In this study we used the near-field electrospinning (NFES) process with the metallic coaxial needle injector to fabricate piezoelectric poly(vinylidene fluoride) (PVDF) hollow fiber tubes. Using these tubes, we designed an energy capture device featuring parallel electrodes to harvest low-frequency energy. We examined the effects of several parameters on the properties of the piezoelectric PVD...

oily wastewaters from oil refineries and oil distribution centers are one of the most important environmental concerns in recent decades; therefore, it is critical to treat these types of wastewaters. in this study, the performance of different polyethersulfone hollow fiber membranes in oily wastewaters treatment was investigated and the effects of operating conditions such as transmembrane pre...

Hydrophilic polyethersulfone (PES) hollow fiber membranes were prepared via non-solvent induced phase separation (NIPS) by addition of polymeric additives as a membrane modifying agent. The effect of the addition of hydrophilic surfactant Pluronic F127, Polyivinylpyrrolidone (PVP), and Tetronic 1307 on the performance of the final PES hollow-fiber membrane was investigated. The morphology of fa...

Abstract Polyvinylidene fluoride (PVDF) hollow fiber membranes were developed by the thermally induced phase separation (TIPS) process using a triple-orifice spinneret with solvent co-extrusion at outermost channel for applications in membrane distillation (MD). The polymer surface concentration during preparation was controlled exploiting interfacial interactions of diluent and extruded surfac...

Given the significance of dissolved H2S, various techniques have been explored in literature. The current review describes detail membrane-based techniques, such as membrane contactors, for removing H2S from wastewater streams. Various types hydrophobic membranes used, with more emphasis placed on PVDF hollow fiber membranes. do not allow water to pass through, whereas is readily allowed throug...

For the first time, a ZIF-8 membrane was grown on the inner surface of a ceramic hollow fiber via cycling precursors. The inner-side hollow fiber ZIF-8 membrane exhibits good performance for recovering hydrogen.

Membrane fouling is a major obstacle for ultrafiltration (UF) in water treatment. Here, strategy mitigation, by applying an ultra-low concentration of moderately-hydrophobic chitosan (MHC) and using mildly elevated backwash temperature was proposed. The effects MHC type, concentration, were investigated continuous-flow tests PVDF hollow fiber membranes model raw water. Compared to the process w...