Preparation of polylysine-modified superparamagnetic iron oxide nanoparticles

Gao, Yang; Zhang, Baolin; Wang, Jun; Xie, Su‐Yuan; Li, Xuan

doi:10.1016/j.jmmm.2014.08.040

Cited by 28 publications

(13 citation statements)

References 32 publications

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“…The analysis of X-ray diffraction confirmed the existence of iron oxide particles as shown in Figure 5a. The XRD pattern showed values of 2θ at 30.3º, 35.7º, 43.1º, 53.6º, 57.4º and 62.6º concerning plans reflection of the crystal structure of magnetite (220) (311), (400), (440), (531) and (533), respectively [28][29][30]. The same can be observed for the magnetic nanoparticles coated with polymer ( Figure 5b).…”

Section: Resultssupporting

confidence: 68%

“…This two-step degradation is a characteristic of the polymers produced by plant oils. Observing the mass loss curve of the iron nanoparticles coated with the polymer, we see three degradation stages: the two stages characteristic of the polymer and the third one that is related to the interaction between them, which can be observed at a temperature between 600-800ºC [30,37].…”

Section: Resultsmentioning

confidence: 96%

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Iron Oxide Nanoparticles Coated with Polymer Derived from Epoxidized Oleic Acid and Cis-1,2-Cyclohexanedicarboxylic Anhydride: Synthesis and Characterization

S¹,

D²

2016

J Material Sci Eng

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This study investigated the use of polymer derived from oleic acid for coating iron oxide nanoparticles. The purpose of this study was to provide the magnetic nanoparticles an appropriate surface for stabilization in organic solution. The magnetic nanoparticles coated were produced by mixing of the polymer solution with the ferromagnetic fluid by mechanical stir, followed by magnetic separation. These nanoparticles generated a core-shell behavior, in which the core provides the magnetic properties and the external layer formed by the polymer. The interaction between iron nanoparticles and oleic acid polymer occurred by the affinity of carboxylic group. This interaction makes the nanoparticles hydrophobic, moving to the organic media. The carbon content of the coated nanoparticles was approximately 14%, when analyzed by scattering electron microscopy (SEM-EDX), and 12%, when analyzed by Elemental Analysis of carbon, hydrogen and nitrogen. This percentage confirms the presence of the polymer on the surface of magnetic nanoparticles. The average diameter of the coated and uncoated nanoparticles obtained by transmission electron microscopy was around 13 nm and 11 nm and the average diameter of crystallite by X-ray diffraction was around 8 nm and 12 nm respectively. Averaging all this values we obtain 11 ± 2 nm. The thermogravimetric analysis showed the degradation temperatures starting from 200°C to 500°C, attributed to the polymer, and another one degradation temperature between 650-750ºC, relative to the polymer-nanoparticles interaction. Furthermore, the vibrating sample magnetometer indicated that coated nanoparticles remain magnetic, with increasing saturation magnetization value, when a magnetic field was applied.

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Section: Resultssupporting

confidence: 68%

Section: Resultsmentioning

confidence: 96%

Iron Oxide Nanoparticles Coated with Polymer Derived from Epoxidized Oleic Acid and Cis-1,2-Cyclohexanedicarboxylic Anhydride: Synthesis and Characterization

S¹,

D²

2016

J Material Sci Eng

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“…SPIONs were prepared by the decomposition of 0.7 g Fe(acac) 3 in 15 g PEG at 280°C for 1 h (Yang, Zhang, Wang, Xie, & Li, ). When the reactants were cooled to 80°C, Mal (1.5 g) and p ‐toluene acid monohydrate (MBSA, 0.25 g) were added to the flask and stirred for 1 h to obtain the Mal‐SPIONs solution.…”

Section: Methodsmentioning

confidence: 99%

“…SPIONs were prepared by the decomposition of 0.7 g Fe(acac) 3 in 15 g PEG at 280 C for 1 h (Yang, Zhang, Wang, Xie, & Li, 2015).…”

