High-energy dissipation performance in epoxy coatings by the synergistic effect of carbon nanotube/block copolymer conjugates

Hierarchical assembly of hard/soft nanoparticles holds great potential as reinforcements for polymer nanocomposites with tailored properties. Here, we present a facile strategy to integrate polystyrene-grafted carbon nanotubes (PSgCNT) (0.05-0.3 wt %) and poly(styrene-b- [isoprene-ran-epoxyisoprene]...

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Autores principales:	Garate, H., Bianchi, M., Pietrasanta, L.I., Goyanes, S., D'Accorso, N.B.
Formato:	JOUR
Materias:	Block copolymer (BCP) Carbon nanotubes (CNT) Energy dissipation Epoxy coatings Nanocomposites Wear resistance Atomic force microscopy Block copolymers Coatings Elastic moduli Epoxy resins Nanotubes Plastic coatings Scanning electron microscopy Styrene Yarn Force-distance curves Hierarchical assemblies Non-covalent functionalization Polymer nanocomposite Scanning electron microscopy image Surface deformation Tailored properties Carbon nanotubes
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_19448244_v9_n1_p930_Garate
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_19448244_v9_n1_p930_Garate
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spelling	todo:paper_19448244_v9_n1_p930_Garate2023-10-03T16:37:03Z High-energy dissipation performance in epoxy coatings by the synergistic effect of carbon nanotube/block copolymer conjugates Garate, H. Bianchi, M. Pietrasanta, L.I. Goyanes, S. D'Accorso, N.B. Block copolymer (BCP) Carbon nanotubes (CNT) Energy dissipation Epoxy coatings Nanocomposites Wear resistance Atomic force microscopy Block copolymers Coatings Elastic moduli Energy dissipation Epoxy resins Nanocomposites Nanotubes Plastic coatings Scanning electron microscopy Styrene Wear resistance Yarn Epoxy coatings Force-distance curves Hierarchical assemblies Non-covalent functionalization Polymer nanocomposite Scanning electron microscopy image Surface deformation Tailored properties Carbon nanotubes Hierarchical assembly of hard/soft nanoparticles holds great potential as reinforcements for polymer nanocomposites with tailored properties. Here, we present a facile strategy to integrate polystyrene-grafted carbon nanotubes (PSgCNT) (0.05-0.3 wt %) and poly(styrene-b- [isoprene-ran-epoxyisoprene]-b-styrene) block copolymer (10 wt %) into epoxy coatings using an ultrasound-assisted noncovalent functionalization process. The method leads to cured nanocomposites with core-shell block copolymer (BCP) nanodomains which are associated with carbon nanotubes (CNT) giving rise to CNT-BCP hybrid structures. Nanocomposite energy dissipation and reduced Young's Modulus (E∗) is determined from force-distance curves by atomic force microscopy operating in the PeakForce QNM imaging mode and compared to thermosets modified with BCP and purified carbon nanotubes (pCNT). Remarkably, nanocomposites bearing PSgCNT-BCP conjugates display an increase in energy dissipation of up to 7.1-fold with respect to neat epoxy and 53% more than materials prepared with pCNT and BCP at the same CNT load (0.3 wt %), while reduced Young's Modulus shows no significant change with CNT type and increases up to 25% compared to neat epoxy E∗ at a CNT load of 0.3 wt %. The energy dissipation performance of nanocomposites is also reflected by the lower wear coefficients of materials with PSgCNT and BCP compared to those with pCNT and BCP, as determined by abrasion tests. Furthermore, scanning electron microscopy (SEM) images taken on wear surfaces show that materials incorporating PSgCNT and BCP exhibit much more surface deformation under shear forces in agreement with their higher ability to dissipate more energy before particle release. We propose that the synergistic effect observed in energy dissipation arises from hierarchical assembly of PSgCNT and BCP within the epoxy matrix and provides clues that the CNT-BCP interface has a significant role in the mechanisms of energy dissipation of epoxy coating modified by CNT-BCP conjugates. These findings provide a means to design epoxy-based coatings with high-energy dissipation performance. © 2016 American Chemical Society. Fil:Goyanes, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:D'Accorso, N.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_19448244_v9_n1_p930_Garate
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Block copolymer (BCP) Carbon nanotubes (CNT) Energy dissipation Epoxy coatings Nanocomposites Wear resistance Atomic force microscopy Block copolymers Coatings Elastic moduli Energy dissipation Epoxy resins Nanocomposites Nanotubes Plastic coatings Scanning electron microscopy Styrene Wear resistance Yarn Epoxy coatings Force-distance curves Hierarchical assemblies Non-covalent functionalization Polymer nanocomposite Scanning electron microscopy image Surface deformation Tailored properties Carbon nanotubes
