Influence of solvent composition and non-solvent activity on the crystalline morphology of PVDF membranes prepared by VIPS process and on their arising mechanical properties

In-situ formation of polyvinylidene fluoride microspheres within polycaprolactone electrospun mats

“…This promoted the solvent/nonsolvent exchange, and the downward-facing surface of both PCL-13PVDF and PCL-16PVDF membranes was characterised by particles smaller than those on the upward-facing surface. As reported in the literature [26], the size of PVDF globular structures produced by VIPS increases when the phase separation process is delayed (slow solvent evaporation and/or slow nonsolvent penetration); on the contrary, in conditions of fast phase separation, crystallites have not enough time to grow and the corresponding nodules are smaller.…”

Improving membrane distillation performance: Morphology optimization of hollow fiber membranes with selected non-solvent in dope solution

“…Polyvinylidene fluoride (PVDF) is favored as the base material for MD membranes due to its low thermal conductivity, high chemical resistance and mechanical strength (García-Payo, Essalhi, & Khayet, 2010;Venault, Chang, Wu, & Wang, 2014). Unlike other non-reactive hydrophobic polymers, PVDF can be used to fabricate cost-effective membranes as it can be easily dissolved in various common solvents.…”

Enhanced Cu(II) rejection and fouling reduction through fabrication of PEG-PES nanocomposite ultrafiltration membrane with PEG-coated cobalt doped iron oxide nanoparticle

“…Such ununiformed distribution and agglomeration can further lead to microdefects and thus their membrane enhancement purpose [15][16][17] becomes irrelevant. Therefore, in most reported literature, the amount of nanoparticles used in membrane modification is widely kept in small amounts (<4% wt) [15,17]. To further improve the distribution of the nanoparticles as well as to minimize the nanoparticle agglomeration, PEG was widely used as the coating agent for iron oxide nanoparticle and its derivative [18].…”