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Singh S, Pandey JP, Sen G. Microwave assisted synthesis of guar gum based biopolymeric macromolecule optimized as a flocculant for mineral ore processing. Int J Biol Macromol 2022; 220:307-315. [PMID: 35961561 DOI: 10.1016/j.ijbiomac.2022.08.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 08/03/2022] [Accepted: 08/07/2022] [Indexed: 11/17/2022]
Abstract
The research endeavour to synthesize a novel, non-toxic, eco-friendly guar gum based biopolymeric macromolecule, [2-(methacryloyloxy) ethyl] trimethyl ammonium chloride grafted guar gum (GG-g-P (MAETMAC)) that has been optimized as a flocculant for mineral ore processing. The synthesis was performed using non-radiation and microwave assisted technique to compare and ensure the superiority of the latter. The intended grafting of monomer[2-(methacryloyloxy) ethyl] trimethyl ammonium chloride on to the biological macromolecule (guar gum) was confirmed through standard physico-chemical characterization techniques namely X-ray diffraction (XRD), scanning electron microscopy (SEM), thermal gravimetric analysis (TGA), Fourier transform infrared (FTIR) spectroscopy, ultraviolet-visible (UV-visible) spectroscopy, intrinsic viscosity study, etc. The flocculation efficacy of the synthesized novel graft copolymer was thoroughly investigated in kaolin, coal fine, and iron ore suspensions. We have explored a graft copolymer, [2-(methacryloyloxy) ethyl] trimethyl ammonium chloride grafted guar gum that has not been studied yet to the best of our knowledge. To establish the superiority of the synthesized biomaterial, the flocculation study revealed that the best grade of the synthesized novel graft copolymer showed flocculation efficacy of 90 % in kaolin, 69 % in Iron ore, and 29 % in coal fine suspensions which was significantly higher than using alum as a coagulant which provided 36 % efficacy in kaolin, 29 % in iron ore and 10 % in coal fine suspensions.
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Affiliation(s)
- Smita Singh
- Department of Chemistry, Birla Institute of Technology, Mesra, Ranchi, Jharkhand, India
| | - J P Pandey
- Department of Chemistry, Birla Institute of Technology, Mesra, Ranchi, Jharkhand, India
| | - Gautam Sen
- Department of Chemistry, Birla Institute of Technology, Mesra, Ranchi, Jharkhand, India.
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Naruhashi T, Chikazawa T, Kohri M, Taniguchi T, Kishikawa K, Karatsu T. Construction of insulating layers on conductive nickel-plated core particles by thermal fusion of heterocoagulated polymer shell particles. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Šálek P, Trousil J, Nováčková J, Hromádková J, Mahun A, Kobera L. Poly[2-(dimethylamino)ethyl methacrylate- co-ethylene dimethacrylate]nanogel by dispersion polymerization for inhibition of pathogenic bacteria. RSC Adv 2021; 11:33461-33470. [PMID: 35497568 PMCID: PMC9042309 DOI: 10.1039/d1ra06231j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 10/07/2021] [Indexed: 02/03/2023] Open
Abstract
Bacterial infections and antimicrobial resistance are one of the major public health problems and various strategies to prevent potential threats have been developed. Protonated polymers were proven as efficient agents against several microbial pathogens. Poly[2-(dimethylamino)ethyl methacrylate] (PDMAEMA) linear polymer and its copolymers represent one example of functional materials which inhibit the growth of both harmful Gram-negative and Gram-positive bacteria. However, the antimicrobial effect of positively charged PDMAEMA particles has been never tested. In this report, we deeply studied several parameters of free-radical polymerization, including the effect of crosslinking monomer, medium composition, solvency and polarity, and type and concentration of initiator and stabilizer, to fabricate high-quality poly[2-(dimethylamino)ethyl methacrylate-co-ethylene dimethacrylate] (PDMAEMA-EDMA) nanogel. We successfully found that dispersion polymerization in water/2-methoxyethanol medium (80/20 w/w), initiated with 0.2 wt% potassium persulfate (KPS) and stabilized with 0.5 wt% poly(vinyl alcohol) (PVA), produced a well-defined and sub-micron 167 nm PDMAEMA-EDMA nanogel. Bactericidal activity of the quaternized PDMAEMA-EDMA nanogel was assessed via time-kill curve assay against two Gram-positive and Gram-negative pathogenic bacteria, namely Staphylococcus aureus (S. aureus) and Acinetobacter baumannii (A. baumannii). The results illustrated that the quaternized PDMAEMA-EDMA nanogel acted as an effective bactericidal agent against both tested bacteria.
