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Methanol tolerant electrocatalysts for the oxygen reduction reaction
(Springer, 2015)Direct methanol fuel cells (DMFCs) represent an interesting alternative in obtaining electricity in a clean and efficient way. Portable power sources are one of the most promising applications of passive DMFCs. One of the ... -
Morphology and properties of neutralized chitosan-cellulosenanocrystals biocomposite films
(2016)Chitosan/cellulose nanocrystals (CH-CN) films were obtained by casting of dispersions, and treated with NaOH for neutralization proposes. The composition of films was varied from 1 to 10 wt.% of CN. Changes in the morphology ... -
Nanopinturas híbridas acuosas para la protección de fachadas
(Atipat, 2015-08-01)Las fachadas de edificios, a pesar de su aparente resistencia, son vulnerables a los agentes exteriores y necesitan una protección eficaz contra la acción del medio externo. Usualmente en una primera etapa se aplican ... -
On the strategies for incorporating nanosilica aqueous dispersion in the synthesis of waterborne polyurethane silica nanocomposites, Effects on morphology and properties
(2016)In this work the synthesis of waterborne polyurethane/nanosilica nanocomposites by using two differ- ent strategies is presented, starting from a vinyl terminated polyurethane prepolymer (PUP) based on isophorone diisocyanate ... -
Phase transformation during the zeolitization of fly ashes
(Elsevier, 2017)The reactivity of a fly ash discarded from a thermoelectric power station was evaluated in terms of its hydrothermal conversion into NaA-containing products. The influence of ash pretreatments and the effect of changes ... -
Pinturas anticorrosivas epoxídicas basadas en zinc esférico y zinc laminar
(Atipat, 2017-08-01)Como resulta conocido, la partículas de zinc esférico transportan la corriente protectora entre dos partículas adyacentes en forma tangencial; consecuentemente el contacto es limitado. Con el fin de asegurar un denso ... -
Pinturas basadas en resina epoxi alifática curada con alcoxisilanos para la protección de sustratos metálicos
(Atipat, 2014-05-01)La presente investigación involucró el diseño de pinturas de altos sólidos, de aplicación en una sola capa, destinadas a la protección de construcciones metálicas con necesidades de mínimo mantenimiento y alta durabilidad; ... -
Pinturas híbridas de terminación sobre fondos anticorrosivos de zinc modificados
(Atipat, 2013-10-01)Las pinturas basadas en zinc metálico presentan una mayor eficiencia contra la corrosión en relación con otros recubrimientos. Sin embargo, éstas necesitan generalmente una pintura de terminación ya sea para conferirle al ... -
Polyurethane Poly(2-(Diethyl Amino)Ethyl Methacrylate) blend for drug delivery applications
(2015)A pH-sensitive blend of polyurethane (PU) and poly(2-(diethyl amino)ethyl methacrylate (PDEA) with good film-forming capacity was prepared from the corresponding aqueous dispersions. The polymer matrix was first characterized ... -
Preparation and characterization of graphite anodes for lithium ion batteries
(The Electrochemical Society, 2014)The lithium-ion batteries are energy storage systems of high performance and low cost. They are employed in multiple portable devices and these require the use of increasingly smaller and lighter batteries with high energy ... -
Preparation and characterization of positive electrode of NiMH batteries with cobalt additives
(Elsevier, 2014-02-18)The present paper shows the preparation and characterization of alkaline batteries cathodes formed by nickel hydroxide with the addition of cobalt. This additive was incorporated by two methods: on the electrode surface, ... -
Preparation and evaluation of carbon supported catalysts for ethanol oxidation
(Springer, 2013)Supported PtSnIr/C, PtSn/C, and IrSn/C catalysts with potential application in a direct alcohol fuel cell were prepared by chemical reduction employing Pechini methodology. The catalyst particles were characterized by ... -
Research on methanol tolerant catalysts for the oxygen reduction reaction
(Springer, 2015)Direct methanol fuel cells (DMFCs) generate electricity in a clean and efficient way, so they are a valuable alternative to traditional environmentally harmful technologies. Portable power sources are one of the applications ... -
Searching for suitable catalysts for a passive direct methanol fuel cell cathode
(Elsevier, 2015)Trimetallic PtMRu/C cathode catalysts with M ¼ Co or Fe obtained by an impregnation procedure using ethylene glycol and NaBH4 as reducing agent, with suitable activity for the oxygen reduction reaction (ORR) and improved ... -
Siloxanes synthesized in situ by solgel process for fire control in wood of Araucaria angustifolia
(Elsevier, 2013-10-10)Panels of Araucaria angustifolia were chemically modified with alkoxysilanes, hydrolyzed and condensed “in situ” by the sol–gel process. Alkoxysilanes selected were aminopropyl methyldiethoxysilane (A), aminopropyl ... -
Síntesis de nano catalizadores para celdas de combustible de metanol directo
(Revista Tecnología y Ciencia UTN, 2014)Las celdas de combustible de metano/ directo, DMFCs, permiten una conversión completa de la energía de la reacción química (CH)3OH(ac)+3/2 O2(g)=7CO2(g)+2H2O(l) en energía eléctrica. El platino es el catalizador más utilizado ... -
Starch Polyvinyl Alcohol blends containing Polyurethane as plasticizer
(2016)Starch-based films containing 70wt% of starch and a combination of poly(vinyl alcohol) and a low glass transition temperature polyurethane as plasticizer were prepared. The effect of PVA/PU ratio content on the morphology ... -
Surface, thermal, and mechanical properties of composites and nanocomposites of polyurethane PTFE nanoparticles
(2014)Films from blends of polyurethane and nano-polytetrafluoroethylene aqueous dispersions (PU/nanoPTFE) were prepared, and the effect of the addition of different amounts of PTFE nanoparticles (50 nm) was studied. The changes ... -
Synthesis and swelling behavior of pH-responsive polyurethane poly(2-(diethylamino)ethyl methacrylate) hybrid materials
(2013)Polyurethane (PU)/poly[2-(diethylamino)ethyl methacrylate] hybrids, having a chemical bond between the PU and acrylic moieties and with different compositions, were prepared by the dispersion polymerization of 2-(diethyl ... -
Synthesis, characterization and swelling behavior of new pH-sensitive hydrogels derived from copolymers of 2-hydroxyethyl methacrylate and 2-(diisopropylamino) ethylmethacrylate
(2012)The aim of this work was to synthesize and to characterize new pH-sensitive hydrogels that can be used in the controlled release of drugs, useful for dermal treatments or ophthalmology’s therapies. Copolymers containing ...