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Accueil du site → Master → Mexique → Maestría → Design, simulation and application of a PCL membrane with TiO2 and Ag nanoparticles for a novel geometry fog water harvesting device

Instituto de Tecnológico de Estudios Superiores de Monterrey (ITESM) 2019

Design, simulation and application of a PCL membrane with TiO2 and Ag nanoparticles for a novel geometry fog water harvesting device

Borbolla Torres, César Iván

Titre : Design, simulation and application of a PCL membrane with TiO2 and Ag nanoparticles for a novel geometry fog water harvesting device

Auteur : Borbolla Torres, César Iván

Etablissement de soutenance : Instituto de Tecnológico de Estudios Superiores de Monterrey (ITESM)

Grade : Master of Science in Nanotechnology 2019

Résumé partiel
Nowadays, the world faces an increasing water crisis problem that will become even more severe in the years to come. Fog-water harvesting represents an economical and efficient alternative to address water scarcity around the world. In this study a report on the development of Polycaprolactone (PCL) composite membranes using TiO2 nanoparticles (NPs), Ag NPs and Ag-TiO2 NPs is presented, besides the effect of using two different solvents, acetic acid and a mixture of chloroform and N,N-dimethylformamide (DMF), to achieve a hydrophobic material capable of assisting fog-water harvesting applications. The proposal of a novel geometry is presented validated through mechanical and air-flow simulation. Beside the investigation and development of a new manufacture procedure for the application of the composite polymer material on a commercial Rashel mesh to enhance its properties. Surface morphology and roughness were explored by scanning electron and infinity focus microscopy, a more homogeneous morphology was observed for composites elaborated with chloroform-DMF. The degree of crystallinity and structural properties were investigated by differential scanning calorimetry and x-ray diffraction. The interaction between PCL and the dopants NPs was studied by Fourier transform infrared spectroscopy, detecting a shift to lower wavenumbers in the principal polymer modes corroborating a compatibility between the solvents, the NPs and the PCL polymer matrix.

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