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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 ... -
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 ... -
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 ... -
Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by solegel process
(Elsevier, 2013-05-16)Solid wood specimens of Araucaria angustifolia were impregnated with alkoxysilanes hydrolyzed and condensed “in situ” by the solegel process. Alkoxysilanes selected were aminopropyl methyldiethoxysilane and aminopropyl ... -
Hybrid finishing coatings applied on laminar zinc primers
(American Chemical Society, 2013-05-29)Hybrid finishing coatings were formulated with several film-forming materials and reinforcement fibers. In all cases, the same tri-pigmented epoxy-polyamide coating based on laminar zinc was used as primer. The results ... -
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 ... -
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 ... -
Dimensional stability, fire performance and decay resistance in wood impregnated with alkylalkoxysilanes
(2013-11-20)The wood, very heterogeneous and complex material, changes its volume by water absorption or desorption causing swelling or shrinkage and also it can be degraded both by action of microorganisms and fire; the above-mentioned ... -
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 ... -
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 ... -
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 ... -
Effect of antioxidant active films on the oxidation of soybean oil monitored by Fourier transform infrared spectroscopy
(2014)An active film prepared from waterborne polyurethane incorporated with different concentrations of butylated hydroxytoluene (BHT) and a-tocopherol was developed, and the films’ antioxidant character- istics were studied ... -
Adherence in a pavement rehabilitated with a polymeric grid used as interlayer
(Elsevier, 2014-01-02)A polymeric grid was placed between layers of a pavement with the aim of preventing the reflection of cracks from the base material to the upper layer. Results explain why the usual faults that occur in rehabilitated ... -
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, ... -
Effect of cobalt electroless deposition on nickel hydroxide electrodes
(Elsevier, 2014-02-21)The effects of cobalt additive on the positive electrode surface of nickel alkaline batteries are investigated. Electrode surface modifications by electroless cobalt deposits were made at different immersion times. The ... -
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; ... -
High solids, one coat paints based on aliphatic epoxi resin siloxanes for steel protection
(Elsevier, 2014-05-01)This research involved the design of high-solids, one-coat paints for the protection of metal structures with low maintenance requirements. The main paint components were: (i) an aliphatic epoxy resin cured with an ... -
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 ... -
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 ... -
Encapsulación de compuestos biocidas en materiales silíceos mesoporosos
(Investigación Joven, 2015)Se llevó a cabo la síntesis de materiales silíceos mesoporosos con diferentes grados de ordenamiento (SBA-15, MCF). Se estudió su uso como matrices estabilizadoras de un biocida comercial. Mediante adsorción/desorción de ...