spellingShingle	Block copolymer (BCP) Carbon nanotubes (CNT) Energy dissipation Epoxy coatings Nanocomposites Wear resistance Atomic force microscopy Block copolymers Coatings Elastic moduli Energy dissipation Epoxy resins Nanocomposites Nanotubes Plastic coatings Scanning electron microscopy Styrene Wear resistance Yarn Epoxy coatings Force-distance curves Hierarchical assemblies Non-covalent functionalization Polymer nanocomposite Scanning electron microscopy image Surface deformation Tailored properties Carbon nanotubes Garate, H. Bianchi, M. Pietrasanta, L.I. Goyanes, S. D'Accorso, N.B. High-energy dissipation performance in epoxy coatings by the synergistic effect of carbon nanotube/block copolymer conjugates
topic_facet	Block copolymer (BCP) Carbon nanotubes (CNT) Energy dissipation Epoxy coatings Nanocomposites Wear resistance Atomic force microscopy Block copolymers Coatings Elastic moduli Energy dissipation Epoxy resins Nanocomposites Nanotubes Plastic coatings Scanning electron microscopy Styrene Wear resistance Yarn Epoxy coatings Force-distance curves Hierarchical assemblies Non-covalent functionalization Polymer nanocomposite Scanning electron microscopy image Surface deformation Tailored properties Carbon nanotubes
description	Hierarchical assembly of hard/soft nanoparticles holds great potential as reinforcements for polymer nanocomposites with tailored properties. Here, we present a facile strategy to integrate polystyrene-grafted carbon nanotubes (PSgCNT) (0.05-0.3 wt %) and poly(styrene-b- [isoprene-ran-epoxyisoprene]-b-styrene) block copolymer (10 wt %) into epoxy coatings using an ultrasound-assisted noncovalent functionalization process. The method leads to cured nanocomposites with core-shell block copolymer (BCP) nanodomains which are associated with carbon nanotubes (CNT) giving rise to CNT-BCP hybrid structures. Nanocomposite energy dissipation and reduced Young's Modulus (E∗) is determined from force-distance curves by atomic force microscopy operating in the PeakForce QNM imaging mode and compared to thermosets modified with BCP and purified carbon nanotubes (pCNT). Remarkably, nanocomposites bearing PSgCNT-BCP conjugates display an increase in energy dissipation of up to 7.1-fold with respect to neat epoxy and 53% more than materials prepared with pCNT and BCP at the same CNT load (0.3 wt %), while reduced Young's Modulus shows no significant change with CNT type and increases up to 25% compared to neat epoxy E∗ at a CNT load of 0.3 wt %. The energy dissipation performance of nanocomposites is also reflected by the lower wear coefficients of materials with PSgCNT and BCP compared to those with pCNT and BCP, as determined by abrasion tests. Furthermore, scanning electron microscopy (SEM) images taken on wear surfaces show that materials incorporating PSgCNT and BCP exhibit much more surface deformation under shear forces in agreement with their higher ability to dissipate more energy before particle release. We propose that the synergistic effect observed in energy dissipation arises from hierarchical assembly of PSgCNT and BCP within the epoxy matrix and provides clues that the CNT-BCP interface has a significant role in the mechanisms of energy dissipation of epoxy coating modified by CNT-BCP conjugates. These findings provide a means to design epoxy-based coatings with high-energy dissipation performance. © 2016 American Chemical Society.
format	JOUR
author	Garate, H. Bianchi, M. Pietrasanta, L.I. Goyanes, S. D'Accorso, N.B.
author_facet	Garate, H. Bianchi, M. Pietrasanta, L.I. Goyanes, S. D'Accorso, N.B.
author_sort	Garate, H.
title	High-energy dissipation performance in epoxy coatings by the synergistic effect of carbon nanotube/block copolymer conjugates
title_short	High-energy dissipation performance in epoxy coatings by the synergistic effect of carbon nanotube/block copolymer conjugates
title_full	High-energy dissipation performance in epoxy coatings by the synergistic effect of carbon nanotube/block copolymer conjugates
title_fullStr	High-energy dissipation performance in epoxy coatings by the synergistic effect of carbon nanotube/block copolymer conjugates
title_full_unstemmed	High-energy dissipation performance in epoxy coatings by the synergistic effect of carbon nanotube/block copolymer conjugates
title_sort	high-energy dissipation performance in epoxy coatings by the synergistic effect of carbon nanotube/block copolymer conjugates
url	http://hdl.handle.net/20.500.12110/paper_19448244_v9_n1_p930_Garate
work_keys_str_mv	AT garateh highenergydissipationperformanceinepoxycoatingsbythesynergisticeffectofcarbonnanotubeblockcopolymerconjugates AT bianchim highenergydissipationperformanceinepoxycoatingsbythesynergisticeffectofcarbonnanotubeblockcopolymerconjugates AT pietrasantali highenergydissipationperformanceinepoxycoatingsbythesynergisticeffectofcarbonnanotubeblockcopolymerconjugates AT goyaness highenergydissipationperformanceinepoxycoatingsbythesynergisticeffectofcarbonnanotubeblockcopolymerconjugates AT daccorsonb highenergydissipationperformanceinepoxycoatingsbythesynergisticeffectofcarbonnanotubeblockcopolymerconjugates
_version_	1807315420541091840

High-energy dissipation performance in epoxy coatings by the synergistic effect of carbon nanotube/block copolymer conjugates

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