Please use this identifier to cite or link to this item: doi:10.22028/D291-24250
Title: Investigation of new ion-conducting ORMOLYTES : structure and properties
Author(s): Dahmouche, Karim
Atik, Mohamed
Mello, Nilson C.
Bonagamba, Tito J.
Panepucci, Horacio
Aegerter, Michel A.
Judeinstein, Patrick
Language: English
Year of Publication: 1997
OPUS Source: Journal of sol-gel science and technology. - 8. 1997, S. 711-715
SWD key words: Lithiumion
Tetraethylsilicat <Tetraethylorthosilicat>
DDC notations: 620 Engineering and machine engineering
Publikation type: Journal Article
Abstract: Two families of hybrid organic-inorganic composites exhibiting Li+ ionic conduction (ORMOLYTES) have been prepared by the sol-gel process. The first family, prepared from a mixture of 3-isocyanatopropyltriethoxysilane, O,O''Bis (2-aminopropyl)-polyethyleneglycol (or O,O'Bis (2-aminopropyl)-polypropyleneglycol) and lithium salt, presents chemical bonds between the organic and the inorganic phase and an ionic conductivity &sigma; higher than 10-4 S m-1 at room temperature. Their properties have been related to their structure using liquid state NMR measurements of 7Li between -100°C and +100'°C and the DMTA technique. In the second family, prepared by ultrasonic method from a mixture of tetraethoxysilane (TEOS), polyethyleneglycol (PEG) and lithium salt, the organic and inorganic phases are not chemically bonded. Ionic conductivity &sigma; has been studied as a function of the polymer chain length and concentration. Values of &sigma; up to 10-2S m-1 at room temperature have been obtained (with a silica-PEG300 system, PEG/TEOS=40% in weight). Again, structure was investigated by liquid state 7Li NMR measurements.
Link to this record: urn:nbn:de:bsz:291-scidok-24914
Date of registration: 4-Dec-2009
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
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