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@ARTICLE{Liu:843618,
      author       = {Liu, Yi and Li, Feng and van Casteren, IIse and Tennebroe,
                      Ronald and Lang, Peter R.},
      title        = {{S}elf-, co-organisation behaviour and encapsulation
                      efficiency of waterborne polyurethane pre–polymers},
      journal      = {Colloids and surfaces / A},
      volume       = {544},
      issn         = {0927-7757},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2018-01200},
      pages        = {165-171},
      year         = {2018},
      abstract     = {Polyurethane-prepolymers are the precursor for waterborne
                      polyurethane coating applications. The physical–chemical
                      behavior of the pre-polymers are worth thorough
                      investigation, since they will largely influence the final
                      properties of coating products [1–3]. In this paper, we
                      experimentally studied the self-, co-organization
                      characteristics and encapsulation efficiency of a
                      polyurethane pre-polymer in aqueous electrolyte environment,
                      by means of light scattering and small angle X-ray
                      scattering. Due to the amphiphilic nature, pre-polymers are
                      expected to form micelles in water. Systematic studies were
                      conducted on dispersions at different pre-polymer
                      concentrations and salt concentrations. Our experiments show
                      that the micelles have a radius of about 10 nm and are
                      stable over a broad range of salt concentrations; only at
                      high salt, 100 mM NaCl, we observe the onset of colloidal
                      instability. Moreover, we find that the amphiphilic
                      pre-polymers are able to encapsulate hydrophobic
                      counterparts, forming particles with radii of about
                      130 nm. The threshold ratio of hydrophilic over
                      hydrophobic pre-polymers to form stable dispersion is found
                      to be 5:1.},
      cin          = {ICS-3},
      ddc          = {540},
      cid          = {I:(DE-Juel1)ICS-3-20110106},
      pnm          = {551 - Functional Macromolecules and Complexes (POF3-551) /
                      SOMATAI - Soft Matter at Aqueous Interfaces (316866)},
      pid          = {G:(DE-HGF)POF3-551 / G:(EU-Grant)316866},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000428257100021},
      doi          = {10.1016/j.colsurfa.2018.01.052},
      url          = {https://juser.fz-juelich.de/record/843618},
}