The Use of Poly(2-acrylamido-2-methyl-1-propanesulfonic Acid) Polymers as Spacers for Isotachophoresis in Sieving Gel Matrices

Bellini, Marco P.; Manchester, Keith

doi:10.1006/abio.1998.2979

Cited by 6 publications

(4 citation statements)

References 21 publications

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“…Indeed PAMPS is widely used as an ion exchange resin, flocculant, dispersant, adhesive, thickener, and component of cross-linked polymer blend membranes. 19 It finds also many topical applications as a proton conducting polymer electrolyte, 20 as well as a spacer in isotachophoresis for the separation of biomolecules in sieving gel matrices, 21 as a polychelatogen for ultrafiltration applications, 22 as an anionic fluid loss additive 23 or in some biomedical applications of hydrogels for production of artificial organs with sufficient lubrication due to its low surface friction. 24 Additionally PAMPS, like other polymers such as perfluorosulfonate (NAFION), is known as a functionalized polymer electrolyte, also called a polymeric dopant, and thus maybe of interest as an additive for CTN applications.…”

Section: Introductionmentioning

confidence: 99%

Percolation network of organo-modified layered double hydroxide platelets into polystyrene showing enhanced rheological and dielectric behavior

et al. 2010

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International audienceA hybrid organic inorganic layered double hydroxide incorporating 2-acrylamido-2-methyl-1-propane sulfonic acid (AMPS) is characterized by means of XRD, FTIR, and XPS. The in situ polymerization is scrutinized by 13C CPMAS as well as by a set of XRD experiments with varying temperature. It is found that the in situ polymerization is complete at 200 °C, and the hybrid framework sustains temperatures as high as 350 °C. Direct incorporation of poly(AMPS) is reported and the resulting hybrid LDH phases studied. Subsequently, all generated hybrid platelets are used as organo-modified 2D-type filler dispersed into polystyrene (PS). An immiscible PS composite structure with salient gel-like viscoelastic properties is obtained after bulk polymerization. In the low-frequency region, the typical Newtonian flow behaviour of PS is found to change progressively against filler loading into a shear-thinning behaviour evidenced by a pseudo-plateau in the elastic and loss modulus curves and associated with a shift of the glass transition temperature of PS to higher temperature. It is interpreted by hybrid LDH platelet domains presenting a large interface with the polymer, thus having the effect of restricting the plastic deformation by obstructing polymer chain motion. Such dispersed hybrid LDH tactoids forming a three-dimensional percolated network are indirectly evidenced by the enhancement of the dielectric properties illustrated by an increase in bulk dc conductivity of about one order at room temperature and in the dissipation factor. The study shows that hybrid LDH assembly is of relevance in topical applications regarding mechanical reinforcement as well as electrostatic energy dissipation. © 2010 The Royal Society of Chemistry

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Section: Introductionmentioning

confidence: 99%

Percolation network of organo-modified layered double hydroxide platelets into polystyrene showing enhanced rheological and dielectric behavior

et al. 2010

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“…This nanoparticle, abbreviated SO3-MPC, bears ligands of 3-thiolatopropanamido-2-methyl-1-propanesulfonic acid that are incorporated onto its surface by reactions of the Bunte (thiosulfate) salt of 2-acrylamido-2-methyl-1-propanesulfonic acid. (The polymeric form of this precursor is well-known in biological and polymeric chemistry, − for electrophoresis, chromatography, biological responses, , etc.) The anionic SO3-MPC nanoparticles are combined with a polyether-tailed ammonium cation to produce a nanoparticle-containing, ionically conductive molten salt.…”

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confidence: 99%

Water-Soluble, Sulfonic Acid-Functionalized, Monolayer-Protected Nanoparticles and an Ionically Conductive Molten Salt Containing Them

