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Inorganic “Silicone Oil” Microgels by Michael I. Goller; Timothy M. Obey; Declan O.H. Teare; Brian Vincent; Matthias R. Wegener is a Materials Science article available to read on EtoBox.

What is Inorganic “Silicone Oil” Microgels about?

We report investigations into the stability, morphology, internal microstructure and swelling behaviour of polydimethylsiloxane oil-in-water emulsions (1 vol.% monomer; 1 vol.% NH3 solution; 25°C) prepared using mixtures of difunctional (dimethyldiethoxysilane (DMDES)) and trifunctional silane monomers. Both methyltriethoxysilane (MTES) and 3-aminepropyltriethoxysilane (APTES) are potential cross-linkers owing to their trifunctionality. The addition of MTES leads to major changes in various properties of the PDMS droplets. Transmission electron microscopy was used to observe the transition between liquid droplets ([MTES] 50 vol.%). The particles showed significantly reduced swelling in n-heptane in comparison with the liquid droplets. This restriction on swelling indicates the formation of internally cross-linked particles. 298i nuclear magnetic resonance (NMR) and mass spectroscopy demonstrated increased incorporation of trifunctional material in PDMS polymers as the MTES concentration was raised. The chemical structure of the trifunctional monomer was shown to be important, as 298i NMR suggests that APTES does not polymerize with DMDES but may reside in the aqueous continuous ph

Who reads Inorganic “Silicone Oil” Microgels?

Author

Michael I. Goller; Timothy M. Obey; Declan O.H. Teare; Brian Vincent; Matthias R. Wegener

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0927-7757)

Published

1997

Language

EN

Field

Materials Science (Physical Sciences)