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Cui D, Shi B, Xia Z, Zhu W, Lü C. Construction of polymer brush-decorated amphiphilic Janus graphene oxide nanosheets via a Pickering emulsion template for catalytic applications. NEW J CHEM 2022. [DOI: 10.1039/d2nj03874a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
2D amphiphilic Janus GO nanocatalysts were prepared using Pickering emulsions and grafted polymer brushes, with excellent performance in homogeneous and interfacial catalysis.
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Affiliation(s)
- Donghui Cui
- Institute of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Bingfeng Shi
- Institute of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Zhinan Xia
- Institute of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Wenjing Zhu
- Institute of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Changli Lü
- Institute of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
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2
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Bihani M, Bora PP, Nachtegaal M, Jasinski JB, Plummer S, Gallou F, Handa S. Microballs Containing Ni(0)Pd(0) Nanoparticles for Highly Selective Micellar Catalysis in Water. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02316] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
| | | | - Maarten Nachtegaal
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen, 5232 Switzerland
| | | | - Scott Plummer
- Novartis Institutes for Biomedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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Cobalt Ferrite Nanoparticles: Preparation, characterization and salinized with 3-aminopropyl triethoxysilane. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.egypro.2018.11.300] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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4
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Duan H, Yang Y, Lü J, Lü C. Mussel-inspired construction of thermo-responsive double-hydrophilic diblock copolymers-decorated reduced graphene oxide as effective catalyst supports for highly dispersed superfine Pd nanoparticles. NANOSCALE 2018; 10:12487-12496. [PMID: 29926868 DOI: 10.1039/c8nr02719f] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Well-dispersed ultrafine palladium nanoparticles supported by reduced graphene oxide functionalized with catechol-terminated thermo-responsive block copolymer (PdNPs@BPrGO) were successfully constructed for highly efficient heterogeneous catalytic reduction. We first synthesized a novel temperature-responsive episulfide-containing double-hydrophilic diblock copolymer, poly(poly(ethylene glycol) methyl ether methacrylate-co-2,3-epithiopropyl methacrylate)-block-poly(N-isopropylacrylamide) (P(PEGMA-co-ETMA)-b-PNIPAM), through a reversible addition-fragmentation chain transfer (RAFT) polymerization utilizing a chain-transfer agent with a catechol unit as the end group. The obtained block copolymers can be facilely anchored to the surface of GO via mussel-inspired chemistry. The PdNPs were loaded on GO decorated with block copolymer brushes (BPrGO) as a support via the in situ reduction of palladium precursors with the episulfide ligands of the block copolymer as a stabilizer. The resulting PdNPs@BPrGO nanohybrid catalyst had good water dispersibility and stability. Furthermore, a low dosage of PdNPs@BPrGO catalyst exhibited excellent catalytic performance in the reduction of methylene blue and nitrophenols. The performance was attributed to the ability of PdNPs@BPrGO to facilitate the diffusion of reactants compared to PdNPs@GO without polymer modification. PdNPs@BPrGO also possessed an interesting temperature-responsive catalytic property due to the reversible "coil-to-globule" phase transition behaviour of PNIPAM blocks onto the surface of catalyst. The PdNPs@BPrGO catalyst was successfully recovered and reused five times without any detectible loss in catalytic activity, demonstrating its great potential in a wide range of industrial catalytic applications.
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Affiliation(s)
- Haichao Duan
- College of Chemistry, Northeast Normal University, Changchun, 130024, China.
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Bogacz W, Lemanowicz M, Gierczycki A, Mielańczyk A. Flocculation of flotation tailings using thermosensitive polymers. CHEMICAL AND PROCESS ENGINEERING 2017. [DOI: 10.1515/cpe-2017-0029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Abstract
The key feature of thermosensitive polymers is the reversible transition between the hydrophilic and hydrophopic forms depending on the temperature. Although the main research efforts are focused on their application in different kinds of drug delivery systems, this phenomenon also allows one to precisely control the stability of solid-liquid dispersions. In this paper research on the application of poly(N-isopropylacrylamide) copolymers in processing of minerals is presented. In the experiments tailings from flotation plant of one of the coal mines of Jastrzębska Spółka Węglowa S.A. (Poland) were used. A laser particle sizer Fritsch Analysette 22 was used in order to determine the Particle Size Distribution (PSD). It was proved that there are some substantial issues associated with the application of thermosensitive polymers in industrial practice which may exclude them from the common application. High salinity of suspension altered the value of Lower Critical Solution Temperature (LCST). Moreover, the co-polymers used in research proved to be efficient flocculating agents without any temperature rise. Finally, the dosage needed to achieve steric stabilization of suspension was greatly beyond economic justification.