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Affiliation(s)
- Petr Šálek
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic Heyrovského nám. 2 162 06 Prague 6 Czech Republic
| | - Jiří Trousil
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic Heyrovského nám. 2 162 06 Prague 6 Czech Republic
| | - Jitka Nováčková
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic Heyrovského nám. 2 162 06 Prague 6 Czech Republic
| | - Jiřina Hromádková
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic Heyrovského nám. 2 162 06 Prague 6 Czech Republic
| | - Andrii Mahun
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic Heyrovského nám. 2 162 06 Prague 6 Czech Republic .,Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University Hlavova 8 128 40 Prague 2 Czech Republic
| | - Libor Kobera
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic Heyrovského nám. 2 162 06 Prague 6 Czech Republic
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Zhang X, Zhang F, Zhang W, Tang X, Fan HS. Enhance the interaction between ammonium polyphosphate and epoxy resin matrix through hydrophobic modification with cationic latex. Colloids Surf A Physicochem Eng Asp 2021; 610:125917. [DOI: 10.1016/j.colsurfa.2020.125917] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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5
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Liu B, Xu X, Zhang M, Ao Y, Zhang H. Synthesis of Sub-100 nm and Narrow Particle Size Distribution Cationic Latex by One-Step Emulsion Polymerization. J DISPER SCI TECHNOL 2016. [DOI: 10.1080/01932691.2015.1026974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Killops KL, Brucks SD, Rutkowski KL, Freyer JL, Jiang Y, Valdes ER, Campos LM. Synthesis of Robust Surface-Charged Nanoparticles Based on Cyclopropenium Ions. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00403] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Kato L. Killops
- US Army Edgewood
Chemical Biological Center, Aberdeen Proving
Ground, Maryland 21010, United States
| | - Spencer D. Brucks
- Department
of Chemistry, Columbia University, New York, New York 10027, United States
| | - Kourtney L. Rutkowski
- Oak Ridge
Institute
for Science and Education, Oak Ridge, Tennessee 37831, United States
| | - Jessica L. Freyer
- Department
of Chemistry, Columbia University, New York, New York 10027, United States
| | - Yivan Jiang
- Department
of Chemistry, Columbia University, New York, New York 10027, United States
| | - Erica R. Valdes
- US Army Edgewood
Chemical Biological Center, Aberdeen Proving
Ground, Maryland 21010, United States
| | - Luis M. Campos
- Department
of Chemistry, Columbia University, New York, New York 10027, United States
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Abstract
A layer-by-layer (LbL) synthesis of mechanically robust micrometer-diameter nanoshell silica was developed. Silica was templated onto polstyrene latex particles using a modified Stöber synthesis. Each subsequent silica layer was deposited after adsorbing cationic polymer poly(allylamine) hydrochloride. The silica shell grew approximately 30 nm for each reaction step. The polystyrene-silica core-shell particles were calcined at 500 °C to remove the latex core. The synthesis was adapted to nonspherical shapes using anisotropic polystyrene dicolloids as templates. The silica nanoshells were functionalized to render them organophilic or fluorescent. The rates at which water, ethanol, and aqueous sucrose solution (60% w/w) permeate the silica shells were compared using spectrophotometry and conductivity measurements. The rate of solvent uptake ranged between under 1 h to over 1 week depending on the surface chemistry of the nanoshells.
