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@INPROCEEDINGS{Brito:874678,
      author       = {Brito, Mariano},
      title        = {{D}eswelling effects on transport properties of ionic
                      microgel suspensions},
      reportid     = {FZJ-2020-01594},
      year         = {2019},
      abstract     = {Microgels are solvent-containing, cross-linked polymer
                      networks of colloidal size that can reversibly swell or
                      deswell in response to external stimuli. Ionic microgels, in
                      particular, are highly sensitive to changes in environmental
                      conditions such as temperature, solvent quality, polymer
                      cross-linking, suspension ionic strength and particle
                      concentration, which allows for controlling their size and
                      effective interaction. In this work, we study theoretically
                      the effects of concentration-dependent deswelling of
                      weakly-crosslinked ionic microgels on dynamic and structural
                      suspension properties [1]. We use and compare two different
                      theoretical approaches to calculate the equilibrium microgel
                      size, namely the Denton-Tang method based on a
                      Poisson-Boltzmann cell model [2], and a multi-colloid center
                      based thermodynamic perturbation method [3]. In combination
                      with an effective interaction potential for spherical ionic
                      microgels derived by Denton [4], we compute static pair
                      correlation functions and structure factors. These are used
                      as input in our calculations of dynamic suspension
                      properties including the hydrodynamic function, collective
                      diffusion coefficient, and high-frequency viscosity. As a
                      consequence of the concentration-dependent deswelling, the
                      collective diffusion of ionic microgels is enhanced while
                      the suspension viscosity is lowered. We finally discuss
                      charge-renormalization effects in ionic
                      microgels.References[1] M. Brito, J. Riest, A. R. Denton and
                      G. Nägele, to be submitted.[2] A. R. Denton and Qiyun Tang,
                      J. Chem. Phys. 145, 164901 (2016).[3] T. J. Weyer and A. R.
                      Denton, Soft Matter 14, 4530 (2018).[4] A. R. Denton, Phys.
                      Rev. E 67, 011804 (2003).},
      month         = {Jun},
      date          = {2019-06-03},
      organization  = {International Soft Matter Conference
                       2019, Edinburgh (UK), 3 Jun 2019 - 7
                       Jun 2019},
      subtyp        = {Other},
      cin          = {IBI-4},
      cid          = {I:(DE-Juel1)IBI-4-20200312},
      pnm          = {551 - Functional Macromolecules and Complexes (POF3-551)},
      pid          = {G:(DE-HGF)POF3-551},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://juser.fz-juelich.de/record/874678},
}