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Effect of Polymer Architecture on the Phase Behavior and Structure of Polyelectrolyte/Microemulsion Complexes (PEMECs)
- Source :
- Macromolecules, Macromolecules, American Chemical Society, 2020, ⟨10.1021/acs.macromol.0c00236⟩, Macromolecules, American Chemical Society, 2020, 53, pp.4055-4067. ⟨10.1021/acs.macromol.0c00236⟩, Macromolecules, 2020, 53, pp.4055-4067. ⟨10.1021/acs.macromol.0c00236⟩
- Publication Year :
- 2020
- Publisher :
- HAL CCSD, 2020.
-
Abstract
- International audience; We studied polyelectrolyte/microemulsion complexes (PEMECs) formed by the biopolymer sodium hyaluronate (NaHA) and cationic oil-in-water (O/W) microemulsion droplets. Around equimolar charge conditions, a two-phase region with a liquid−liquid phase separation (coacervate formation) is observed, while mixed complexes are formed at polyelectrolyte excess. The largest complexes are found close to the phase boundary. The detailed structure of these complexes was determined by a combination of static and dynamic light scattering (SLS and DLS), small-angle neutron scattering (SANS), and cryo-transmission electron cryomicroscopy (cryo-TEM). Interestingly, these complexes formed with NaHA are much more elongated compared to previously studied complexes formed with sodium polyacrylate (NaPA). Similar observations were made for another polysaccharide, sodium carboxymethyl cellulose (NaCMC). Apparently, the persistence length of the complexes is largely proportional to the persistence length of the polyelectrolyte, which was determined by analyzing the SANS data with a specifically developed model. Accordingly, the size of the complexes formed with stiffer biopolyelectrolytes becomes much larger, increasing with the molecular weight (M w) of the polyelectrolyte. In summary, we conclude that the size and structure of the PEMECs can be controlled by the type of polyelectrolyte, mixing ratio, size of the microemulsion droplets, and M w of the polyelectrolyte. This means that the polyelectrolyte addition can be used as a key structuring element for the size and shape of such complexes.
- Subjects :
- Materials science
Polymers and Plastics
Sodium hyaluronate
Polymer architecture
02 engineering and technology
engineering.material
010402 general chemistry
01 natural sciences
Inorganic Chemistry
chemistry.chemical_compound
Phase (matter)
Materials Chemistry
[CHIM]Chemical Sciences
Microemulsion
[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat]
[PHYS]Physics [physics]
Organic Chemistry
Cationic polymerization
[CHIM.MATE]Chemical Sciences/Material chemistry
021001 nanoscience & nanotechnology
Polyelectrolyte
0104 chemical sciences
Chemical engineering
chemistry
engineering
Biopolymer
0210 nano-technology
[PHYS.COND.CM-SCM]Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft]
Subjects
Details
- Language :
- English
- ISSN :
- 00249297 and 15205835
- Database :
- OpenAIRE
- Journal :
- Macromolecules, Macromolecules, American Chemical Society, 2020, ⟨10.1021/acs.macromol.0c00236⟩, Macromolecules, American Chemical Society, 2020, 53, pp.4055-4067. ⟨10.1021/acs.macromol.0c00236⟩, Macromolecules, 2020, 53, pp.4055-4067. ⟨10.1021/acs.macromol.0c00236⟩
- Accession number :
- edsair.doi.dedup.....bb67c345df9122a405f584f7fb382439