Analysis of non-ionic surfactants on the rheological and interparticle response of polymer enhanced colloids for investment casting slurries
Dispersion of ceramic slurries for investment casting is governed by the colloidal solution and influenced by surfactants, where micelles form until a critical micelle concentration (CMC) is attained. Light scattering techniques and rheological methods were used to determine the CMC of three differe...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Open Ceramics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666539523000810 |
| _version_ | 1797736216499585024 |
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| author | Noel A. O'Sullivan David Tanner |
| author_facet | Noel A. O'Sullivan David Tanner |
| author_sort | Noel A. O'Sullivan |
| collection | DOAJ |
| description | Dispersion of ceramic slurries for investment casting is governed by the colloidal solution and influenced by surfactants, where micelles form until a critical micelle concentration (CMC) is attained. Light scattering techniques and rheological methods were used to determine the CMC of three different non-ionic surfactants. The former provides an insight into the: zeta potential; electrical conductivity; and hydrodynamic diameter of the silica/polymer network, where the hydrodynamic diameter portrays a peak shift as the CMC is acquired. Rheological measurements display a reduction in the apparent viscosity with surfactant concentration before increasing by 3.7–15% upon approaching the CMC. The viscoelastic properties display an optimum surfactant concentration, where a stress softening behavior occurs at higher frequencies, known as the Payne effect. As the volume fraction increases, the elastic region extends to lower strains and the onset of recoverable energy occurs below the CMC, while the viscous response exhibits a resistance to flow. |
| first_indexed | 2024-03-12T13:10:26Z |
| format | Article |
| id | doaj.art-99eb8027bdcf4493b9059a37ae626b16 |
| institution | Directory Open Access Journal |
| issn | 2666-5395 |
| language | English |
| last_indexed | 2024-03-12T13:10:26Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Open Ceramics |
| spelling | doaj.art-99eb8027bdcf4493b9059a37ae626b162023-08-28T04:23:21ZengElsevierOpen Ceramics2666-53952023-09-0115100409Analysis of non-ionic surfactants on the rheological and interparticle response of polymer enhanced colloids for investment casting slurriesNoel A. O'Sullivan0David Tanner1School of Engineering and Bernal Institute, University of Limerick, Castletroy, Limerick, V94 T9PX, Munster, IrelandCorresponding author. MSSI Building, University of Limerick, Castletroy, Limerick, V94 T9PX, Ireland.; School of Engineering and Bernal Institute, University of Limerick, Castletroy, Limerick, V94 T9PX, Munster, IrelandDispersion of ceramic slurries for investment casting is governed by the colloidal solution and influenced by surfactants, where micelles form until a critical micelle concentration (CMC) is attained. Light scattering techniques and rheological methods were used to determine the CMC of three different non-ionic surfactants. The former provides an insight into the: zeta potential; electrical conductivity; and hydrodynamic diameter of the silica/polymer network, where the hydrodynamic diameter portrays a peak shift as the CMC is acquired. Rheological measurements display a reduction in the apparent viscosity with surfactant concentration before increasing by 3.7–15% upon approaching the CMC. The viscoelastic properties display an optimum surfactant concentration, where a stress softening behavior occurs at higher frequencies, known as the Payne effect. As the volume fraction increases, the elastic region extends to lower strains and the onset of recoverable energy occurs below the CMC, while the viscous response exhibits a resistance to flow.http://www.sciencedirect.com/science/article/pii/S2666539523000810SuspensionsRefractoriesRheology |
| spellingShingle | Noel A. O'Sullivan David Tanner Analysis of non-ionic surfactants on the rheological and interparticle response of polymer enhanced colloids for investment casting slurries Open Ceramics Suspensions Refractories Rheology |
| title | Analysis of non-ionic surfactants on the rheological and interparticle response of polymer enhanced colloids for investment casting slurries |
| title_full | Analysis of non-ionic surfactants on the rheological and interparticle response of polymer enhanced colloids for investment casting slurries |
| title_fullStr | Analysis of non-ionic surfactants on the rheological and interparticle response of polymer enhanced colloids for investment casting slurries |
| title_full_unstemmed | Analysis of non-ionic surfactants on the rheological and interparticle response of polymer enhanced colloids for investment casting slurries |
| title_short | Analysis of non-ionic surfactants on the rheological and interparticle response of polymer enhanced colloids for investment casting slurries |
| title_sort | analysis of non ionic surfactants on the rheological and interparticle response of polymer enhanced colloids for investment casting slurries |
| topic | Suspensions Refractories Rheology |
| url | http://www.sciencedirect.com/science/article/pii/S2666539523000810 |
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