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Radical Polymerization of Alkali Acrylates in Aqueous Solution

29-Apr-2015 | P. Drawe, M. Buback, I. Lacík, Macromolecular Chemistry and Physics, 2015

Monomer conversion versus time profiles for the radical polymerization of ionized acrylic acid (AA), 0.6 to 0.8 mol L−1 in aqueous solution, are measured at 50 °C via inline near‐infrared spectroscopy mostly on fully ionized AA, i.e., of alkali acrylates. Ionization reduces polymerization rate ...


Transverse migration of polyelectrolytes in microfluidic channels induced by combined shear and electric fields

28-Apr-2015 | Mert Arca; Jason E. Butler; Anthony J. C. Ladd, Soft Matter, 2015

If a dilute solution of a polyelectrolyte such as DNA is forced through a microcapillary by an electric field, while simultaneously driven by a pressure gradient, then the polymer will migrate in directions transverse to the field lines. Here we investigate the sharp increase in concentration in ...


Effect of Fabricating Parameters on Morphology and Photocatalytic Performance of CdS NCs/TiO2 NTs Photoelectrode for Decomposition of Organic Pollutants

27-Apr-2015 | Xiuwen Cheng, Guoping Pan, Xiujuan Yu, Advanced Engineering Materials, 2015

CdS NCs/TiO2 NTs photoelectrode was fabricated through anodization, followed by electrodeposition strategy. Meanwhile, some critical parameters were optimized through morphologies observation and photocatalytic decomposition of rhodamine B (RhB). It was found that the optimized deposited ...


Interactions between nanoparticles and lung surfactant investigated by matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry

24-Apr-2015 | Tashi Chhoden, Per Axel Clausen, Søren T. Larsen, Asger W. Nørgaard, Frants R. Lauritsen, Rapid Communications in Mass Spectrometry, 2015

Rationale Inhaled nanoparticles may cause adverse effects due to inactivation of lung surfactants. We have studied how three different nanoparticles interact with dipalmitoyl‐phosphatidylcholine (DPPC), the main component in lung surfactant. Methods DPPC in solution was mixed with a ...


Micelle Structure in a Photoresponsive Surfactant with and without Solubilized Ethylbenzene from Small-Angle Neutron Scattering

24-Apr-2015 | Masaaki Akamatsu; Paul A. FitzGerald; Mayu Shiina; Takeshi Misono; Koji Tsuchiya; Kenichi Sakai; Masahiko Abe; Grego ..., Journal of Physical Chemistry B, 2015

Photoresponsive micellar systems of 4-butylazobenzene-4′- (oxyethyl)trimethylammonium bromide (AZTMA) were examined with and without ethylbenzene using small-angle neutron scattering (SANS). Analysis of SANS profiles showed that an aqueous solution containing 5, 10, and 50 mM AZTMA forms prolate ...


Immobilization of Distinctly Capped CdTe Quantum Dots onto Porous Aminated Solid Supports

23-Apr-2015 | S. Sofia M. Rodrigues, David S. M. Ribeiro, Christian Frigerio, Susana P. F. Costa, João A. V. Prior, Paula C. A. G. ..., ChemPhysChem, 2015

Abstract Immobilization of quantum dots (QDs) onto solid supports could improve their applicability in the development of sensing platforms and solid‐phase reactors by allowing the implementation of reusable surfaces and the execution of repetitive procedures. As the reactivity of QDs relies ...


Effect of ionic strength on bubble coalescence in inorganic salt and seawater solutions

23-Apr-2015 | J.M. Sovechles, K.E. Waters, AIChE Journal, 2015

ABSTRACT Bubble size is of fundamental importance in the flotation process, as it provides the surface area for particle collection. Typically weak surfactants (frothers) are added to process water to reduce bubble coalescence. Certain inorganic electrolytes, which occur naturally in some ...


Resorcinol‐formaldehyde xerogel as a micro‐solid‐phase extraction sorbent for the determination of herbicides in aquatic environmental samples

22-Apr-2015 | Ali Es‐haghi, Maryam Zare, Hamed Piri‐Moghadam, Habib Bagheri, Journal of Separation Science, 2015

In this study, organic aerogels were synthesized by the sol–gel polycondensation of mixed cresol with formaldehyde in a slightly basic aqueous solution. Carbon aerogels and xerogels are generated by pyrolysis of organic aerogels. The novel sol–gel based micro‐solid‐phase extraction sorbent, ...


Preparation of Gallium Sulfide Nanosheets by Liquid Exfoliation and Their Application As Hydrogen Evolution Catalysts

21-Apr-2015 | Andrew Harvey; Claudia Backes; Zahra Gholamvand; Damien Hanlon; David McAteer; Hannah C. Nerl; Eva McGuire; Andrés S ..., Chemistry of Materials, 2015

Here, we demonstrate the production of large quantities of gallium sulfide (GaS) nanosheets by liquid exfoliation of layered GaS powder. The exfoliation was achieved by sonication of the powder in suitable solvents. The variation of dispersed concentration with solvent was consistent with ...


Effect of NaCl concentration, pH value and tensile stress on the galvanic corrosion behavior of 5050 aluminum alloy

20-Apr-2015 | T.F. Cui, D.X. Liu, P.A. Shi, J.J. Liu, Y.H. Yi, H.L. Zhou, Materials and Corrosion, 2015

The effects of NaCl concentration, solution pH value and tensile stress on galvanic corrosion behavior of 5050 aluminum alloy coupled to 45 steel were investigated using a zero resistance ammeter. The influence and mechanism of various factors in the galvanic corrosion process were studied ...


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