Transport Properties, Mechanical Behavior, Thermal and Chemical Resistance of Asymmetric Flat Sheet Membrane Prepared from PSf/PVDF Blended Membrane on Gauze Supporting Layer

Abstract

Asymmetric polysulfone (PSf)

Development of a New Polymer Membrane: Polyvinylidene fluoride/Polyetherimide Blend Membrane

“…The peak characteristics are those that occur at 2922.06 cm -1 (CH 3 , CH 2 and CH); 2160.16 cm -1 (-N=C=O/C=C=O); 1975.41 cm -1 (C=C asymmetry stretching); 1597.77 cm -1 (NH 2 scissoring); 1231.60 cm -1 (C-O ether overlapped with C-N and C-F). These results are in line with findings [7] that report the good chemical stability of PVDF polymers in sulfuric acid environments. This condition is clearly seen in the IR spectrum of the PVDF/PEI membrane in Fig.…”

“…This third-stage mass reduction is predicted to be closely related to PVDF decomposition. The results are in line with those published in [7] which report the occurrence of PVDF decomposition at temperatures around 375 °C. To ascertain the cause of each mass reduction step, a functional group analysis of the M1 membrane using FTIR was performed.…”

“…In previous studies, the effects of PVDF addition on the characteristics of PSf/PVDF composite membranes have been studied [7]- [11]. The results show that the physical morphology, mechanical strength also thermal dan chemical resistant of the composite membrane, are strongly influenced by the concentration of PVDF in the blending solution which migration is found to occur at a limited level however the hydrophobic membrane properties are slightly elevated.…”

“…In recent years membrane technology has attracted much of the world attention in dealing with a number of crucial problems that are directly related to the increasing difficulty level of access to these primary components [6]. Polymer membranes have become an essential part of various applications related to sustainability because of the selective separation properties [7]- [9] and no additional chemical required in the process. The polyvinyl fluoride (PVDF) membrane is a major commercial microfiltration membrane that is widely used in many applications in industry, especially because of its advantages compared to many other organic polymeric materials, including high thermal and chemical resistance.…”

“…The PEI membrane tends to have weak resistance in acidic environments while PVDF in strong alkaline. However, low wettability by polar compound due to the hydrophobic surface and low surface energy and lower heat resistance due to its lower melting point begins to limit the application of PVDF membranes to specific processes involving thermal and mechanical capabilities in the industry [7]- [11], [17]. Thus, a combination of advantages and disadvantages of PEI and PVDF becomes a potential step to resolve such limitations.…”