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Evaluation of a modified spray‐applied interfacial polymerization method for preparation of nanofiltration membranes

2019; Wiley; Volume: 136; Issue: 42 Linguagem: Inglês

10.1002/app.48129

1097-4628

José Braulio Morales‐Cuevas, Sergio Pérez‐Sicairos, Shui Wai Lin, Moisés Israel Salazar‐Gastélum,

Membrane-based Ion Separation Techniques

ABSTRACT Nanofiltration (NF) membranes were fabricated by using piperazine (PIP) and trimesoyl chloride (TMC) by conventional and spray‐applied interfacial polymerization methods, studying the effect of the application method for both phases, the number of applied layers, and the displacement speed for the spray application. A polysulfone ultrafiltration membrane was used as support. NF membranes were characterized by different spectroscopic, microscopic, and physicochemical techniques. Rejection capacity was evaluated for sodium chloride (NaCl), sodium sulfate (Na 2 SO 4 ), and magnesium sulfate (MgSO 4 ) salts; the decreasing rejection order was Na 2 SO 4 > MgSO 4 > NaCl for each NF membrane. NF membrane prepared with one layer of the sprayed out TMC solution and conventional application of PIP solution exhibited the highest salt rejection (99% for 1000 ppm Na 2 SO 4 ) and a permeated flux of 10.28 L m −2 h −1 at 0.55 MPa. The modified method is a facile‐reproducible preparation methodology that reduces the consumption of time, effort, and reagents leading to a scalable manufacturing process for separation technology. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 48129.