Conference Proceedings
Surface coating of MCM-48 via a gas phase reaction with hexamethyldisilazane (HMDS)
A Daehler, ML Gee, F Separovic, GW Stevens, AJ O'Connor
Studies in Surface Science and Catalysis | ELSEVIER SCIENCE BV | Published : 2003
Abstract
Hydrophobic coatings on silica M41S materials may have the dual benefits of improving their stability in aqueous environments and their adsorption selectivity for solutes such as proteins and vitamins. In this work, the surface of MCM-48 was successfully coated by a gas phase reaction with hexamethyldisilazane (HMDS). Characterisation by gas adsorption showed that the method is highly reproducible. Solid-state NMR results demonstrated that the coating was chemically attached to the surface. The material was much more stable than untreated MCM-48 in aqueous buffer solution for up to 40 days. © 2003 Elsevier Science B.V. All rights reserved.