Characterization of β‐cyclodextrin modified SiO2 |
| |
| Authors: | Ronnie Nielsen Peter Kingshott Tamer Uyar Jale Hacaloglu Kim L. Larsen |
| |
| Affiliation: | 1. Section of Chemistry, Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, 9000 Aalborg, Denmark;2. Interdisciplinary Nanoscience Center (iNANO), Faculty of Science, Aarhus University, 8000 Aarhus, Denmark;3. Chemistry Department, Arts & Science Faculty, Middle East Technical University, 06531 Ankara, Turkey |
| |
| Abstract: | Silica particles containing a layer of β‐cyclodextrins were synthesized using a modified method of Armstrong (1985). The modified silica particles were extensively characterized to both the presence and amount of β‐cyclodextrin introduced onto the surface. Raman confirmed that β‐cyclodextrin was introduced onto the particle. The combination of thermogravmetric analysis (TGA) and direct pyrolysis mass spectroscopy were used to determine the amount and the chemical composition of organic material present on the silica, respectively. The two methods confirmed that β‐cyclodextrin was successfully introduced in amounts comparable to earlier literature values. The values obtained by TGA were compared to amounts found by elemental analysis and XPS. The elemental analysis and TGA found the same amount of β‐cyclodextrin, while the XPS values were in the region of 1.5 times higher. This suggests a heterogeneous distribution of the β‐cyclodextrin on the silica particles. Copyright © 2010 John Wiley & Sons, Ltd. |
| |
| Keywords: | cyclodextrin XRD RAMAN TGA XPS elemental analysis DP‐MS |
|
|
