Abstract
The Polyvinylidene Fluoride (PVDF) membrane has been prepared by phase inversion method using N,N-dimethylacetamide (DMAc) as solvent and Poly Ethylene Glycol (PEG) as additive. The fabricated membrane was modified by Polydopamine (PDA) coating in concentration of 0.5 mg/ml and immersion times of 2 hours, 6 hours, and 24 hours. The characteristics and performance of the PVDF membranes before and after the modification are studied in this paper. The result of the water flux experiment showed that the PDA-coated PVDF membranes showcased a higher flux than that of pure PVDF membrane. Scanning Electron Microscopy (SEM) analysis confirmed that the membrane had an asymmetric structure consisting of two layers. There was no significant influence on the addition of PDA to the morphology of the pore matrix because the modification was done by surface coating. Fourier Transform Infrared Spectroscopy (FTIR) analysis showed that PDA was successfully introduced on the surface of PVDF membrane with the appearance of O-H from cathecol and N-H peaks at wavenumber range of 3300-3600 cm-1. Modification with PDA increased the mechanical strength of the membrane which affirmed by the results of the tensile and elongation at break evaluation.
Highlights
Besides for survival, clean water is an indispensable factor for socio-economic development
The effect of PDA coating on Polyvinylidene Fluoride (PVDF) membrane was analyzed using Scanning Electron Microscopy (SEM)
Based on the results shown in the table above, it is confirmed that all the fabricated membranes in this research are classified in the ultrafiltration group
Summary
Besides for survival, clean water is an indispensable factor for socio-economic development. Conventional water treatment has become a common technique used to treat water in order to achieve drinking water, which meets the standard quality. The presence of residual chlorine as a disinfectant used in conventional water treatment processes can react with natural organic matters (NOM) and produce carcinogenic disinfection by-product precursors (DBPs) such as trihalomethane, haloacetic acids, and so on. These DBP compounds are capable of causing miscarriage and nervous system complications [3, 5,6]
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