Transparent, thermal stable and hydrophobic coatings from fumed silica/fluorinated polyacrylate composite latex via in situ miniemulsion polymerization

We report the synthesis of high-performance organic–inorganic hybrid fluorescent nanocapsules comprising a polymer shell armored with an inorganic layer and a liquid core containing a fluorophore. The polymeric capsules are synthesized by free radical miniemulsion polymerization and contain covalently bound carboxylate surface functionalities that allow for the binding of metal ions through electrostatic interaction. A cerium(IV) oxide nanoparticle layer, formed in situ at the surface of the hybrid nanocapsules, acts as oxygen scavenger and keeps external reactive molecular oxygen from entering into the capsules, eventually resulting in a reduction of the photooxidation of encapsulated fluorescent molecules. This approach shows an increase in the fluorescence of the model organic fluorophore terrylene diimide by avoiding the ground-state molecular oxygen to react with electronically excited states of the fluorescent hydrocarbon molecule.

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Facile fabrication of Janus magnetic microcapsules via double in situ miniemulsion polymerization

Polymer Chemistry ◽

10.1039/c2py20863f ◽

2013 ◽

Vol 4 (5) ◽

pp. 1459-1466 ◽

Cited By ~ 20

Author(s):

Jianan Zhang ◽

Shuilai Qiu ◽

Yulu Zhu ◽

Zhengqi Huang ◽

Beibei Yang ◽

...

Keyword(s):

Miniemulsion Polymerization ◽

Facile Fabrication

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Miniemulsion copolymerization of (meth)acrylates in the presence of functionalized multiwalled carbon nanotubes for reinforced coating applications

Beilstein Journal of Nanotechnology ◽

10.3762/bjnano.8.134 ◽

2017 ◽

Vol 8 ◽

pp. 1328-1337 ◽

Cited By ~ 4

Author(s):

Bertha T Pérez-Martínez ◽

Lorena Farías-Cepeda ◽

Víctor M Ovando-Medina ◽

José M Asua ◽

Lucero Rosales-Marines ◽

...

Keyword(s):

Carbon Nanotubes ◽

Multiwalled Carbon Nanotubes ◽

Miniemulsion Polymerization ◽

Polymer Chains ◽

Multiwalled Carbon ◽

Neat Polymer ◽

In Situ Composites ◽

3D Network ◽

Insoluble Polymer

Film forming, stable hybrid latexes made of methyl metacrylate (MMA), butyl acrylate (BA) and 2-hydroxyethyl methacrylate (HEMA) copolymer reinforced with modified multiwalled carbon nanotubes (MWCNTs) were synthesized by in situ miniemulsion polymerization. The MWCNTs were pretreated by an air sonication process and stabilized by polyvinylpyrrolidone. The presence of the MWCNTs had no significant effect on the polymerization kinetics, but strongly affected the polymer characteristics (T g and insoluble polymer fraction). The performance of the in situ composites was compared with that of the neat polymer dispersion as well as with those of the polymer/MWCNT physical blends. The in situ composites showed the presence of an additional phase likely due to the strong interaction between the polymer and MWNCTs (including grafting) that reduced the mobility of the polymer chains. As a result, a substantial increase of both the storage and the loss moduli was achieved. At 60 °C, which is above the main transition region of the polymer, the in situ composites maintained the reinforcement, whereas the blends behaved as a liquid-like material. This suggests the formation of a 3D network, in good agreement with the high content of insoluble polymer in the in situ composites.

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Production of PMMA Nanoparticles Loaded with Praziquantel Through “In Situ” Miniemulsion Polymerization

Macromolecular Reaction Engineering ◽

10.1002/mren.201200036 ◽

2012 ◽

Vol 7 (1) ◽

pp. 54-63 ◽

Cited By ~ 15

Author(s):

Laís B. Fonseca ◽

Márcio Nele ◽

Nádia Maria Volpato ◽

Rafael C. Seiceira ◽

José Carlos Pinto

Keyword(s):

Miniemulsion Polymerization

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Silica-Polystyrene Nanocomposite Particles Synthesized by Nitroxide-Mediated Polymerization and Their Encapsulation through Miniemulsion Polymerization

Journal of Nanomaterials ◽

10.1155/jnm/2006/76371 ◽

2006 ◽

Vol 2006 ◽

pp. 1-10 ◽

Cited By ~ 26

Author(s):

Bérangère Bailly ◽

Anne-Carole Donnenwirth ◽

Christèle Bartholome ◽

Emmanuel Beyou ◽

Elodie Bourgeat-Lami

Keyword(s):

Silica Nanoparticles ◽

Functional Group ◽

Silica Surface ◽

Miniemulsion Polymerization ◽

Molecular Weights ◽

Transmission Electron ◽

Shell Particles ◽

Terminal Functional Group ◽

Nitroxide Mediated Polymerization

Polystyrene (PS) chains with molecular weights comprised between 8000 and 64000g⋅mol-1and narrow polydispersities were grown from the surface of silica nanoparticles (Aerosil A200 fumed silica and Stöber silica, resp.) through nitroxide-mediated polymerization (NMP). Alkoxyamine initiators based on N-tert-butyl-1-diethylphosphono-2,2-dimethylpropyl nitroxide (DEPN) and carrying a terminal functional group have been synthesized in situ and grafted to the silica surface. The resulting grafted alkoxyamines have been employed to initiate the growth of polystyrene chains from the inorganic surface. The maximum grafting density of the surface-tethered PS chains was estimated and seemed to be limited by initiator confinement at the interface. Then, the PS-grafted Stöber silica nanoparticles were entrapped inside latex particles via miniemulsion polymerization. Transmission electron microscopy indicated the successful formation of silica-polystyrene core-shell particles.

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