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Synthesis of 4-Aminobenzoylpiperazine and Ppreparation of Composite Nanofiltration Membrane

Wang We

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Abstract

A new monomer,4-aminobenzoylpiperazine,was synthesized from 4-aminobenzoic acid and 1-formyl piperazine.The structure was identified by FT-IR and 1H NMR spectroscopy.The resulting 4-aminobenzoylpiperazine was used as an aqueous monomer to fabricate a thin film on porous polyethersulfone(PES)ultrafiltration membranes by interfacial polymerization with trimesoyl chloride(TMC)as organic monomer.The influence of monomer concentration on membrane performance was studied.The optimal concentrations of the monomers were 4-aminobenzoylpiperazine 1% and TMC 0.25%.The salt rejection of prepared composite nanofiltration membranes for Na2SO4 was 97.5%.

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What this paper is about

A new monomer,4-aminobenzoylpiperazine,was synthesized from 4-aminobenzoic acid and 1-formyl piperazine.The structure was identified by FT-IR and 1H NMR spectroscopy.The resulting 4-aminobenzoylpiperazine was used as an aqueous monomer to fabricate a thin film on porous polyethersulfone(PES)ultrafiltration membranes by interfacial polymerization with trimesoyl chloride(TMC)as organic monomer.The influence of monomer concentration on membrane performance was studied.The optimal concentrations of the monomers were 4-aminobenzoylpiperazine 1% and TMC 0.25%.The salt rejection of prepared composite nanofiltration membranes for Na2SO4 was 97.5%.

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Available abstract

A new monomer,4-aminobenzoylpiperazine,was synthesized from 4-aminobenzoic acid and 1-formyl piperazine.The structure was identified by FT-IR and 1H NMR spectroscopy.The resulting 4-aminobenzoylpiperazine was used as an aqueous monomer to fabricate a thin film on porous polyethersulfone(PES)ultrafiltration membranes by interfacial polymerization with trimesoyl chloride(TMC)as organic monomer.The influence of monomer concentration on membrane performance was studied.The optimal concentrations of the monomers were 4-aminobenzoylpiperazine 1% and TMC 0.25%.The salt rejection of prepared composite nanofiltration membranes for Na2SO4 was 97.5%.

Key concepts: Nanofiltration, Chemistry, Monomer, Interfacial polymerization, Membrane, Ultrafiltration (renal), Polymer chemistry, Aqueous solution

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