Formation and characterization of poly(acrylonitrile)/Chitosan composite ultrafiltration membranes

Preparation and characterization of polyacrylonitrile membranes modified with polyelectrolyte deposition for separating similar sized proteins

“…N and L values in the equation were determined from the SEM images. The pore sizes obtained from the SEM pictures and Hagen Poisseuille's law were found close to each other (Table 3) and the values are in agreement with those reported for the PAN membrane by Musale et al [30]. The results show that the pore size of the PAN-C membrane was not significantly affected from the polyelectrolyte deposition which simply confirmed that polyelectrolytes did not penetrate into the membrane, instead, they adsorbed on the surface.…”

Effects of surface crosslinking on sieving characteristics of chitosan/poly(acrylonitrile) composite nanofiltration membranes

“…The cross-sectional morphology of the representative composite membrane was characterized by scanning electron microscopy (SEM), whereas the variations in chemical composition on the surface at different crosslinking conditions were examined by X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared-attenuated total reflectance spectroscopy (FTIR-ATRS) (also known as internal reflection spectroscopy). While the analysis conditions and instruments for SEM and XPS analysis were similar as reported previously [7], the FTIR-ATRS analysis details are as follows.…”

“…Poly(acrylonitrile) (PAN), one of the versatile polymeric materials, in addition to its well established use for asymmetric ultrafiltration (UF) membranes has been used as a microporous substrate for making composite membranes [1][2][3]. Chitosan, a natural hydrophilic biopolymer, has been used as a membrane material for reverse osmosis [4], pervaporation (PV) [1,5], and gas separation membranes [6], and recently we have demonstrated its use in composite UF membranes [7]. Since PAN is more hydrophilic compared to the commonly used polysulfone (PSF) substrate, the composite NF membranes of PAN with hydrophilic chitosan may be relatively more stable than chitosan/PSF composite membranes, during long-term operation.…”

“…Since PAN is more hydrophilic compared to the commonly used polysulfone (PSF) substrate, the composite NF membranes of PAN with hydrophilic chitosan may be relatively more stable than chitosan/PSF composite membranes, during long-term operation. Although work on chitosan/ PAN composite PV [1,2,8] and UF [7] membranes has been reported, to the best of our knowledge there is no literature on chitosan/PAN composite NF membranes. The hydrophilic chitosan/PAN composite NF membranes would be of interest in applications such as demineralization of whey, where hydrophilicity of the membranes would help to minimize fouling caused by protein adsorption.…”

Preparation and Characterization of an Eco-Friendly Polymer Electrolyte Membrane (PEM) Based in a Blend of Sulphonated Poly(Vinyl Alcohol)/ Chitosan Mechanically Stabilised by Nylon 6,6

“…Due to its low cost production, natural abundance and eco-compatibility, CS is the preferred bio-material membrane for ultra-filtration, reverse-osmosis and pervaporation. 3,7,8 PVAL is also an attractive material for membrane electrolyte development as it is a cheap polymer holding high density functional -OH groups with potential for chemical crosslinking. [9][10][11] These polymers show good film forming properties, chemical resistance and the hydrophilic group high density allows chemical modifications of the polymer chain by crosslinking and grafting.…”