Synthesis and Hydrodynamic Modeling Study of Epoxy/Carbon Nanospheres (Epoxy-CNS) Composite Coatings for Water Filtration Applications

Estefanía Espinoza-Márquez, José Luis Pineda-Delgado, Juan Alejandro Menchaca-Rivera, José de Jesús Pérez-Bueno, Aaron Rodríguez-López, Genaro Martín Soto-Zarazúa and Juan Francisco Pérez-Robles
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Estefanía Espinoza-Márquez: Research and Postgraduate Division, Faculty of Engineering, Autonomous University of Querétaro (UAQ), Querétaro C.P. 76230, Mexico
José Luis Pineda-Delgado: Center for Research and Advanced Studies of the National Polytechnic Institute (CINVESTAV), Querétaro C.P. 76230, Mexico
Juan Alejandro Menchaca-Rivera: Center for Research and Advanced Studies of the National Polytechnic Institute (CINVESTAV), Querétaro C.P. 76230, Mexico
José de Jesús Pérez-Bueno: Center for Research and Technological Development in Electrochemistry S. C. (CIDETEQ), Querétaro C.P. 76703, Mexico
Aaron Rodríguez-López: Directorate of Research, Technological Development and Postgraduate, Faculty of Engineering, Polytechnic University of Santa Rosa Jáuregui (UPSRJ), Querétaro C.P. 76220, Mexico
Genaro Martín Soto-Zarazúa: Research and Postgraduate Division, Faculty of Engineering, Autonomous University of Querétaro (UAQ), Querétaro C.P. 76230, Mexico
Juan Francisco Pérez-Robles: Center for Research and Advanced Studies of the National Polytechnic Institute (CINVESTAV), Querétaro C.P. 76230, Mexico

Sustainability, 2022, vol. 14, issue 7, 1-24

Abstract: Coatings for filtration applications based on epoxy resin mixtures with isopropanol were synthesized using the dip-coating technique. The nanomaterials used were carbon nanospheres (CNS) synthesized by chemical vapor deposition (CVD) and commercially obtained Vulcan XC-72 (VC). The permeation flux and permeability of the coatings were determined by vacuum filtration of pure water applying different working pressures obtaining maximum values of 0.5555 cm 3 /s and 1.19 × 10 −9 m 2 , respectively, for the CNS6 coating at 26,664 Pa. The minimum values obtained for the permeation flux and permeability were 0.0011 cm 3 /s and 1.21 × 10 −11 m 2 , for the coating CNS3 at 39,996 Pa. This study analyzed the effect of nanomaterials and the addition of isopropanol at different volumes on the permeability of the coatings. The results show that the permeability was influenced by the number of pores present rather than by their diameter. The number of pores were obtained between the ranges 1–12 μm for all the coatings. The study of computational fluid dynamics (CFD) through a free and porous medium, showed that it is possible to accurately determine flow velocities (m/s) through and inside the composite coatings. Understanding the flow behavior is a practical strategy to predict the performance of new nanocomposite coatings.

Keywords: composite coatings; carbon nanospheres; Vulcan XC-72; epoxy resin; computational fluid dynamics; nanomaterials (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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