Amphiphilic ABA-type triblock copolymers for the development of high-performance poly(vinylidene fluoride)/poly(vinyl pyrrolidone) blend ultrafiltration membranes for oil separation
Tota Rajasekhar
Polymers and Functional Materials Division, Indian Institute of Chemical Technology, Council of Scientific and Industrial Research, Tarnaka, Hyderabad, 500 007 India
Present address: Department of Chemistry, University of Massachusetts Lowell, One University Avenue, Lowell, Massachusetts, 01854
Search for more papers by this authorPolisetti Veera Babu
Reverse Osmosis Membrane Division, Central Salt and Marine Chemicals Research Institute, Council of Scientific and Industrial Research, Bhavnagar, 364002 India
Search for more papers by this authorJonnalagadda Gopinath
Polymers and Functional Materials Division, Indian Institute of Chemical Technology, Council of Scientific and Industrial Research, Tarnaka, Hyderabad, 500 007 India
Academy of Scientific and Innovative Research, Indian Institute of Chemical Technology, Council of Scientific and Industrial Research, Tarnaka, Hyderabad, 500 007 India
Search for more papers by this authorCorresponding Author
Annadanam V. Sesha Sainath
Polymers and Functional Materials Division, Indian Institute of Chemical Technology, Council of Scientific and Industrial Research, Tarnaka, Hyderabad, 500 007 India
Academy of Scientific and Innovative Research, Indian Institute of Chemical Technology, Council of Scientific and Industrial Research, Tarnaka, Hyderabad, 500 007 India
Correspondence to: A. V. S. Sainath (E-mail: [email protected] or [email protected]) and A. V. R. Reddy (E-mail: [email protected])Search for more papers by this authorCorresponding Author
A. V. R. Reddy
Reverse Osmosis Membrane Division, Central Salt and Marine Chemicals Research Institute, Council of Scientific and Industrial Research, Bhavnagar, 364002 India
Correspondence to: A. V. S. Sainath (E-mail: [email protected] or [email protected]) and A. V. R. Reddy (E-mail: [email protected])Search for more papers by this authorTota Rajasekhar
Polymers and Functional Materials Division, Indian Institute of Chemical Technology, Council of Scientific and Industrial Research, Tarnaka, Hyderabad, 500 007 India
Present address: Department of Chemistry, University of Massachusetts Lowell, One University Avenue, Lowell, Massachusetts, 01854
Search for more papers by this authorPolisetti Veera Babu
Reverse Osmosis Membrane Division, Central Salt and Marine Chemicals Research Institute, Council of Scientific and Industrial Research, Bhavnagar, 364002 India
Search for more papers by this authorJonnalagadda Gopinath
Polymers and Functional Materials Division, Indian Institute of Chemical Technology, Council of Scientific and Industrial Research, Tarnaka, Hyderabad, 500 007 India
Academy of Scientific and Innovative Research, Indian Institute of Chemical Technology, Council of Scientific and Industrial Research, Tarnaka, Hyderabad, 500 007 India
Search for more papers by this authorCorresponding Author
Annadanam V. Sesha Sainath
Polymers and Functional Materials Division, Indian Institute of Chemical Technology, Council of Scientific and Industrial Research, Tarnaka, Hyderabad, 500 007 India
Academy of Scientific and Innovative Research, Indian Institute of Chemical Technology, Council of Scientific and Industrial Research, Tarnaka, Hyderabad, 500 007 India
Correspondence to: A. V. S. Sainath (E-mail: [email protected] or [email protected]) and A. V. R. Reddy (E-mail: [email protected])Search for more papers by this authorCorresponding Author
A. V. R. Reddy
Reverse Osmosis Membrane Division, Central Salt and Marine Chemicals Research Institute, Council of Scientific and Industrial Research, Bhavnagar, 364002 India
Correspondence to: A. V. S. Sainath (E-mail: [email protected] or [email protected]) and A. V. R. Reddy (E-mail: [email protected])Search for more papers by this authorABSTRACT
ABA-type amphiphilic triblock copolymers (TBCs) were synthesized by a reversible addition fragmentation chain transfer (RAFT) process with a telechelic polystyrene macro-RAFT agent and 4-[n-(acryloyloxy)alkyloxy]benzoic acid monomers. Ultrafiltration (UF) membranes were fabricated by a phase-inversion process with blends of the TBC, poly(vinylidene fluoride) (PVDF), and poly(vinyl pyrrolidone) (PVP) in dimethylformamide. The UF-fabricated membranes were characterized by scanning electron microscopy, atomic force microscopy, water contact angle measurement, thermogravimetric analysis, and differential scanning calorimetry. Pure water permeation, molecular weight cutoff values obtained by the permeation of different molecular weight polymers as probe solutes, bovine serum albumin (BSA) solution permeate flux, and oil–water emulsion filtration tests were used to evaluate the separation characteristics of the fabricated membranes. The tripolymer blend membranes exhibited a higher flux recovery ratio (FRR) after the membrane was washed with sodium lauryl sulfate (0.05 wt %) solution for a BSA solution (FRR = 88%) and oil–water emulsion (FRR = 95%) feeds when than the PVDF–PVP blend membrane (57 and 80% FRR values for the BSA solution and oil–water emulsion, respectively). The pendant carboxylic acid functional moieties in this ABA-type TBC have potential advantages in the fabrication of high-performance membranes. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45132.
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