Preparation and properties of poly(acrylic acid) oligomer stabilized superparamagnetic ferrofluid

Lin, Chii-Wann; Lee, Chia‐Fen; Chiu, Wen‐Yen

doi:10.1016/j.jcis.2005.05.023

Cited by 244 publications

(185 citation statements)

References 33 publications

(47 reference statements)

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“…However, the peak at 570 cm −1 shifted to a higher intensity possibly because of the stronger Fe-O bond (Figure 1b). A similar characteristic absorption band was observed by Lin et al [24] during the preparation of a stabilized superparamagnetic ferrofluid.…”

Section: Ftir Peak Assignments For Pure Cmc and Cmc-stabilized Nzvi Psupporting

confidence: 82%

Kinetic removal of Cr6+ by carboxymethyl cellulose-stabilized nano zerovalent iron particles

Ayob

Alias

Dahalan

et al. 2015

Maced. J. Chem. Chem. Eng.

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Carboxymethyl cellulose (CMC) was used in the chemical reduction method for producing dispersible nano zero-valent iron (nZVI) particles served as reactive, mobile and convenient adsorbent. CMC-stabilized nZVI particles at CMC:Fe 2+ = 0.0034 molar ratio were characterized using Fouriertransform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) assisted with probe ultrasonication dispersing tool. FTIR depicted that the CMC monomers were adsorbed onto nZVI particles primarily through carbonyl head groups via monodentate bonding. The botryoidally clusters were the predominant morphology of CMC-stabilized nZVI particles under SEM observation. Those spherical particles were evenly dispersed at sizes less than 100 nm under TEM analysis. nZVI particles stabilization with CMC (at CMC:Fe 2+ molar ratio of 0.005) prevented the aggregation and resulted in high catalytic reactivity observed at pseudo-first order constant value, K 1 of 0.0196 min 1 for Cr 6+ removal in aqueous solution. This study demonstrates that CMC-stabilized nZVI particle has the potential to become an effective agent for in situ subsurface environment remediation.Keywords: aggregation; CMC; kinetic Cr 6+ removal; stabilized nZVI particles; ultrasonication КИНЕТИЧКО ОТСТРАНУВАЊЕ НА Cr 6+ ВО ВОДЕН РАСТВОР НА НАНО-НУЛАВАЛЕНТНИ ЧЕСТИЧКИ НА ЖЕЛЕЗО СТАБИЛИЗИРАНИ СО КАРБОКСИМЕТИЛ ЦЕЛУЛОЗАКарбокисиметил целулоза (CMC) е употребена за хемиска редукција со која се добиваат честички на дисперзивно нулавалентно железо (nZVI) кое може да послужи како реактивен, мобилен и погоден апсорбент. Со CMC-стабилизираните честички на nZVI со моларен однос CMC:Fe 2+ = 0.0034 се карактеризирани со помош на Фуриеова трансформна инфрацрвена спектроскопија (FTIR), скенирачка електронска микроскопија (SEM) и трансмисиона електронска микроскопија (TEM) помогната со ултразвучна дисперзивна алатка. FTIR покажа дека мономерите на СМС се атсорбирани врз честичките на nZVI примарно преку карбонилните групи со монодентатно сврзување. Доминатна морфологија на CMC стабилизираните nZVI се ботриоидни кластери кои се определени со SEM. Овие сферни честички се рамномерно дисперзирани со големина помала од 100 nm како што покажува анализата со TEM. Честичките на nZVI стабилизирани со CMC (со моларен однос на CMC:Fe 2+ од 0.005) ја спречуваат агрегацијата што резултира со висока каталитичка реактивност која е забележана кај вредноста на константа за псевдо-прв ред, K 1 од 0.0196 min 1 при отстранување на Cr 6+ од водни раствори. Оваа студија покажува дека CMC стабилизираните честички на nZVI имаат потенцијал да се користат како ефикасно средство за in situ ремедијација на животната средина.Клучни зборови: агрегација; CMC; кинетичкко отстранување на Cr 6+

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Section: Ftir Peak Assignments For Pure Cmc and Cmc-stabilized Nzvi Psupporting

confidence: 82%

Kinetic removal of Cr6+ by carboxymethyl cellulose-stabilized nano zerovalent iron particles

Ayob

Alias

Dahalan

et al. 2015

Maced. J. Chem. Chem. Eng.

