John Henao

IQE (United Kingdom)

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Carlos A. Poblano-Salas

Tecnologie Avanzate (Italy)

Jorge Corona‐Castuera

Tecnologie Avanzate (Italy)

Astrid L. Giraldo-Betancur

Center for Research and Advanced Studies of the National Polytechnic Institute

D.G. Espinosa-Arbeláez

Center for Engineering and Industrial Development

O. Sotelo-Mazón

Universidad Autónoma del Estado de México

L. Martínez-Gómez

Universidad Nacional Autónoma de México

Paola Forero

Universidad Tecnológica de Querétaro

A. Concustell

Forest Science and Technology Centre of Catalonia

J.M. Guilemany

Universitat de Barcelona

Oscar Sotelo

Universidad Nacional Autónoma de México

Cooperative Institutions

Universidad Nacional Autónoma de México

Universidad Autónoma del Estado de Morelos

Instituto Politécnico Nacional

Center for Research and Advanced Studies of the National Polytechnic Institute

Polytechnic University of Queretaro

IQE (United Kingdom)

Consejo Nacional de Humanidades, Ciencias y Tecnologías

Center for Engineering and Industrial Development

Universidad de Antioquia

Universitat de Barcelona

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On the formation of porosity in hydroxyapatite/polyester high-velocity oxygen-fuel sprayed coatings and their electrochemical behavior in simulated body fluid

Applied Physics A (2023)

Juan Toledo John Henao Carlos A. Poblano-Salas Astrid L. Giraldo-Betancur D.G. Espinosa-Arbeláez

Simulated body fluid

10.1007/s00339-023-07171-2

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Citations (1)

Electrochemical performance of the rare-earth perovskite-type oxide La0.6Sr0.4Co0.2Fe0.8O3 as negative electrode material for Ni/oxide rechargeable batteries

Materials for Renewable and Sustainable Energy (2017)

John Henao Oscar Sotelo M. Casales L. Martínez-Gómez

In this paper, the perovskite-type oxide La0.6Sr0.4Co0.2Fe0.8O3 was evaluated as a novel negative electrode material for Ni/oxide rechargeable batteries. The structure and morphology of the as-prepared powder was studied by scanning electron microscopy and X-ray diffraction. The electrochemical performance of the perovskite-type oxide was investigated using chronopotentiometric, chronoamperometric and potentiodynamic polarization techniques. The maximum discharge capacity values of the perovskite-type electrodes were obtained during the first three cycles (51, 172 and 462 mAh g−1 at 298, 313 and 333 K, respectively). The maximum adsorption capability of hydrogen in the perovskite-type electrode was 1.72% wt. hydrogen at a current rate of 125 mA g−1, 333 K and 6 M KOH. The cycling ability was fairly good with 64% capacity conservation after 20 cycles at 333 K. The electrochemical evaluation was also performed using different electrolyte concentrations; interestingly, the maximum discharge capacity of the perovskite-type electrodes increased in a linear-like manner with the incremental changes in electrolyte concentration. The hydrogen diffusion coefficient and exchange current density were also estimated to discuss the kinetics of the process.

Exchange current density

10.1007/s40243-017-0100-x

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Citations (8)

X-ray diffraction structural characterization of julolidinic derivatives polysubstituted, synthesized via Povarov's cationic reaction

Acta Crystallographica Section A Foundations and Advances (2023)

J. A. Grande John Henao Antonio A. Romero R. Toro

Julolidine (1,7-diaryl -2,6-dimethyljulolidine) is a new compound with great interest in the industrial and medicinal areas.In the last decade, studies of these materials have shown benefits from their fluorescent properties capable of becoming the central basis of energy exchange, or in being a medicinal alternative in diseases such as Alzheimer's or Diabetes [1].These properties can vary depending on the substituents attached to the julolidinic nucleus, which poses a wide use of these compounds.1,7-bis(3-methoxy-4-hydroxyphenyl)-2,6,9-trimethyljulolidine (C29H33NO4) or JL-1 and 1-(3,4-methylenedioxyphenyl)-7-(4methoxyphenyl)-2,6,9-trimethyljulolidine (C29H31NO3) or JL-2 are a derivative of a Julolidine synthesized at the Industrial University of Santander by the CODEIM Research Group [2] through the cationic Povarov reaction of 4-methylinine and Isoeugenol as precursors.These compounds were purified through column chromatography (diethyl ether-ethyl acetate) in 2:1 ratio and crystallized under atmospheric conditions obtaining needle-shaped crystals as a result.Structure resolution and refinement was carried out through direct and least squares methods using the SHELX software package with the facility of the OLEX 2.0 v1.5 interface [3].JL-1 crystallizes in an orthorhombic system with space group Pna21 and cell parameters a = 9.2446(4) Å, b = 21.2452(8)Å, c = 25.3771(9)Å, V = 4984(2) Å3 and Z= 8, with two crystallographically independent units (Figure 1a) and JL-2 in a monoclinic system with space group P21/n and parameters a = 10.3855(11)Å, b = 10.4233(11)Å, c = 22.497(3) Å, V = 2429.6(5)Å3 and Z= 4 (Figure 1b).The JL-1 packing features hydrogen bonds, X-H••••π and π••••π interactions that give stability to the crystal lattice.Together, all interactions give rise to a tetramer-like packing that extends diagonally along the bc plane.The supramolecular analysis using Hirshfeld surface analysis was carried out with the CrystalExplorer v21.5 program [4] showing the areas with higher interactions (H••••H 69.6%, C••••H 17.1%, O••••H 10.5%) in relation to their fingerprints.For JL-2 currenlty the work is enphasys in research about in the fingersprints and the hydrogen bonds and packing between the units.Figure 1.a. Tetramer packing along the bc axes JL-1(Left) b.Packing along bc axes JL-2 (Right).

