Influence of Ultrasonication Conditions on the Structure and Performance of Poly(vinylidene fluoride) Membranes Prepared by the Phase Inversion Method

2014 ◽  
Vol 53 (19) ◽  
pp. 8228-8234 ◽  
Author(s):  
Ting Qu ◽  
Kai Pan ◽  
Li Li ◽  
Bin Liang ◽  
Lei Wang ◽  
...  
Keyword(s):  
Phase Inversion ◽  
Vinylidene Fluoride ◽  
Inversion Method ◽  
Poly Vinylidene Fluoride ◽  
And Performance ◽  
Phase Inversion Method

scholarly journals Anti-Fouling and Anti-Bacterial Modification of Poly(vinylidene fluoride) Membrane by Blending with the Capsaicin-Based Copolymer

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 323 ◽  
Author(s):  
Xiang Shen ◽  
Peng Liu ◽  
Shubiao Xia ◽  
Jianjun Liu ◽  
Rui Wang ◽  
...  
Keyword(s):  
Membrane Fouling ◽  
Vinylidene Fluoride ◽  
Pure Water ◽  
Radical Copolymerization ◽  
Inversion Method ◽  
Pvdf Membrane ◽  
Poly Vinylidene Fluoride ◽  
And Performance ◽  
Phase Inversion Method ◽  
Enhanced Surface

Membrane fouling induced by the adsorption of organic matter, and adhesion andpropagation of bacteria onto the surfaces, is the major obstacle for the wide application of membranetechnology. In this work, the capsaicin-based copolymer (PMMA-PACMO-Capsaicin) wassynthesized via radical copolymerization using methyl methacrylate (MMA), N-acrylomorpholine(ACMO) and 8-methyl-N-vanillyl-6-nonenamide (capsaicin) as monomers. Subsequently, thecapsaicin-based copolymer was readily blended with PVDF to fabricate PVDF/PMMA-PACMOCapsaicinflat sheet membrane via immersed phase inversion method. The effects of copolymerconcentration on the structure and performance of resultant membranes were evaluatedsystematically. With increase of PMMA-PACMO-Capsaicin copolymer concentration in the castingsolution, the sponge-like layer at the membrane cross-section transfers to macroviod, and the poresize and porosity of membranes increase remarkably. The adsorbed bovine serum albumin protein(BSA) amounts to PVDF/PMMA-PACMO-Capsaicin membranes decrease significantly because ofthe enhanced surface hydrophilicty. During the cycle filtration of pure water and BSA solution, theprepared PVDF/PMMA-PACMO-Capsaicin membranes have a higher flux recovery ratio (FFR) andlower irreversible membrane fouling ratio (Rir), as compared with pristine PVDF membrane.PVDF/PMMA-PACMO-Capsaicin membrane is found to suppress the growth and propagation ofStaphylococcus aureus bacteria, achieving an anti-bacterial efficiency of 88.5%. These results confirmthat the anti-fouling and anti-bacterial properties of PVDF membrane are enhanced obviously byblending with the PMMA-PACMO-Capsaicin copolymer.

scholarly journals An Experimental Investigation: Effect of Phase Inversion Methods on Membrane Structure and Its Performance on PEG Filtration

2017 ◽  
Vol 17 (1) ◽  
Author(s):  
Masooma Irfan ◽  
Hatijah Basri ◽  
M. Irfan
Keyword(s):  
Phase Separation ◽  
Phase Inversion ◽  
Multiwall Carbon Nanotubes ◽  
Polymeric Membranes ◽  
Inversion Method ◽  
Inversion Process ◽  
Membrane Morphology ◽  
And Performance ◽  
Phase Inversion Method ◽  
Multiwall Carbon

In this work, the effect of different phase inversion process on membrane morphology and performance was studied. Polyethersulfone (PES) based polymeric membranes was fabricated containing polyvinylpyrrolidone (PVP) and carboxylic functionalized multiwall carbon nanotubes (MWCNT) as additives and polyethylene glycol (PEG) having a molecular weight 1K, 10K and 35K (Dalton) were used as a model solution for observing the rejection/filteration ability of fabricated membranes. Non-solvent induce phase separation (NIP) and dry-wet phase separation (DWP) method was adopted for membrane synthesis. The FTIR spectra showed that PVP/MWCNT was effectively blended with PES polymer and different phase inversion method led to different internal morphologies of membranes as confirmed by FESEM images. The PEG rejection results suggested that membranes formed by DWP method had approximately double rejection ability than membranes formed by NIP process.

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