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PREPARATION AND CHARACTERIZATION OF POLYAMIDE COMPOSITE NANOFILTRATION MEMBRANES

Congjie Gao

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Abstract

Composite nanofiltration membranes based on polyamide were prepared with m-xylylenediamine(m-XDA) and trimesoyl chloride (TMC) through interfacial polymerization on the polysulphone film. The influences of various parameters on the performance of membranes were studied including the concentration of reactants, pH, reaction time, curing temperature and curing time for thin film formation. The surface morphology and structure of membranes were characterized by infrared spectra (FT-IR) and scanning electronic microscopy (SEM). The rejection of 1000 mg·L-1 Na2SO4 solution was about 82.98% and the flux was about 28.48 L·m-2·h-1 at the operating pressure of 1.4 MPa.

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What this paper is about

Composite nanofiltration membranes based on polyamide were prepared with m-xylylenediamine(m-XDA) and trimesoyl chloride (TMC) through interfacial polymerization on the polysulphone film. The influences of various parameters on the performance of membranes were studied including the concentration of reactants, pH, reaction time, curing temperature and curing time for thin film formation. The surface morphology and structure of membranes were characterized by infrared spectra (FT-IR) and scanning electronic microscopy (SEM). The rejection of 1000 mg·L-1 Na2SO4 solution was about 82.98% and the flux was about 28.48 L·m-2·h-1 at the operating pressure of 1.4 MPa.

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Available abstract

Composite nanofiltration membranes based on polyamide were prepared with m-xylylenediamine(m-XDA) and trimesoyl chloride (TMC) through interfacial polymerization on the polysulphone film. The influences of various parameters on the performance of membranes were studied including the concentration of reactants, pH, reaction time, curing temperature and curing time for thin film formation. The surface morphology and structure of membranes were characterized by infrared spectra (FT-IR) and scanning electronic microscopy (SEM). The rejection of 1000 mg·L-1 Na2SO4 solution was about 82.98% and the flux was about 28.48 L·m-2·h-1 at the operating pressure of 1.4 MPa.

Key concepts: Nanofiltration, Polyamide, Interfacial polymerization, Membrane, Thin-film composite membrane, Curing (chemistry), Chemical engineering, Materials science

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