiszewska-Zieba, J	en
dc.contributor.author	Leboda, R	en
dc.date.accessioned	2014-03-01T01:33:39Z
dc.date.available	2014-03-01T01:33:39Z
dc.date.issued	2010	en
dc.identifier.issn	0927-7757	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20514
dc.subject	Adsorption	en
dc.subject	DRS	en
dc.subject	DSC	en
dc.subject	FTIR	en
dc.subject	Fumed oxides	en
dc.subject	Glass transition	en
dc.subject	PCS	en
dc.subject	Poly(ethylene glycol)	en
dc.subject	Relaxation	en
dc.subject	TSDC	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.other	Acid site	en
dc.subject.other	Adsorption layer	en
dc.subject.other	Alumina/silica/titania	en
dc.subject.other	Aqueous suspensions	en
dc.subject.other	Composite powders	en
dc.subject.other	Dielectric relaxation spectroscopy	en
dc.subject.other	DRS	en
dc.subject.other	DSC	en
dc.subject.other	FT-IR spectrum	en
dc.subject.other	FTIR	en
dc.subject.other	Fumed oxides	en
dc.subject.other	Fumed silicas	en
dc.subject.other	Glass transition temperature	en
dc.subject.other	Local interactions	en
dc.subject.other	Nano-oxides	en
dc.subject.other	Primary particles	en
dc.subject.other	Second effects	en
dc.subject.other	Secondary particles	en
dc.subject.other	Thermally stimulated depolarization currents	en
dc.subject.other	Activation energy	en
dc.subject.other	Adsorption	en
dc.subject.other	Agglomeration	en
dc.subject.other	Differential scanning calorimetry	en
dc.subject.other	Ethylene	en
dc.subject.other	Ethylene glycol	en
dc.subject.other	Glass	en
dc.subject.other	Infrared spectroscopy	en
dc.subject.other	Photon correlation spectroscopy	en
dc.subject.other	Polyethylene glycols	en
dc.subject.other	Polyethylene oxides	en
dc.subject.other	Silica	en
dc.subject.other	Suspensions (fluids)	en
dc.subject.other	Glass transition	en
dc.subject.other	macrogol	en
dc.subject.other	nanocomposite	en
dc.subject.other	polymer	en
dc.subject.other	silicon dioxide	en
dc.subject.other	adsorption kinetics	en
dc.subject.other	article	en
dc.subject.other	chemical reaction kinetics	en
dc.subject.other	controlled study	en
dc.subject.other	depolarization	en
dc.subject.other	dielectric constant	en
dc.subject.other	differential scanning calorimetry	en
dc.subject.other	glass transition temperature	en
dc.subject.other	hydration	en
dc.subject.other	infrared spectroscopy	en
dc.subject.other	macromolecule	en
dc.subject.other	particle size	en
dc.subject.other	photon correlation spectroscopy	en
dc.subject.other	priority journal	en
dc.subject.other	temperature sensitivity	en
dc.subject.other	thermal stimulation	en
dc.subject.other	thermodynamics	en
dc.title	Interaction of poly(ethylene glycol) with fumed silica and alumina/silica/titania	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.colsurfa.2010.03.002	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.colsurfa.2010.03.002	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	The characteristics of composites with PEG (35 kDa) - nanooxides (fumed silica A-300, S-BET = 342 m(2)/g, and alumina/silica/titania (AST) at oxides content of 22, 28, and 50 wt%, respectively, S-BET = 38 m(2)/g) were studied depending on PEG content (C-PEG = 100, 90, 80, 40, and 20 wt%) at different temperatures and various hydration using Fourier transform infrared (FTIR) spectroscopy, photon correlation spectroscopy (PCS), differential scanning calorimetry (DSC), thermally stimulated depolarization current (TSDC), and dielectric relaxation spectroscopy (DRS) methods In the aqueous suspensions the secondary particle (aggregates of primary particles) size distribution corresponds to larger particles for PEG/AST than PEG/A-300 For composite powders (0 3-3 wt% of water) with well distributed macromolecules (according to the FTIR spectra) the relaxation characteristics (temperature of relaxation maxima, activation energy of relaxation, glass transition temperature and activation energy) show that overall interaction is stronger for PEG/A-300 but local interaction in the adsorption layer is stronger for PEG/AST because of much greater S-BET of A-300 (first effect) and stronger Bronsted acid sites in AST (second effect). (C) 2010 Elsevier B V All rights reserved	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Colloids and Surfaces A: Physicochemical and Engineering Aspects	en
dc.identifier.doi	10.1016/j.colsurfa.2010.03.002	en
dc.identifier.isi	ISI:000277931400031	en
dc.identifier.volume	360	en
dc.identifier.issue	1-3	en
dc.identifier.spage	220	en
dc.identifier.epage	231	en