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  • Articles  (2)
  • Articles: DFG German National Licenses  (2)
  • ORMOLYTES  (2)
  • 1995-1999  (2)
Collection
  • Articles  (2)
Source
  • Articles: DFG German National Licenses  (2)
Publisher
Years
  • 1995-1999  (2)
Year
  • 1
    ISSN: 1573-4846
    Keywords: hybrid materials ; ORMOLYTES ; ionic conductivity ; nuclear magnetic resonance (NMR) ; polymers ; SiO2-PEG, SiO2-PPG
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: 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 σ higher than 10−4 S m−1 at room temperature. Their properties have been related to their structure using liquid state NMR measurements of7Li 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 σ has been studied as a function of the polymer chain length and concentration. Values of σ 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 state7Li NMR measurements.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-4846
    Keywords: hybrid materials ; ORMOLYTES ; ionic conductivity ; nuclear magnetic resonance (NMR) ; polymers ; SiO2-PEG ; SiO2-PPG
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: 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 σ 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 σ has been studied as a function of the polymer chain length and concentration. Values of σ up to 10-2 S 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.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
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