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Non‐Covalent Polymer Surface Modification of Cellulose Nanocrystals Using Block Copolymers

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  • معلومة اضافية
    • Contributors:
      Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM); Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC); Department of Chemical Engineering, Queen's University; Queen's University; Queen's University [Kingston, Canada]; Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)
    • بيانات النشر:
      HAL CCSD, 2021.
    • الموضوع:
      2021
    • نبذة مختصرة :
      International audience; Cellulose nanocrystals (CNC) possess desirable mechanical and opticalproperties that make them a candidate in the development of the nextgeneration of polymer-based composites. However, CNC also have a criticalissue associated with their use: their hydrophilicity and incompatibility withhydrophobic polymers. CNC surface properties must be modified for them tobe successfully implemented by the industrial sector. Grafting (co)polymerschains on the CNC surface can provide compatibility to CNC withhydrophobic matrices and expand their potential range of applications. In thiscommunication preliminary results of a simple method to functionalize CNCsurface are reported using block copolymers, where a cationic block anchorsvia complexation to the anionically charged CNC surface and the other blockacts as a stabilizing block, providing dispersibility in various solvents. This is amuch simpler and less expensive method than current routes based oncovalent modification. The block copolymers poly(polyethylene glycolmethacrylate)-b-poly(N-butyl-N′-vinyl imidazolium bromide)(PPEGMA-b-PBuVIm) and poly(styrene)-b-PBuVIm (PS-b-PBuVIm) are firstsynthesized via nitroxide-mediated polymerization and then non-covalentlyadsorbed on the CNC surface. The functionalization has been confirmed viaFT-IR and TGA. The dispersion of polymer-modified CNC materials in organicsolvents is evaluated via dynamic light scattering. Modified CNC yieldedstable dispersions in organic solvents.
    • ISSN:
      1862-832X
      1862-8338
    • الرقم المعرف:
      10.1002/mren.202100046⟩
    • Rights:
      OPEN
    • الرقم المعرف:
      edsair.doi.dedup.....20689f5a0a6e7ae3e663de32d7a9a240