Polydopamine‐coated poly(vinylidene fluoride) membranes with high ultraviolet resistance and antifouling properties for a photocatalytic membrane reactor

Abstract

We modified poly(vinylidene fluoride) (PVDF) membranes with a polydopamine (PDA) coating for photocatalytic membrane reactor application with appropriate UV resistance and studied the effects of the PDA coating conditions (i.e., coating time and dopamine concentration) and UV irradiation time on the modified PVDF membrane properties. The PVDF membrane that was surface‐coated with the appropriate dopamine solution concentration and coating time played a key role in controlling the membrane properties and in protecting the modified membrane against UV radiation. The optimization of the coating condition not only completely protected the modified membrane from free‐radical attack initiated through UV irradiation but also improved the membrane hydrophilicity, antifouling properties, filtration performance, and mechanical strength of the membrane. UV irradiation of the membrane that was surface‐coated with a high‐concentration dopamine solution for a long coating time resulted in a higher mechanical strength than that of the membrane without the application of UV irradiation. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47312.

Two-Step Dopamine-to-Polydopamine Modification of Polyethersulfone Ultrafiltration Membrane for Enhancing Anti-Fouling and Ultraviolet Resistant Properties

“…This is because, at high dopamine concentrations and long polymerization times, the PDA layer formed on the membrane due to the polymerization triggered by the Tris-HCl solution is also getting thicker. The PDA layer formed on the membrane surface reduces the morphological damage caused by UV radiation, as reported in our previous research [28], even though the results are not as excellent as the membrane modified with a surface coating. It is worth noting the test was done under extreme exposure to accelerate the degradation process.…”

Zwitterionic Polymer Brush Grafted on Polyvinylidene Difluoride Membrane Promoting Enhanced Ultrafiltration Performance with Augmented Antifouling Property

“…Several organic/inorganic materials were used for the modification of the commercial PVDF membrane surface by performing UF on the PVDF surface on acrylic and amino monomers using UV photo-grafting [ 30 ]. Muchtar et al reported on a poly(vinylidene fluoride) surface-coated polydopamine using UV light treatment to enhance bovine serum albumin (BSA) rejection [ 31 ], PVDF-graphene oxide (GO)/TiO 2 hybrid membrane was used to enhance BSA performance under UV-light irradiation [ 32 ], and TiO 2 /PVDF membrane was treated with UV light to improve the self-cleaning (antifouling) performance of BSA [ 33 ]. In addition, UV-treated surface modification of the PVDF membrane gives better performance, including excellent physicochemical absorption and high stability, which enables strong antifouling performance of the membrane, making it a potential candidate for the UF applications.…”

Development of Polyvinylidene Fluoride Membrane by Incorporating Bio-Based Ginger Extract as Additive

“…The permeation performance of membranes was characterized by the pure water flux (Equation (1)). A sheet of membrane with effective area of 9.075 cm 2 was placed in a crossflow filtration cell, as described previously [ 3 , 23 ]. Distilled water feed was pumped into the filtration cell using a peristaltic pump (Watson Marlow, UK) with rotational speed 25 rpm.…”

“…The membrane fouling phenomena is strongly affected by the interactions between foulant and membrane materials, typically through surface hydrophobic–hydrophobic interaction. Therefore, although pristine polymeric-based membranes are superior in mechanical and flexibility properties, they are prone to foul because of their hydrophobic nature [ 2 , 3 , 4 ].…”