Investigation of New Ion Conducting Ormolytes Silica-Polypropyleneglycol

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorDahmouche, K.
dc.creatorDe Souza, P. H.
dc.creatorBonagamba, T. J.
dc.creatorPaneppucci, H.
dc.creatorJudeinstein, P.
dc.creatorPulcinelli, Sandra Helena
dc.creatorSantilli, Celso Valentim
dc.date2014-05-27T11:19:48Z
dc.date2016-10-25T18:15:58Z
dc.date2014-05-27T11:19:48Z
dc.date2016-10-25T18:15:58Z
dc.date1999-12-01
dc.date.accessioned2017-04-06T00:55:12Z
dc.date.available2017-04-06T00:55:12Z
dc.identifierJournal of Sol-Gel Science and Technology, v. 13, n. 1-3, p. 909-913, 1999.
dc.identifier0928-0707
dc.identifierhttp://hdl.handle.net/11449/65922
dc.identifierhttp://acervodigital.unesp.br/handle/11449/65922
dc.identifier10.1023/A:1008627424438
dc.identifierWOS:000078468200161
dc.identifier2-s2.0-0032305921
dc.identifierhttp://dx.doi.org/10.1023/A:1008627424438
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/887576
dc.descriptionTwo groups of hybrid organic-inorganic composites exhibiting ionic conduction properties, so called ORMOLYTES (organically modified electrolytes), have been prepared by the sol-gel process. The first group has been prepared from mixture of a lithium salt and 3-isocyanatopropyltriethoxysilane(IsoTrEOS),O,O′-bis(2-aminopropyl) polypropyleneglycol. These materials produce chemical bonds between the organic (polymer) and the inorganic (silica) phases. The second group has been prepared by an ultrasonic method from a mixture of tetraethoxysilane (TEOS), polypropyleneglycol and a lithium salt. The organic and inorganic phases are not chemically bonded in these samples. The Li+ ionic conductivity, σ, of all these materials has been studied by AC impedance spectroscopy up to 100°C. Values of σ up to 10-6 Ω-1·cm-1 have been found at room temperature. A systematic study of the effects of lithium concentration, polymer chain length and the polymer to silica weight ratio on σ shows that there is a strong dependence of σ on the preparation conditions. The dynamic properties of the Li+ ion and the polymer chains as a function of temperature between -100 and 120°C were studied using 7Li solid-state NMR measurements. The ionic conductivity of both families are compared and particular attention is paid to the nature of the bonds between the organic and inorganic components.
dc.languageeng
dc.relationJournal of Sol-Gel Science and Technology
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectHybrid material
dc.subjectIonic conductor
dc.subjectSilica-polypropyleneglycol
dc.subjectSolid electrolyte
dc.subjectChemical bonds
dc.subjectIonic conduction in solids
dc.subjectLithium
dc.subjectNuclear magnetic resonance
dc.subjectPolyethers
dc.subjectSilica
dc.subjectSol-gels
dc.subjectSolid electrolytes
dc.subjectSpectroscopic analysis
dc.subjectConcentration (process)
dc.subjectInorganic compounds
dc.subjectIonic conduction
dc.subjectOrganic compounds
dc.subjectPolymers
dc.subjectThermal effects
dc.subjectOrganically modified electrolytes
dc.subjectPolypropylene glycols
dc.subjectHybrid materials
dc.subjectIonic conductors
dc.subjectLithium salts
dc.subjectPolyelectrolytes
dc.subjectIons
dc.titleInvestigation of New Ion Conducting Ormolytes Silica-Polypropyleneglycol
dc.typeOtro


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