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TitleVibrational analysis of d-PCL(530)/siloxane based hybrids doped with two lithium salts
Author(s)Ferreira, C. B.
Fernandes, M.
Rodrigues, L. C.
Silva, Maria Manuela
Smith, Michael John
Bermudez, V. de Zea
Li+ conductors
Issue dateMay-2013
PublisherSpringer Verlag
Abstract(s)The present study has been focused on environmentally friendly sol-gel derived electrolytes based on a di-urethane cross-linked d-PCL(530)/siloxane network (where d represents di, PCL identifies the poly(ε–caprolactone) biopolymer and 530 is the average molecular weight in g.mol-1) doped with a wide range of concentration of lithium perchlorate (LiClO4) and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI). Fourier Transform Infrared and Raman (FT-IR and FT-Raman, respectively) spectroscopies have been applied to evaluate the extent of ionic association. Characteristic bands of the PCL(530) segments, of the urethane cross-links and of the anions have been examined to gain insight into the cation/biopolymer, cation/anion and cation/cross-link interactions. In both electrolyte systems “free” ions and contact ions have been identified. The addition of salt modifies the hydrogen-bonded array of the host matrix, causing the destruction/formation of the urethane/urethane aggregates.
DescriptionPublished online: 22 May 2013
Publisher versionThe original publication is available at
AccessOpen access
Appears in Collections:CDQuim - Artigos (Papers)

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