Di-ureasil ormolytes doped with Mg2+ ions : part 1: morphological, thermal and electrochemical properties
Poly(oxyethylene)(POE/siloxane-based materials incorporating magnesium triflate were prepared by the sol-gel process. The host Class II hybrid matrix (di-ureasil) employed was composed of a siliceous framework to which short POE chains were covalently bonded through urea linkages. Ormolytes with sal...
Main Author: | |
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Other Authors: | , , , , , , |
Format: | article |
Language: | eng |
Published: |
2005
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Subjects: | |
Online Access: | http://hdl.handle.net/1822/5163 |
Country: | Portugal |
Oai: | oai:repositorium.sdum.uminho.pt:1822/5163 |
Summary: | Poly(oxyethylene)(POE/siloxane-based materials incorporating magnesium triflate were prepared by the sol-gel process. The host Class II hybrid matrix (di-ureasil) employed was composed of a siliceous framework to which short POE chains were covalently bonded through urea linkages. Ormolytes with salt composition ranging from 500 to 1 were characterised. The nanohybrid with n = 20, thermally stable up to 360ºC, exhibited the highest ionic conductivity. The electrochemical stability of this material was found to span -3 to +2 volts. |
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