JPJhon Jairo Palechor-Tróchez

Jhon Jairo Palechor-Tróchez

*This is an algorithmically generated author record based on publicly available information.

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Jhon Jairo Palechor-Tróchez has a total of 16 co-authors. Here are the top co-authors by number of shared publications:


Latest Publications

  • Biodegradation Process of Flexible Films Based on Cassava Starch Performed at a Pilot‐Scale

    by Ronaldo Ademir Bonilla‐Laguado, Héctor Samuel Villada‐Castillo, Jhon Jairo Palechor‐Trochez

    This study assessed the biodegradability of flexible film and its components. The tests were carried out under composting conditions. The kinetics of carbon dioxide production and the percentage of biodegradation were measured. Fourier Transform InfraRed spectroscopy (FTIR), Thermo Gravimetric Analysis (TGA), and Scanning Electron Microscopy (SEM) were used to study changes of the films in the biodegradation test. The total organic carbon (TOC) was measured. After the biodegradation test, plant growth tests were carried out, which included measurement of chlorophyll Index (CI). The results showed that the flexible film, ecovio F2223, and thermoplastic starch (TPS) achieved biodegradation of 92.13%, 93.20%, and 96.88%, respectively, in contrast to the polylactic acid‐PLA (80.28%). The FTIR showed changes in molecular structures, mainly in band crystalline zones around 2800–3000 cm−1, deformation bands between 1400 and 1500 cm−1 and in amorphous zones band of 1200–1000 cm−1. TGA to flexible films, PLA, ecovio F2223, and TPS showed a thermal degradation around 350°C, 360°C, 370°C, and 320°C, due to polymeric structures degradation. SEM micrographs show morphology change on the films surfaces after the biodegradation test, evidencing the action of microorganisms. The plant growth tests showed the compost stability by Gemination percentage and CI no presented significative differences.


  • Open Access

    Propiedades mecánicas de películas obtenidas a partir de pellets de almidón termoplástico almacenados en diferentes condiciones

    by Adriana Rocío Chantre López, Hector Samuel Villada Castillo, Jhon Jairo Palechor Trochez, Camilo Elías Montilla Buitrago, Rudy Alberto Gómez López

    El desarrollo de materiales biodegradables como reemplazo de los plásticos convencionales se ha estudiado y analizado hasta su punto de producción, sin embargo, existe pocos estudios sobre la determinación del tiempo de vida útil de los pellets a partir de almidón para obtener materiales biodegradables, la mayoría se han realizado con base a pellets de madera, utilizando recubrimientos, pretratamientos térmicos, aditivos, etc., con el fin de aumentar la vida útil o tiempo en almacenamiento. En este sentido, el objetivo de este estudio se basó en determinar los efectos de las condiciones de empaque y almacenamiento sobre las propiedades finales de los pellets y las películas producidas a partir de almidón de yuca termoplástico (TPS) y ácido poliláctico (PLA). Los pellets se almacenaron en tres tipos de empaque (celulosa multicapa, polietileno y papel), tres humedades relativas (70 %, 26 % y 10 %) y se procesaron en los días 0, 8, 20, 40 y 75 para obtener las películas flexibles y realizar una medición a sus propiedades mecánicas como variable de respuesta. Se obtuvo que los factores tipo de empaque y tiempo de almacenamiento de los pellets afectan significativamente las propiedades mecánicas de tracción de las películas obtenidas a partir de los pellets almacenados, presentando una disminución del esfuerzo en el sentido longitudinal de las películas de 15 MPa a 10 MPa y un aumento del porcentaje de deformación de aproximadamente 20 % con respecto a la muestra control, debido al proceso de retrogradación y plastificación que sufre el almidón cuando es almacenado. Los empaques de celulosa multicapa y el polietileno mostraron ser dos posibles tipos de empaque para almacenar los pellets por 20 días.


