Superamphiphobic coatings based on liquid-core microcapsules with engineered capsule walls and functionality
Nordenström, Malin ; Riazanova, Anastasia V. ; Järn, Mikael ; Paulraj, Thomas ; Turner, Charlotta LU
; Ström, Valter
; Olsson, Richard T.
and Svagan, Anna J.
(2018)
In Scientific Reports
8(1).
- 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... (More)
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.
(Less)
- author
- Nordenström, Malin
; Riazanova, Anastasia V.
; Järn, Mikael
; Paulraj, Thomas
; Turner, Charlotta
LU
; Ström, Valter
; Olsson, Richard T.
and Svagan, Anna J.
- organization
- publishing date
- 2018-12-01
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Scientific Reports
- volume
- 8
- issue
- 1
- article number
- 3647
- publisher
- Nature Publishing Group
- external identifiers
-
- scopus:85042684065
- pmid:29483613
- ISSN
- 2045-2322
- DOI
- 10.1038/s41598-018-21957-y
- language
- English
- LU publication?
- yes
- id
- bbe1fda1-8e2a-4bb7-8953-f163d7a4a213
- date added to LUP
- 2018-03-15 09:45:38
- date last changed
- 2024-04-15 03:41:48
@article{bbe1fda1-8e2a-4bb7-8953-f163d7a4a213,
abstract = {{<p>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.</p>}},
author = {{Nordenström, Malin and Riazanova, Anastasia V. and Järn, Mikael and Paulraj, Thomas and Turner, Charlotta and Ström, Valter and Olsson, Richard T. and Svagan, Anna J.}},
issn = {{2045-2322}},
language = {{eng}},
month = {{12}},
number = {{1}},
publisher = {{Nature Publishing Group}},
series = {{Scientific Reports}},
title = {{Superamphiphobic coatings based on liquid-core microcapsules with engineered capsule walls and functionality}},
url = {{http://dx.doi.org/10.1038/s41598-018-21957-y}},
doi = {{10.1038/s41598-018-21957-y}},
volume = {{8}},
year = {{2018}},
}