Controlling Foam Morphology of Poly(methyl methacrylate) via Surface Chemistry and Concentration of Silica Nanoparticles and Supercritical Carbon Dioxide Process Parameters
Figure 2
(a) The structure of F-TEOS. (b) Possible reaction mechanisms of the surface modifier, F-TEOS, with hydroxyl groups on silica. Three possible attachments of F-TEOS to the silica surface are possible. Mechanisms I and II leave ethoxysilane groups on F-TEOS that might react with neighboring tethered or free F-TEOS groups resulting in multilayered coverage on the silica nanoparticle.
