A carregar...
Publicação
Polyimide and polyetherimide organic solvent nanofiltration membranes
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 8.29 MB | Adobe PDF |
Autores
Orientador(es)
Resumo(s)
Integrally asymmetric skinned Lenzing P84 and Matrimid 5218 polymide membranes and Ultem
1000 polyetherimide membranes were prepared. Crosslinking of membranes using aliphatic
diamines resulted in marked improvement in chemical stability. This however resulted in a
decline in flux with only Lenzing P84 demonstrating good flux in DMF. Further variation of
membrane dope parameters and operating conditions allowed for good control of the MWCO of
membranes made from Lenzing P84. SEM pictures of Lenzing P84 membranes revealed a
significant difference in membranes morphology. The presence of macrovoids increased when
using more DMF in the dope solution. These studies demonstrate the possibility of developing
OSN membranes using different polyimides and opens up future possibilities for controlling the
MWCO of these membranes. Preliminary modelling demonstrates that good control of the
MWCO could extend the application of OSN membranes to allow the fraction of molecules in
the NF range.
Descrição
Palavras-chave
Ultrafiltração Solventes orgânicos Membranas (Tecnologia) Engenharia química Bioquímica