Physicochemical aspects of epoxide driven nano-ZrO2 hydrogel formation: Milder kinetics for better properties
Robust and highly transparent quasi amorphous ZrO2-water-glycerol hydrogels were obtained in a mild one pot procedure, based on the 2,3-epoxy-1-propanol driven alkalinization. SAXS-based characterization of the sol-gel transition revealed that an homogeneously nucleated sol composed of 2 nm primary...
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Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14779226_v45_n24_p9920_Oestreicher http://hdl.handle.net/20.500.12110/paper_14779226_v45_n24_p9920_Oestreicher |
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paper:paper_14779226_v45_n24_p9920_Oestreicher2023-06-08T16:18:16Z Physicochemical aspects of epoxide driven nano-ZrO2 hydrogel formation: Milder kinetics for better properties Oestreicher, Victor Santiago Jesus Perullini, Ana Mercedes Gelation Glycerol Light scattering Sol-gel process Sol-gels Zirconium alloys Conductivity measurements Critical size Hydrogel formation In-situ assessment One-pot procedures Physicochemical aspects Primary particles Sol-gel transitions Hydrogels Robust and highly transparent quasi amorphous ZrO2-water-glycerol hydrogels were obtained in a mild one pot procedure, based on the 2,3-epoxy-1-propanol driven alkalinization. SAXS-based characterization of the sol-gel transition revealed that an homogeneously nucleated sol composed of 2 nm primary particles continuously grows up to a critical size of 5-6 nm, when gelation takes place. These particles reach a size of 8-10 nm, depending on the Zr(iv) concentration. Conductivity measurements offer an overall in situ assessment of the reaction rate. The gelled samples share a common trend: once the conductivity decays to 40% of the starting value, the primary particles nucleate and when this decay reaches 20%, the sol-gel transition takes place. The mild conditions employed herein prevent massive ripening and recrystallization leaving hydrogels with extremely low undesired visible light scattering. This suitable nanostructure was achieved in a wide range of total Zr(iv) concentrations or water to glycerol ratios. © 2016 The Royal Society of Chemistry. Fil:Oestreicher, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Perullini, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14779226_v45_n24_p9920_Oestreicher http://hdl.handle.net/20.500.12110/paper_14779226_v45_n24_p9920_Oestreicher |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
Gelation Glycerol Light scattering Sol-gel process Sol-gels Zirconium alloys Conductivity measurements Critical size Hydrogel formation In-situ assessment One-pot procedures Physicochemical aspects Primary particles Sol-gel transitions Hydrogels |
spellingShingle |
Gelation Glycerol Light scattering Sol-gel process Sol-gels Zirconium alloys Conductivity measurements Critical size Hydrogel formation In-situ assessment One-pot procedures Physicochemical aspects Primary particles Sol-gel transitions Hydrogels Oestreicher, Victor Santiago Jesus Perullini, Ana Mercedes Physicochemical aspects of epoxide driven nano-ZrO2 hydrogel formation: Milder kinetics for better properties |
topic_facet |
Gelation Glycerol Light scattering Sol-gel process Sol-gels Zirconium alloys Conductivity measurements Critical size Hydrogel formation In-situ assessment One-pot procedures Physicochemical aspects Primary particles Sol-gel transitions Hydrogels |
description |
Robust and highly transparent quasi amorphous ZrO2-water-glycerol hydrogels were obtained in a mild one pot procedure, based on the 2,3-epoxy-1-propanol driven alkalinization. SAXS-based characterization of the sol-gel transition revealed that an homogeneously nucleated sol composed of 2 nm primary particles continuously grows up to a critical size of 5-6 nm, when gelation takes place. These particles reach a size of 8-10 nm, depending on the Zr(iv) concentration. Conductivity measurements offer an overall in situ assessment of the reaction rate. The gelled samples share a common trend: once the conductivity decays to 40% of the starting value, the primary particles nucleate and when this decay reaches 20%, the sol-gel transition takes place. The mild conditions employed herein prevent massive ripening and recrystallization leaving hydrogels with extremely low undesired visible light scattering. This suitable nanostructure was achieved in a wide range of total Zr(iv) concentrations or water to glycerol ratios. © 2016 The Royal Society of Chemistry. |
author |
Oestreicher, Victor Santiago Jesus Perullini, Ana Mercedes |
author_facet |
Oestreicher, Victor Santiago Jesus Perullini, Ana Mercedes |
author_sort |
Oestreicher, Victor Santiago Jesus |
title |
Physicochemical aspects of epoxide driven nano-ZrO2 hydrogel formation: Milder kinetics for better properties |
title_short |
Physicochemical aspects of epoxide driven nano-ZrO2 hydrogel formation: Milder kinetics for better properties |
title_full |
Physicochemical aspects of epoxide driven nano-ZrO2 hydrogel formation: Milder kinetics for better properties |
title_fullStr |
Physicochemical aspects of epoxide driven nano-ZrO2 hydrogel formation: Milder kinetics for better properties |
title_full_unstemmed |
Physicochemical aspects of epoxide driven nano-ZrO2 hydrogel formation: Milder kinetics for better properties |
title_sort |
physicochemical aspects of epoxide driven nano-zro2 hydrogel formation: milder kinetics for better properties |
publishDate |
2016 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14779226_v45_n24_p9920_Oestreicher http://hdl.handle.net/20.500.12110/paper_14779226_v45_n24_p9920_Oestreicher |
work_keys_str_mv |
AT oestreichervictorsantiagojesus physicochemicalaspectsofepoxidedrivennanozro2hydrogelformationmilderkineticsforbetterproperties AT perullinianamercedes physicochemicalaspectsofepoxidedrivennanozro2hydrogelformationmilderkineticsforbetterproperties |
_version_ |
1768545298873843712 |