Synthesis, Characterization & Impedance Studies of some New Nano Filtration Membranes

Abstract

In the recent years membrane technology has gained significant attention from polymer chemists all around the world due to their attractive features such as efficiency, low costs, low energy costs and as effective solutions to longstanding problems in the chemical industries. Membrane technologies have been widely applied in the separation of liquids and even gases. Many separation problems can be solved economically by nanofiltration alone or in combination with other separation processes. This study aimed to synthesize polysulfone based nanofiltration membranes using DIPS (diffusion induced phase separation) technique. Newly synthesized polymer membranes were subjected to Infra red spectral and water uptake studies. Membranes were also characterized using electrochemical spectroscopy for their proton conducting property. Their surface morphology is visualized by SEM.

Synthesis and Characterization of PVDF/Graphene Nanocomposite Membrane for Water Treatment Applications

“…The subsequent solution was cooled to ambient temperature and was spread evenly on a non-woven support (18 cm x 20 cm) connected by a casting Knife with a 250-µm gate open (The K-Paint Applicator RK Print Coat Instruments, Ltd., UK) and finally cast over the glass plate. Further, the casted membrane was placed in an oven at 70°C for around 3 min to vaporize the additional solvent and at the end the membrane was isolated by immersing into precipitation bath of deionized water (DW) and stored for 5 hrs in water [8,9] The same procedure was incorporated to prepare PVDF-G (1,2,3,5 and 6 % wt graphene).…”

“…The Degree of Swelling (DS) of the membrane was dictated by weight change in various basic pH (7)(8)(9)(10)(11) arrangements. The pH influence on swelling behavior of membrane was determined at room temperature.…”

“…Membranes possessing stable performances in desalination [6] and hydrophilicity of the layer and its permeable structure assume a significant role in membrane partition process. Development to date and future potential [7] an appropriate permeable membrane should possess high penetrability, good hydrophilicity, Impedance [8] and astounding concoction impervious to the stock solution. To improve antifouling properties [4], and membrane filtration performances, modification in the surface [8] is one of the outstanding methods, which is being connected to increase the membrane filtration efficiency [9] thus changing the performance like substance resistivity, water swelling and hydrophilicity [10,11].…”

“…Development to date and future potential [7] an appropriate permeable membrane should possess high penetrability, good hydrophilicity, Impedance [8] and astounding concoction impervious to the stock solution. To improve antifouling properties [4], and membrane filtration performances, modification in the surface [8] is one of the outstanding methods, which is being connected to increase the membrane filtration efficiency [9] thus changing the performance like substance resistivity, water swelling and hydrophilicity [10,11]. Development and characterization of membranes utilizing various concentrations [12] with improved fouling resistance and filtration execution are investigated.…”

Fabrication of hybrid nanostructured arrays using a PDMS/PDMS replication process

“…Fabrication processes of ordered nanostructure arrays have recently attracted a vast amount of research attention for being applied to many functional applications, such as surface plasmonics, [1][2][3] high density data storage, 4,5 photonic devices, 6 nano-filtration, 7 and chemical and biological sensors. 8,9 Standard lithography techniques such as X-ray, E-beam and focused ion beam lithography are methods used to fabricate high-resolution nanostructured arrays.…”