2001

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Sulfonic acid-functionalized monolayer-protected gold clusters (SO3-MPCs) have been synthesized by the reaction of the Bunte (thiosulfate) salt of 2-acrylamido-2-methyl-1-propanesulfonic acid (SO3) with tetrachloroaurate and borohydride in aqueous acetic acid. The nanoparticles produced have an average core diameter, obtained by transmission electron microscopy (TEM), of 2.2 ( 1.1 nm, and a 30 wt % ligand content, obtained by thermogravimetric analysis. These parameters, assuming an ideal closed-shell truncated octahedral nanoparticle, correspond to an average nanoparticle formula of Au314SO3111. Proton NMR, Fourier transform infrared (FTIR), and UV/vis spectroscopies are consistent with nanoparticle formation, and acid/base titrations are consistent with the strong acid character of the SO3-MPC monolayer. These nanoparticles add to a growing family of water-soluble MPCs. Synthesis of a salt of SO3-MPC with a polyether-tailed triethylammonium countercation yields an ionically conductive molten salt, which is studied by alternating current impedance spectroscopy in the solid state (neat melt) and solution form.Monolayer-protected gold clusters (MPCs) are becoming recognized for their diverse chemical and physical properties 1-5 and properties potentially relevant to nanoscale electronic devices, optic devices, magnetic materials, multifunctional catalysts, chemical recognition, and biosensors, 1,6-10 among others. Since Brust et al. 2a described the synthesis of isolable, stable, alkanethiolatepassivated gold nanoparticles, such nanoparticles have been functionalized by simple chemical transformations, 2-5,11-14 with a wide variety of structural units, including aromatic thiolates, 2b,11-13 ω-substituted alkanethiolates, 14a and polyhetero-ω-functionalized alkanethiolates. 14b These materials exhibit solubility in organic solvents of polarity correlated with that of the monolayers but lack water solubility, which is desirable for a variety of purposes including use in conjunction with biological systems. 15 Progress in designing water-soluble MPCs has been steady over the past several years and now includes MPCs with monolayers of tiopronin, 16a,b poly(ethylene glycol), 16c glutathione, 17 4-hydroxythiophenol, 2b,13b mercaptobenzoic acid, 11b and mercaptosuccinic acid. 18 Solubilities of 4-hydroxythiophenol, mercaptobenzoic acid, and mercaptosuccinic acid functionalized clusters are both limited and pH-dependent. Tiopronin [N-(2-mercaptopropionyl)glycine] and glutathione MPCs are freely water-soluble and the former additionally has been further functionalized by ligand place exchange and by amide coupling reactions of its carboxylic acid groups. 16b Small Au 55 clusters with strong acid ligands (Au 55 [PPh 2 C 6 H 4 SO 3 H]Cl 6 ) have been reported. 19 There has, however, been no well-characterized MPC reported with strong acid-functionalized thiolate ligand monolayers.In the field of molten salts known as polymer electrolytes, it is understood 20 that solid-state cation conductivity (1) (a) Schon, G.; Simon, U. C...

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“…We designed pAMPS* to contain only one surface anchoring group (catechol end-group) per chain to prevent multiparticle entanglement. pAMPS* contains a high density of SO 3 – groups on a polymer backbone resulting in steric, osmotic, and electrostatic repulsions, which in turn lead to stabilization of the SPIONs against aggregation . This proposition is validated with calculations that establish a theoretical estimate for the critical surface density.…”

Section: Introductionmentioning

confidence: 69%

Effect of Polymer Surface Modification of Superparamagnetic Iron Oxide Nanoparticle Dispersions in High Salinity Environments

Nap

Szleifer

et al. 2019

Langmuir

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Superparamagnetic nanoparticles (SPIONs) can be used as nuclear magnetic resonance (NMR) signal enhancement agents for petroleum exploration. This enhancement effect is uniform if SPIONs are monodisperse in size and in composition; yet it is challenging to synthesize monodisperse particles that do not aggregate in high salinity petroleum brine. Here, we report a method to synthesize individual SPIONs coated with tunable surface coating densities of poly(2-acrylamido-2-methyl-1-propanesulfonic acid (pAMPS) with a catechol end-group (pAMPS*). To establish parameters under which pAMPS*-coated SPIONS do not aggregate, we compared computational predictions with experimental results for variations in pAMPS* chain length and surface coverage. Using this combined theoretical and experimental approach, we show that singly dispersed SPIONs remained stabilized in petroleum brine for up to 75 h with high surface density pAMPS*.

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The Use of Poly(2-acrylamido-2-methyl-1-propanesulfonic Acid) Polymers as Spacers for Isotachophoresis in Sieving Gel Matrices

Cited by 6 publications

References 21 publications

Percolation network of organo-modified layered double hydroxide platelets into polystyrene showing enhanced rheological and dielectric behavior

Percolation network of organo-modified layered double hydroxide platelets into polystyrene showing enhanced rheological and dielectric behavior

Water-Soluble, Sulfonic Acid-Functionalized, Monolayer-Protected Nanoparticles and an Ionically Conductive Molten Salt Containing Them

Effect of Polymer Surface Modification of Superparamagnetic Iron Oxide Nanoparticle Dispersions in High Salinity Environments

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