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A review of zeta potential measurements using electroacoustics. Adv Colloid Interface Sci 2022; 309:102778. [DOI: 10.1016/j.cis.2022.102778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 09/10/2022] [Accepted: 09/15/2022] [Indexed: 11/23/2022]
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Sarraf H, Qian Z, Škarpová L, Wang B, Herbig R, Maryška M, Bartovska L, Havrda J, Anvari B. Direct Probing of Dispersion Quality of ZrO2 Nanoparticles Coated by Polyelectrolyte at Different Concentrated Suspensions. NANOSCALE RESEARCH LETTERS 2015; 10:456. [PMID: 26619888 PMCID: PMC4666182 DOI: 10.1186/s11671-015-1157-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Accepted: 11/09/2015] [Indexed: 06/05/2023]
Abstract
This study reports useful application of the electrokinetic sonic amplitude (ESA) technique in combination with rheometry and electron microscopy techniques for direct probing the stability of low and high-concentrated zirconia (ZrO2) nanosuspensions in the presence of an alkali-free anionic polyelectrolyte dispersant Dolapix CE64. A comparative study of the electrokinetic characteristics and the rheological behavior of concentrated ZrO2 nanosuspensions has been done. Good agreement was obtained from relationship between the electrokinetic characteristics (zeta potential, ESA signal), viscosity, and its pH dependence for each concentrated ZrO2 nanosuspension with different dispersant concentration in the range of 0.9-1.5 mass%. A nanoscale colloidal hypothesis is proposed to illustrate that the addition of different amounts of dispersant influences on both the stability and the electrokinetic and rheological properties of concentrated ZrO2 nanosuspensions. It is found that an optimum amount of 1.4 mass% dispersant at the inherent pH (>9.2) can be attached fully onto the nanoparticles with sufficient electrosteric dispersion effects, suitable for casting applications. Supplementary scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HR-TEM) analyses followed by colorization effect were taken to verify the visible interaction between dispersant and nanoparticles surfaces. SEM and HR-TEM images proved the existence of visible coverage of dispersant on the surface of individual nanoparticles and showed that thin polyelectrolyte layers were physically bound onto the particles' surfaces. This study will be of interest to materials scientists and engineers who are dealing with dispersion technology, nanoparticle surface treatments, functionalization, characterization, and application of bio/nanoparticle suspensions at various concentrations using different types of polymers.
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Affiliation(s)
- Hamid Sarraf
- State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing, 210016, China.
- Western Governors University, 1001 Fourth Avenue, Seattle, WA, 98154-1101, USA.
- NANOPRODEX LLC, NW, 48th Ave, Vancouver, WA, 98685, USA.
| | - Zhenghua Qian
- State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing, 210016, China.
| | - Ludmila Škarpová
- University of Chemistry and Technology, 166 28, Prague, Czech Republic
| | - Bin Wang
- State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing, 210016, China
| | - Reinhard Herbig
- Institute of Electronic and Sensor Materials, TU Bergakademie Freiberg, Gustav-Zeeunter-Str. 3, Freiberg, 09596, Germany
| | - Martin Maryška
- University of Chemistry and Technology, 166 28, Prague, Czech Republic
| | - Lidmila Bartovska
- University of Chemistry and Technology, 166 28, Prague, Czech Republic
| | - Jiří Havrda
- University of Chemistry and Technology, 166 28, Prague, Czech Republic
| | - Bahman Anvari
- Department of Bioengineering, 900 University Ave., University of California, Riverside, CA, 92521, USA
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Electrophoretic deposition of yttria-stabilised zirconia powder from aqueous suspensions for fabricating ceramics with channel-like pores. Ann Ital Chir 2014. [DOI: 10.1016/j.jeurceramsoc.2013.08.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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