Surface chemistry–microstructure–rheology of high and low crystallinity KGa-1b and KGa-2 kaolinite suspensions.
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| Title: | Surface chemistry–microstructure–rheology of high and low crystallinity KGa-1b and KGa-2 kaolinite suspensions. |
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| Authors: | Au, Pek-Ing1, Clode, Peta2, Smart, Roger St.C.3, Leong, Yee-Kwong1 leong@mech.uwa.edu.au |
| Source: | Colloids & Surfaces A: Physicochemical & Engineering Aspects. Nov2015, Vol. 484, p354-364. 11p. |
| Subjects: | Surface chemistry, Metal microstructure, Rheology, Crystallinity, Potassium compounds, Kaolinite, Suspensions (Chemistry) |
| Abstract: | This study investigated the surface chemistry–microstructure–rheology relationship of two very well characterised, low impurity CMS source kaolinites; low defect KGa-1b and high defect KGa-2. The knowledge gained will improve the overall understanding by acting as a reference material for comparison with other studies. The trend of the yield stress–pH result was adopted to investigate kaolinite properties or factors that affect this trend. Both the KGa-1b and KGa-2 kaolinite slurries displayed similar zeta potential–pH and yield stress–pH behaviour. Crystallinity and particle size therefore did not affect the trend of the yield stress–pH and zeta potential–pH behaviour. The larger yield stress of the finer KGa-2 slurries is due to a higher particle concentration. Both kaolinite slurries exhibited a maximum yield stress at zero zeta potential. Their yield stress–solid volume fraction data were found to obey a power law model with the same exponent value of 3 accounting for a fractal dimension of 2.3 unaffected by pH. Cryo-SEM images of the vitrified microstructure of 35 wt% KGa-1b and 15 wt% KGa-2 suspensions at the maximum yield stress showed a 3-D microstructure formed by compacted clay aggregates which themselves are formed by a mixture of particle interaction configurations – face–face with stair–step feature and edge–face. Particle interaction modelling was discussed. [ABSTRACT FROM AUTHOR] |
| Copyright of Colloids & Surfaces A: Physicochemical & Engineering Aspects is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 109492921 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Surface chemistry–microstructure–rheology of high and low crystallinity KGa-1b and KGa-2 kaolinite suspensions. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Au%2C+Pek-Ing%22">Au, Pek-Ing</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Clode%2C+Peta%22">Clode, Peta</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Smart%2C+Roger+St%2EC%2E%22">Smart, Roger St.C.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Leong%2C+Yee-Kwong%22">Leong, Yee-Kwong</searchLink><relatesTo>1</relatesTo><i> leong@mech.uwa.edu.au</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Colloids+%26+Surfaces+A%3A+Physicochemical+%26+Engineering+Aspects%22">Colloids & Surfaces A: Physicochemical & Engineering Aspects</searchLink>. Nov2015, Vol. 484, p354-364. 11p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Surface+chemistry%22">Surface chemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Metal+microstructure%22">Metal microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Rheology%22">Rheology</searchLink><br /><searchLink fieldCode="DE" term="%22Crystallinity%22">Crystallinity</searchLink><br /><searchLink fieldCode="DE" term="%22Potassium+compounds%22">Potassium compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Kaolinite%22">Kaolinite</searchLink><br /><searchLink fieldCode="DE" term="%22Suspensions+%28Chemistry%29%22">Suspensions (Chemistry)</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This study investigated the surface chemistry–microstructure–rheology relationship of two very well characterised, low impurity CMS source kaolinites; low defect KGa-1b and high defect KGa-2. The knowledge gained will improve the overall understanding by acting as a reference material for comparison with other studies. The trend of the yield stress–pH result was adopted to investigate kaolinite properties or factors that affect this trend. Both the KGa-1b and KGa-2 kaolinite slurries displayed similar zeta potential–pH and yield stress–pH behaviour. Crystallinity and particle size therefore did not affect the trend of the yield stress–pH and zeta potential–pH behaviour. The larger yield stress of the finer KGa-2 slurries is due to a higher particle concentration. Both kaolinite slurries exhibited a maximum yield stress at zero zeta potential. Their yield stress–solid volume fraction data were found to obey a power law model with the same exponent value of 3 accounting for a fractal dimension of 2.3 unaffected by pH. Cryo-SEM images of the vitrified microstructure of 35 wt% KGa-1b and 15 wt% KGa-2 suspensions at the maximum yield stress showed a 3-D microstructure formed by compacted clay aggregates which themselves are formed by a mixture of particle interaction configurations – face–face with stair–step feature and edge–face. Particle interaction modelling was discussed. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Colloids & Surfaces A: Physicochemical & Engineering Aspects is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.colsurfa.2015.08.013 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 11 StartPage: 354 Subjects: – SubjectFull: Surface chemistry Type: general – SubjectFull: Metal microstructure Type: general – SubjectFull: Rheology Type: general – SubjectFull: Crystallinity Type: general – SubjectFull: Potassium compounds Type: general – SubjectFull: Kaolinite Type: general – SubjectFull: Suspensions (Chemistry) Type: general Titles: – TitleFull: Surface chemistry–microstructure–rheology of high and low crystallinity KGa-1b and KGa-2 kaolinite suspensions. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Au, Pek-Ing – PersonEntity: Name: NameFull: Clode, Peta – PersonEntity: Name: NameFull: Smart, Roger St.C. – PersonEntity: Name: NameFull: Leong, Yee-Kwong IsPartOfRelationships: – BibEntity: Dates: – D: 05 M: 11 Text: Nov2015 Type: published Y: 2015 Identifiers: – Type: issn-print Value: 09277757 Numbering: – Type: volume Value: 484 Titles: – TitleFull: Colloids & Surfaces A: Physicochemical & Engineering Aspects Type: main |
| ResultId | 1 |
