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.
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Division of Sustainable Development,
College of Science and Engineering
Hamad Bin Khalifa University, Qatar Foundation
Qatar Foundation, Education City
Doha
Qatar