Nanoprecipitation of particles by atomization of a polymer solution in circulating medium

Pereira, André Anderson Costa; Sousa, Elisa Maria Bittencourt Dutra de; Cellet, Thelma S.P.; Fragal, Vanessa H.; Fernandes, Lenita da Silva Lucio; Jesus, Anderson Alles de; Oliveira, Jackson Araújo de

doi:10.1088/2053-1591/aa92f4

Cited by 2 publications

(2 citation statements)

References 43 publications

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“…These results can be explained by the performance of the atomization apparatus, as well as by the nature of each reaction. The atomizing nozzle used in the present study is capable of generating small droplets (in the micrometer range) as reported by Pereira et al (2017). Thus, the use of inorganic and polymeric stabilizers protected the interfacial area provided by the liquid atomization via steric stabilization and the initiator directly converted the monomer.…”

Section: Effect Of Operational Conditions On Particle Size Of Mma-bassupporting

confidence: 51%

“…), atomization with a two-fluid nozzle is a simple method (requires only pump, gas line and atomization nozzle), requires low installation and operation cost and is easy to scale-up (Fernandes et al (2014); Kemp et al 2016). In addition to the advantages mentioned, the strict control of droplet size makes this method a potential candidate for use in the fabrication of polymer particles (Kemp et al 2016;Pereira et al 2017).…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of methyl methacrylate-based polymer particles by miniemulsion and combined miniemulsion/emulsion polymerization using an atomization apparatus

Fernandes

Jesus

Padilha

et al. 2020

Braz. J. Chem. Eng.

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The present study evaluated the fabrication of methyl methacrylate-based polymer nanoparticles by miniemulsion and combined miniemulsion/emulsion polymerization using an atomization apparatus with two-fluid nozzle. In both reactions, the effects of the operational conditions were investigated on the morphology and particle size distribution of polymer particles. After multivariate analysis, it was observed that the size of the poly(methyl methacrylate) particles is a function of gas pressure in the experiments stabillized by sodium lauryl sulfate (SLS), but this did not occur in reactions stabillized by inorganic and polymeric stabilizers. The use of inorganic stabilizer made possible the fabrication of polymer particles smaller than 300 nm. In combined miniemulsion/emulsion polymerization with SLS, high concentrations of surfactant (> 0.4% w/w) and intermittent monomer feeding enabled not only an increase of the solid concentrations, but also a reduction of particle size. In addition, styrene-methyl methacrylate nanoparticles were successfully obtained (< 30 nm), according to dynamic light scattering and transmission electron microscopic analyses.

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Section: Effect Of Operational Conditions On Particle Size Of Mma-bassupporting

confidence: 51%

Section: Introductionmentioning

confidence: 99%

Fabrication of methyl methacrylate-based polymer particles by miniemulsion and combined miniemulsion/emulsion polymerization using an atomization apparatus

Fernandes

Jesus

Padilha

et al. 2020

Braz. J. Chem. Eng.

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Polymer nanoparticle sizes from dynamic light scattering and size exclusion chromatography: the case study of polysilanes

et al. 2018

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Dynamic light scattering (DLS) and size exclusion chromatography (SEC) are among the most popular methods for determining polymer sizes in solution. Taking dendritic and network polysilanes as a group of least soluble polymer substances, we critically compare and discuss the difference between nanoparticle sizes, obtained by DLS and SEC. Polymer nanoparticles are typically in poor solution conditions below the theta point and are therefore in the globular conformation. The determination of particle sizes in the presence of attractive interactions is not a trivial task. The only possibility to measure, aggregation-free, the true molecular size of polymer nanoparticles in such a solution regime, is to perform the experiment with a dilute solution of globules (below the theta point and above the miscibility line). Based on the results of our polysilane measurements, we come to a conclusion that DLS provides more reliable results than SEC for dilute solutions of globules. General implications for the size measurements of polymer nanoparticles in solution are discussed.

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Nanoprecipitation of particles by atomization of a polymer solution in circulating medium

Cited by 2 publications

References 43 publications

Fabrication of methyl methacrylate-based polymer particles by miniemulsion and combined miniemulsion/emulsion polymerization using an atomization apparatus

Fabrication of methyl methacrylate-based polymer particles by miniemulsion and combined miniemulsion/emulsion polymerization using an atomization apparatus

Polymer nanoparticle sizes from dynamic light scattering and size exclusion chromatography: the case study of polysilanes

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