Manufacturing, Characterisation and Mechanical Analysis of Polyacrylonitrile Membranes

Abstract

To investigate the effect of polyvinylpyrrolidone (PVP) addition and consequently porosity, two different sets of membranes are manufactured, since PVP is a widely used poring agent which has an impact on the mechanical properties of the membrane material. The first set (PAN 1) includes polyacrylonitrile (PAN) and the necessary solvent while the second set (PAN 2) is made of PAN and PVP. These membranes are put through several characterisation processes including tensile testing. The obtained data are used to model the static behaviour of the membranes with different geometries but similar loading and boundary conditions that represent their operating conditions. This modelling process is undertaken by using the finite element method. The main idea is to investigate how geometry affects the load-carrying capacity of the membranes. Alongside membrane modelling, their materials are modelled with representative elements with hexagonal and rectangular pore arrays (RE) to understand the impact of porosity on the mechanical properties. Exploring the results, the best geometry is found as the elliptic membrane with the aspect ratio 4 and the better RE as the hexagonal array which can predict the elastic properties with an approximate error of 12%.

Efficient Metal Cutting Fluid Wastewater Separation of Polyacrylonitrile Ultrafiltration Membranes Enabled by Metal Ion Cross-Linking

“…Polyacrylonitrile (PAN) UF membranes have been widely used in wastewater treatment due to their good mechanics and excellent stability . The cyano groups (-CN) on PAN chains are readily hydrolyzed to carboxyl groups (-COO – ) under alkaline conditions.…”

Halloysite Nanotube-Ferrihydrite Incorporated Polyethersulfone Mixed Matrix Membrane: Effect of Nanocomposite Loading on the Antifouling Performance

“…The increasing loading of HNT-HFO together with the presence of PVP affect the surface pore formation and the morphology in the modified membranes, as also reported elsewhere [ 45 ]. PVP acts as a pore former in the membrane [ 46 ]. Furthermore, the addition of nanocomposite has indirectly decreased the pore size of the modified membrane due to the addition of molecular chain lengths between bonds.…”

Effects of Fe(OH)3 and MnO2 Flocs on Iron/Manganese Removal and Fouling in Aerated Submerged Membrane Systems

“…The virgin and fouled HF PP membrane spectrum shows the occurrence of a new peak at 2951 cm −1 . This peak is indicative of CH 2 vibrational bands [ 49 , 50 ] of HF PP polymer [ 51 ]. The band at 3278 cm −1 in the spectrum of HF PP membrane indicates O-H stretching possibly caused by adsorbed H 2 O [ 52 ].…”