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Affiliation(s)
- Kathryn A Whitaker
- Department of Chemical and Biomolecular Engineering and Center for Molecular & Engineering Thermodynamics, Allan P. Colburn Laboratory, University of Delaware , 150 Academy Street, Newark, Delaware 19716, United States
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Ramos J, Forcada J, Hidalgo-Alvarez R. Cationic Polymer Nanoparticles and Nanogels: From Synthesis to Biotechnological Applications. Chem Rev 2013; 114:367-428. [DOI: 10.1021/cr3002643] [Citation(s) in RCA: 144] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Jose Ramos
- POLYMAT,
Bionanoparticles Group, Departamento de Química Aplicada, UFI
11/56, Facultad de Ciencias Químicas, Universidad del País Vasco UPV/EHU, Apdo. 1072, 20080 Donostia-San
Sebastián, Spain
| | - Jacqueline Forcada
- POLYMAT,
Bionanoparticles Group, Departamento de Química Aplicada, UFI
11/56, Facultad de Ciencias Químicas, Universidad del País Vasco UPV/EHU, Apdo. 1072, 20080 Donostia-San
Sebastián, Spain
| | - Roque Hidalgo-Alvarez
- Grupo
de Física de Fluidos y Biocoloides, Departamento de Física
Aplicada, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain
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Abstract
A series of novel polyacid macromonomers based on 2-hydroxypropyl methacrylate (HPMA) were prepared by atom transfer radical polymerization (ATRP) via a two-step route. First, a range of well-defined PHPMA homopolymer precursors were synthesized by ATRP using a tertiary amine-functionalized initiator, 2-(dimethylamino)ethyl-2-bromoisobutyrylamide, and a CuCl/2, 2'-bipyridine (bpy) catalyst in alcoholic media at 50 °C. ATRP polymerizations were relatively slow and poorly controlled in pure isopropanol (IPA), especially when targeting higher degrees of polymerization (DP > 30). Improved control was achieved by addition of water: low polydispersity (M(w)/M(n) < 1.25) PHPMA homopolymers of DP = 30, 40, 50, 60, or 70 were successfully prepared using a 9:1 w/w % IPA/water mixture at 50 °C. These PHPMA homopolymer precursors were then derivatized to produce the corresponding poly(2-(succinyloxy)propyl methacrylate) (PSPMA) macromonomers by quaternizing the tertiary amine end-group with excess 4-vinylbenzyl chloride, followed by esterification of the pendent hydroxyl groups using excess succinic anhydride at 20 °C. These polyacid macromonomers were evaluated as reactive steric stabilizers for polystyrene latex synthesis under either aqueous emulsion polymerization or alcoholic dispersion polymerization conditions. Near-monodisperse polystyrene latexes were obtained via aqueous emulsion polymerization using 10 wt % PSPMA macromonomer (with respect to styrene monomer) with various initiators as evidenced by scanning electron microscopy, disk centrifuge photosedimentometry and light scattering studies. PSPMA macromomer concentrations as low as 1.0 wt % also produced near-monodisperse latexes, suggesting that these PSPMA macromonomers are highly effective stabilizers. Alcoholic dispersion polymerization of styrene conducted in various ethanol/water mixtures with 10 wt % PSPMA(50) macromonomer produced relatively large near-monodisperse latexes. Increasing the water content in such formulations led to smaller latexes, as expected. Control experiments conducted with 10 wt % PSPMA(50) homopolymer produced relatively large polydisperse latexes via emulsion polymerization and only macroscopic precipitates via alcoholic dispersion polymerization. Thus the terminal styrene group on the macromonomer chains is essential for the formation of well-defined latexes. FT-IR spectroscopy indicated that these latexes contained PSPMA macromonomer, whereas (1)H NMR spectroscopy studies of dissolved latexes allowed stabilizer contents to be determined. Aqueous electrophoresis and X-ray photoelectron spectroscopy studies confirmed that the PSPMA macromonomer chains were located at the latex surface, as expected. Finally, these polyacid-stabilized polystyrene latexes exhibited excellent freeze-thaw stability and remained colloidally stable in the presence of electrolyte.