Section: Preparation Of Mal-spionsmentioning

confidence: 99%

Subcellular distributions of iron oxide nanoparticles in rat brains affected by different surface modifications

Wang

Zhang

et al. 2019

J Biomedical Materials Res

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The impact of the surface modification on the subcellular distribution of nanoparticles in the brain remains elusive. The nanoparticles prepared by conjugating polyethylene glycol and maleic anhydride‐coated superparamagnetic iron oxide nanoparticles (Mal‐SPIONs) with bovine serum albumin (BSA/Mal‐SPIONs) and with Arg–Gly–Asp peptide (RGD/Mal‐SPIONs) were injected into the rat substantia nigra. Observation of transmission electron microscopy (TEM) samples obtained 24 h after perfusion showed that abundant RGD/Mal‐SPIONs accumulated in the myelin sheath, dendrites, axon terminals and mitochondria, and on cell membranes in the brain tissue near the injection site. For rats injected with BSA/Mal‐SPIONs, a few nanoparticles accumulated in the myelin sheath, axon terminals, endoplasmic reticulum, mitochondria, Golgi, and lysosomes of neurons and glial cells while least SPIONs in rats injected with Mal‐SPIONs were found. TEM pictures showed some Mal‐SPIONs were expelled out of the brain. RGD/Mal‐SPIONs diffused extensively to the thalamus, frontal cortex, temporal lobe, olfactory bulb, and brain stem after injection. Only a few BSA/Mal‐SPIONs diffused to the afore‐mentioned brain areas. This work reveals different surface modifications on the iron oxide nanoparticles play crucial roles in their distribution and diffusion in the rat brains.

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“…In addition, -OH and -COOH groups in CA are not only effective linking groups for loading CA on RB but also good chelating groups for organic dyes and heavy metals removal. In recent years, some CA-modified adsorbents have been reported for the adsorption of dyes and heavy metals (Wang et al, 2017(Wang et al, , 2018Yan et al, 2018). According to the earlier work in our group, CA can not only modify bentonite environmentally-friendly via a moderate and rapid route but also avoid secondary pollution (Zhou et al, 2015).…”

Section: Introductionmentioning

confidence: 97%

Citric Acid Modified Bentonite for Congo Red Adsorption

et al. 2019

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Raw bentonite (RB) was chemically modified by citric acid (CA) to obtain a low-cost and environment-friendly citric acid incorporated bentonite (CAB) adsorbent, which was applied for the adsorptive removal of Congo Red (CR). The effect of adsorbent dosage, contact time, ionic strength, surfactant, and pH on adsorption was investigated. Adsorption equilibrium data fitted well with Langmuir model while the Langmuir adsorption capacity of CR on CAB reached up to 384 mg•g −1. Furthermore, CR adsorption on CAB followed pseudo-second kinetic model while intra-particle diffusion was not the only rate-limiting step as determined from intra-particle diffusion model investigation. RB and CAB were characterized by XRD, FT-IR, and BET techniques. A proposed mechanism for the adsorption of CR over CAB suggested the chemical adsorption phenomenon is mainly controlled by chelation, hydrogen bonding, and fixing.

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Preparation of polylysine-modified superparamagnetic iron oxide nanoparticles

Cited by 28 publications

References 32 publications

Iron Oxide Nanoparticles Coated with Polymer Derived from Epoxidized Oleic Acid and Cis-1,2-Cyclohexanedicarboxylic Anhydride: Synthesis and Characterization

Iron Oxide Nanoparticles Coated with Polymer Derived from Epoxidized Oleic Acid and Cis-1,2-Cyclohexanedicarboxylic Anhydride: Synthesis and Characterization

Subcellular distributions of iron oxide nanoparticles in rat brains affected by different surface modifications

Citric Acid Modified Bentonite for Congo Red Adsorption

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