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Iatridi Z, Vamvakidis K, Tsougos I, Vassiou K, Dendrinou-Samara C, Bokias G. Multifunctional Polymeric Platform of Magnetic Ferrite Colloidal Superparticles for Luminescence, Imaging, and Hyperthermia Applications. ACS APPLIED MATERIALS & INTERFACES 2016; 8:35059-35070. [PMID: 27966875 DOI: 10.1021/acsami.6b13161] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Adequately designed multiresponsive water-soluble graft copolymers were used to serve as a multifunctional polymeric platform for the encapsulation and transfer in aqueous media of hydrophobic magnetic nanoparticles (MNPs). The backbone of the graft copolymers was composed of hydrophilic sodium methacrylate units, hydrophobic dodecyl methacrylate units, and luminescent quinoline-based units, while either the homopolymer poly(N-isopropylacrylamide) or a poly(N,N-dimethylacrylamide-co-N-isopropylacrylamide) copolymer was used as thermosensitive pendent side chains. The polymeric platform forms micellar-type assemblies in aqueous solution, and exhibits pH-responsive luminescent properties and a lower critical solution temperature behavior in water. Depending on the design of the side chains, the cloud point temperatures were determined at 38 and 42 °C, close or slightly above body temperature (37 °C). Above the critical micelle concentration (CMC), both graft copolymers can effectively stabilize in aqueous media as magnetic colloidal superparticles (MSPs), oleylamine-coated MnFe2O4 MNPs, as well as 1:1 mixture of oleylamine-coated MnFe2O4 and CoFe2O4 MNPs. When CoFe2O4 particles were mixed with MnFeO4 in equal amounts, the specific loss power increased significantly, while an opposite trend was observed in the magnetic resonance imaging (MRI) studies, probably due to the anisotropy of cobalt. As a consequence, fine-tuning of the chemical structure of the copolymers and the composition of the MSPs can lead to materials that are able to act simultaneously as luminescent, hyperthermia, and contrast MRI agents.
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Affiliation(s)
| | - Kosmas Vamvakidis
- Department of Chemistry, Aristotle University of Thessaloniki , GR-54124 Thessaloniki, Greece
| | - Ioannis Tsougos
- Department of Medical Physics, University Hospital of Larissa, University of Thessaly, Biopolis , GR-41110 Larisa, Greece
| | - Katerina Vassiou
- Department of Radiology, University Hospital of Larissa, University of Thessaly, Biopolis , GR-41110 Larisa, Greece
| | | | - Georgios Bokias
- Department of Chemistry, University of Patras , GR-26504 Patras, Greece
- FORTH/ICE-HT , Stadiou Street, P.O. Box 1414, GR-26504 Rio-Patras, Greece
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Lemanowicz M, Gierczycki A, Kuźnik W, Milczyńska J, Bulanda P. Application of thermosensitive polymers in stabilization of colloids. ADV POWDER TECHNOL 2016. [DOI: 10.1016/j.apt.2016.01.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Kuroiwa K, Koga Y, Ishimaru Y, Nakashima T, Hachisako H, Sakurai S. Morphological control of hybrid amphiphilic poly(N-isopropylacrylamide)/metal cyanide complexes. Polym J 2016. [DOI: 10.1038/pj.2016.13] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Menelaou M, Iatridi Z, Tsougos I, Vasiou K, Dendrinou-Samara C, Bokias G. Magnetic colloidal superparticles of Co, Mn and Ni ferrite featured with comb-type and/or linear amphiphilic polyelectrolytes; NMR and MRI relaxometry. Dalton Trans 2015; 44:10980-90. [DOI: 10.1039/c5dt00372e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Hydrophobically-modified magnetic superparticles (MSPs) of MFe2O4 NPs were synthesized in the presence of amphiphilic polymers with different architectures and evaluated through NMR and MRI relaxivity measurements.
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Affiliation(s)
- Melita Menelaou
- Department of Chemistry
- Aristotle University of Thessaloniki
- GR-54124 Thessaloniki
- Greece
| | | | - Ioannis Tsougos
- Department of Medical Physics
- University Hospital of Larissa
- University of Thessaly
- GR-41110 Larisa
- Greece
| | - Katerina Vasiou
- Department of Radiology
- University Hospital of Larissa
- University of Thessaly
- GR-41110 Larisa
- Greece
| | | | - Georgios Bokias
- Department of Chemistry
- University of Patras
- GR-26504 Patras
- Greece
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Yao Y, Metwalli E, Niedermeier MA, Opel M, Lin C, Ning J, Perlich J, Roth SV, Müller-Buschbaum P. Nano- and microstructures of magnetic field-guided maghemite nanoparticles in diblock copolymer films. ACS APPLIED MATERIALS & INTERFACES 2014; 6:5244-5254. [PMID: 24621173 DOI: 10.1021/am500597t] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The control over the alignment of nanoparticles within a block copolymer matrix was investigated for different external magnetic fields with respect to producing well-aligned, highly oriented metal-oxide-polymer nanopatterns. Hybrid films were prepared by solution casting under a range of external magnetic fields. The nano- and microstructure of maghemite nanoparticles within poly(styrene-b-methyl methacrylate) diblock copolymer films as a function of the nanoparticle concentration was studied using optical microscopy, atomic force microscopy, scanning electron microscopy, and grazing incidence small-angle X-ray scattering. Because of a polystyrene (PS) coating, the nanoparticles are incorporated in the PS domains of the diblock copolymer morphology. At higher nanoparticle concentrations, nanoparticle aggregates perturb the block copolymer structure and accumulate at the films surface into wire-shaped stripes. These wire-shaped nanoparticle aggregates form mainly because of the competition between nanoparticle-polymer friction and magnetic dipolar interaction. The magnetic behavior of the hybrid films was probed at different temperatures for two orthogonal directions (with the line-shaped particle aggregates parallel and perpendicular to the magnetic field). The hybrid film systems show superparamagnetic behavior and remarkable shape anisotropy that render them interesting for magnetic applications.
