One-step electrospinning PVDF/PVP-TiO2 hydrophilic nanofiber membrane with strong oil-water separation and anti-fouling property

Recent Progress on Nanomaterial-Based Membranes for Water Treatment

“…Several studies reported the use of electrospinning for the preparation of nanofiber membranes for water treatment applications. Du, et al [133] prepared via one-step electrostatic spinning of a polyvinylpyrrolidone (PVP), polyvinylidene fluoride (PVDF), and an inorganic titanium dioxide (TiO 2 ) nanoparticles blend nanofiber membrane. The presence of PVDF increases the strength and chemical resistance of the membrane.…”

“…The synthesized membrane in this study showed a high separation efficiency (98.4%) for various emulsions, great antifouling properties with a remarkable flux recovery rate (FRR 95.68%), and a low total fouling ratio (15.18%) after many cycles. Thus, the electrospinning method is a remarkable method for the preparation of nanofiber membranes to be used in water treatment processes [133].…”

“…However, the most frequently used nanofiber membrane modification methods, including grafting and surface coating, are strictly limited, and thus reduce their use in several applications. Thus, Du, Wang, Liu, Wang and Yu [133] used a one-step electrostatic spinning technique to fabricate a polyvinylpyrrolidone (PVP), polyvinylidene fluoride (PVDF), and inorganic titanium dioxide (TiO 2 ) nanoparticle blend nanofiber membrane. The addition of these chemicals increased the nanofiber membrane mechanical strength, hydrophilicity, and chemical resistance.…”

“…The results of this study show that the produced membrane attained a separation efficiency of 98.4% for several emulsions, distinguishable antifouling properties with a high flux recovery rate reaching 95.68%, and a low total fouling ratio up to 15.18%, after its use in several cycles. Thus, the fabricated membrane is an excellent choice for oil/water separation applications [133]. Xu, et al [137] synthesized a unique tubular polyvinyl chloride (PVC) hybrid nanofiber membrane using hydrophobic nanosilica (SiO 2 ) as the inorganic additive and a polyester (PET) hollow braided tube as the support.…”

Progress of low-frequency sound absorption research utilizing intelligent materials and acoustic metamaterials

“…Various methods have been proposed to increase the polar β-phase content in PVDF, such as the addition of nanofillers, 100,101 use of centrifugal spinning techniques, 102 and electrostatic spinning techniques. 103 Mohamed et al prepared open-cell PVDF foams by the sugar template method and increased the polar β-phase content by subjecting the foams to annealing heat treatment, as shown in Fig. 8(a) , which leads to not only an increase in the polar β-phase but also an enhancement of the local polarization, and subsequently a significant increase of the sound absorption coefficient in the frequency range of 500–6400 Hz.…”