Rod-like particles growing in sol-gel processing of 1:1 molar mixtures of 3-glycidoxypropyltrimethoxysilane and tetraethoxysilane

Detalhes bibliográficos
Autor(a) principal: Vollet, Dimas Roberto [UNESP]
Data de Publicação: 2017
Outros Autores: Barreiro, Luiz Antonio [UNESP], Awano, Carlos Miranda [UNESP], De Vicente, Fabio Simoes [UNESP], Yoshida, Makoto [UNESP], Donatti, Dario Antonio [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1107/S1600576717002357
http://hdl.handle.net/11449/174429
Resumo: The growth kinetics and the structure of organic/silica hybrids prepared from acid hydrolysis of 1:1 molar mixtures of 3-glycidoxypropyltrimethoxysilane and tetraethoxysilane were studied by small-Angle X-ray scattering (SAXS) at 315, 325 and 335K. The evolution of the SAXS intensity is compatible with the growth of silica-rich domains by aggregation from a fixed number of primary particles. Two distinct growth regimes could be identified by analyzing the relation I(0) ∝ R g D between the intensity extrapolated to zero I(0), the radius of gyration R g of the aggregates and the exponent D, which gives information on the geometry and the mechanism of growth of the aggregates. An initial period was attributed to the growth of rod-like particles with approximately the same radius and variable length. At more advanced degrees of aggregation the process was controlled by the growth of larger aggregates with higher-order dimensionality. A narrow distribution of cylinder lengths given by the Schulz function fitted the experimental SAXS data well during the most part of the initial regime of cylindrical particle growth. These particles were later found as rod-like subunits of the larger aggregates grown at more advanced degrees of aggregation. Some condensation possibilities yielding the formation of structures compatible with those inferred from the present study are discussed.
id UNSP_434e0e706b05d16b0f4d71fad993a421
oai_identifier_str oai:repositorio.unesp.br:11449/174429
network_acronym_str UNSP
network_name_str Repositório Institucional da UNESP
repository_id_str 2946
spelling Rod-like particles growing in sol-gel processing of 1:1 molar mixtures of 3-glycidoxypropyltrimethoxysilane and tetraethoxysilane3-glycidoxypropyltrimethoxysilaneaggregationrod-like particlesSAXSsmall-Angle X-ray scatteringtetraethoxysilaneThe growth kinetics and the structure of organic/silica hybrids prepared from acid hydrolysis of 1:1 molar mixtures of 3-glycidoxypropyltrimethoxysilane and tetraethoxysilane were studied by small-Angle X-ray scattering (SAXS) at 315, 325 and 335K. The evolution of the SAXS intensity is compatible with the growth of silica-rich domains by aggregation from a fixed number of primary particles. Two distinct growth regimes could be identified by analyzing the relation I(0) ∝ R g D between the intensity extrapolated to zero I(0), the radius of gyration R g of the aggregates and the exponent D, which gives information on the geometry and the mechanism of growth of the aggregates. An initial period was attributed to the growth of rod-like particles with approximately the same radius and variable length. At more advanced degrees of aggregation the process was controlled by the growth of larger aggregates with higher-order dimensionality. A narrow distribution of cylinder lengths given by the Schulz function fitted the experimental SAXS data well during the most part of the initial regime of cylindrical particle growth. These particles were later found as rod-like subunits of the larger aggregates grown at more advanced degrees of aggregation. Some condensation possibilities yielding the formation of structures compatible with those inferred from the present study are discussed.Física UNESP-Universidade Estadual Paulista, 178 Rio ClaroFísica UNESP-Universidade Estadual Paulista, 178 Rio ClaroUniversidade Estadual Paulista (Unesp)Vollet, Dimas Roberto [UNESP]Barreiro, Luiz Antonio [UNESP]Awano, Carlos Miranda [UNESP]De Vicente, Fabio Simoes [UNESP]Yoshida, Makoto [UNESP]Donatti, Dario Antonio [UNESP]2018-12-11T17:11:04Z2018-12-11T17:11:04Z2017-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article489-497http://dx.doi.org/10.1107/S1600576717002357Journal of Applied Crystallography, v. 50, p. 489-497.1600-57670021-8898http://hdl.handle.net/11449/17442910.1107/S16005767170023572-s2.0-850171023128837845109364729009799654429389284082163499573780000-0001-7696-3004Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Applied Crystallography1,6351,635info:eu-repo/semantics/openAccess2021-10-23T15:25:27Zoai:repositorio.unesp.br:11449/174429Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:07:38.691369Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Rod-like particles growing in sol-gel processing of 1:1 molar mixtures of 3-glycidoxypropyltrimethoxysilane and tetraethoxysilane
