Sulfonic nanohydrogelled surface-modified microporous polyvinylidene fluoride membrane with excellent antifouling performance for treating water-oil separation of kitchen wastewater

Superhydrophilic PVDF Membrane Modified by Norepinephrine/Acrylic Acid via Self-Assembly for Efficient Separation of an Oil-in-Water Emulsion

“…A broad peak of 3500–3200 cm –1 was composed of three groups, namely, −OH, −NH, and −NH 2. These three groups showed very broad peaks due to the similar dipole moments between nitrogen, oxygen, and hydrogen atoms.…”

“…In the C 1s spectrum of the pristine PVDF membrane (Figure b), the binding energies were 284.8, 286.19, and 290.69 eV, representing the peaks formed by the three chemical bonds C–H, C–C, and C–F, respectively. A characteristic peak of O–CO at 287.79 eV was observed in the PVDF membrane, which was attributed to the additives in the pristine membrane production process. After modification, the atomic percentage of fluorine in the PVDF- g -PNE membrane was reduced to 11.38%, while that in PVDF- g -PAA was 30.36%.…”

“…In our previous work, we prepared a superhydrophilic microporous PVDF membrane, which underwent two steps: surface modification by acrylic acid (AA) and sulfonic nanohydrogel introduction. The sulfonic nanohydrogel coating fixed by PAA absorbed water to build a hydrophilic layer, which enabled the membrane not only to maintain high permeability when faced with organic pollutants such as oil, protein, and humic acid but also to have excellent antifouling properties . Zhu et al prepared a superoleophobic membrane via a surface-initiated atom transfer radical polymerization (SI-ATRP) technique, and the oil/water separation efficiency was close to 100%.…”

“…In the antiprotein fouling experiment, the membrane flux was stable at 93.6 kg·m –2 ·h –1 , which proved that PNE had a positive role in the process of antiprotein adhesion. In recent years, the acrylic-modified PVDF membrane was treated as self-assembly intermediates followed by the introduction of hydrophilic nanoparticles, and the final results demonstrated that such a method was very efficient. ,, Norepinephrine/acrylic acid hydrophilic modification of the PVDF membrane for oil/water separation has not been reported.…”

Facile ultrasonic preparation of a polypyrrole membrane as an absorbent for efficient oil-water separation and as an antimicrobial agent

“…Considering the frequent oil spill worldwide, it is of uttermost importance to isolate and separate oily wastewater from the ocean, lakes, and river waters [1] , [2] , [3] . Various chemical, biological, and mechanical processes have been explored for dealing with oil–water contamination, e.g., filtration [4] , degradation [5] , skimming [6] , in situ burning [7] , and separation [8] , [9] . A fast and simple step to remove the bulk oil is an important route to avoid further environmental pollution and the spread of contaminated water.…”