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@INPROCEEDINGS{Brito:874677,
      author       = {Brito, Mariano},
      title        = {{D}eswelling effect on structural and dynamic properties of
                      ionic microgel suspensions},
      reportid     = {FZJ-2020-01593},
      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 theoretically study
                      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
                      Poisson-Boltzmann cell model [2], and a multiparticle-based
                      thermodynamic perturbation method [3]. In combination with
                      an effective interaction potential for spherical ionic
                      microgels [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
                      low- and high-frequency viscosities. As a consequence of the
                      concentration-dependent deswelling, we show how the
                      collective diffusion is enhanced while the viscosity is
                      lowered in suspensions of ionic microgels.References[1] M.
                      Brito, 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).},
      organization  = {Seminar in Physics Department, North
                       Dakota State University, Fargo, ND
                       (USA)},
      subtyp        = {Invited},
      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)31},
      url          = {https://juser.fz-juelich.de/record/874677},
}