Development of Asymmetric Cellulose Triacetate Membranes for Seawater Desalination.

摘要

This program represented a continuation of previous work which showed that cellulose triacetate (CTA),with acetyl content in the range of 43% to 44%,should have the required long-term salt rejection capability needed for single stage sea water demineralization. Initially,problems with initial flux and rate of flux decline under reasonable pressure conditions were encountered with the use of CTA. Improvements in membrane fabrication techniques resulted in increased reproducibility which was accompanied by significant increases in membrane compaction resistance and in product flux. The results demonstrate both the overall improvement in membrane performance and the physical integrity of the spiral elements fabricated for the high pressure application to sea water desalination.