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Affiliation(s)
- Pengcheng Yang
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, United Kingdom
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Liu Q, Li Y, Duan Y, Zhou H. Research progress on the preparation and application of monodisperse cationic polymer latex particles. POLYM INT 2012. [DOI: 10.1002/pi.4347] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Rousseau G, Fensterbank H, Baczko K, Cano M, Allard E, Larpent C. Azido-Coated Nanoparticles: A Versatile Clickable Platform for the Preparation of Fluorescent Polystyrene Core–PAMAM Shell Nanoparticles. Macromolecules 2012. [DOI: 10.1021/ma300126h] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Guillaume Rousseau
- Institut Lavoisier de Versailles
UMR-CNRS 8180, Université de Versailles-Saint-Quentin-en-Yvelines, 45 avenue des Etats-Unis, 78035 Versailles cedex, France
| | - Hélène Fensterbank
- Institut Lavoisier de Versailles
UMR-CNRS 8180, Université de Versailles-Saint-Quentin-en-Yvelines, 45 avenue des Etats-Unis, 78035 Versailles cedex, France
| | - Krystyna Baczko
- Institut Lavoisier de Versailles
UMR-CNRS 8180, Université de Versailles-Saint-Quentin-en-Yvelines, 45 avenue des Etats-Unis, 78035 Versailles cedex, France
| | - Manuel Cano
- Institut Lavoisier de Versailles
UMR-CNRS 8180, Université de Versailles-Saint-Quentin-en-Yvelines, 45 avenue des Etats-Unis, 78035 Versailles cedex, France
| | - Emmanuel Allard
- Institut Lavoisier de Versailles
UMR-CNRS 8180, Université de Versailles-Saint-Quentin-en-Yvelines, 45 avenue des Etats-Unis, 78035 Versailles cedex, France
| | - Chantal Larpent
- Institut Lavoisier de Versailles
UMR-CNRS 8180, Université de Versailles-Saint-Quentin-en-Yvelines, 45 avenue des Etats-Unis, 78035 Versailles cedex, France
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Zou D, Li X, Zhu X, Kong X. Preaparation of cationic latexes of poly(styrene-CO-butyl acrylate) and their properties evolution in latex dilution. Chin J Polym Sci 2012; 30:278-86. [DOI: 10.1007/s10118-012-1113-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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13
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Liu Q, Li Y, Shen S, Zhou Z, Ou B, Tang S. Preparation of Monodisperse Cationic Microspheres by Dispersion Polymerization of Styrene and a Cation-Charged Monomer in the Absence of a Stabilizer. Journal of Macromolecular Science, Part A 2011. [DOI: 10.1080/10601325.2011.579810] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Niikura K, Nambara K, Okajima T, Kamitani R, Aoki S, Matsuo Y, Ijiro K. Artificial polymeric receptors on the cell surface promote the efficient cellular uptake of quantum dots. Org Biomol Chem 2011; 9:5787-92. [DOI: 10.1039/c1ob05420a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Badila M, Brochon C, Hébraud A, Hadziioannou G. Encapsulation of TiO2 in poly(4-vinyl pyridine)-based cationic microparticles for electrophoretic inks. POLYMER 2008. [DOI: 10.1016/j.polymer.2008.07.041] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Larpent C, Cannizzo C, Delgado A, Gouanvé F, Sanghvi P, Gaillard C, Bacquet G. Convenient synthesis and properties of polypropyleneimine dendrimer-functionalized polymer nanoparticles. Small 2008; 4:833-840. [PMID: 18528853 DOI: 10.1002/smll.200701200] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A simple synthesis of polymer core-dendrimer shell nanoparticles (NPs) in the 15-20-nm-diameter range is presented. Amine-terminated polypropyleneimine (PPI) dendrimers DAB-dendri-(NH(2))(4) and DAB-dendri-(NH(2))(16) (DAB4 and DAB16) are covalently attached to the surface of primary polystyrene-based NPs bearing reactive chlorobenzyl groups produced by microemulsion polymerization in the presence of a cationic surfactant. The grafting readily proceeds under mild conditions and leads to translucent aqueous suspensions of core-shell-type NPs with a high density of peripheral amine groups that have been characterized relative to their size and chemical composition. The dendritic shell acts as a protective ionizable outer layer and provides an improvement of the colloidal stability in neutral and acidic media. The metal-binding capacity of the PPI dendrimers is retained, and spectrophotometric titrations show that the dendrimer-grafted NPs can trap a large number of Cu(2+) ions (more than 900 Cu per NP-DAB16). These properties make them potentially valuable templates for the elaboration of hybrid nanomaterials. The reactivity of the external amine groups is used to link covalently azobenzene chromophores (disperse Red 1 residues) through aza-Michael addition in aqueous suspension. This simple method gives access to colored NPs with high dye contents in the outer layer (up to 1000-1500 dye molecules per NP), which indicates that dendrimer-functionalized NPs are valuable building blocks for the construction of multifunctional nanomaterials.
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Affiliation(s)
- Chantal Larpent
- Institut Lavoisier UMR-CNRS 8180, Université de Versailles-Saint-Quentin-en-Yvelines, 45 Avenue des Etats-Unis, 78035 Versailles Cedex, France.
