Rheology assessment of cellulose acetate spinning solution and its influence on reverse osmosis hollow fiber membrane performance
Cellulose acetate spinning solution used to produce reverse osmosis (RO) hollow fiber membranes was rheologically assessed using a rotational rheometer and an optical shear cell. Rheology measurements which involved flow curves were carried out so as to obtain the values of power law coefficients, n...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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2003
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| Online Access: | http://eprints.utm.my/765/ http://eprints.utm.my/765/1/ |
| _version_ | 1848889990603341824 |
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| author | Idris, Ani Ismail, A. F. Gordeyev, S. A. Shiltom, S. J. |
| author_facet | Idris, Ani Ismail, A. F. Gordeyev, S. A. Shiltom, S. J. |
| author_sort | Idris, Ani |
| building | UTeM Institutional Repository |
| collection | Online Access |
| description | Cellulose acetate spinning solution used to produce reverse osmosis (RO) hollow fiber membranes was rheologically assessed using a rotational rheometer and an optical shear cell. Rheology measurements which involved flow curves were carried out so as to obtain the values of power law coefficients, n and k. The power law behaviour, normal force and flow profiles generated provided clues regarding phase inversion and molecular orientation. These rheological results are then correlated to the performance of cellulose acetate RO hollow fibers spun at different extrusion shear rates. The results suggest that extrusion shear is linked indirectly to phase inversion through induced molecular orientation, which in turn, affects the subsequent dry/wet precipitation stages in spinning. As the extrusion shear rate increases, the level of shear experienced at the walls of the spinneret also increases, thus leading to greater molecular orientation, resulting in membranes with higher rejection and flux rates. |
| first_indexed | 2025-11-15T20:34:57Z |
| format | Article |
| id | utm-765 |
| institution | Universiti Teknologi Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T20:34:57Z |
| publishDate | 2003 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | utm-7652017-10-19T05:26:44Z http://eprints.utm.my/765/ Rheology assessment of cellulose acetate spinning solution and its influence on reverse osmosis hollow fiber membrane performance Idris, Ani Ismail, A. F. Gordeyev, S. A. Shiltom, S. J. TP Chemical technology Cellulose acetate spinning solution used to produce reverse osmosis (RO) hollow fiber membranes was rheologically assessed using a rotational rheometer and an optical shear cell. Rheology measurements which involved flow curves were carried out so as to obtain the values of power law coefficients, n and k. The power law behaviour, normal force and flow profiles generated provided clues regarding phase inversion and molecular orientation. These rheological results are then correlated to the performance of cellulose acetate RO hollow fibers spun at different extrusion shear rates. The results suggest that extrusion shear is linked indirectly to phase inversion through induced molecular orientation, which in turn, affects the subsequent dry/wet precipitation stages in spinning. As the extrusion shear rate increases, the level of shear experienced at the walls of the spinneret also increases, thus leading to greater molecular orientation, resulting in membranes with higher rejection and flux rates. 2003 Article PeerReviewed application/pdf en http://eprints.utm.my/765/1/ Idris, Ani and Ismail, A. F. and Gordeyev, S. A. and Shiltom, S. J. (2003) Rheology assessment of cellulose acetate spinning solution and its influence on reverse osmosis hollow fiber membrane performance. Polymer Testing, 22 . pp. 319-325. http://dx.doi.org/10.1016/S0142-9418(02)00107-1 10.1016/S0142-9418(02)00107-1 |
| spellingShingle | TP Chemical technology Idris, Ani Ismail, A. F. Gordeyev, S. A. Shiltom, S. J. Rheology assessment of cellulose acetate spinning solution and its influence on reverse osmosis hollow fiber membrane performance |
| title | Rheology assessment of cellulose acetate spinning solution
and its influence on reverse osmosis hollow fiber membrane
performance |
| title_full | Rheology assessment of cellulose acetate spinning solution
and its influence on reverse osmosis hollow fiber membrane
performance |
| title_fullStr | Rheology assessment of cellulose acetate spinning solution
and its influence on reverse osmosis hollow fiber membrane
performance |
| title_full_unstemmed | Rheology assessment of cellulose acetate spinning solution
and its influence on reverse osmosis hollow fiber membrane
performance |
| title_short | Rheology assessment of cellulose acetate spinning solution
and its influence on reverse osmosis hollow fiber membrane
performance |
| title_sort | rheology assessment of cellulose acetate spinning solution
and its influence on reverse osmosis hollow fiber membrane
performance |
| topic | TP Chemical technology |
| url | http://eprints.utm.my/765/ http://eprints.utm.my/765/ http://eprints.utm.my/765/ http://eprints.utm.my/765/1/ |