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Direct Probing of Dispersion Quality of ZrO(2) Nanoparticles Coated by Polyelectrolyte at Different Concentrated Suspensions

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 (ZrO(2)) nanosuspensions in the presence of an alkali-free anionic polye...

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Autores principales: Sarraf, Hamid, Qian, Zhenghua, Škarpová, Ludmila, Wang, Bin, Herbig, Reinhard, Maryška, Martin, Bartovska, Lidmila, Havrda, Jiří, Anvari, Bahman
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4666182/
https://www.ncbi.nlm.nih.gov/pubmed/26619888
http://dx.doi.org/10.1186/s11671-015-1157-z
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author Sarraf, Hamid
Qian, Zhenghua
Škarpová, Ludmila
Wang, Bin
Herbig, Reinhard
Maryška, Martin
Bartovska, Lidmila
Havrda, Jiří
Anvari, Bahman
author_facet Sarraf, Hamid
Qian, Zhenghua
Škarpová, Ludmila
Wang, Bin
Herbig, Reinhard
Maryška, Martin
Bartovska, Lidmila
Havrda, Jiří
Anvari, Bahman
author_sort Sarraf, Hamid
collection PubMed
description 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 (ZrO(2)) 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 ZrO(2) 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 ZrO(2) 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 ZrO(2) 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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spelling pubmed-46661822015-12-11 Direct Probing of Dispersion Quality of ZrO(2) Nanoparticles Coated by Polyelectrolyte at Different Concentrated Suspensions Sarraf, Hamid Qian, Zhenghua Škarpová, Ludmila Wang, Bin Herbig, Reinhard Maryška, Martin Bartovska, Lidmila Havrda, Jiří Anvari, Bahman Nanoscale Res Lett Nano Express 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 (ZrO(2)) 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 ZrO(2) 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 ZrO(2) 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 ZrO(2) 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. Springer US 2015-12-01 /pmc/articles/PMC4666182/ /pubmed/26619888 http://dx.doi.org/10.1186/s11671-015-1157-z Text en © Sarraf et al. 2015 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Nano Express
Sarraf, Hamid
Qian, Zhenghua
Škarpová, Ludmila
Wang, Bin
Herbig, Reinhard
Maryška, Martin
Bartovska, Lidmila
Havrda, Jiří
Anvari, Bahman
Direct Probing of Dispersion Quality of ZrO(2) Nanoparticles Coated by Polyelectrolyte at Different Concentrated Suspensions
title Direct Probing of Dispersion Quality of ZrO(2) Nanoparticles Coated by Polyelectrolyte at Different Concentrated Suspensions
title_full Direct Probing of Dispersion Quality of ZrO(2) Nanoparticles Coated by Polyelectrolyte at Different Concentrated Suspensions
title_fullStr Direct Probing of Dispersion Quality of ZrO(2) Nanoparticles Coated by Polyelectrolyte at Different Concentrated Suspensions
title_full_unstemmed Direct Probing of Dispersion Quality of ZrO(2) Nanoparticles Coated by Polyelectrolyte at Different Concentrated Suspensions
title_short Direct Probing of Dispersion Quality of ZrO(2) Nanoparticles Coated by Polyelectrolyte at Different Concentrated Suspensions
title_sort direct probing of dispersion quality of zro(2) nanoparticles coated by polyelectrolyte at different concentrated suspensions
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4666182/
https://www.ncbi.nlm.nih.gov/pubmed/26619888
http://dx.doi.org/10.1186/s11671-015-1157-z
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