Deswelling behaviour of ionic microgel particles from low to ultra-high densities

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Deswelling behaviour of ionic microgel particles from low to ultra-high densities. / Nöjd, Sofi; Holmqvist, Peter; Boon, Niels; Obiols-Rabasa, Marc; Mohanty, Priti S.; Schweins, Ralf; Schurtenberger, Peter.

I: Soft Matter, Vol. 14, Nr. 20, 01.01.2018, s. 4150-4159.

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

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Nöjd, Sofi ; Holmqvist, Peter ; Boon, Niels ; Obiols-Rabasa, Marc ; Mohanty, Priti S. ; Schweins, Ralf ; Schurtenberger, Peter. / Deswelling behaviour of ionic microgel particles from low to ultra-high densities. I: Soft Matter. 2018 ; Vol. 14, Nr. 20. s. 4150-4159.

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TY - JOUR

T1 - Deswelling behaviour of ionic microgel particles from low to ultra-high densities

AU - Nöjd, Sofi

AU - Holmqvist, Peter

AU - Boon, Niels

AU - Obiols-Rabasa, Marc

AU - Mohanty, Priti S.

AU - Schweins, Ralf

AU - Schurtenberger, Peter

PY - 2018/1/1

Y1 - 2018/1/1

N2 - The swelling of ionic microgel particles is investigated at a wide range of concentrations using a combination of light, X-ray and neutron scattering techniques. We employ a zero-average contrast approach for small-angle neutron scattering experiments, which enables a direct determination of the form factor at high concentrations. The observed particle size initially decreases strongly with the particle concentration in the dilute regime but approaches a constant value at intermediate concentrations. This is followed by a further deswelling at high concentrations above particle overlap. Theory and experiments point at a pivotal contribution of dangling polymer ends to the strong variation in size of ionic microgels, which presents itself mainly through the hydrodynamics properties of the system.

AB - The swelling of ionic microgel particles is investigated at a wide range of concentrations using a combination of light, X-ray and neutron scattering techniques. We employ a zero-average contrast approach for small-angle neutron scattering experiments, which enables a direct determination of the form factor at high concentrations. The observed particle size initially decreases strongly with the particle concentration in the dilute regime but approaches a constant value at intermediate concentrations. This is followed by a further deswelling at high concentrations above particle overlap. Theory and experiments point at a pivotal contribution of dangling polymer ends to the strong variation in size of ionic microgels, which presents itself mainly through the hydrodynamics properties of the system.

UR - http://www.scopus.com/inward/record.url?scp=85047491901&partnerID=8YFLogxK

U2 - 10.1039/c8sm00390d

DO - 10.1039/c8sm00390d

M3 - Article

VL - 14

SP - 4150

EP - 4159

JO - Soft Matter

T2 - Soft Matter

JF - Soft Matter

SN - 1744-6848

IS - 20

ER -