Charge effect of superparamagnetic iron oxide nanoparticles on their surface functionalization by photo-initiated chemical vapour deposition

Javanbakht, Taraneh; Laurent, Sophie; Stanicki, Dimitri; Raphael, Wendell; Tavares, Jason Robert

doi:10.1007/s11051-015-3276-y

Cited by 17 publications

(13 citation statements)

References 31 publications

(21 reference statements)

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“…47 We thus expect treated beads to remain stable in suspension without additives, thus enabling automated detection after container swirling over extended periods. Radical polymerization of syngas initiated by UVC radiation has already been tested on copper, 48 polypropylene and polyethylene terephthalate 49 , nanocrystalline cellulose 50 , superparamagnetic iron oxide nanoparticles 51 and metal oxide nanoparticles 52 substrates with success.…”

Section: Introductionmentioning

confidence: 99%

Gas-Phase Surface Engineering of Polystyrene Beads Used to Challenge Automated Particle Inspection Systems

Labonté

Marion

Virgilio

2016

Ind. Eng. Chem. Res.

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Container challenge sets, used in the qualification and validation of automated visible particle inspection systems in the parenteral drug industry, are prepared by seeding a single standardized polystyrene-divinylbenzene (PS-DVB) bead inside the commercial product to mimic foreign particulates. Due to its low surface energy and wettability, the bead adheres to container walls, hindering its detection by the motion based inspection system. The aim of this research is to modify the surface properties of the bead in such a way that it repulses the inner walls and stays in suspension inside the liquid product. The surface treatment consists of a photoinduced chemical vapor deposition (PICVD) process using syngas and UVC light. Following 2 treatment, newly grafted C-OH, C-O-C, C=O and COOH functional groups on the bead's surface are observed by XPS and FTIR spectroscopy, leading to an increase in the surface energy from 31 ± 1 to 65 ± 2 mJ/m 2 , and a corresponding zeta potential decrease from -38 mV to -61 mV.Finally, treated 100 µm, 200 µm and 500 µm PS-DVB beads suspended in water exhibit higher dispersion stability over time than untreated beads. These results show the potential of syngas PICVD to provide an effective solution to the stability issue of containers challenge sets for the validation of automated particle inspection systems, enabling significant savings of time and money to the parenteral drug industry.

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Section: Introductionmentioning

confidence: 99%

Gas-Phase Surface Engineering of Polystyrene Beads Used to Challenge Automated Particle Inspection Systems

Labonté

Marion

Virgilio

2016

Ind. Eng. Chem. Res.

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“…The Si─O vibrational bond, which is due to the silica shell on the surface of positively and negatively charged SPIONs, appears at around 1100 cm −1 . The absorption around 1474 cm −1 is due to binding vibration of ─CH 2 , and the broad band at 3400–3500 cm −1 corresponds to the presence of hydroxyl bonds, respectively …”

Section: Resultsmentioning

confidence: 99%

“…Using a Perkin Elmer spectrum 65 FTIR spectrometer, attenuated total absorbance probe, in the range of 600–4000 cm −1 FTIR spectroscopy was carried out at 4 cm −1 resolution were recorded. Thirty two scans were co‐added to improve S/N …”

Section: Methodsmentioning

confidence: 99%

Related physicochemical, rheological, and dielectric properties of nanocomposites of superparamagnetic iron oxide nanoparticles with polyethyleneglycol

Javanbakht

Laurent

Stanicki

et al. 2019

J of Applied Polymer Sci

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In this study, we present the physicochemical, rheological, and dielectric properties of the superparamagnetic iron oxide nanoparticles (SPIONs) coated with polyethyleneglycol (PEG). It was observed that the increase of the concentration of PEG prohibited the sedimentation of nanoparticles, which increased the colloidal stability of nanocomposites. The surface study of the polymer and the nanocomposites using TOF-SIMS showed that the samples did not have the same surface properties. The analysis of the intensity ratios of the FeO + /Fe + and OH − /O − peaks of the nanocomposites of bare, positively, and negatively charged SPIONs with PEG revealed that no reduction occurred for these nanoparticles when coated with PEG, whereas the iron atoms on the surface of PEG negatively charged SPIONs were less oxidized than those on the surface of PEG-bare SPIONs, and the iron atoms on the surface of PEG positively charged SPIONs were more oxidized than the second ones. The rheological study of the polymer and the nanocomposites revealed that the presence of SPIONs did not change the rheological behavior of PEG. The analysis of the dielectric properties of PEG and its composites with SPIONs showed that when SPIONs particles (bare and positively charged) were included in PEG, low frequency dispersion (LFD) was strongly enhanced, that the iron oxide nanoparticles reduced the impedance of PEG in the nanocomposites and that the difference in their surface charge affected their impedance. Taken together, these results suggest that the nanocomposites of PEG with SPIONs have appropriate properties for fluid modification and applications in the nanotechnology and photovoltaic devices.

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“…The treated SPIONs were taken directly from photo-initiated chemical vapor deposition (PICVD). 89) The Fe 2 O 3 thin films were prepared by Kulal,90) which were obtained by immersing a glass/stainless steel substrate in a FeSO 4 solution and a NaOH solution, in turn. In the experiment of Neto,91) sample S1 is magnectic iron oxide, S2 is magnetic iron oxide coated with PDMS at 250°C for 8 cycles in soxhlet, S3 is magnetic iron oxide coated with PDMS at 250°C, 17 cycles in soxhlet, S4 is magnetic iron oxide coated with PDMS at 50°C for 8 cycles in soxhlet, S5 is magnetic iron oxide coated with PDMS at 50°C 17 cycles in soxhlet.…”

Section: Methodsmentioning

confidence: 99%

Measurement for Contact Angle of Iron Ore Particles and Water

Tang

et al. 2018

ISIJ Int.

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Contact angle, as a key index for the wettability of iron ore particles by water, is of very important for the iron ore processing like beneficiation, sintering and pelletizing.Methods developed for measuring the contact angles generally can be divided into direct and indirect methods, which were summarized in present study and their advantages and disadvantages are all compared. Capillary rise method may be the most applicative approach for porous particles.Most of the contact angles between iron ore particles with water reported in the literatures were collected and the influence of the physical and chemical properties of iron ore particles were analyzed. The result shows that iron ore particles are hydrophilic and its water contact angles are influenced by the complicate interaction of chemical compositions, especially the content of oxy-hydroxides and the surface morphology. Generally, the water contact angle of goethite is the smallest. Complicate surface morphology suggest a better wettability. Furthermore, the penetration behavior of natural iron ore particles and synthetic iron ore particles are obviously different during the contact angle measurement. Compared with sessile drop method, capillary rise methods are more suitable for the measurement of natural iron oxides. Some empirical equations to predict the contact angle were collected and compared. The wettability can be improved by increasing the surface morphology of particles, coating of iron ore particles, and hightemperature treatment.

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Charge effect of superparamagnetic iron oxide nanoparticles on their surface functionalization by photo-initiated chemical vapour deposition

Cited by 17 publications

References 31 publications

Gas-Phase Surface Engineering of Polystyrene Beads Used to Challenge Automated Particle Inspection Systems

Gas-Phase Surface Engineering of Polystyrene Beads Used to Challenge Automated Particle Inspection Systems

Related physicochemical, rheological, and dielectric properties of nanocomposites of superparamagnetic iron oxide nanoparticles with polyethyleneglycol

Measurement for Contact Angle of Iron Ore Particles and Water

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