Creep Tests, Flow Birefringence Measurements, and Flow Visualization of Aqueous Solutions of CTAB and NaSal in Shear Flow between Parallel Plates
Creep tests, flow birefringence measurements, and flow visualization experiments in shear flows between parallel plates were carried out for aqueous solutions of cetyltrimethylammonium bromide (CTAB) and sodium salicylate (NaSal) with excess of NaSal. The mol concentration of CTAB was fixed to 0.030...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2009-10-01
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| Series: | Journal of Fluid Science and Technology |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jfst/4/3/4_3_699/_pdf/-char/en |
| _version_ | 1818942448819240960 |
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| author | Atsushi YAMASHITA Kouki MORI Kazuhiro SAWA Takehiro YAMAMOTO |
| author_facet | Atsushi YAMASHITA Kouki MORI Kazuhiro SAWA Takehiro YAMAMOTO |
| author_sort | Atsushi YAMASHITA |
| collection | DOAJ |
| description | Creep tests, flow birefringence measurements, and flow visualization experiments in shear flows between parallel plates were carried out for aqueous solutions of cetyltrimethylammonium bromide (CTAB) and sodium salicylate (NaSal) with excess of NaSal. The mol concentration of CTAB was fixed to 0.030 mol/l and the concentration ratio of NaSal to CTAB was varied. The creep tests indicate that it requires long time to develop micellar network structures for low to moderate concentrations at low shear stresses. Under conditions of shear rate at which the shear-thickening property in viscosity is observed in a flow curve, periodical changes in flow birefringence and shear stress occur and these frequencies are almost the same as that of the emergency of white turbidity observed in the flow visualization. These results indicate that relatively large structures of micellar network are induced by the shear flow and repeatedly appear and disappear. |
| first_indexed | 2024-12-20T07:11:36Z |
| format | Article |
| id | doaj.art-6b9f3d0c4127469ebe9bbb4f1ab1f66b |
| institution | Directory Open Access Journal |
| issn | 1880-5558 |
| language | English |
| last_indexed | 2024-12-20T07:11:36Z |
| publishDate | 2009-10-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Fluid Science and Technology |
| spelling | doaj.art-6b9f3d0c4127469ebe9bbb4f1ab1f66b2022-12-21T19:48:53ZengThe Japan Society of Mechanical EngineersJournal of Fluid Science and Technology1880-55582009-10-014369971010.1299/jfst.4.699jfstCreep Tests, Flow Birefringence Measurements, and Flow Visualization of Aqueous Solutions of CTAB and NaSal in Shear Flow between Parallel PlatesAtsushi YAMASHITA0Kouki MORI1Kazuhiro SAWA2Takehiro YAMAMOTO3Department of Mechanical Engineering, Graduate School of Engineering, Osaka UniversityDepartment of Mechanical Engineering, Graduate School of Engineering, Osaka UniversityDepartment of Mechanical Engineering, Graduate School of Engineering, Osaka UniversityDepartment of Mechanical Engineering, Graduate School of Engineering, Osaka UniversityCreep tests, flow birefringence measurements, and flow visualization experiments in shear flows between parallel plates were carried out for aqueous solutions of cetyltrimethylammonium bromide (CTAB) and sodium salicylate (NaSal) with excess of NaSal. The mol concentration of CTAB was fixed to 0.030 mol/l and the concentration ratio of NaSal to CTAB was varied. The creep tests indicate that it requires long time to develop micellar network structures for low to moderate concentrations at low shear stresses. Under conditions of shear rate at which the shear-thickening property in viscosity is observed in a flow curve, periodical changes in flow birefringence and shear stress occur and these frequencies are almost the same as that of the emergency of white turbidity observed in the flow visualization. These results indicate that relatively large structures of micellar network are induced by the shear flow and repeatedly appear and disappear.https://www.jstage.jst.go.jp/article/jfst/4/3/4_3_699/_pdf/-char/ensurfactant solutionscreep testflow birefringenceturbiditywormlike micellesctab/nasalshear flow |
| spellingShingle | Atsushi YAMASHITA Kouki MORI Kazuhiro SAWA Takehiro YAMAMOTO Creep Tests, Flow Birefringence Measurements, and Flow Visualization of Aqueous Solutions of CTAB and NaSal in Shear Flow between Parallel Plates Journal of Fluid Science and Technology surfactant solutions creep test flow birefringence turbidity wormlike micelles ctab/nasal shear flow |
| title | Creep Tests, Flow Birefringence Measurements, and Flow Visualization of Aqueous Solutions of CTAB and NaSal in Shear Flow between Parallel Plates |
| title_full | Creep Tests, Flow Birefringence Measurements, and Flow Visualization of Aqueous Solutions of CTAB and NaSal in Shear Flow between Parallel Plates |
| title_fullStr | Creep Tests, Flow Birefringence Measurements, and Flow Visualization of Aqueous Solutions of CTAB and NaSal in Shear Flow between Parallel Plates |
| title_full_unstemmed | Creep Tests, Flow Birefringence Measurements, and Flow Visualization of Aqueous Solutions of CTAB and NaSal in Shear Flow between Parallel Plates |
| title_short | Creep Tests, Flow Birefringence Measurements, and Flow Visualization of Aqueous Solutions of CTAB and NaSal in Shear Flow between Parallel Plates |
| title_sort | creep tests flow birefringence measurements and flow visualization of aqueous solutions of ctab and nasal in shear flow between parallel plates |
| topic | surfactant solutions creep test flow birefringence turbidity wormlike micelles ctab/nasal shear flow |
| url | https://www.jstage.jst.go.jp/article/jfst/4/3/4_3_699/_pdf/-char/en |
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