Visualization of chemical bonding in a silica-filled rubber nanocomposite using STEM-EELS

Abstract In nanocomposites, the adhesion between nanofillers and the polymeric matrix is key to the mechanical properties. The strength and spatial distribution of the adhesive layer around the nanofillers are important, particularly the presence of chemical bonding between the nanofillers and matri...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Yohei K. Sato, Yasufumi Kuwauchi, Wakana Miyoshi, Hiroshi Jinnai
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/bad8bd89ad3d4770b544602e7f3272f4
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:bad8bd89ad3d4770b544602e7f3272f4
record_format	dspace
spelling	oai:doaj.org-article:bad8bd89ad3d4770b544602e7f3272f42021-12-02T11:43:35ZVisualization of chemical bonding in a silica-filled rubber nanocomposite using STEM-EELS10.1038/s41598-020-78393-02045-2322https://doaj.org/article/bad8bd89ad3d4770b544602e7f3272f42020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-78393-0https://doaj.org/toc/2045-2322Abstract In nanocomposites, the adhesion between nanofillers and the polymeric matrix is key to the mechanical properties. The strength and spatial distribution of the adhesive layer around the nanofillers are important, particularly the presence of chemical bonding between the nanofillers and matrix. In this work, we studied a styrene-butadiene rubber composite filled with silica nanoparticles to visualize the spatial distribution of the adhesive layer. A silane coupling agent (SCA) was added to the nanocomposite for strong adhesion. The reaction involving the SCA on the silica surface was investigated by scanning transmission electron microscopy combined with electron energy-loss spectroscopy. Si-L2,3 spectra of the silica-filled rubber nanocomposite without the SCA were the same around the nanofillers, whereas in the nanocomposite containing the SCA the spectra were position-dependent. The spectra were fitted with the intensity profiles of the Si-L2,3 spectra of silica and SCA by multiple linear least-squares fitting. The fitting coefficients of silica and SCA were used to map the spatial distribution of the chemical bonding between silica and rubber chains. Chemical bonding was observed around the silica nanoparticles but not in the SBR matrix region, providing direct evidence of the reinforcing mechanism in the silica-filled rubber nanocomposite.Yohei K. SatoYasufumi KuwauchiWakana MiyoshiHiroshi JinnaiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-8 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yohei K. Sato Yasufumi Kuwauchi Wakana Miyoshi Hiroshi Jinnai Visualization of chemical bonding in a silica-filled rubber nanocomposite using STEM-EELS
description	Abstract In nanocomposites, the adhesion between nanofillers and the polymeric matrix is key to the mechanical properties. The strength and spatial distribution of the adhesive layer around the nanofillers are important, particularly the presence of chemical bonding between the nanofillers and matrix. In this work, we studied a styrene-butadiene rubber composite filled with silica nanoparticles to visualize the spatial distribution of the adhesive layer. A silane coupling agent (SCA) was added to the nanocomposite for strong adhesion. The reaction involving the SCA on the silica surface was investigated by scanning transmission electron microscopy combined with electron energy-loss spectroscopy. Si-L2,3 spectra of the silica-filled rubber nanocomposite without the SCA were the same around the nanofillers, whereas in the nanocomposite containing the SCA the spectra were position-dependent. The spectra were fitted with the intensity profiles of the Si-L2,3 spectra of silica and SCA by multiple linear least-squares fitting. The fitting coefficients of silica and SCA were used to map the spatial distribution of the chemical bonding between silica and rubber chains. Chemical bonding was observed around the silica nanoparticles but not in the SBR matrix region, providing direct evidence of the reinforcing mechanism in the silica-filled rubber nanocomposite.
format	article
author	Yohei K. Sato Yasufumi Kuwauchi Wakana Miyoshi Hiroshi Jinnai
author_facet	Yohei K. Sato Yasufumi Kuwauchi Wakana Miyoshi Hiroshi Jinnai
author_sort	Yohei K. Sato
title	Visualization of chemical bonding in a silica-filled rubber nanocomposite using STEM-EELS
title_short	Visualization of chemical bonding in a silica-filled rubber nanocomposite using STEM-EELS
title_full	Visualization of chemical bonding in a silica-filled rubber nanocomposite using STEM-EELS
title_fullStr	Visualization of chemical bonding in a silica-filled rubber nanocomposite using STEM-EELS
title_full_unstemmed	Visualization of chemical bonding in a silica-filled rubber nanocomposite using STEM-EELS
title_sort	visualization of chemical bonding in a silica-filled rubber nanocomposite using stem-eels
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/bad8bd89ad3d4770b544602e7f3272f4
work_keys_str_mv	AT yoheiksato visualizationofchemicalbondinginasilicafilledrubbernanocompositeusingstemeels AT yasufumikuwauchi visualizationofchemicalbondinginasilicafilledrubbernanocompositeusingstemeels AT wakanamiyoshi visualizationofchemicalbondinginasilicafilledrubbernanocompositeusingstemeels AT hiroshijinnai visualizationofchemicalbondinginasilicafilledrubbernanocompositeusingstemeels
_version_	1718395366610567168

Visualization of chemical bonding in a silica-filled rubber nanocomposite using STEM-EELS

Ejemplares similares