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Structural characterization of nanoparticles formed by fluorinated poly(2-oxazoline)-based polyphiles

(2018) EUROPEAN POLYMER JOURNAL. 99. p.518-527
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Abstract
We report on the self-assembly behavior of poly(2-methyl-2-oxazoline) block poly(2-octyl-2-oxazoline) comprising different terminal perfluoroalkyl fragments in aqueous solutions. As reported previously [Kaberov et al. (2017)] such polyphiles can form a plethora of nanostructures depending of the composition and on the way of preparation. Here we report, for the first time, detailed information on the internal structure of the nanoparticles resulting from the self-assembly of these copolymers. Small-angle neutron and X-ray scattering (SANS/SAXS) experiments unambiguously prove the existence of polymersomes, wormlike micelles and their aggregates in aqueous solution. It is shown that increasing content of fluorine in the poly(2-oxazoline) copolymers results in a morphological transition from bilayered or multi-layered vesicles to wormlike micelles for solutions prepared by direct dissolution. In contrast, nanoparticles prepared by dialysis of a polymer solution in a non-selective organic solvent against water are characterized by SAXS method. The internal structure of the nanoparticles could be assessed by fitting of the scattering data, revealing complex core-double shell architecture of spherical symmetry. Additionally, long range ordering is identified for all studied nanoparticles due to the crystallization of the poly(2-octyl-2-oxazoline) segments inside the nanoparticles.
Keywords
SIDE-CHAIN POLYESTERS, MULTICOMPARTMENT MICELLES, DELIVERY-SYSTEMS, COPOLYMERS, BLOCK, FLUOROCARBON, SCATTERING, BEHAVIOR, ORGANIZATION, LIPOSOMES, Poly(2-oxazolines), Fluorinated polymers, Small-angle X-ray scattering, Small-angle neutron scattering, Self-assembly

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Citation

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Chicago
Riabtseva, Anna, Leonid I Kaberov, Laurence Noirez, Vasyl Ryukhtin, Corinne Nardin, Bart Verbraeken, Richard Hoogenboom, Petr Stepanek, and Sergey K Filippov. 2018. “Structural Characterization of Nanoparticles Formed by Fluorinated Poly(2-oxazoline)-based Polyphiles.” European Polymer Journal 99: 518–527.
APA
Riabtseva, A., Kaberov, L. I., Noirez, L., Ryukhtin, V., Nardin, C., Verbraeken, B., Hoogenboom, R., et al. (2018). Structural characterization of nanoparticles formed by fluorinated poly(2-oxazoline)-based polyphiles. EUROPEAN POLYMER JOURNAL, 99, 518–527.
Vancouver
1.
Riabtseva A, Kaberov LI, Noirez L, Ryukhtin V, Nardin C, Verbraeken B, et al. Structural characterization of nanoparticles formed by fluorinated poly(2-oxazoline)-based polyphiles. EUROPEAN POLYMER JOURNAL. 2018;99:518–27.
MLA
Riabtseva, Anna, Leonid I Kaberov, Laurence Noirez, et al. “Structural Characterization of Nanoparticles Formed by Fluorinated Poly(2-oxazoline)-based Polyphiles.” EUROPEAN POLYMER JOURNAL 99 (2018): 518–527. Print.
@article{8561215,
  abstract     = {We report on the self-assembly behavior of poly(2-methyl-2-oxazoline) block poly(2-octyl-2-oxazoline) comprising different terminal perfluoroalkyl fragments in aqueous solutions. As reported previously [Kaberov et al. (2017)] such polyphiles can form a plethora of nanostructures depending of the composition and on the way of preparation. Here we report, for the first time, detailed information on the internal structure of the nanoparticles resulting from the self-assembly of these copolymers. Small-angle neutron and X-ray scattering (SANS/SAXS) experiments unambiguously prove the existence of polymersomes, wormlike micelles and their aggregates in aqueous solution. It is shown that increasing content of fluorine in the poly(2-oxazoline) copolymers results in a morphological transition from bilayered or multi-layered vesicles to wormlike micelles for solutions prepared by direct dissolution. 
In contrast, nanoparticles prepared by dialysis of a polymer solution in a non-selective organic solvent against water are characterized by SAXS method. The internal structure of the nanoparticles could be assessed by fitting of the scattering data, revealing complex core-double shell architecture of spherical symmetry. Additionally, long range ordering is identified for all studied nanoparticles due to the crystallization of the poly(2-octyl-2-oxazoline) segments inside the nanoparticles.},
  author       = {Riabtseva, Anna and Kaberov, Leonid I and Noirez, Laurence and Ryukhtin, Vasyl and Nardin, Corinne and Verbraeken, Bart and Hoogenboom, Richard and Stepanek, Petr and Filippov, Sergey K},
  issn         = {0014-3057},
  journal      = {EUROPEAN POLYMER JOURNAL},
  language     = {eng},
  pages        = {518--527},
  title        = {Structural characterization of nanoparticles formed by fluorinated poly(2-oxazoline)-based polyphiles},
  url          = {http://dx.doi.org/10.1016/j.eurpolymj.2018.01.007},
  volume       = {99},
  year         = {2018},
}

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