Swelling of micro-hydrogels with a crosslinker gradient
(2017) In Physical Chemistry Chemical Physics 19(35). p.23740-23746- Abstract
A heterogeneous distribution of crosslinker in micro-hydrogels (microgels) results in a non-uniform polymer density inside the particles. Identifying the morphology of the hydrogel backbone enables a bottom-up approach towards the structural and rheological properties of microgel systems. On a local level we use a Flory-Rehner inspired model that focuses on highly swollen networks, characterized by a Poisson's ratio of 1/4. Our ab initio calculations take account for the nonuniform distribution of crosslinker species during the synthesis of poly(N-isopropylacylamide) (PNIPAM) microgels, yet the method is also applicable to other microgel architectures. We recover a single-particle density profile that is in close agreement with SAXS... (More)
A heterogeneous distribution of crosslinker in micro-hydrogels (microgels) results in a non-uniform polymer density inside the particles. Identifying the morphology of the hydrogel backbone enables a bottom-up approach towards the structural and rheological properties of microgel systems. On a local level we use a Flory-Rehner inspired model that focuses on highly swollen networks, characterized by a Poisson's ratio of 1/4. Our ab initio calculations take account for the nonuniform distribution of crosslinker species during the synthesis of poly(N-isopropylacylamide) (PNIPAM) microgels, yet the method is also applicable to other microgel architectures. We recover a single-particle density profile that is in close agreement with SAXS data. Comparison with experimental data confirms that the surface of the cross-linked particle is decorated with dangling polymers ends of considerable size.
(Less)
- author
- Boon, Niels LU and Schurtenberger, Peter LU
- organization
- publishing date
- 2017
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Chemistry Chemical Physics
- volume
- 19
- issue
- 35
- pages
- 7 pages
- publisher
- Royal Society of Chemistry
- external identifiers
-
- pmid:28607971
- wos:000410585900016
- scopus:85029444447
- ISSN
- 1463-9076
- DOI
- 10.1039/c7cp02434g
- language
- English
- LU publication?
- yes
- id
- 8b943402-9da6-408f-a05d-6a4539a7fa4e
- date added to LUP
- 2017-10-04 10:23:52
- date last changed
- 2024-08-19 06:00:19
@article{8b943402-9da6-408f-a05d-6a4539a7fa4e, abstract = {{<p>A heterogeneous distribution of crosslinker in micro-hydrogels (microgels) results in a non-uniform polymer density inside the particles. Identifying the morphology of the hydrogel backbone enables a bottom-up approach towards the structural and rheological properties of microgel systems. On a local level we use a Flory-Rehner inspired model that focuses on highly swollen networks, characterized by a Poisson's ratio of 1/4. Our ab initio calculations take account for the nonuniform distribution of crosslinker species during the synthesis of poly(N-isopropylacylamide) (PNIPAM) microgels, yet the method is also applicable to other microgel architectures. We recover a single-particle density profile that is in close agreement with SAXS data. Comparison with experimental data confirms that the surface of the cross-linked particle is decorated with dangling polymers ends of considerable size.</p>}}, author = {{Boon, Niels and Schurtenberger, Peter}}, issn = {{1463-9076}}, language = {{eng}}, number = {{35}}, pages = {{23740--23746}}, publisher = {{Royal Society of Chemistry}}, series = {{Physical Chemistry Chemical Physics}}, title = {{Swelling of micro-hydrogels with a crosslinker gradient}}, url = {{http://dx.doi.org/10.1039/c7cp02434g}}, doi = {{10.1039/c7cp02434g}}, volume = {{19}}, year = {{2017}}, }