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Modeling and experimental validation of the elastic modulus of polysulfone membranes reinforced with cellulose nanofibers

Reema H. Alasfar, Saïd Ahzi, Nicolas Barth, Viktor Kochkodan and Muammer Koç

Vol. 10 (2022), No. 4, 413–429
Abstract

Polymeric nanofilled membranes are required to have good mechanical properties in addition to having proper filtration function. Their mechanical properties are highly influenced by the content and distribution of nanofillers and by the porosity and pore morphology. This study focuses on computational modeling and experimental validation of the effective elastic modulus of the fabricated polysulfone membranes reinforced with different contents of cellulose nanofibers. Average cross-section porosities are investigated using the image processing method. The pore morphology factor, in the power law relation for the porosity effect, is also investigated through a finite element model. To characterize the instantaneous stiffnesses and transition temperatures for pristine nonporous matrix and for nanofilled porous membranes, the effective storage modulus was characterized through dynamic mechanical analysis for a wide range of temperatures. Our computational model predictions for different membrane microstructures are found to be in good agreement with the experimentally measured values.

Keywords
elastic modulus, porosity, pore morphology, dense PSF film, PSF/CNF membranes
Mathematical Subject Classification
Primary: 70-05, 70-08, 70-10
Milestones
Received: 15 January 2023
Accepted: 4 March 2023
Published: 30 April 2023

Communicated by Emilio Barchiesi
Authors
Reema H. Alasfar
Division of Sustainable Development, College of Science and Engineering
Hamad Bin Khalifa University, Qatar Foundation
Qatar Foundation, Education City
Doha
Qatar
Saïd Ahzi
Institute of Fluid and Solid Mechanics UMR
University of Strasbourg / CNRS
2 Rue Boussingault
67000 Strasbourg
France
Nicolas Barth
Qatar Environment and Energy Research Institute
Hamad Bin Khalifa University, Qatar Foundation
Qatar Foundation
Doha
Qatar
Viktor Kochkodan
Qatar Environment and Energy Research Institute
Hamad Bin Khalifa University, Qatar Foundation
Qatar Foundation
Doha
Qatar
Muammer Koç
Division of Sustainable Development, College of Science and Engineering
Hamad Bin Khalifa University
Qatar Foundation, Education City
Doha
Qatar