Cationic polymerization

Characterization

10.1107/s2053273323088046

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Citations (0)

Understanding the Deposition of Multilayered Hydroxyapatite-Bioactive Glass/Hydroxyapatite/Titanium Dioxide Coatings on Peek Substrates by Plasma Spray

Benjamín Ortega-Bautista John Henao Carlos A. Poblano-Salas Astrid L. Giraldo-Betancur D.G. Espinosa-Arbeláez

Titanium Dioxide

Deposition

10.2139/ssrn.4964695

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Effect of the modification of spray drying parameters on the fabrication of bovine-derived hydroxyapatite microspheres for biomedical applications

Materials Today Communications (2022)

J. Hincapie-Bedoya Carlos A. Poblano-Salas B. Moreno-Murguia Aixa I. Gutiérrez-Pérez John Henao

Particle (ecology)

Morphology

10.1016/j.mtcomm.2022.103838

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Citations (6)

On the formation of metallic glass coatings by means of Cold Gas Spray technology

Journal of Alloys and Compounds (2015)

A. Concustell John Henao S. Dosta N. Cinca I.G. Cano

Deposition

Shear band

10.1016/j.jallcom.2015.07.270

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Citations (52)

COMPORTAMIENTO AL CHOQUE TÉRMICO DE RECUBRIMIENTOS DE Al2O3 -45% TiO2 ELABORADOS POR PROYECCIÓN TÉRMICA POR LLAMA

Revista Colombiana de Materiales (2014)

John Henao Fábio Moreira Vargas Andrés González Esperanza Márquez López

En este trabajo se evalúo el comportamiento al choque térmico de los recubrimientos de Al2O3–45% en peso de TiO2 elaborados mediante proyección térmica por llama sobre sustratos de acero al carbono AISI 1020. Para tal efecto fueron controlados los principales parámetros de la técnica de proyección térmica, tomando como variables la distancia de proyección y el uso de polvos de igual composición química pero diferente referencia comercial. Adicionalmente, se realizó un control sobre los espesores para determinar su efecto bajo carga térmica. El análisis por Difracción de Rayos X y la cuantificación de fases por el método de Rietveld permitió determinar las fases y su porcentaje en cada tipo de recubrimiento. Éstos fueron sometidos a ciclos repetitivos de enfriamiento-calentamiento entre 650 °C y temperatura ambiente con enfriamiento en agua. Se determinó que el espesor así como los defectos estructurales producidos durante la elaboración de los recubrimientos son características ligadas directamente con la resistencia al choque térmico. Así mismo, se determinó que las fases compuestas principalmente por titanatos de aluminio juegan un rol importante sobre el comportamiento al choque térmico.

10.17533/udea.rcm.19590

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Understanding the deposition of multilayered hydroxyapatite-bioactive glass/hydroxyapatite/titanium dioxide coatings on PEEK substrates by plasma spray

Surface and Coatings Technology (2024)

Benjamín Ortega-Bautista John Henao Carlos A. Poblano-Salas Astrid L. Giraldo-Betancur D.G. Espinosa-Arbeláez

Titanium Dioxide

Deposition

10.1016/j.surfcoat.2024.131543

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Design and Fabrication of a Customized Partial Hip Prosthesis Employing CT-Scan Data and Lattice Porous Structures

ACS Omega (2021)

Jorge Corona‐Castuera Daniela Rodriguez-Delgado John Henao Juan Carlos Castro-Sandoval Carlos A. Poblano-Salas

As a larger elderly human population is expected worldwide in the next 30 years, the occurrence of aging-associated illnesses will also be increased. The use of prosthetic devices by this population is currently important and will be even more dramatic in the near future. Hence, the design of prosthetic devices able to reduce some of the problems associated with the use of current components, such as stress shielding, reduced mobility, infection, discomfort, etc., becomes relevant. The use of additive manufacturing (AM) and the design fabrication of self-supported cellular structures in the biomedical area have opened up important opportunities for controlling the physical and mechanical properties of hip implants, resulting in specific benefits for the patients. Different studies have reported the development of hip prosthetic designs employing AM, although there are still opportunities for improvement when it comes to customized design and tuning of the physical and mechanical properties of such implants. This work shows the design and manufacture by AM of a personalized stainless-steel partial hip implant using tomography data and self-supported triply periodic minimal surface (TPMS) cell structures; the design considers dimensional criteria established by international standards. By employing tomography data, the external dimensions of the implant were established and the bone density of a specific patient was calculated; the density and mechanical properties in compression of the implant were modulated by employing an internal gyroid-type cell structure. Using such a cell structure, the patient's bone density was emulated; also, the mechanical properties of the implant were fine-tuned in order to make them comparable to those reported for the bone tissue replaced by the prosthesis. The implant design and manufacturing methodology developed in this work considered the clinical condition of a specific patient and can be reproduced and adjusted for different types of bone tissue qualities for specific clinical requirements.

Stress shielding

10.1021/acsomega.0c06144

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Citations (32)

Electrochemical Study of Three Stainless Steel Alloys and Titanium Metal in Cola Soft Drinks

Journal of Electrochemical Science and Technology (2017)

D. Peralta-Lopez O. Sotelo-Mazón John Henao J. Porcayo-Calderón Benjamín Valdez

Soft drink

10.5229/jecst.2017.8.4.294

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Citations (3)