Hydrophilic/Hydrophobic Properties of Silica Surfaces Modified with Metal Oxides and Polydimethylsiloxane
Microcalorimetry and measurements of the contact angle of water were performed to investigate the hydrophilic/hydrophobic properties of silica surfaces modified with metal oxides and polydimethylsiloxane (PDMS) at 20–500°C. Fumed silicas whose surfaces contained grafted oxygen compounds of metals we...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2004-07-01
|
| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263617042879546 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Microcalorimetry and measurements of the contact angle of water were performed to investigate the hydrophilic/hydrophobic properties of silica surfaces modified with metal oxides and polydimethylsiloxane (PDMS) at 20–500°C. Fumed silicas whose surfaces contained grafted oxygen compounds of metals were used as adsorbents, with VOCl 3 , CrO 2 Cl 2 , TiCl 4 , SnCl 4 , AlCl 3 and Zn(acac) 2 vapours being applied as modifiers. It was found that the hydrophobic coating of silicas modified with metal oxides and PDMS (8–40 wt%) was stable over the temperature range 100–350°C. With a titania coating, the hydrophobic properties were retained at temperatures up to 500°C for an adsorbed polymer content of 20–40 wt%. |
|---|---|
| ISSN: | 0263-6174 2048-4038 |