Abstract
Summary: Polydimethylsiloxane with trimethylammonium end groups and polydimethylsiloxane with diethylmethylammonium groups in the main chain was prepared by two routes. A novel carbonate coupler – (2‐oxo‐1,3‐dioxolan‐4‐yl) methyl phenyl carbonate – and the amine compounds α,ω‐(3‐aminopropyl) polydimethylsiloxane, 3‐(dimethylamino)‐1‐propylamine, and bis(2‐amino ethyl)amine served as the starting materials. The polymers obtained are hydrophobic and contain ammonium groups suitable for interaction with negatively charged surfaces. Thus these materials can be used for special surface modifications. Thin films were prepared by spin‐coating. Their morphology and properties were determined by means of optical microscopy, SFM, and contact angle measurements. The particle size distribution in aqueous solution of the vesicles formed was determined by means of a laser scattering technique; the particle sizes determined correspond to those obtained by optical microscopy. Finally, the antibacterial effects of these polymers with hydrophobic and cationic groups were tested.
α,ω‐Diammonium octadimethylsiloxane molecule (6), an SFM phase image for a spin‐coated film of 6 on a silicon wafer, and a scheme of the way the molecules stack on the surface.
magnified image__α__,ω‐Diammonium octadimethylsiloxane molecule (6), an SFM phase image for a spin‐coated film of 6 on a silicon wafer, and a scheme of the way the molecules stack on the surface.