Liquid–liquid phase transfer of magnetite nanoparticles

Machunsky, Stefanie; Grimm, P.; Schmid, Hans‐Joachim; Peuker, Urs A.

doi:10.1016/j.colsurfa.2009.07.014

Cited by 39 publications

(25 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…NPPAA were then coated with the PDMS-co-APMS copolymer. The method described here, consisting of extracting nanoparticles from water to an organic solvent, was successfully achieved by other teams using surfactants [29,30]. Meriguet et al used sodium dodecyl sulfate (SDS) molecules, which interacted with nanoparticles by electrostatic interactions.…”

Section: The Coatings Of Nanoparticle and Their Characterizationmentioning

confidence: 99%

Polydimethylsiloxane (PDMS) Coating onto Magnetic Nanoparticles Induced by Attractive Electrostatic Interaction

2012

View full text Add to dashboard Cite

Abstract:In this article, we present an efficient synthesis pathway of polydimethylsiloxane (PDMS) coated magnetic nanoparticles from hydrophilic polyacrylate coated ferrofluids (NPPAA). A block copolymer based on polydimethylsiloxane is selected for its propensity to interact with the carboxylate functions on the NPPAA. The interaction is due to negative charges on NPPAA and positive ones on the amphiphilic copolymer. The synthesis is achieved by interfacial interaction, simplifying the purification of the PDMS-coated nanoparticles (NPPDMS) from subproducts such as ions and water. NPPDMS are well dispersed in hydrophobic solvents (toluene, diethyl ether) and can then be embedded into a curable PDMS polymer.

show abstract

Section: The Coatings Of Nanoparticle and Their Characterizationmentioning

confidence: 99%

Polydimethylsiloxane (PDMS) Coating onto Magnetic Nanoparticles Induced by Attractive Electrostatic Interaction

2012

View full text Add to dashboard Cite

show abstract

“…The nanoparticles are sterically stabilized due to adsorption of ricinoleic acid dissolved in the organic solvent (Rudolph 2012). According to Machunsky and Peuker (2007), Machunsky et al (2009) a surfactant mass fraction in the solvent of 2 % and a ratio of 0.2 g surfactant per g iron oxide nanoparticles will guarantee the complete transfer of the particles and a minimum amount of fatty acid. Dichloromethane was used as solvent in this step.…”

Section: Nanoparticles Stabilization: Phase Transfermentioning

confidence: 99%

Synthesis of Functionalized Magnetic Beads Using Spray Drying

Kemtchou¹,

Schäfer²,

Peuker³

2014

Upscaling of Bio-Nano-Processes

View full text Add to dashboard Cite

The goal of Technische Universität Bergakademie Freiberg (TUBAF) in MagPro 2 Life was to develop, based on Solution Process (SolPro), a low-cost scalable synthesis process as well as to optimize the efficiency of particle production regarding safety and ecological aspects. Depending on target protein charges in the extraction pH range, magnetic beads with cationic and anionic functionalities (CEX-and AEX-SolPro beads) were successfully synthesized and characterized. Both types of beads were equipped with the appropriate functionalities allowing their application in bioseparation (superparamagnetic, ion exchange properties). Characterization analyzes of the SolPro beads (CEX und AEX) showed the high potential of the developed processes. CEX-SolPro particles possess a lysozyme extraction capacity of approximately 280 mg/g, which is about three times higher than similar CEX-SolPro beads (same composition) produced by Hickstein and Peuker (2009) (77.6 mg/g). The newly designed and produced AEX-SolPro beads using poly(allyl)amine (PAAm) as anion exchanger exhibit extraction capacities of 85 mg/g for BSA as well as 145 mg/g for BBI. Several investigations proved that a quaternization of amino groups of poly(allyl)amine anchored on the beads surface increase their extraction capacity by a factor of 3. One kilogram of produced PAAm-SolPro was successfully tested by Solae Denmark in a pilot food line application.

show abstract

“…The particle system was 16 Incorporation of the functionalization step into the emulsification step chosen as simultaneous modification and phase transfer was already achieved at a planar interface. The functionalization of magnetite with ricinoleic acid is described in detail in [88,89].…”

Section: Hppf Homogenization For Reduced Abrasion and Process Intensimentioning

confidence: 99%

Continuous Preparation of Polymer/Inorganic Composite Nanoparticles via Miniemulsion Polymerization

Merkel

Hecht

Schoth

et al. 2015

Colloid Process Engineering

View full text Add to dashboard Cite

Composite nanostructured particles can be produced by polymerization of monomer miniemulsion droplets loaded with inorganic nanoparticles. The article gives an overview on the development of a scalable continuous process for the production of such hybrid nanoparticles via miniemulsion polymerization. Different possibilities for the necessary surface modification of the inorganic material are discussed in detail. Furthermore, the influence of the surfactant concentration on the droplet size after emulsification as well as on the nucleation mechanisms during polymerization is highlighted. Possible process routes for the emulsification of the nanoparticle-loaded monomer phase are compared taking into account different process and material parameters, such as energy consumption, abrasion, dispersed phase viscosity, inorganic particle load and size, and morphology of the resulting hybrid particles. The possibility of an industrial implementation via an integrated high pressure homogenization process and a subsequent continuous polymerization are presented.

show abstract

Liquid–liquid phase transfer of magnetite nanoparticles

Cited by 39 publications

References 19 publications

Polydimethylsiloxane (PDMS) Coating onto Magnetic Nanoparticles Induced by Attractive Electrostatic Interaction

Polydimethylsiloxane (PDMS) Coating onto Magnetic Nanoparticles Induced by Attractive Electrostatic Interaction

Synthesis of Functionalized Magnetic Beads Using Spray Drying

Continuous Preparation of Polymer/Inorganic Composite Nanoparticles via Miniemulsion Polymerization

Contact Info

Product

Resources

About