  • Open Access

    Evaluación de la estabilidad biológica y química de distintos compost como inóculo en ensayos de biodegradación aerobia.

    by Ronaldo Ademir Bonilla Laguado, Héctor Samuel Villada Castillo, Jhon Jairo Palechor Trochez

    La estabilidad biológica y química del compost es fundamental en las pruebas de biodegradación de materiales plásticos. En este estudio, se evaluaron tres compost de diferente composición y procedencia: Finca La Rejoya, Granja Integral Mamá Lombriz y un compost comercial (Abonisa). La estabilidad biológica se analizó mediante un ensayo de germinación con semillas de maíz nativas, pruebas de tolerancia de plántulas de trigo (evaluando rendimiento de semillas, altura, longitud de raíces e índice de clorofila) y la cuantificación de dióxido de carbono (CO2). La estabilidad química se determinó mediante el análisis de carbono orgánico total (COT), nitrógeno, relación carbono/nitrógeno (C/N), sólidos totales (SST), sólidos volátiles (STV) y pH. Los resultados mostraron diferencias significativas entre los compost evaluados. El compost de la Finca La Rejoya presentó condiciones óptimas, con un índice de germinación del 88,89%, rendimiento de semillas del 95,74%, el mayor índice de clorofila (1,83), menor generación de CO2 (150,26 mL en 48 horas), una relación C/N de 13,36 y pH de 7,11. Este estudio destaca la importancia de evaluar previamente la estabilidad del compost antes de utilizarlo en pruebas de biodegradación aerobia y concluye que el compost de la Finca La Rejoya es el más adecuado como inóculo para estas aplicaciones.

  • Open Access

    Effect of the Addition of Fique Bagasse Cellulose Nanoparticles on the Mechanical and Structural Properties of Plastic Flexible Films from Cassava Starch

    by Jhon Jairo Palechor-Trochez, Adriana Rocio Chantre-López, Eduardo Argote-Ortiz, Héctor Samuel Villada-Castillo, Jose Fernando Solanilla-Duque

    One of the activities most representative of the agricultural sector in Colombia is the production of biodegradable fique fiber. The efficiency of the defiberization process of the fique leaves is very low since a mere 4% of the total weight of the leaf (cabuya) is used and marketed. The remaining 96%, composed of fique juice and bagasse, is considered to be waste and discarded, impacting the environment. The aim of this work was to study fique bagasse as a source of cellulose nanoparticles (CNCs). CNCs were obtained by acid hydrolysis and added at 10% to films made from cassava thermoplastic starch (TPS) by the casting method. Structural changes in the CNCs, TPS, and their mixtures were characterized by FTIR-ATR and their morphology and particle size by SEM and TEM microscopy, respectively. Thermal properties were analyzed using DSC and TGA, along with their effect on mechanical properties. Changes in the FTIR spectra indicated that the chemical method adequately removed hemicellulose and lignin from the fiber surface of fique bagasse. The CNCs showed a diameter and length of 7.5 ± 3.9 and 52.7 ± 18.1 nm, respectively, and TPS 10% CNC obtained an increase in mechanical strength of 116%. The obtainment of CNCs from lignocellulosic materials can thus be viewed as a favorable option for the subsequent reinforcement of a polymeric matrix.


  • Open Access

    Methodological Approach and Technological Framework to Produce a Massive Open Online Course (MOOC) in Biodegradable Packing

    by Anabel Guzman Ordoñez, Carlos León Casanova, Héctor Samuel Villada Castillo, Jhon Jairo Palechor Tróchez, Carlos León Roa

    This article shows the different stages used for the design and production of a MOOC for biodegradable packing, the planning tools and methodologies used for the development of the themes and contents. Likewise, is shown the technological framework used making a surveillance technology to identify which stage the MOOC e-learning tech is and the search of terms related to biodegradable packing to identify potential topics. Finally, the software architecture for SELENE is explained and how is deployed in open edX platform.

  • Open Access

    Corrigendum to “Relationship between Color CIEL∗a∗b∗ and Total Organic Carbon in Compost”

    by Jhon Jairo Palechor-Tróchez, Luis Eduardo Ordoñez Santos, Hector Samuel Villada-Castillo

  • Open Access

    Relationship between Color CIEL∗a∗b∗ and Total Organic Carbon in Compost

    by Jhon Jairo Palechor-Tróchez, Luis Eduardo Ordoñez Santos, Hector Samuel Villada-Castillo

    The coordinates and the total organic carbon content in compost were correlated. Two particle sizes of 0.5 and 2 mm were obtained in the compost samples; the surface color was analyzed with a colorimeter and the total organic carbon content by spectrophotometry at 588.9 nm. The results indicate that all chromaticity values were significantly affected (p < 0.001) by particle size. Chromaticity values a∗, b∗, C∗, and h° showed significantly strong Pearson correlations (r > 0.95). The coordinates a∗ (r = −0.992) and b∗ (r = 0.968) have the potential to be used in estimating the total organic carbon concentration in the compost samples analyzed.