Cellulose Nanocrystals and Methyl Cellulose as Costabilizers for Nanocomposite Latexes with Double Morphology
| Autor: | Stephanie A. Kedzior, Emily D. Cranston, Marc A. Dubé |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Nanocomposite Polymer nanocomposite Renewable Energy Sustainability and the Environment General Chemical Engineering Nanoparticle 02 engineering and technology General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Monomer chemistry Polymerization Methyl cellulose Polymer chemistry engineering Environmental Chemistry Biopolymer Methyl methacrylate 0210 nano-technology |
| Zdroj: | ACS Sustainable Chemistry & Engineering. 5:10509-10517 |
| ISSN: | 2168-0485 |
| DOI: | 10.1021/acssuschemeng.7b02510 |
| Popis: | Cellulose nanocrystals (CNCs) are sustainable rigid rod-shaped nanoparticles that have potential as reinforcing agents in polymer nanocomposites. CNCs can also act as Pickering stabilizers in emulsions and foams due to their amphiphilic nature. In this work, CNCs were rendered surface active through adsorption with the biopolymer methyl cellulose (MC) to produce MC-coated CNCs. MC-coated CNCs were used to stabilize the microsuspension polymerization of methyl methacrylate. Monomer conversion, latex size, and gel content were studied. The microsuspension polymerization resulted in a double morphology where poly(methyl methacrylate) (PMMA) microparticles and nanoparticles were produced simultaneously. The ratio of micro- to nanoparticles could be tuned based on the CNC:MC ratio. Most nanoparticles were attached to the microparticles offering hierarchically structured latexes, although approximately 2 wt % were free in suspension. Drying conditions could be used to control the surface roughness of the dry la... |
| Databáze: | OpenAIRE |
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