Abstract
In our previous work, a series of polyetherimide (PEI) nanofiltration membranes has been developed for removal of textile dyes from wastewater. Based on that previous study, another class of PEI-based membrane was developed for sustainable eco-engineering development in Indonesia, namely polyetherimide thin film composite (PEI-TFC) membranes. These PEI-TFC membranes were fabricated from dope solution consists of PEI dissolved in N-methyl pyrollidone (NMP) solvent and acetone as a non-solvent. The dope solutions were then continued to the membrane casting process, followed by solvent exchange process to remove the residual NMP in the pores of the membranes. The cast membranes were then immersed in 1.5% w/w m-phenylenediamine (MPD) in deionized water, followed by immersion in (0.05% w/w trimesoyl chloride in hexane). Those chemicals act as precursor to form a polymeric thin film in a process called interfacial polymerization to attach TFC layer on top of the PEI-TFC membranes. The fabricated PEI-TFC membranes were employed to treat synthetic wastewater containing Reactive Red 120 dye (RR120), with good rejection of 90%. The membranes could be further explored for the improvement of environmental sustainability of Indonesia, especially for the water ecology system.
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