Antifouling PVDF membrane prepared by VIPS for microalgae harvesting

Venault, Antoine; Ballad, Melibeth Rose B.; Huang, Yan‐Hua; Liu, Yi-Hung; Kao, Chi-Han; Chang, Yung

doi:10.1016/j.ces.2015.11.041

Cited by 37 publications

(9 citation statements)

References 40 publications

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“…However, with increasing the PVDF content in the solution, very small particles were observed on the 5 μm SiO 2 powder (Figure d–f). When PVDF is cured at a relatively high humidity, vapor-induced phase separation occurs, leading to agglomeration of PVDF and formation of a nonpolar α-phase crystal. , In our experiments, dominant formation of the nonpolar α-phase with a minor polar β-phase was observed in XRD and FT-IR analyses (Figure S7 of the Supporting Information). − As the PVDF concentration increased, the amount of PDMS between the SiO 2 powders decreased and the nonpolar α-phase crystal of PVDF increased.…”

Section: Resultssupporting

confidence: 52%

Icephobic Coating through a Self-Formed Superhydrophobic Surface Using a Polymer and Microsized Particles

Moon

Yasmeen

Park

et al. 2022

ACS Appl. Mater. Interfaces

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Icephobic coatings have been extensively studied for decades to overcome the potential damage associated with ice formation in various devices that are operated under harsh weather conditions. Superhydrophobic surface coatings have been applied for icephobic coating applications owing to their low surface energy. In this study, an icephobic coating of a self-formed superhydrophobic surface using polydimethylsiloxane (PDMS) and SiO 2 powder was investigated. The effect of superhydrophobicity on icephobicity was determined by varying the experimental parameters. Polyvinylidene fluoride (PVDF) was added to the PDMS solution to improve the mechanical properties of the icephobic layer. The PDMS−PVDF solution also showed a self-formation behavior into a superhydrophobic surface. In addition, the icephobicity and mechanical properties of the PDMS−PVDF mixture coating improved because of the multilevel nanostructure formed by physical and chemical interactions between the mixture and SiO 2 powder. We believe that the proposed approach will be a suitable candidate for various practical applications of icephobicity and a model system to understand the correlation between superhydrophobicity and icephobicity.

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Section: Resultssupporting

confidence: 52%

Icephobic Coating through a Self-Formed Superhydrophobic Surface Using a Polymer and Microsized Particles

Moon

Yasmeen

Park

et al. 2022

ACS Appl. Mater. Interfaces

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“…These values are higher than those observed for the membranes prepared through VIPS-NIPS procedure, and this behavior may be attributed to the presence of macrovoids, thus to a higher membrane specific area [ 41 , 42 ]. According to studies reported in literature, the bulk porosity increased with the increase of time interval during which nascent membranes were exposed to water vapour [ 39 , 43 ].…”

Section: Resultsmentioning

confidence: 99%

The Formation of Polyvinylidene Fluoride Membranes with Tailored Properties via Vapour/Non-Solvent Induced Phase Separation

2018

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The present investigation reports as it is possible to prepared polyvinylidene fluoride (PVDF) membranes for microfiltration (MF) and ultrafiltration (UF) applications, by using triethyl phosphate (TEP) as non–toxic solvent in accordance with the Green Chemistry. Casting solutions containing different concentrations of polyethylene glycol (PEG) were prepared in order to study its effect on the final membrane morphology and properties. The possibility to finely modulate membrane properties was also investigated by applying two different membrane preparation techniques, the Non-Solvent Induced Phase Separation (NIPS) and its coupling with Vapour Induced Phase Separation (VIPS). Membranes’ morphology was detected by Scanning Electron Microscopy (SEM). Thickness, porosity, contact angle, pore size and water permeability were also recorded. Both the PEG content in the dope solution and the selected time intervals during which the nascent films were exposed to established relative humidity and temperature were found to play a crucial role in membrane formation. In particular, it was demonstrated as, by varying PEG content between 10 and 20 wt %, and by setting the exposure time to humidity at 0/2.5/5/7.5 min, membranes with different pore diameter and bicontinuous structure, suitable for UF and MF applications, could be easily obtained.

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“…[1,2]. However, membrane fouling caused by organic and microbial contamination or inorganic deposition deteriorates the performance of nanofiltration membranes which shortens the membranes service life and increases the application cost [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

High Flux and Antifouling Nanofiltration Membrane Modified by Ag@UiO-66-NH2 and Its Application for Biphenol A Removal

Chen

et al. 2022

Advances in Polymer Technology

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Owing to the specific porous structure which could provide additional passage channel for some molecules, metal organic frameworks are attractive candidates for enhancing permeability and selectivity of membranes in pervaporation, reverse osmosis, and gas separation. In this experiment, Ag@UiO-66-NH2 was introduced into polyamide separation layer by interfacial polymerization of triethylenetetramine and 1,3,5-benzenetricarboxylic acid chloride for nanofiltration. The results indicated that Ag@UiO-66-NH2 nanoparticles did endow the membranes with rapid diffusion pathways for water molecules. When the content of Ag@UiO-66-NH2 was 0.03 g, the prepared membrane (NF-Ag-3) showed high flux about 47.3 L·m-2·h-1 at 0.6 MPa, which is about 2-fold higher than that of polyamide membrane without Ag@UiO-66-NH2, while the MgSO4 rejection rate remained about 87.4%. The membrane also showed excellent antifouling properties, and the water flux recovery ratio was 95.6% after filtration BSA solution. When it was applied for 50 mg/L bisphenol A removal, the rejection rate reached 94.6%, and the flux is about 49.1 L·m-2·h-1. Moreover, Ag particles on UiO-66-NH2 rendered the membrane with good inhibition for Escherichia coli. The antibacterial rate of the membranes is above 95% when the loading of Ag@UiO-66-NH2 is more than 0.03 g.

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Antifouling PVDF membrane prepared by VIPS for microalgae harvesting

Cited by 37 publications

References 40 publications

Icephobic Coating through a Self-Formed Superhydrophobic Surface Using a Polymer and Microsized Particles

Icephobic Coating through a Self-Formed Superhydrophobic Surface Using a Polymer and Microsized Particles

The Formation of Polyvinylidene Fluoride Membranes with Tailored Properties via Vapour/Non-Solvent Induced Phase Separation

High Flux and Antifouling Nanofiltration Membrane Modified by Ag@UiO-66-NH2 and Its Application for Biphenol A Removal

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