title Rod-like particles growing in sol-gel processing of 1:1 molar mixtures of 3-glycidoxypropyltrimethoxysilane and tetraethoxysilane
spellingShingle Rod-like particles growing in sol-gel processing of 1:1 molar mixtures of 3-glycidoxypropyltrimethoxysilane and tetraethoxysilane
Vollet, Dimas Roberto [UNESP]
3-glycidoxypropyltrimethoxysilane
aggregation
rod-like particles
SAXS
small-Angle X-ray scattering
tetraethoxysilane
title_short Rod-like particles growing in sol-gel processing of 1:1 molar mixtures of 3-glycidoxypropyltrimethoxysilane and tetraethoxysilane
title_full Rod-like particles growing in sol-gel processing of 1:1 molar mixtures of 3-glycidoxypropyltrimethoxysilane and tetraethoxysilane
title_fullStr Rod-like particles growing in sol-gel processing of 1:1 molar mixtures of 3-glycidoxypropyltrimethoxysilane and tetraethoxysilane
title_full_unstemmed Rod-like particles growing in sol-gel processing of 1:1 molar mixtures of 3-glycidoxypropyltrimethoxysilane and tetraethoxysilane
title_sort Rod-like particles growing in sol-gel processing of 1:1 molar mixtures of 3-glycidoxypropyltrimethoxysilane and tetraethoxysilane
author Vollet, Dimas Roberto [UNESP]
author_facet Vollet, Dimas Roberto [UNESP]
Barreiro, Luiz Antonio [UNESP]
Awano, Carlos Miranda [UNESP]
De Vicente, Fabio Simoes [UNESP]
Yoshida, Makoto [UNESP]
Donatti, Dario Antonio [UNESP]
author_role author
author2 Barreiro, Luiz Antonio [UNESP]
Awano, Carlos Miranda [UNESP]
De Vicente, Fabio Simoes [UNESP]
Yoshida, Makoto [UNESP]
Donatti, Dario Antonio [UNESP]
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Vollet, Dimas Roberto [UNESP]
Barreiro, Luiz Antonio [UNESP]
Awano, Carlos Miranda [UNESP]
De Vicente, Fabio Simoes [UNESP]
Yoshida, Makoto [UNESP]
Donatti, Dario Antonio [UNESP]
dc.subject.por.fl_str_mv 3-glycidoxypropyltrimethoxysilane
aggregation
rod-like particles
SAXS
small-Angle X-ray scattering
tetraethoxysilane
topic 3-glycidoxypropyltrimethoxysilane
aggregation
rod-like particles
SAXS
small-Angle X-ray scattering
tetraethoxysilane
description The growth kinetics and the structure of organic/silica hybrids prepared from acid hydrolysis of 1:1 molar mixtures of 3-glycidoxypropyltrimethoxysilane and tetraethoxysilane were studied by small-Angle X-ray scattering (SAXS) at 315, 325 and 335K. The evolution of the SAXS intensity is compatible with the growth of silica-rich domains by aggregation from a fixed number of primary particles. Two distinct growth regimes could be identified by analyzing the relation I(0) ∝ R g D between the intensity extrapolated to zero I(0), the radius of gyration R g of the aggregates and the exponent D, which gives information on the geometry and the mechanism of growth of the aggregates. An initial period was attributed to the growth of rod-like particles with approximately the same radius and variable length. At more advanced degrees of aggregation the process was controlled by the growth of larger aggregates with higher-order dimensionality. A narrow distribution of cylinder lengths given by the Schulz function fitted the experimental SAXS data well during the most part of the initial regime of cylindrical particle growth. These particles were later found as rod-like subunits of the larger aggregates grown at more advanced degrees of aggregation. Some condensation possibilities yielding the formation of structures compatible with those inferred from the present study are discussed.
publishDate 2017
dc.date.none.fl_str_mv 2017-01-01
2018-12-11T17:11:04Z
2018-12-11T17:11:04Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1107/S1600576717002357
Journal of Applied Crystallography, v. 50, p. 489-497.
1600-5767
0021-8898
http://hdl.handle.net/11449/174429
10.1107/S1600576717002357
2-s2.0-85017102312
8837845109364729
0097996544293892
8408216349957378
0000-0001-7696-3004
url http://dx.doi.org/10.1107/S1600576717002357
http://hdl.handle.net/11449/174429
identifier_str_mv Journal of Applied Crystallography, v. 50, p. 489-497.
1600-5767
0021-8898
10.1107/S1600576717002357
2-s2.0-85017102312
8837845109364729
0097996544293892
8408216349957378
0000-0001-7696-3004
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Journal of Applied Crystallography
1,635
1,635
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 489-497
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1808128465059184640