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@ARTICLE{Cattoz:185712,
      author       = {Cattoz, Beatrice and de Vos, Wiebe M. and Cosgrove, Terence
                      and Crossman, Martin and Appavou, Marie-Sousai and Prescott,
                      Stuart W.},
      title        = {{C}omplexation of polymeric stabilisers in solution and at
                      the silica nanoparticle interface},
      journal      = {Colloids and surfaces / A},
      volume       = {449},
      issn         = {0927-7757},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2014-07137},
      pages        = {57 - 64},
      year         = {2014},
      abstract     = {The weak polyelectrolyte sodium polyacrylate, NaPA, and the
                      neutral poly(vinyl pyrrolidone), PVP, were combined and the
                      effects of complexation both in solution and at the
                      nanoparticle interface were studied under basic pH
                      conditions. Using a combination of SANS and PCS, we
                      demonstrate that attractive inter-polymer interactions occur
                      between PVP and NaPA in solution (for polymers with
                      molecular weights equal to 40 K and 60 K respectively);
                      typically, no attractive interactions between PVP and NaPA
                      are reported above a critical pH of 4–5. Polymer
                      interactions in the bulk are observed between the larger
                      molecular weight polymers studied. The mass ratios of
                      polymer also affect the interactions in the bulk, indicating
                      that polymer interactions are influenced by the charges
                      present in the system. The addition of NaPA to a silica
                      dispersion with PVP previously adsorbed to the particles is
                      shown to led to polymer desorption and the destabilisation
                      of the system leading to particle aggregation or even
                      flocculation. SANS data show that the interparticle
                      potential changes from being repulsive with bare silica or
                      PVP-coated silica to attractive on addition of NaPA. The
                      molecular weight of PVP is seen to affect the amount of
                      polymer desorbed, whereas the molecular weight of NaPA had
                      an effect on the aggregation of particles.},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1 /
                      ICS-1},
      ddc          = {540},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)ICS-1-20110106},
      pnm          = {54G - JCNS (POF2-54G24)},
      pid          = {G:(DE-HGF)POF2-54G24},
      experiment   = {EXP:(DE-MLZ)KWS1-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000335202400007},
      doi          = {10.1016/j.colsurfa.2014.02.039},
      url          = {https://juser.fz-juelich.de/record/185712},
}