% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Talley:864764,
      author       = {Talley, Samantha J. and Vivod, Stephanie L. and Nguyen,
                      Baochau A. and Meador, Mary Ann B. and Radulescu, Aurel and
                      Moore, Robert B.},
      title        = {{H}ierarchical {M}orphology of {P}oly(ether ether ketone)
                      {A}erogels},
      journal      = {ACS applied materials $\&$ interfaces},
      volume       = {11},
      number       = {34},
      issn         = {1944-8252},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {FZJ-2019-04431},
      pages        = {31508 - 31519},
      year         = {2019},
      abstract     = {The phase diagram for the thermoreversible gelation of
                      poly(ether ether ketone) (PEEK) in 4-chlorophenol (4CP) was
                      constructed over broad temperature and concentration ranges,
                      revealing that PEEK is capable of dissolving and forming
                      gels in both 4CP and dichloroacetic acid (DCA) up to a
                      concentration of 25 wt $\%.$ Highly porous aerogels of PEEK
                      were prepared through simple solvent exchange followed by
                      one of two drying methods of solvent removal from the wet
                      gel: freeze-drying or supercritical CO2 fluid extraction
                      (SC-drying). The field-emission scanning electron microscopy
                      analysis showed that gelation of PEEK in 4CP, followed by
                      SC-drying, produced aerogels with well-defined lamellar
                      aggregates as compared to less ordered aggregates formed
                      from DCA. Mechanical properties (in compression) were shown
                      to improve with increasing density, resulting in equivalent
                      compressive moduli at comparable density, regardless of the
                      preparation method (gelation solvent selection,
                      concentration variation, or drying method). Nitrogen
                      adsorption–desorption isotherms indicate that PEEK
                      aerogels are comprised of mesopores (2–50 nm diameter
                      pores) formed from stacked crystalline lamella. PEEK
                      aerogels prepared using SC-drying exhibit higher
                      Brunauer–Emmett–Teller surface areas than freeze-dried
                      aerogels of comparable density. The ultra-small-angle X-ray
                      scattering/small-angle X-ray scattering (SAXS)/wide-angle
                      X-ray scattering analysis revealed a hierarchical morphology
                      of the PEEK aerogels with structural features from PEEK
                      crystallites to agglomerates of stacked lamella that spanned
                      a wide range of length scales. SANS contrast-matching
                      confirmed that the morphological origin of the principle
                      scattering feature in PEEK aerogels is stacked crystalline
                      lamella. Nitrogen sorption measurements of porosity and the
                      specific surface area of the PEEK aerogels were correlated
                      with the SAXS analysis to reveal a remarkably high surface
                      area attributed to the platelet-like, lamellar morphology.
                      Contact angle and contact angle hysteresis (CAH) revealed
                      that low-density PEEK aerogels (ρ < 0.15 g/cm3) have water
                      contact angles above the superhydrophobicity cutoff angle
                      (>150°) and a very low CAH near 1°.},
      cin          = {JCNS-FRM-II / JCNS-1 / MLZ},
      ddc          = {600},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106 / 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},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:31379150},
      UT           = {WOS:000484073400110},
      doi          = {10.1021/acsami.9b09699},
      url          = {https://juser.fz-juelich.de/record/864764},
}