Encapsulation of nanosized magnetic iron oxide by polyacrylamide via inverse miniemulsion polymerization

Size, shape and surface characteristics strongly affect interfacial interactions, as the presented among iron oxide nanoparticles (NPs) aqueous colloids and bacteria. In other to find the forces among this interaction, we compare three types of surface modified NPs (exposing oxalate, arginine or cysteine residues), based on a simple synthesis and derivation procedure, that allows us to obtain very similar NPs (size and shape of the magnetic core). In this way, we assure that the main difference in the synthesized NPs are the oxalate or amino acid residue exposed, an ideal situation to compare their bacterial capture performance, and so too the interactions among them. Field emission scanning electron microscopy showed homogeneous distribution of particle sizes for all systems synthesized, close to 10 nm. Magnetization, zeta potential, Fourier transformed infrared spectrometry and other studies allow us further characterization. Capture experiments of Pseudomonas putida bacterial strain showed a high level of efficiency, independently of the amino acid used to wrap the NP, when compared with oxalate. We show that bacterial capture efficiency cannot be related mostly to the bacterial and NP superficial charge relationship (as determined by z potential), but instead capture can be correlated with hydrophobic and hydrophilic forces among them.

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“…Agglomeration and clumping of relatively concentrated magnetic NP are well known and reported in previously published work [35].…”

Section: Bacteria Capture Experimentsmentioning

confidence: 59%

Hydrophobic Forces Are Relevant to Bacteria-Nanoparticle Interactions: Pseudomonas putida Capture Efficiency by Using Arginine, Cysteine or Oxalate Wrapped Magnetic Nanoparticles

Figueredo

Saavedra

Cortón

et al. 2018

Colloids and Interfaces

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“…Also organic-inorganic hybrid PHEMA particles embedded with magnetic iron oxide nanoparticles [34,35] and clays [36] were synthesized. However, these procedures have resulted in preparation of PHEMA with broad molecular weight distribution (i.e.…”

Section: Water Soluble Monomersmentioning

confidence: 99%

“…A series of magnetic composite nanoparticles were prepared by miniemulsion (co)polymerization of AAm and MBA in the presence of iron oxide nanoparticles [35]. Hydrophilic magnetic nanoparticles with excellent stability were achieved by adding polymethacrylic acid during the preparation of magnetic iron oxide.…”

Section: Water Soluble Monomersmentioning

confidence: 99%

Inverse Miniemulsion Polymerization of Unsaturated Monomers

Capek¹

2010

Miniemulsion Polymerization Technology

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“…Several techniques can be applied for the in-situ encapsulation of MNPs during the polymer synthesis including emulsion polymerization [24], inverse emulsion polymerization [25], inverseminiemulsion polymerization [26,27]and direct miniemulsion polymerization [1,28,29].The polymer shells were composed mostly by polymers obtained by free radical chain-growth polymerization, like polystyrene and copolymers, poly(methyl methacrylate), polyacrylamide, etc. However, there are several other polymers with very interesting properties that are obtained by step-growth polymerization, like polyurethane (PU) and poly(urea-urethane) (PUU), that could be used to encapsulate MNPs.…”

Section: Introductionmentioning

confidence: 99%

Incorporation of superparamagnetic nanoparticles into poly(urea-urethane) nanoparticles by step growth interfacial polymerization in miniemulsion

Chiaradia

Valério

Feuser

et al. 2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Encapsulation of nanosized magnetic iron oxide by polyacrylamide via inverse miniemulsion polymerization

Cited by 132 publications

References 27 publications

Hydrophobic Forces Are Relevant to Bacteria-Nanoparticle Interactions: Pseudomonas putida Capture Efficiency by Using Arginine, Cysteine or Oxalate Wrapped Magnetic Nanoparticles

Hydrophobic Forces Are Relevant to Bacteria-Nanoparticle Interactions: Pseudomonas putida Capture Efficiency by Using Arginine, Cysteine or Oxalate Wrapped Magnetic Nanoparticles

Inverse Miniemulsion Polymerization of Unsaturated Monomers

Incorporation of superparamagnetic nanoparticles into poly(urea-urethane) nanoparticles by step growth interfacial polymerization in miniemulsion

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