Abstract
The structure variation of cellulose acetate (CA) reverse osmosis (RO) membranes due to thermal annealing was investigated by using gas adsorption. When the CA membranes were dehydrated by freeze-drying, the morphology of the unannealed membrane was similar to that of the annealed membrane. On the contrary, with air-drying which induced structure collapse of the CA membranes, gas adsorption behavior of the unannealed membrane showed a significant difference from that of the annealed membrane. The CA RO membrane in an unannealed state totally collapsed during air-drying, but the membrane that was annealed for 10 min at 90°C showed significantly reduced collapsing compared to the unannealed one. However, even though the CA membranes were annealed, use of methanol as the wetting agent caused complete collapsing during air-drying.
| Original language | English |
|---|---|
| Pages (from-to) | 195-200 |
| Number of pages | 6 |
| Journal | Desalination |
| Volume | 101 |
| Issue number | 2 |
| DOIs | |
| State | Published - Apr 1995 |
Bibliographical note
Funding Information:This research pioject was supported by a NSF/EPSCOR grant (EIIR-9108764) through the University of Kentucky Center of Membrane Sciences.
Keywords
- Reverse osmosis
- Thermal annealing
ASJC Scopus subject areas
- General Chemistry
- General Chemical Engineering
- General Materials Science
- Water Science and Technology
- Mechanical Engineering