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@ARTICLE{LeCoeur:878194,
      author       = {Le Coeur, C. and Lorthioir, C. and Feoktystov, A. and Wu,
                      Baohu and Volet, G. and Amiel, C.},
      title        = {{L}aponite/poly(2-methyl-2-oxazoline) hydrogels: interplay
                      between local structure and rheological behaviour},
      journal      = {Journal of colloid and interface science},
      volume       = {582},
      number       = {Part A},
      issn         = {0021-9797},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2020-02682},
      pages        = {149-158},
      year         = {2020},
      abstract     = {HypothesisDispersions of Laponite in water may form gels,
                      the rheological properties of which being possibly tuned by
                      the addition of polymer chains. Laponite-based hydrogels
                      with poly(ethylene oxide) (PEO) were the most widely
                      investigated systems and the PEO chains were then found to
                      reduce the elastic modulus.ExperimentsHere, hydrogels based
                      on Laponite and poly(2-methyl-2-oxazoline) (POXA) were
                      considered. The adsorption behavior and the local structures
                      within these nanocomposite gels were investigated by
                      small-angle neutron scattering and NMR. The same materials
                      were macroscopically characterized using rheology.FindingsAn
                      original evolution of the storage modulus G' with the POXA
                      concentration is evidenced compared to Laponite/PEO
                      hydrogels. At low POXA concentrations, a continuous
                      reduction of G' is observed upon increasing the polymer
                      content, as with PEO, due to the screening of electrostatic
                      interactions between the clay platelets. However, above a
                      critical value of the POXA concentration, G' increases with
                      the polymer content. This difference with PEO-based
                      hydrogels is correlated to the stronger affinity of POXA
                      chains for the clay surfaces, which results in the reduction
                      of the inhomogeneities for the Laponite disks within the
                      gels. Steric repulsions would then counterbalance the effect
                      of electrostatic repulsions and lead to the strengthening of
                      the POXA-based hydrogels.},
      cin          = {JCNS-FRM-II / JCNS-1 / JCNS-2 / MLZ},
      ddc          = {540},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)JCNS-2-20110106 /
                      I:(DE-588b)4597118-3},
      pnm          = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
                      Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)KWS2-20140101 / EXP:(DE-MLZ)KWS3-20140101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {32814221},
      UT           = {WOS:000590679200015},
      doi          = {10.1016/j.jcis.2020.07.068},
      url          = {https://juser.fz-juelich.de/record/878194},
}