Rod-like particles growing in sol-gel processing of 1:1 molar mixtures of 3-glycidoxypropyltrimethoxysilane and tetraethoxysilane
Autor(a) principal: | |
---|---|
Data de Publicação: | 2017 |
Outros Autores: | , , , , |
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 |