Relaxation phenomena in poly(vinyl alcohol)/fumed silica affected by interfacial water

Gun'ko, VM; Pissis, P; Spanoudaki, A; Zarko, VI; Nychiporuk, YM; Andriyko, LS; Goncharuk, EV; Leboda, R; Skubiszewska-Zieba, J; Osovskii, VD; Ptushinskii, YG

dc.contributor.author	Gun'ko, VM	en
dc.contributor.author	Pissis, P	en
dc.contributor.author	Spanoudaki, A	en
dc.contributor.author	Zarko, VI	en
dc.contributor.author	Nychiporuk, YM	en
dc.contributor.author	Andriyko, LS	en
dc.contributor.author	Goncharuk, EV	en
dc.contributor.author	Leboda, R	en
dc.contributor.author	Skubiszewska-Zieba, J	en
dc.contributor.author	Osovskii, VD	en
dc.contributor.author	Ptushinskii, YG	en
dc.date.accessioned	2014-03-01T01:27:02Z
dc.date.available	2014-03-01T01:27:02Z
dc.date.issued	2007	en
dc.identifier.issn	0021-9797	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18320
dc.subject	Broadband dielectric relaxation spectroscopy	en
dc.subject	Infrared spectra	en
dc.subject	PVA adsorption	en
dc.subject	PVA/fumed silica	en
dc.subject	Textural characteristics	en
dc.subject	Thermally stimulated depolarization current	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.other	Adsorption	en
dc.subject.other	Dielectric relaxation	en
dc.subject.other	Hydrogen bonds	en
dc.subject.other	Infrared spectroscopy	en
dc.subject.other	Mass spectrometry	en
dc.subject.other	Silica	en
dc.subject.other	Broadband dielectric relaxation spectroscopy	en
dc.subject.other	PVA adsorption	en
dc.subject.other	PVA/fumed silica	en
dc.subject.other	Textural characteristics	en
dc.subject.other	Thermally stimulated depolarization currents	en
dc.subject.other	Polyvinyl alcohols	en
dc.subject.other	macrogol	en
dc.subject.other	nanoparticle	en
dc.subject.other	polyvinyl alcohol	en
dc.subject.other	silicon dioxide	en
dc.subject.other	water	en
dc.subject.other	adsorption	en
dc.subject.other	article	en
dc.subject.other	chemical interaction	en
dc.subject.other	depolarization	en
dc.subject.other	desorption	en
dc.subject.other	hydrogen bond	en
dc.subject.other	infrared radiation	en
dc.subject.other	infrared spectroscopy	en
dc.subject.other	low temperature	en
dc.subject.other	mass spectrometry	en
dc.subject.other	priority journal	en
dc.subject.other	spectroscopy	en
dc.subject.other	temperature	en
dc.subject.other	thermal analysis	en
dc.subject.other	thermal stimulation	en
dc.subject.other	Adsorption	en
dc.subject.other	Hydrogen Bonding	en
dc.subject.other	Mass Spectrometry	en
dc.subject.other	Polyvinyl Alcohol	en
dc.subject.other	Silicon Dioxide	en
dc.subject.other	Spectrophotometry, Infrared	en
dc.subject.other	Spectrum Analysis	en
dc.subject.other	Surface Properties	en
dc.subject.other	Temperature	en
dc.subject.other	Water	en
dc.title	Relaxation phenomena in poly(vinyl alcohol)/fumed silica affected by interfacial water	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.jcis.2007.03.065	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.jcis.2007.03.065	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	interaction of poly(vinyl alcohol) (PVA) with fumed silica was investigated in the gas phase and aqueous media using adsorption, broadband dielectric relaxation spectroscopy (DRS), thermally stimulated depolarization current (TSDC), infrared spectroscopy, thermal analysis, and onepass temperature-programmed desorption (OPTPD) mass-spectrornetry (MS) methods. PVA monolayer formation leads to certain textural changes in the system (after suspension and drying) because of strong hydrogen bonding of the polymer molecules to silica nanoparticles preventing strong interaction between silica particles themselves. This strong interaction promotes associative desorption of water molecules at lower temperatures than in the case of silica alone. Interaction of PVA with silica and residual water leads to depression of glass transition temperature (Tg). There are three types of dipolar relaxations at temperatures lower and higher than the T-g value. A small amount of adsorbed water leads to significant conductivity with elevating temperature. (c) 2007 Elsevier Inc. All rights reserved.	en
heal.publisher	ACADEMIC PRESS INC ELSEVIER SCIENCE	en
heal.journalName	Journal of Colloid and Interface Science	en
dc.identifier.doi	10.1016/j.jcis.2007.03.065	en
dc.identifier.isi	ISI:000247838300004	en
dc.identifier.volume	312	en
dc.identifier.issue	2	en
dc.identifier.spage	201	en
dc.identifier.epage	213	en