On the role of softness in ionic microgel interactions
Bergman, Maxime J. LU ; Nöjd, Sofi LU ; Mohanty, Priti S. LU ; Boon, Niels LU ; Immink, Jasper N. LU ; Maris, J. J.Erik ; Stenhammar, Joakim LU and Schurtenberger, Peter LU
(2021)
In Soft Matter
17(44).
p.10063-10072
- Abstract
Thermoresponsive microgels are a popular model system to study phase transitions in soft matter, because temperature directly controls their volume fraction. Ionic microgels are additionally pH-responsive and possess a rich phase diagram. Although effective interaction potentials between microgel particles have been proposed, these have never been fully tested, leading to a gap in our understanding of the link between single-particle and collective properties. To help resolve this gap, four sets of ionic microgels with varying crosslinker density were synthesised and characterised using light scattering techniques and confocal microscopy. The resultant structural and dynamical information was used to investigate how particle softness... (More)
Thermoresponsive microgels are a popular model system to study phase transitions in soft matter, because temperature directly controls their volume fraction. Ionic microgels are additionally pH-responsive and possess a rich phase diagram. Although effective interaction potentials between microgel particles have been proposed, these have never been fully tested, leading to a gap in our understanding of the link between single-particle and collective properties. To help resolve this gap, four sets of ionic microgels with varying crosslinker density were synthesised and characterised using light scattering techniques and confocal microscopy. The resultant structural and dynamical information was used to investigate how particle softness affects the phase behaviour of ionic microgels and to validate the proposed interaction potential. We find that the architecture of the microgel plays a marked role in its phase behaviour. Rather than the ionic charges, it is the dangling ends which drive phase transitions and interactions at low concentration. Comparison to theory underlines the need for a refined theoretical model which takes into consideration these close-contact interactions. This journal is
(Less)
- author
- Bergman, Maxime J.
LU
; Nöjd, Sofi
LU
; Mohanty, Priti S.
LU
; Boon, Niels
LU
; Immink, Jasper N.
LU
; Maris, J. J.Erik
; Stenhammar, Joakim
LU
and Schurtenberger, Peter
LU
- organization
- publishing date
- 2021-11-28
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Soft Matter
- volume
- 17
- issue
- 44
- pages
- 10 pages
- publisher
- Royal Society of Chemistry
- external identifiers
-
- pmid:34714903
- scopus:85119974607
- ISSN
- 1744-683X
- DOI
- 10.1039/d1sm01222c
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © The Royal Society of Chemistry.
- id
- e9e57cf6-5b1d-48fd-8433-53d244725107
- date added to LUP
- 2022-01-21 15:30:18
- date last changed
- 2024-06-16 00:16:29
@article{e9e57cf6-5b1d-48fd-8433-53d244725107,
abstract = {{<p>Thermoresponsive microgels are a popular model system to study phase transitions in soft matter, because temperature directly controls their volume fraction. Ionic microgels are additionally pH-responsive and possess a rich phase diagram. Although effective interaction potentials between microgel particles have been proposed, these have never been fully tested, leading to a gap in our understanding of the link between single-particle and collective properties. To help resolve this gap, four sets of ionic microgels with varying crosslinker density were synthesised and characterised using light scattering techniques and confocal microscopy. The resultant structural and dynamical information was used to investigate how particle softness affects the phase behaviour of ionic microgels and to validate the proposed interaction potential. We find that the architecture of the microgel plays a marked role in its phase behaviour. Rather than the ionic charges, it is the dangling ends which drive phase transitions and interactions at low concentration. Comparison to theory underlines the need for a refined theoretical model which takes into consideration these close-contact interactions. This journal is </p>}},
author = {{Bergman, Maxime J. and Nöjd, Sofi and Mohanty, Priti S. and Boon, Niels and Immink, Jasper N. and Maris, J. J.Erik and Stenhammar, Joakim and Schurtenberger, Peter}},
issn = {{1744-683X}},
language = {{eng}},
month = {{11}},
number = {{44}},
pages = {{10063--10072}},
publisher = {{Royal Society of Chemistry}},
series = {{Soft Matter}},
title = {{On the role of softness in ionic microgel interactions}},
url = {{http://dx.doi.org/10.1039/d1sm01222c}},
doi = {{10.1039/d1sm01222c}},
volume = {{17}},
year = {{2021}},
}