Effects of surfactant and polymerization method on the synthesis of magnetic colloidal polymeric nanoparticles

Puentes-Vara, Luis A.; Gregorio‐Jáuregui, Karla M.; Bolarín, Ana; Navarro-Clemente, M.E.; Dorantes, H.; Corea, M.

doi:10.1007/s11051-016-3524-9

Cited by 9 publications

(5 citation statements)

References 32 publications

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“…This process is commonly named 'bonding' [11,12]. The agglomeration and particle size of composite nanoparticles are influenced by the type of the surfactant employed and its concentration [13].Among these surface modification substances, polyacrylic acid (PAA) has been used to stabilize MNPs by providing electrostatic and steric repulsion against particle aggregation [14]. The synthesis of PAA-Coated Magnetite Nanoparticles has been reported following thermal decomposition route [15] or initiated atom transfer radical polymerization [14].…”

Section: The Aqueous Coprecipitation Methods Of Mnps Synthesis Producementioning

confidence: 99%

Polyacrylic acid-coated iron oxide magnetic nanoparticles: The polymer molecular weight influence

Sánchez

Mártin

Álvarez

et al. 2018

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Magnetic nanoparticles (MNPs), in particular, magnetic iron oxide-based nanoparticles were found to be useful as catalysts and as devices for data storage, environmental remediation and several biomedical applications, due to their excellent properties, such as biocompatibility and high magnetic moment. Polyacrylic acid (PAA) is a weak polyelectrolyte that can be used to stabilize the MNPs. To the best of our knowledge, the influence of PAA molecular weight and PAA concentration over the magnetic and structural properties of iron oxide nanoparticles has not been previously reported. The aim of this paper is to describe the differences evidenced in the properties of different magnetic materials by using PAA for iron oxides stabilization by onepot coprecipitation synthesis. Iron oxide-based magnetic nanoparticles stabilized by polyacrylic acid (PAA) polymers were efficiently prepared and exhaustively characterized. The influence on the employment of two different low PAA molecular weights, Mw 1800 g/mol and 5000 g/mol, in three different iron salts: PAA ratios was analyzed. In summary, the main results showed that: for a certain PAA reactor feed higher oligomer quantities are present in MNPs as higher is the involved molecular weight of the polymeric chain; when molecular weight raises the contribution of loops and tails also does it, allowing having higher polymer contents. For both PAA's Mw employed as the adsorbed PAA increases particles hydrodynamic diameters decreases, and their distribution becomes narrower; the PAA adsorbs onto iron oxides by chemisorption (the most probable interaction is the bidentate bridging). For the studied cases z potential values depend much more on the PAA's quantity adsorbed onto the iron oxides than on the PAA's Mw. MNPs are superparamagnetic and choosing the right shape of particle distribution is not central for getting estimates of the magnetization saturation, the average particle diameter and its standard deviation, while better fits are found with Normal and Log-Normal particle size distributions.

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Section: The Aqueous Coprecipitation Methods Of Mnps Synthesis Producementioning

confidence: 99%

Polyacrylic acid-coated iron oxide magnetic nanoparticles: The polymer molecular weight influence

Sánchez

Mártin

Álvarez

et al. 2018

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…And the selection of surfactants is in accordance with the choice of base liquids. The physical and chemical properties of the base liquids and the surfactants play a decisive role in the fluid properties of the MFs [20,21].…”

Section: Composition Analysis Of Magnetic Fluidsmentioning

confidence: 99%

Review of Magnetic Fluids and their Applications to Vibration Reduction

Haitao

Kuo

Wang

2022

JERR

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Magnetic liquids are a kind of nano-scale functional material with fluidity and superparamagneticity, which is mainly composed of nano-magnetic particles, base liquids and surfactants. Its characteristics mainly include magnetization, levitation, magnetoviscous effect. Compared with the traditional vibration damper, the vibration damper used in spacecraft based on these features has the peculiarity of small volume, low quality, sensitive to inertial force, and does not rely on spacecraft to provide additional energy. There are successful application cases in foreign aerospace and other fields, while the domestic is limited to some theory and experiment, the practical application is less, the lack of in-depth study. More than half of spacecraft failures are caused by vibration, so it is necessary to reduce the vibration of spacecraft. This paper briefly introduces the composition, preparation and characteristics of magnetic liquids, and reviews the typical applications of magnetic liquids in vibration reduction from the 20th century to the present, including the research on vibration reduction of spacecraft, loudspeakers and workbenches.

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“…Different parameters such as flow rates and flow rate ratios can be used for controlling the size of the polymer nanoparticles, but a dominating factor for controlling the size of the nanoparticles is surfactant concentration. [140][141] The scanning electron microscopy (SEM) images of the obtained fluorescent PMMA nanoparticles are shown in Figure 3B-D. Spherical PMMA nanoparticles of about 70 nm diameter have resulted from 1 × 10 −3 m CTAB concentration in the aqueous phase.…”

Section: Randomly Dispersed Dye-doped Fluorescent Polymer Nanoparticlesmentioning

confidence: 99%

Softness Meets with Brightness: Dye‐Doped Multifunctional Fluorescent Polymer Particles via Microfluidics for Labeling

Visaveliya

Köhler

2021

Advanced Optical Materials

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Fluorogenic labeling strategies have emerged as powerful tools for in vivo and in vitro imaging applications for diagnostic and theranostic purposes. Free organic chromophores (fluorescent dyes) are bright but rapidly degrade. Inorganic nanoparticles (e.g., quantum dots) are photostable but toxic to biological systems. Alternatively, dye‐doped polymer particles are promising for labeling and imaging due to their properties that overcome limitations of photodegradation and toxicity. This progress report, therefore, presents various synthesis techniques for the generation of dye‐doped fluorescent polymer particles. Polymer particles are relatively soft compared to inorganic nanoparticles and can be synthesized with characteristics like biocompatibility and stimuli responsiveness. Also, their ability of loading fluorophores through various interactions reveals brightness. Here, a multiscale‐multicolor library of bright and soft fluorescent polymer particles is generated hierarchically. Various microfluidic supported strategies have been applied where fluorophores can be linked to polymeric networks noncovalently and covalently in the interior, and at the surface of nanoparticles (60–550 nm). Besides, microfluidic strategies for hydrophilic and hydrophobic fluorescent polymer microparticles (20–800 µm) have been performed for systematic tuning in size and color combination. Furthermore, soft and bright particulate assemblies are enabled through interfacial interactions at the intermediate scale (600 nm–3 µm) between the nanometer and micrometer lengthscale.

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Effects of surfactant and polymerization method on the synthesis of magnetic colloidal polymeric nanoparticles

Cited by 9 publications

References 32 publications

Polyacrylic acid-coated iron oxide magnetic nanoparticles: The polymer molecular weight influence

Polyacrylic acid-coated iron oxide magnetic nanoparticles: The polymer molecular weight influence

Review of Magnetic Fluids and their Applications to Vibration Reduction

Softness Meets with Brightness: Dye‐Doped Multifunctional Fluorescent Polymer Particles via Microfluidics for Labeling

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