Polyvinyl Alcohol-Cellulose Acetate Composite Reverses Osmosis Membranes: I. Synthesis and Characterization

Abstract

To overcome the high salinity water resources problem, reverse osmosis (RO) process is considered one of the most required techniques due to its high portable water quality produced. Optimization of membranes quality and function is still pursued and considered as of an important added value to the RO processes. In the present study, thin film PVA/CA+PEG membranes were prepared and the PVA layer was crosslinked by a varying maleic acid concentration at different reaction periods. The polymer composite is to be employed for the reverse osmosis process of brackish, saline and sea water purification. Optimization of reaction conditions and parameters such as salt rejection and water flux that affect on the membrane efficiency were verified. Structural and functional characterization of the PVA/CA composite membranes through Fourier Transform Infrared (FT-IR), thermogravimetric analysis (TGA), X-ray diffraction pattern, scanning electron microscopy (SEM), swelling behavior and membrane mechanical properties were monitored.

A critical review on recent polymeric and nano-enhanced membranes for reverse osmosis

“…Muhammed et al have fabricated and characterized a PVA-CA composite membrane by using different concentrations of maleic acid and varying the reaction times to cross-link the PVA layer. 74 Thin lms comprising PEG and CA were interfacially polymerized over PVA support membranes having different chemistry and pore structures. Large pores were added onto the hydrophobic skin layer resulting in membranes with higher water permeability.…”

Preparation and Characterization of a Bioartificial Polymeric Material: Bilayer of Cellulose Acetate-PVA

“…The PEG boosts the formation of pores in the structure which indeed can be correlated with the results for gas permeability where CA + ADD exhibit higher values than CA (shown below). CA molecules on the other hand are immobilized in a glassy state as a consequence of the effect of acetone during the casting and the crystallinity of this film is considerably lower than the crystallinity of CA + ADD (see DSC results) [43,44]. By comparing Figures 2(c) and 2(d), minor differences in the roughness are revealed.…”

Synthesis, characterization and drug-delivery activity of rifampin anchored poly(vinyl alcohol)

“…and further characterized by WAFS, differential scanning calorimetry (DSC), ultravioletvisible (UV-visible) techniques, and swelling properties [9]. PVA was also structurally modified with isopropylacryl amide [10], hydroxyl acids [11], poly(ε-aprolactone) [12], carboxymethyl chitosan [13], maleic anhydride [14], * Author for correspondence (anbu_may3@yahoo.co.in) poly(lactide-co-glycolide) [15], ethylene diaminetetraacetic acid, and dianhydride [16], guargum [17], sulphosuccinic acid [18], fumaric acid [19] and butaraldehyde [20]. Even after thorough literature survey no report based on the Rif.modified PVA has been reported.…”