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Abstract
We describe the facile production of highly stable foams stabilized solely by cationic polystyrene latex particles. Three model polystyrene latexes were synthesized using either a cationic 2,2'-azobis(2-diisobutyramidine) dihydrochloride (AIBA) or an anionic ammonium persulfate (APS) radical initiator: a 724 +/- 81 nm charge-stabilized cationic polystyrene latex [AIBA-PS], an 800 +/- 138 nm sterically stabilized cationic latex prepared using a poly(ethylene glycol) monomethacrylate macromonomer [PEGMA-AIBA-PS], and a 904 +/- 131 nm charge-stabilized anionic polystyrene latex [APS-PS], respectively. The effect of particle surface charge, latex concentration, and solution pH on foam stability was studied in detail. The PEGMA-AIBA-PS latex proved to be the best foam stabilizer even at relatively low latex concentrations (3.0 wt %), with long-term foam stabilities being obtained after drying. The AIBA-PS latex also produced stable foams, albeit only at higher latex concentrations. However, the APS-PS latex proved to be an ineffective foam stabilizer. This is believed to be primarily due to the anionic surface character of this latter latex, which prevents its adsorption at the anionic air-water interface. This hypothesis is supported by the observation that the AIBA-PS latex no longer acts as an effective foam stabilizer above its isoelectric point (pH 7.04). Scanning electron microscopy studies revealed the formation of well-defined latex bilayers within dried foams, which indicates that the wet air bubbles are stabilized by latex monolayers prior to drying. However, little or no long-range ordering of the latex particles was observed on the surface of the bubbles, which is presumably related to the latex polydispersity.
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Affiliation(s)
- Sarah L Kettlewell
- Department of Chemistry, Dainton Building, University of Sheffield, Brook Hill, Sheffield, South Yorkshire, S3 7HF, United Kingdom
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Voorn D, Ming W, Laven J, Meuldijk J, de With G, van Herk A. Plate–sphere hybrid dispersions: Heterocoagulation kinetics and DLVO evaluation. Colloids Surf A Physicochem Eng Asp 2007. [DOI: 10.1016/j.colsurfa.2006.08.022] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Abstract
We describe a promising and flexible technique for fabricating uniform nonspherical particles with anisotropic phase and surface properties. Our approach is based on the seeded polymerization technique in which monomer-swollen particles are polymerized. The polymerization causes a phase separation to occur, giving rise to two-phase nonspherical particles. We show that the elastic contraction of the swollen polymer particles induced by elevated polymerization temperatures plays an important role in the phase separation. Moreover, chemical anisotropy of nonspherical particles can be obtained by using immiscible polymer pairs and by employing surface treatments. Furthermore, we are able to produce amphiphilic dumbbell particles consisting of two different bulbs: hydrophilic poly (ethylene imine)-coated polystyrene and hydrophobic polystyrene. Controlled geometries of these amphiphilic nonspherical particles will allow a wide range of potential applications, such as engineered colloid surfactants.
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Affiliation(s)
- Jin-Woong Kim
- Division of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA
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Watanabe M, Kawaguchi S, Nagai K. Self-organization of polymer particles on hydrophobic solid substrates in aqueous media. I. Self-organization of cationic polymer particles on alkylated glass plates. Colloid Polym Sci 2006. [DOI: 10.1007/s00396-006-1567-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Voorn DJ, Ming W, van Herk AM, Bomans PHH, Frederik PM, Gasemjit P, Johanssmann D. Controlled heterocoagulation of platelets and spheres. Langmuir 2005; 21:6950-6. [PMID: 16008408 DOI: 10.1021/la050605e] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
We report the controlled heterocoagulation of platelets and spheres, leading to the formation of colloidally stable, anisotropic hybrid particles. Anionically charged, nanosized polymer latex spherical particles were heterocoagulated on the surface of cationically charged hexagonal gibbsite platelets via the adsorption of a single layer of spheres onto both sides of the hexagonal platelets. The latex particles were annealed at a temperature above the Tg of the latex polymer, resulting in a thin polymer layer covering the gibbsite platelets. This heterocoagulation approach enabled the encapsulation of hydrophilic inorganic particles with polymer latexes and the formation of anisotropic hybrid particles.
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Affiliation(s)
- D J Voorn
- Laboratories of Polymer Chemistry and of Materials and Interface Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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