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“…This is similar to other reports in the Refs. [13,20]. The PAMNs were nearly spherical in shape and well-separated, but there was no significant change in size resulting from the PA coating process, as shown in Fig.…”

Section: Preparation and Characterization Of Pamnsmentioning

confidence: 88%

Pullulan acetate coated magnetite nanoparticles for hyper-thermia: Preparation, characterization and in vitro experiments

et al. 2010

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Amphipathic polymer pullulan acetate (PA)-coated magnetic nanoparticles were prepared and characterized by various physicochemical means. The cytotoxicity and cellular uptake of the magnetic nanoparticles were examined. The hyperthermic effect of the magnetic nanoparticles on tumor cells was evaluated. Transmission electron microscopy (TEM) showed that the PA coated magnetic nanoparticles (PAMNs) had spherical morphology. Dynamic light scattering (DLS) showed that the size distribution of PAMNs was unimodal,with an average diameter of 25.8 nm ± 6.1 nm. The presence of the adsorbed layer of PA on the magnetite surface was confirmed by Fourier transform infrared (FTIR) spectroscopy. Magnetic measurements revealed that the saturation magnetization of the PAMNs reached 51.9 emu/g and the nanoparticles were superparamagnetic. Thermogravimetric analysis (TGA) showed that the Fe 3 O 4 particles constituted 75 wt% of the PAMNs. The PAMNs had good heating properties in an alternating magnetic field. Cytotoxicity assay showed that PAMNs exhibited no significant cytotoxicity against L929 cells. TEM results showed that a large number of PAMNs were internalized into KB cells. PAMNs have good hyperthermia effect on KB cells in vitro by magnetic field induced hyperthermia. These novel magnetic nanoparticles have great potential as magnetic hyperthermia mediators.

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“…By employing intermolecular forces, it is easy to prepare assembled nanostructures from various individual NPs, as illustrated in Figure 9 . [ 79 ] Hydrophobic Fe 3 O 4 , CdSe/ZnS NPs, doxorubicin (DOX), and poly( D , L -lacticco -glycolic acid) (PLGA) were incorporated into the hydrophobic part of Pluronic F127 ((EO) 97 (PO) 69 (EO) 97 ) micelles upon sonication. A mixture dispersion of hydrophobic magnetite (or CdSe/ZnS) NPs, DOX, and Reproduced with permission.…”

Section: Multicomponent Hybrid Npsmentioning

confidence: 99%

Synthesis, Functionalization, and Biomedical Applications of Multifunctional Magnetic Nanoparticles

et al. 2010

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Synthesis of multifunctional magnetic nanoparticles (MFMNPs) is one of the most active research areas in advanced materials. MFMNPs that have magnetic properties and other functionalities have been demonstrated to show great promise as multimodality imaging probes. Their multifunctional surfaces also allow rational conjugations of biological and drug molecules,making it possible to achieve target-specific diagnostics and therapeutics.This review fi rst outlines the synthesis of MNPs of metal oxides and alloy sand then focuses on recent developments in the fabrication of MFMNPs of core/shell, dumbbell, and composite hybrid type. It also summarizes the general strategies applied for NP surface functionalization. The review further highlights some exciting examples of these MFMNPs for multimodality imaging and for target-specific drug/gene delivery applications.

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Preparation and properties of poly(acrylic acid) oligomer stabilized superparamagnetic ferrofluid

Cited by 244 publications

References 33 publications

Kinetic removal of Cr6+ by carboxymethyl cellulose-stabilized nano zerovalent iron particles

Kinetic removal of Cr6+ by carboxymethyl cellulose-stabilized nano zerovalent iron particles

Pullulan acetate coated magnetite nanoparticles for hyper-thermia: Preparation, characterization and in vitro experiments

Synthesis, Functionalization, and Biomedical Applications of Multifunctional Magnetic Nanoparticles

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