| Title | New approaches to surface-alkoxylated silica with increased hydrolytic stability |
| Publication Type | Journal Article |
| Year of Publication | 2001 |
| Authors | Ossenkamp, G.C., Kemmitt T., and Johnston J.H. |
| Journal | Chemistry of Materials |
| Volume | 13 |
| Issue | 11 |
| Pagination | 3975 - 3980 |
| Date Published | 2001 |
| ISSN | 08974756 (ISSN) |
| Keywords | acid, alcohol derivative, alkyl group, article, base, catalysis, chemical modification, chemical reaction, chemical structure, high temperature, Hydrolysis, molecular stability, nuclear magnetic resonance spectroscopy, polymer, precipitation, silicon dioxide, surface property, water |
| Abstract | Surface-alkoxylated silica can be prepared by reacting precipitated silica with high-boiling and polymeric alcohols. The structure of the products was investigated through 13C and 29Si MAS NMR experiments. The influence of the alkoxy group structure and density on the hydrolytic stability of the alkoxylated silicas was determined through contact with boiling water. Use of polymeric or branched alcohols increased the hydrolytic stability of surface-alkoxylated silicas compared to straight-chain alcohols. The rate of surface substitution is increased by both acid and base catalysis. |
| URL | http://www.scopus.com/inward/record.url?eid=2-s2.0-0035185046&partnerID=40&md5=9fa3d934336929a9e2e514a7eda0a7d1 |
| DOI | 10.1021/cm000883t |