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Affiliation(s)
- Yuan Yao
- Physik-Department, Lehrstuhl für Funktionelle Materialien, Technische Universität München , James-Franck-Str. 1, 85748 Garching, Germany
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KUROIWA K, HIGUMA C, SHIMOGAWA Y, HACHISAKO H, SAKURAI S. Development of Amphiphilic N-Isopropylacrylamide Oligomers and Polymers, and Their Composites with Metal Ions. KOBUNSHI RONBUNSHU 2014. [DOI: 10.1295/koron.71.457] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Wang Y, Xia M, Wu Y, Zhu M. Responsive P(NIPAM-co-AA) Particle-Functionalized Magnetic Microspheres. Aust J Chem 2014. [DOI: 10.1071/ch13336] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Functionalized magnetic microspheres were prepared by anchoring cross-linked core–shell poly(N-isopropylacrylamide-co-acrylic acid) (P(NIPAM-co-AA)) nanoparticles onto silica-coated magnetic microspheres (Fe3O4@SiO2). First, the smaller polystyrene/P(NIPAM-co-AA) core–shell nanoparticles were synthesized through seed emulsion polymerization and adhered to the surface of amino-modified Fe3O4@SiO2 micorspheres, which were made using the modified Stöber method through electrostatic interaction under appropriate preparation conditions. An amidation reaction between the carboxylic and amino groups on the respective surfaces was then catalyzed. Finally, the novel architecture magnetic microspheres with multiresponsive functionalities were obtained, and their polymerization conditions, environmental sensitivity, and magnetic properties were discussed and optimized. The superparamagnetism and temperature/pH dual responsivity and excellent dispersibility of the P(NIPAM-co-AA) functionalized magnetic microspheres provide them with high potential to be used in the fields of controlled drug delivery, bioseparation, and catalysis.
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Iatridi Z, Georgiadou V, Menelaou M, Dendrinou-Samara C, Bokias G. Application of hydrophobically modified water-soluble polymers for the dispersion of hydrophobic magnetic nanoparticles in aqueous media. Dalton Trans 2014; 43:8633-43. [DOI: 10.1039/c4dt00393d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Oleylamine-coated CoFe2O4 magnetic nanoparticles were successfully encapsulated into hydrophobically modified water-soluble polymers. The resulting hydrophilic nanohybrids exhibit promising r2-relaxivity properties.
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Affiliation(s)
| | - Violetta Georgiadou
- Department of Chemistry
- Aristotle University of Thessaloniki
- GR-54124 Thessaloniki, Greece
| | - Melita Menelaou
- Department of Chemistry
- Aristotle University of Thessaloniki
- GR-54124 Thessaloniki, Greece
| | | | - Georgios Bokias
- Department of Chemistry
- University of Patras
- GR-26504 Patras, Greece
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Shtykova EV, Kabachii YA, Valetsky PM, Kochev SS, Malyutin AG, Stein BD, Bronstein LM, Svergun DI. Solution study of novel diblock copolymers: Morphology and structural transition. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.10.047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Responsive polymers for analytical applications: A review. Anal Chim Acta 2013; 789:17-32. [DOI: 10.1016/j.aca.2013.05.009] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 05/01/2013] [Accepted: 05/04/2013] [Indexed: 11/24/2022]
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Shahidan NN, Alexander C, Shakesheff KM, Saunders BR. Gelation of microsphere dispersions using a thermally-responsive graft polymer. J Colloid Interface Sci 2013; 396:187-96. [DOI: 10.1016/j.jcis.2013.01.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Revised: 01/10/2013] [Accepted: 01/11/2013] [Indexed: 02/09/2023]
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Sahin F, Turan E, Tumturk H, Demirel G. Core–shell magnetic nanoparticles: a comparative study based on silica and polydopamine coating for magnetic bio-separation platforms. Analyst 2012; 137:5654-8. [DOI: 10.1039/c2an36211b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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