Superamphiphobic coatings based on liquid-core microcapsules with engineered capsule walls and functionality

Abstract Microcapsules with specific functional properties, related to the capsule wall and core, are highly desired in a number of applications. In this study, hybrid cellulose microcapsules (1.2 ± 0.4 µm in diameter) were prepared by nanoengineering the outer walls of precursor capsules. Depending...

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Autores principales:	Malin Nordenström, Anastasia V. Riazanova, Mikael Järn, Thomas Paulraj, Charlotta Turner, Valter Ström, Richard T. Olsson, Anna J. Svagan
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7182b1dc809c47818317bcf25ddb3b83
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spelling	oai:doaj.org-article:7182b1dc809c47818317bcf25ddb3b832021-12-02T15:07:58ZSuperamphiphobic coatings based on liquid-core microcapsules with engineered capsule walls and functionality10.1038/s41598-018-21957-y2045-2322https://doaj.org/article/7182b1dc809c47818317bcf25ddb3b832018-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-21957-yhttps://doaj.org/toc/2045-2322Abstract Microcapsules with specific functional properties, related to the capsule wall and core, are highly desired in a number of applications. In this study, hybrid cellulose microcapsules (1.2 ± 0.4 µm in diameter) were prepared by nanoengineering the outer walls of precursor capsules. Depending on the preparation route, capsules with different surface roughness (raspberry or broccoli-like), and thereby different wetting properties, could be obtained. The tunable surface roughness was achieved as a result of the chemical and structural properties of the outer wall of a precursor capsule, which combined with a new processing route allowed in-situ formation of silica nanoparticles (30–40 nm or 70 nm in diameter). By coating glass slides with “broccoli-like” microcapsules (30–40 nm silica nanoparticles), static contact angles above 150° and roll-off angles below 6° were obtained for both water and low surface-tension oil (hexadecane), rendering the substrate superamphiphobic. As a comparison, coatings from raspberry-like capsules were only strongly oleophobic and hydrophobic. The liquid-core of the capsules opens great opportunities to incorporate different functionalities and here hydrophobic superparamagnetic nanoparticles (SPIONs) were encapsulated. As a result, magnetic broccoli-like microcapsules formed an excellent superamphiphobic coating-layer on a curved geometry by simply applying an external magnetic field.Malin NordenströmAnastasia V. RiazanovaMikael JärnThomas PaulrajCharlotta TurnerValter StrömRichard T. OlssonAnna J. SvaganNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Malin Nordenström Anastasia V. Riazanova Mikael Järn Thomas Paulraj Charlotta Turner Valter Ström Richard T. Olsson Anna J. Svagan Superamphiphobic coatings based on liquid-core microcapsules with engineered capsule walls and functionality
description	Abstract Microcapsules with specific functional properties, related to the capsule wall and core, are highly desired in a number of applications. In this study, hybrid cellulose microcapsules (1.2 ± 0.4 µm in diameter) were prepared by nanoengineering the outer walls of precursor capsules. Depending on the preparation route, capsules with different surface roughness (raspberry or broccoli-like), and thereby different wetting properties, could be obtained. The tunable surface roughness was achieved as a result of the chemical and structural properties of the outer wall of a precursor capsule, which combined with a new processing route allowed in-situ formation of silica nanoparticles (30–40 nm or 70 nm in diameter). By coating glass slides with “broccoli-like” microcapsules (30–40 nm silica nanoparticles), static contact angles above 150° and roll-off angles below 6° were obtained for both water and low surface-tension oil (hexadecane), rendering the substrate superamphiphobic. As a comparison, coatings from raspberry-like capsules were only strongly oleophobic and hydrophobic. The liquid-core of the capsules opens great opportunities to incorporate different functionalities and here hydrophobic superparamagnetic nanoparticles (SPIONs) were encapsulated. As a result, magnetic broccoli-like microcapsules formed an excellent superamphiphobic coating-layer on a curved geometry by simply applying an external magnetic field.
format	article
author	Malin Nordenström Anastasia V. Riazanova Mikael Järn Thomas Paulraj Charlotta Turner Valter Ström Richard T. Olsson Anna J. Svagan
author_facet	Malin Nordenström Anastasia V. Riazanova Mikael Järn Thomas Paulraj Charlotta Turner Valter Ström Richard T. Olsson Anna J. Svagan
author_sort	Malin Nordenström
title	Superamphiphobic coatings based on liquid-core microcapsules with engineered capsule walls and functionality
title_short	Superamphiphobic coatings based on liquid-core microcapsules with engineered capsule walls and functionality
title_full	Superamphiphobic coatings based on liquid-core microcapsules with engineered capsule walls and functionality
title_fullStr	Superamphiphobic coatings based on liquid-core microcapsules with engineered capsule walls and functionality
title_full_unstemmed	Superamphiphobic coatings based on liquid-core microcapsules with engineered capsule walls and functionality
title_sort	superamphiphobic coatings based on liquid-core microcapsules with engineered capsule walls and functionality
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/7182b1dc809c47818317bcf25ddb3b83
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Superamphiphobic coatings based on liquid-core microcapsules with engineered capsule walls and functionality

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