Using Patchy Particles to Prevent Local Rearrangements in Models of Non-equilibrium Colloidal Gels
Immink, Jasper N. LU ; Maris, J. J.Erik ; Schurtenberger, Peter LU
and Stenhammar, Joakim
LU
(2020)
In Langmuir
36(1).
p.419-425
- Abstract
Simple models based on isotropic interparticle attractions often fail to capture experimentally observed structures of colloidal gels formed through spinodal decomposition and subsequent arrest: the resulting gels are typically denser and less branched than their experimental counterparts. Here, we simulate gels formed from soft particles with directional attractions ("patchy particles"), designed to inhibit lateral particle rearrangement after aggregation. We directly compare simulated structures with experimental colloidal gels made using soft attractive microgel particles, by employing a "skeletonization" method that reconstructs the three-dimensional backbone from experiment or simulation. We show that including directional... (More)
Simple models based on isotropic interparticle attractions often fail to capture experimentally observed structures of colloidal gels formed through spinodal decomposition and subsequent arrest: the resulting gels are typically denser and less branched than their experimental counterparts. Here, we simulate gels formed from soft particles with directional attractions ("patchy particles"), designed to inhibit lateral particle rearrangement after aggregation. We directly compare simulated structures with experimental colloidal gels made using soft attractive microgel particles, by employing a "skeletonization" method that reconstructs the three-dimensional backbone from experiment or simulation. We show that including directional attractions with sufficient valency leads to strongly branched structures compared to isotropic models. Furthermore, combining isotropic and directional attractions provides additional control over aggregation kinetics and gel structure. Our results show that the inhibition of lateral particle rearrangements strongly affects the gel topology and is an important effect to consider in computational models of colloidal gels.
(Less)
- author
- Immink, Jasper N.
LU
; Maris, J. J.Erik
; Schurtenberger, Peter
LU
and Stenhammar, Joakim
LU
- organization
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Langmuir
- volume
- 36
- issue
- 1
- pages
- 7 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- pmid:31763852
- scopus:85077799486
- ISSN
- 0743-7463
- DOI
- 10.1021/acs.langmuir.9b02675
- language
- English
- LU publication?
- yes
- id
- 377b8207-e097-4b75-a428-6f79375b1cea
- date added to LUP
- 2020-01-27 08:41:54
- date last changed
- 2024-04-17 02:47:50
@article{377b8207-e097-4b75-a428-6f79375b1cea,
abstract = {{<p>Simple models based on isotropic interparticle attractions often fail to capture experimentally observed structures of colloidal gels formed through spinodal decomposition and subsequent arrest: the resulting gels are typically denser and less branched than their experimental counterparts. Here, we simulate gels formed from soft particles with directional attractions ("patchy particles"), designed to inhibit lateral particle rearrangement after aggregation. We directly compare simulated structures with experimental colloidal gels made using soft attractive microgel particles, by employing a "skeletonization" method that reconstructs the three-dimensional backbone from experiment or simulation. We show that including directional attractions with sufficient valency leads to strongly branched structures compared to isotropic models. Furthermore, combining isotropic and directional attractions provides additional control over aggregation kinetics and gel structure. Our results show that the inhibition of lateral particle rearrangements strongly affects the gel topology and is an important effect to consider in computational models of colloidal gels.</p>}},
author = {{Immink, Jasper N. and Maris, J. J.Erik and Schurtenberger, Peter and Stenhammar, Joakim}},
issn = {{0743-7463}},
language = {{eng}},
number = {{1}},
pages = {{419--425}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Langmuir}},
title = {{Using Patchy Particles to Prevent Local Rearrangements in Models of Non-equilibrium Colloidal Gels}},
url = {{http://dx.doi.org/10.1021/acs.langmuir.9b02675}},
doi = {{10.1021/acs.langmuir.9b02675}},
volume = {{36}},
year = {{2020}},
}