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Factors influencing the preparation of hollow polymer-graphene oxide microcapsules via Pickering miniemulsion polymerization
Citation
Teo, GH and Ng, YH and Zetterlund, PB and Thickett, SC, Factors influencing the preparation of hollow polymer-graphene oxide microcapsules via Pickering miniemulsion polymerization, Polymer, 63 pp. 1-9. ISSN 0032-3861 (2015) [Refereed Article]
Copyright Statement
Copyright 2015 Elsevier Ltd All rights reserved
DOI: doi:10.1016/j.polymer.2015.02.035
Abstract
The synthesis of hollow, cross-linked polymer particles (‘capsules’) via Pickering miniemulsion polymerization using graphene oxide (GO) nanosheets as sole surfactant is reported. The influence of monomer, cross-linker and initiator type was studied, in addition to hydrophobe loading and initiator concentration. The desired hollow capsule morphology was shown to be strongly dependent on the choice of cross-linker; an aromatic crosslinker (divinylbenzene) consistently yielded hollow structures as determined by transmission electron microscopy, whereas ethylene glycol dimethacrylate typically resulted in polymer particles with a solid core. The use of an aromatic monomer with high propagation rate coefficient (benzyl methacrylate) and a strongly oil-soluble initiator, lauroyl peroxide, resulted in capsule synthesis with very high conversion (>85%) after 6 h. Surface area and pore analysis of the capsules established that while the capsules possessed a hollow interior, the shell was essentially non-porous. The potential of these materials towards novel nanocarbon-based materials was demonstrated via the preservation of colloidal stability and particle morphology after chemical reduction of GO, in addition to successful encapsulation of hydrophobic nanoparticles within the capsule core.
Item Details
Item Type: | Refereed Article |
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Keywords: | colloids, graphene oxide, nanoparticles, hollow capsules, hollow particles, miniemulsion polymerization |
Research Division: | Chemical Sciences |
Research Group: | Physical chemistry |
Research Field: | Colloid and surface chemistry |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the chemical sciences |
UTAS Author: | Thickett, SC (Dr Stuart Thickett) |
ID Code: | 100081 |
Year Published: | 2015 |
Web of Science® Times Cited: | 38 |
Deposited By: | Chemistry |
Deposited On: | 2015-04-30 |
Last Modified: | 2017-10-24 |
Downloads: | 0 |
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