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Maximizing the reduction of vermiculite monolayers while concomitantly assuring colloidal stability of the obtained nematic suspensions
Title data
Xiong, Xiong ; Uhlig, Felix ; Pietsch, Ingmar ; Basheer, Nashmiya ; Rosenfeldt, Sabine ; Papastavrou, Georg ; Peiffer, Stefan ; Lüders, Tillmann ; Breu, Josef:
Maximizing the reduction of vermiculite monolayers while concomitantly assuring colloidal stability of the obtained nematic suspensions.
In: Applied Clay Science.
Vol. 289
(2026)
.
- 108233.
ISSN 0169-1317
DOI: https://doi.org/10.1016/j.clay.2026.108233
Abstract in another language
Vermiculite monolayers are typically two orders of magnitude larger than that of montmorillonite. The material therefore bears great potential for barrier improvement in polymer nanocomposites. Aside from the barrier improvement potential, vermiculite additionally holds promises for accelerating polymer degradation mitigating the microplastic issue. Structural iron will produce reactive oxygen species when submitted to natural anoxic/oxic cycles that have potential to render the surface more hydrophilic, and thus more attractive for colonization by fungi and bacteria. As a first step, here a concomitant optimization of vermiculite delamination, the colloidal stability of the resulting suspensions, and the extent of structural iron reduction, ultimately linked to reactive oxygen species generation, is presented. Delamination of vermiculite by one-dimensional dissolution produced monolayers with a huge aspect ratio of 9000 on average. Delamination, moreover, allows for a substantial increase in reduction with an ascorbate buffer as compared to stacked vermiculite tactoids. While for pristine or restacked Mg- and Na-vermiculite tactoids the reduction level was limited to 28%, the delaminated Li-vermiculite could be reduced to 44% of the total structural iron. This substantial difference is interpreted as indication that electron injections through the edges for delaminated types may be supplemented by injections through the basal planes of delaminated vermiculite.
Further data
| Item Type: |
Article in a journal
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| Refereed: |
Yes |
| Keywords: |
Vermiculite monolayers; Gas-barrier performance; Delamination; Reactive oxygen species
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| Institutions of the University: |
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Ecological Microbiology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Ecological Microbiology > Chair Ecological Microbiology - Univ.-Prof. Dr. Tillmann Lüders
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry I - Kolloidale Strukturen und Energiematerialien
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry II - Interfaces and Nanoanalytics
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry II - Interfaces and Nanoanalytics > Chair Physical Chemistry II - Interfaces and Nanoanalytics - Univ.-Prof. Dr. Georg Papastavrou
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Colloids for Electrochemical Energy storage
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Colloids for Electrochemical Energy storage > Chair Chair Inorganic Colloids for Electrochemical Energy storage - Univ.-Prof. Dr. Josef Breu
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Hydrology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Hydrology > Chair Hydrology - Univ.-Prof. Dr. Stefan Peiffer
Research Institutions
Research Institutions > Central research institutes
Research Institutions > Central research institutes > Bayreuth Center of Ecology and Environmental Research- BayCEER
Research Institutions > Affiliated Institutes
Research Institutions > Affiliated Institutes > Bavarian Polymer Institute (BPI)
Research Institutions > Collaborative Research Centers, Research Unit > SFB 1357 - MIKROPLASTIK |
| Result of work at the UBT: |
Yes |
| DDC Subjects: |
500 Science
500 Science > 540 Chemistry |
| Date Deposited: |
23 Apr 2026 06:49 |
| Last Modified: |
27 Apr 2026 10:21 |
| URI: |
https://eref.uni-bayreuth.de/id/eprint/96899 |
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