Green Hydrophilic Capsules from Cellulose Nanocrystal-Stabilized Pickering Emulsion Polymerization: Morphology Control and Spongelike Behavior
| Autor: | Véronique Schmitt, Eric Laurichesse, Hanaé Dupont, Valérie Héroguez |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Polymers and Plastics Radical polymerization Capsules Bioengineering 02 engineering and technology 010402 general chemistry 01 natural sciences Polymerization Biomaterials chemistry.chemical_compound Materials Chemistry Cellulose technology industry and agriculture 021001 nanoscience & nanotechnology Pickering emulsion 0104 chemical sciences chemistry Chemical engineering Nanocrystal Emulsion Nanoparticles Surface modification Emulsions Suspension polymerization 0210 nano-technology |
| Zdroj: | Biomacromolecules. 22:3497-3509 |
| ISSN: | 1526-4602 1525-7797 |
| DOI: | 10.1021/acs.biomac.1c00581 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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