Silica particles have a strong hydrophobic trimethylsilyl (TMS) surface in the size of 200 nm. The product is provided powders and allow a direct suspension of the particles in organic solvents.
|Q: Does dispersing them in ethanol (or any other organic solvent) and re-drying them affect it's hydrophobocity?|
|A: Dispersing and re-drying should have no effect on the hydrophobicity since the TMS group are covalently bound to the surface.|
|Q: As for TMS-coated, acrylate-coated and the C18 coated particles, which one is more hydrophobic and which one is the least hydrophobic?|
|A: From the chemical point of view the hydrophobicity is increasing in the following order: acrylate < TMS < C18 which allows a direct suspension of the particles in organic solvents such as ethanol.|