Dilute iota- and kappa-Carrageenan solutions with high viscosities in high salinity brines
We evaluated the rheological characteristics of ι- and κ-Carrageenan in aqueous solutions. Viscosities strongly increased with increasing polymer concentration or salinity. Monovalent Na+ cations were more effective in increasing viscosity than divalent Ca2+ cations. A more complex brine containing...
| Main Authors: | , , , , |
|---|---|
| Format: | Journal Article |
| Published: |
Elsevier BV
2011
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/9615 |
| _version_ | 1848746000576937984 |
|---|---|
| author | Iglauer, Stefan Wu, Y. Shuler, P. Tang, Y. Goddard, W. |
| author_facet | Iglauer, Stefan Wu, Y. Shuler, P. Tang, Y. Goddard, W. |
| author_sort | Iglauer, Stefan |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We evaluated the rheological characteristics of ι- and κ-Carrageenan in aqueous solutions. Viscosities strongly increased with increasing polymer concentration or salinity. Monovalent Na+ cations were more effective in increasing viscosity than divalent Ca2+ cations. A more complex brine containing Na+, Mg2+ and Ca2+ cations also showed high viscosities at a high salinity. We observed shear thinning behavior for these polysaccharide solutions. We explain these rheological phenomena with molecular processes, specifically the conformation change of the ι-Carrageenan from random coil to double helix. In the context of enhanced oil recovery, ι-Carrageenan solutions can reach much higher viscosities at high salinities than standard polyacrylamide solutions. Moreover, Carrageenans are renewable, nontoxic, green substances. |
| first_indexed | 2025-11-14T06:26:18Z |
| format | Journal Article |
| id | curtin-20.500.11937-9615 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:26:18Z |
| publishDate | 2011 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-96152017-09-13T16:07:07Z Dilute iota- and kappa-Carrageenan solutions with high viscosities in high salinity brines Iglauer, Stefan Wu, Y. Shuler, P. Tang, Y. Goddard, W. Fracturing fluid Rheology Mobility control Near-wellbore fluid Gelling mechanism Shear thinning ι- and κ-Carrageenan High salinity Polymer solution We evaluated the rheological characteristics of ι- and κ-Carrageenan in aqueous solutions. Viscosities strongly increased with increasing polymer concentration or salinity. Monovalent Na+ cations were more effective in increasing viscosity than divalent Ca2+ cations. A more complex brine containing Na+, Mg2+ and Ca2+ cations also showed high viscosities at a high salinity. We observed shear thinning behavior for these polysaccharide solutions. We explain these rheological phenomena with molecular processes, specifically the conformation change of the ι-Carrageenan from random coil to double helix. In the context of enhanced oil recovery, ι-Carrageenan solutions can reach much higher viscosities at high salinities than standard polyacrylamide solutions. Moreover, Carrageenans are renewable, nontoxic, green substances. 2011 Journal Article http://hdl.handle.net/20.500.11937/9615 10.1016/j.petrol.2010.11.025 Elsevier BV restricted |
| spellingShingle | Fracturing fluid Rheology Mobility control Near-wellbore fluid Gelling mechanism Shear thinning ι- and κ-Carrageenan High salinity Polymer solution Iglauer, Stefan Wu, Y. Shuler, P. Tang, Y. Goddard, W. Dilute iota- and kappa-Carrageenan solutions with high viscosities in high salinity brines |
| title | Dilute iota- and kappa-Carrageenan solutions with high viscosities in high salinity brines |
| title_full | Dilute iota- and kappa-Carrageenan solutions with high viscosities in high salinity brines |
| title_fullStr | Dilute iota- and kappa-Carrageenan solutions with high viscosities in high salinity brines |
| title_full_unstemmed | Dilute iota- and kappa-Carrageenan solutions with high viscosities in high salinity brines |
| title_short | Dilute iota- and kappa-Carrageenan solutions with high viscosities in high salinity brines |
| title_sort | dilute iota- and kappa-carrageenan solutions with high viscosities in high salinity brines |
| topic | Fracturing fluid Rheology Mobility control Near-wellbore fluid Gelling mechanism Shear thinning ι- and κ-Carrageenan High salinity Polymer solution |
| url | http://hdl.handle.net/20.500.11937/9615 |