Green Hydrophilic Capsules from Cellulose Nanocrystal-Stabilized Pickering Emulsion Polymerization: Morphology Control and Spongelike Behavior | Zendy

Hanaé Dupont | Zendy; Eric Laurichesse | Zendy; Valérie Héroguez | Zendy; Véronique Schmitt | Zendy

Open Access

Green Hydrophilic Capsules from Cellulose Nanocrystal-Stabilized Pickering Emulsion Polymerization: Morphology Control and Spongelike Behavior

Author(s) -

Hanaé Dupont,

Eric Laurichesse,

Valérie Héroguez,

Véronique Schmitt

Publication year - 2021

Publication title -

biomacromolecules

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.689

H-Index - 220

eISSN - 1526-4602

pISSN - 1525-7797

DOI - 10.1021/acs.biomac.1c00581

Subject(s) - pickering emulsion , polymerization , materials science , polymer chemistry , chemical engineering , emulsion , emulsion polymerization , ethylene glycol , copolymer , cellulose , methacrylate , nanoparticle , polymer , composite material , nanotechnology , engineering

Pickering inverse emulsions of hydroxyl oligoethylene glycol methacrylate were stabilized in isopropyl myristate, a biofriendly oil, using surface-modified cellulose nanocrystals (CNCs) as stabilizing particles. The emulsions were further polymerized by free or controlled radical polymerization (ATRP), taking advantage of the bromoisobutyrate functions grafted on the CNC surface. Suspension polymerization of the emulsion led to full bead or empty capsule morphologies, depending on the initiation locus. The thickness of the CNC shell surrounding the polymerized emulsions could be tuned by modulating the aggregation state of the CNCs after their surface modification. An increase from 6 to 40 CNC layers helped improve the compression moduli of the beads from a dozen to hundreds of kPa.

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